470 Commits

Author	SHA1	Message	Date
Linus Torvalds	0c02183427	ARM: ... * Clean up vCPU targets, always returning generic v8 as the preferred target * Trap forwarding infrastructure for nested virtualization (used for traps that are taken from an L2 guest and are needed by the L1 hypervisor) * FEAT_TLBIRANGE support to only invalidate specific ranges of addresses when collapsing a table PTE to a block PTE. This avoids that the guest refills the TLBs again for addresses that aren't covered by the table PTE. * Fix vPMU issues related to handling of PMUver. * Don't unnecessary align non-stack allocations in the EL2 VA space * Drop HCR_VIRT_EXCP_MASK, which was never used... * Don't use smp_processor_id() in kvm_arch_vcpu_load(), but the cpu parameter instead * Drop redundant call to kvm_set_pfn_accessed() in user_mem_abort() * Remove prototypes without implementations RISC-V: * Zba, Zbs, Zicntr, Zicsr, Zifencei, and Zihpm support for guest * Added ONE_REG interface for SATP mode * Added ONE_REG interface to enable/disable multiple ISA extensions * Improved error codes returned by ONE_REG interfaces * Added KVM_GET_REG_LIST ioctl() implementation for KVM RISC-V * Added get-reg-list selftest for KVM RISC-V s390: * PV crypto passthrough enablement (Tony, Steffen, Viktor, Janosch) Allows a PV guest to use crypto cards. Card access is governed by the firmware and once a crypto queue is "bound" to a PV VM every other entity (PV or not) looses access until it is not bound anymore. Enablement is done via flags when creating the PV VM. * Guest debug fixes (Ilya) x86: * Clean up KVM's handling of Intel architectural events * Intel bugfixes * Add support for SEV-ES DebugSwap, allowing SEV-ES guests to use debug registers and generate/handle #DBs * Clean up LBR virtualization code * Fix a bug where KVM fails to set the target pCPU during an IRTE update * Fix fatal bugs in SEV-ES intrahost migration * Fix a bug where the recent (architecturally correct) change to reinject #BP and skip INT3 broke SEV guests (can't decode INT3 to skip it) * Retry APIC map recalculation if a vCPU is added/enabled * Overhaul emergency reboot code to bring SVM up to par with VMX, tie the "emergency disabling" behavior to KVM actually being loaded, and move all of the logic within KVM * Fix user triggerable WARNs in SVM where KVM incorrectly assumes the TSC ratio MSR cannot diverge from the default when TSC scaling is disabled up related code * Add a framework to allow "caching" feature flags so that KVM can check if the guest can use a feature without needing to search guest CPUID * Rip out the ancient MMU_DEBUG crud and replace the useful bits with CONFIG_KVM_PROVE_MMU * Fix KVM's handling of !visible guest roots to avoid premature triple fault injection * Overhaul KVM's page-track APIs, and KVMGT's usage, to reduce the API surface that is needed by external users (currently only KVMGT), and fix a variety of issues in the process This last item had a silly one-character bug in the topic branch that was sent to me. Because it caused pretty bad selftest failures in some configurations, I decided to squash in the fix. So, while the exact commit ids haven't been in linux-next, the code has (from the kvm-x86 tree). Generic: * Wrap kvm_{gfn,hva}_range.pte in a union to allow mmu_notifier events to pass action specific data without needing to constantly update the main handlers. * Drop unused function declarations Selftests: * Add testcases to x86's sync_regs_test for detecting KVM TOCTOU bugs * Add support for printf() in guest code and covert all guest asserts to use printf-based reporting * Clean up the PMU event filter test and add new testcases * Include x86 selftests in the KVM x86 MAINTAINERS entry -----BEGIN PGP SIGNATURE----- iQFIBAABCAAyFiEE8TM4V0tmI4mGbHaCv/vSX3jHroMFAmT1m0kUHHBib256aW5p QHJlZGhhdC5jb20ACgkQv/vSX3jHroMNgggAiN7nz6UC423FznuI+yO3TLm8tkx1 CpKh5onqQogVtchH+vrngi97cfOzZb1/AtifY90OWQi31KEWhehkeofcx7G6ERhj 5a9NFADY1xGBsX4exca/VHDxhnzsbDWaWYPXw5vWFWI6erft9Mvy3tp1LwTvOzqM v8X4aWz+g5bmo/DWJf4Wu32tEU6mnxzkrjKU14JmyqQTBawVmJ3RYvHVJ/Agpw+n hRtPAy7FU6XTdkmq/uCT+KUHuJEIK0E/l1js47HFAqSzwdW70UDg14GGo1o4ETxu RjZQmVNvL57yVgi6QU38/A0FWIsWQm5IlaX1Ug6x8pjZPnUKNbo9BY4T1g== =W+4p -----END PGP SIGNATURE----- Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm Pull kvm updates from Paolo Bonzini: "ARM: - Clean up vCPU targets, always returning generic v8 as the preferred target - Trap forwarding infrastructure for nested virtualization (used for traps that are taken from an L2 guest and are needed by the L1 hypervisor) - FEAT_TLBIRANGE support to only invalidate specific ranges of addresses when collapsing a table PTE to a block PTE. This avoids that the guest refills the TLBs again for addresses that aren't covered by the table PTE. - Fix vPMU issues related to handling of PMUver. - Don't unnecessary align non-stack allocations in the EL2 VA space - Drop HCR_VIRT_EXCP_MASK, which was never used... - Don't use smp_processor_id() in kvm_arch_vcpu_load(), but the cpu parameter instead - Drop redundant call to kvm_set_pfn_accessed() in user_mem_abort() - Remove prototypes without implementations RISC-V: - Zba, Zbs, Zicntr, Zicsr, Zifencei, and Zihpm support for guest - Added ONE_REG interface for SATP mode - Added ONE_REG interface to enable/disable multiple ISA extensions - Improved error codes returned by ONE_REG interfaces - Added KVM_GET_REG_LIST ioctl() implementation for KVM RISC-V - Added get-reg-list selftest for KVM RISC-V s390: - PV crypto passthrough enablement (Tony, Steffen, Viktor, Janosch) Allows a PV guest to use crypto cards. Card access is governed by the firmware and once a crypto queue is "bound" to a PV VM every other entity (PV or not) looses access until it is not bound anymore. Enablement is done via flags when creating the PV VM. - Guest debug fixes (Ilya) x86: - Clean up KVM's handling of Intel architectural events - Intel bugfixes - Add support for SEV-ES DebugSwap, allowing SEV-ES guests to use debug registers and generate/handle #DBs - Clean up LBR virtualization code - Fix a bug where KVM fails to set the target pCPU during an IRTE update - Fix fatal bugs in SEV-ES intrahost migration - Fix a bug where the recent (architecturally correct) change to reinject #BP and skip INT3 broke SEV guests (can't decode INT3 to skip it) - Retry APIC map recalculation if a vCPU is added/enabled - Overhaul emergency reboot code to bring SVM up to par with VMX, tie the "emergency disabling" behavior to KVM actually being loaded, and move all of the logic within KVM - Fix user triggerable WARNs in SVM where KVM incorrectly assumes the TSC ratio MSR cannot diverge from the default when TSC scaling is disabled up related code - Add a framework to allow "caching" feature flags so that KVM can check if the guest can use a feature without needing to search guest CPUID - Rip out the ancient MMU_DEBUG crud and replace the useful bits with CONFIG_KVM_PROVE_MMU - Fix KVM's handling of !visible guest roots to avoid premature triple fault injection - Overhaul KVM's page-track APIs, and KVMGT's usage, to reduce the API surface that is needed by external users (currently only KVMGT), and fix a variety of issues in the process Generic: - Wrap kvm_{gfn,hva}_range.pte in a union to allow mmu_notifier events to pass action specific data without needing to constantly update the main handlers. - Drop unused function declarations Selftests: - Add testcases to x86's sync_regs_test for detecting KVM TOCTOU bugs - Add support for printf() in guest code and covert all guest asserts to use printf-based reporting - Clean up the PMU event filter test and add new testcases - Include x86 selftests in the KVM x86 MAINTAINERS entry" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (279 commits) KVM: x86/mmu: Include mmu.h in spte.h KVM: x86/mmu: Use dummy root, backed by zero page, for !visible guest roots KVM: x86/mmu: Disallow guest from using !visible slots for page tables KVM: x86/mmu: Harden TDP MMU iteration against root w/o shadow page KVM: x86/mmu: Harden new PGD against roots without shadow pages KVM: x86/mmu: Add helper to convert root hpa to shadow page drm/i915/gvt: Drop final dependencies on KVM internal details KVM: x86/mmu: Handle KVM bookkeeping in page-track APIs, not callers KVM: x86/mmu: Drop @slot param from exported/external page-track APIs KVM: x86/mmu: Bug the VM if write-tracking is used but not enabled KVM: x86/mmu: Assert that correct locks are held for page write-tracking KVM: x86/mmu: Rename page-track APIs to reflect the new reality KVM: x86/mmu: Drop infrastructure for multiple page-track modes KVM: x86/mmu: Use page-track notifiers iff there are external users KVM: x86/mmu: Move KVM-only page-track declarations to internal header KVM: x86: Remove the unused page-track hook track_flush_slot() drm/i915/gvt: switch from ->track_flush_slot() to ->track_remove_region() KVM: x86: Add a new page-track hook to handle memslot deletion drm/i915/gvt: Don't bother removing write-protection on to-be-deleted slot KVM: x86: Reject memslot MOVE operations if KVMGT is attached ...	2023-09-07 13:52:20 -07:00
Linus Torvalds	ec0e2dc810	VFIO updates for v6.6-rc1 ... - VFIO direct character device (cdev) interface support. This extracts the vfio device fd from the container and group model, and is intended to be the native uAPI for use with IOMMUFD. (Yi Liu) - Enhancements to the PCI hot reset interface in support of cdev usage. (Yi Liu) - Fix a potential race between registering and unregistering vfio files in the kvm-vfio interface and extend use of a lock to avoid extra drop and acquires. (Dmitry Torokhov) - A new vfio-pci variant driver for the AMD/Pensando Distributed Services Card (PDS) Ethernet device, supporting live migration. (Brett Creeley) - Cleanups to remove redundant owner setup in cdx and fsl bus drivers, and simplify driver init/exit in fsl code. (Li Zetao) - Fix uninitialized hole in data structure and pad capability structures for alignment. (Stefan Hajnoczi) -----BEGIN PGP SIGNATURE----- iQJPBAABCAA5FiEEQvbATlQL0amee4qQI5ubbjuwiyIFAmTvnDUbHGFsZXgud2ls bGlhbXNvbkByZWRoYXQuY29tAAoJECObm247sIsimEEP/AzG+VRcu5LfYbLGLe0z zB8ts6G7S78wXlmfN/LYi3v92XWvMMcm+vYF8oNAMfr1YL5sibWN6UtQfY1KCr7h nWKdQdqjajJ5yDDZnOFdhqHJGNfmZw6+fey8Z0j8zRI2oymK4DncWWX3g/7L1SNr 9tIexGJef+mOdAmC94yOut3YviAaZ+f95T/xrdXHzzoNr50DD0+PD6AJdKJfKggP vhiC/DAYH3Fofaa6tRasgWuKCYWdjZLR/kxgNpeEmW6kZnbq/dnzZ+kgn4HH1f9G 8p7UKVARR6FfG5aLheWu6Y9PDaKnfnqu8y/hobuE/ivXcmqqK+a6xSxrjgbVs8WJ 94SYnTBRoTlDJaKWa7GxqdgzJnV+s5ZyAgPhjzdi6mLTPWGzkuLhFWGtYL+LZAQ6 pNeZSM6CFBk+bva/xT0nNPCXxPh+/j/Y0G18FREj8aPFc03HrJQqz0RLydvTnoDz nX/by5KdzMSVSVLPr4uDMtAsgxsGqWiFcp7QMw1HhhlLWxqmYbA+mLZaqyMZUUOx 6b/P8WXT9P2I+qPVKWQ5CWyqpsEqm6P+72yg6LOM9kINvgwDhOa7cagMXIuMWYMH Rf97FL+K8p1eIy6AnvRHgFBMM5185uG+0YcJyVqtucDr/k8T/Om6ujAI6JbWtNe6 cLgaVAqKOYqCR4HC9bfVGSbd =eKSR -----END PGP SIGNATURE----- Merge tag 'vfio-v6.6-rc1' of https://github.com/awilliam/linux-vfio Pull VFIO updates from Alex Williamson: - VFIO direct character device (cdev) interface support. This extracts the vfio device fd from the container and group model, and is intended to be the native uAPI for use with IOMMUFD (Yi Liu) - Enhancements to the PCI hot reset interface in support of cdev usage (Yi Liu) - Fix a potential race between registering and unregistering vfio files in the kvm-vfio interface and extend use of a lock to avoid extra drop and acquires (Dmitry Torokhov) - A new vfio-pci variant driver for the AMD/Pensando Distributed Services Card (PDS) Ethernet device, supporting live migration (Brett Creeley) - Cleanups to remove redundant owner setup in cdx and fsl bus drivers, and simplify driver init/exit in fsl code (Li Zetao) - Fix uninitialized hole in data structure and pad capability structures for alignment (Stefan Hajnoczi) * tag 'vfio-v6.6-rc1' of https://github.com/awilliam/linux-vfio: (53 commits) vfio/pds: Send type for SUSPEND_STATUS command vfio/pds: fix return value in pds_vfio_get_lm_file() pds_core: Fix function header descriptions vfio: align capability structures vfio/type1: fix cap_migration information leak vfio/fsl-mc: Use module_fsl_mc_driver macro to simplify the code vfio/cdx: Remove redundant initialization owner in vfio_cdx_driver vfio/pds: Add Kconfig and documentation vfio/pds: Add support for firmware recovery vfio/pds: Add support for dirty page tracking vfio/pds: Add VFIO live migration support vfio/pds: register with the pds_core PF pds_core: Require callers of register/unregister to pass PF drvdata vfio/pds: Initial support for pds VFIO driver vfio: Commonize combine_ranges for use in other VFIO drivers kvm/vfio: avoid bouncing the mutex when adding and deleting groups kvm/vfio: ensure kvg instance stays around in kvm_vfio_group_add() docs: vfio: Add vfio device cdev description vfio: Compile vfio_group infrastructure optionally vfio: Move the IOMMU_CAP_CACHE_COHERENCY check in __vfio_register_dev() ...	2023-08-30 20:36:01 -07:00
Bjorn Helgaas	d56b699d76	Documentation: Fix typos ... Fix typos in Documentation. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Link: https://lore.kernel.org/r/20230814212822.193684-4-helgaas@kernel.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>	2023-08-18 11:29:03 -06:00
Haibo Xu	031f9efafc	KVM: riscv: Add KVM_GET_REG_LIST API support ... KVM_GET_REG_LIST API will return all registers that are available to KVM_GET/SET_ONE_REG APIs. It's very useful to identify some platform regression issue during VM migration. Since this API was already supported on arm64, it is straightforward to enable it on riscv with similar code structure. Signed-off-by: Haibo Xu <haibo1.xu@intel.com> Reviewed-by: Andrew Jones <ajones@ventanamicro.com> Signed-off-by: Anup Patel <anup@brainfault.org>	2023-08-09 12:15:25 +05:30
Daniel Henrique Barboza	e47f3c2843	docs: kvm: riscv: document EBUSY in KVM_SET_ONE_REG ... The EBUSY errno is being used for KVM_SET_ONE_REG as a way to tell userspace that a given reg can't be changed after the vcpu started. Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com> Reviewed-by: Andrew Jones <ajones@ventanamicro.com> Signed-off-by: Anup Patel <anup@brainfault.org>	2023-08-08 17:26:03 +05:30
Yi Liu	dcc31ea60b	kvm/vfio: Accept vfio device file from userspace ... This defines KVM_DEV_VFIO_FILE* and make alias with KVM_DEV_VFIO_GROUP*. Old userspace uses KVM_DEV_VFIO_GROUP* works as well. Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> Reviewed-by: Kevin Tian <kevin.tian@intel.com> Tested-by: Terrence Xu <terrence.xu@intel.com> Tested-by: Nicolin Chen <nicolinc@nvidia.com> Tested-by: Matthew Rosato <mjrosato@linux.ibm.com> Tested-by: Yanting Jiang <yanting.jiang@intel.com> Tested-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com> Tested-by: Zhenzhong Duan <zhenzhong.duan@intel.com> Signed-off-by: Yi Liu <yi.l.liu@intel.com> Link: https://lore.kernel.org/r/20230718135551.6592-6-yi.l.liu@intel.com Signed-off-by: Alex Williamson <alex.williamson@redhat.com>	2023-07-25 10:18:42 -06:00
Linus Torvalds	7210de3a32	A half-dozen late arriving docs patches. They are mostly fixes, but we ... also have a kernel-doc tweak for enums and the long-overdue removal of the outdated and redundant patch-submission comments at the top of the MAINTAINERS file. -----BEGIN PGP SIGNATURE----- iQFDBAABCAAtFiEEIw+MvkEiF49krdp9F0NaE2wMflgFAmSnR4EPHGNvcmJldEBs d24ubmV0AAoJEBdDWhNsDH5YfWIH/0b+gYD0PftjpG1MfPTlvsxm3yiO2IkZR1rX ZEvzMIk3cqDsZuhv8g4Xh3qrn7QHW9JE8XbOdkMDw+Hd1kkmYeweVhsLhcar44ai KPBXCbnd6bU6HcjT/o/AEkYVJzZDmKbt8ALi5C81xu8bWn2iybKgnJv1a3M1PFAx Dr5ne14HTEau5ewYeYPhkC2n1XRIE1BV0k4PdZlQE/67uwhplh9J2P/DiXh3I9DT 0oxh8cZHRVheCkXNYseMWEC5V+xFfh3jP/fvIefuNGCb7AGDSE4s+Wx8I9CbduIN SwFtsqXRm2cQ8aj950T0E4JQZLVY0DJKrIJo0qh3LrfUYTinQx0= =tuod -----END PGP SIGNATURE----- Merge tag 'docs-6.5-2' of git://git.lwn.net/linux Pull mode documentation updates from Jonathan Corbet: "A half-dozen late arriving docs patches. They are mostly fixes, but we also have a kernel-doc tweak for enums and the long-overdue removal of the outdated and redundant patch-submission comments at the top of the MAINTAINERS file" * tag 'docs-6.5-2' of git://git.lwn.net/linux: scripts: kernel-doc: support private / public marking for enums Documentation: KVM: SEV: add a missing backtick Documentation: ACPI: fix typo in ssdt-overlays.rst Fix documentation of panic_on_warn docs: remove the tips on how to submit patches from MAINTAINERS docs: fix typo in zh_TW and zh_CN translation	2023-07-06 22:15:38 -07:00
Changyuan Lyu	1e6115f50b	Documentation: KVM: SEV: add a missing backtick ... ``ENOTTY` -> ``ENOTTY``. Signed-off-by: Changyuan Lyu <changyuanl@google.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Message-ID: <20230624165858.21777-1-changyuanl@google.com>	2023-07-04 08:30:49 -06:00
Linus Torvalds	e8069f5a8e	ARM64: ... * Eager page splitting optimization for dirty logging, optionally allowing for a VM to avoid the cost of hugepage splitting in the stage-2 fault path. * Arm FF-A proxy for pKVM, allowing a pKVM host to safely interact with services that live in the Secure world. pKVM intervenes on FF-A calls to guarantee the host doesn't misuse memory donated to the hyp or a pKVM guest. * Support for running the split hypervisor with VHE enabled, known as 'hVHE' mode. This is extremely useful for testing the split hypervisor on VHE-only systems, and paves the way for new use cases that depend on having two TTBRs available at EL2. * Generalized framework for configurable ID registers from userspace. KVM/arm64 currently prevents arbitrary CPU feature set configuration from userspace, but the intent is to relax this limitation and allow userspace to select a feature set consistent with the CPU. * Enable the use of Branch Target Identification (FEAT_BTI) in the hypervisor. * Use a separate set of pointer authentication keys for the hypervisor when running in protected mode, as the host is untrusted at runtime. * Ensure timer IRQs are consistently released in the init failure paths. * Avoid trapping CTR_EL0 on systems with Enhanced Virtualization Traps (FEAT_EVT), as it is a register commonly read from userspace. * Erratum workaround for the upcoming AmpereOne part, which has broken hardware A/D state management. RISC-V: * Redirect AMO load/store misaligned traps to KVM guest * Trap-n-emulate AIA in-kernel irqchip for KVM guest * Svnapot support for KVM Guest s390: * New uvdevice secret API * CMM selftest and fixes * fix racy access to target CPU for diag 9c x86: * Fix missing/incorrect #GP checks on ENCLS * Use standard mmu_notifier hooks for handling APIC access page * Drop now unnecessary TR/TSS load after VM-Exit on AMD * Print more descriptive information about the status of SEV and SEV-ES during module load * Add a test for splitting and reconstituting hugepages during and after dirty logging * Add support for CPU pinning in demand paging test * Add support for AMD PerfMonV2, with a variety of cleanups and minor fixes included along the way * Add a "nx_huge_pages=never" option to effectively avoid creating NX hugepage recovery threads (because nx_huge_pages=off can be toggled at runtime) * Move handling of PAT out of MTRR code and dedup SVM+VMX code * Fix output of PIC poll command emulation when there's an interrupt * Add a maintainer's handbook to document KVM x86 processes, preferred coding style, testing expectations, etc. * Misc cleanups, fixes and comments Generic: * Miscellaneous bugfixes and cleanups Selftests: * Generate dependency files so that partial rebuilds work as expected -----BEGIN PGP SIGNATURE----- iQFIBAABCAAyFiEE8TM4V0tmI4mGbHaCv/vSX3jHroMFAmSgHrIUHHBib256aW5p QHJlZGhhdC5jb20ACgkQv/vSX3jHroORcAf+KkBlXwQMf+Q0Hy6Mfe0OtkKmh0Ae 6HJ6dsuMfOHhWv5kgukh+qvuGUGzHq+gpVKmZg2yP3h3cLHOLUAYMCDm+rjXyjsk F4DbnJLfxq43Pe9PHRKFxxSecRcRYCNox0GD5UYL4PLKcH0FyfQrV+HVBK+GI8L3 FDzUcyJkR12Lcj1qf++7fsbzfOshL0AJPmidQCoc6wkLJpUEr/nYUqlI1Kx3YNuQ LKmxFHS4l4/O/px3GKNDrLWDbrVlwciGIa3GZLS52PZdW3mAqT+cqcPcYK6SW71P m1vE80VbNELX5q3YSRoOXtedoZ3Pk97LEmz/xQAsJ/jri0Z5Syk0Ok0m/Q== =AMXp -----END PGP SIGNATURE----- Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm Pull kvm updates from Paolo Bonzini: "ARM64: - Eager page splitting optimization for dirty logging, optionally allowing for a VM to avoid the cost of hugepage splitting in the stage-2 fault path. - Arm FF-A proxy for pKVM, allowing a pKVM host to safely interact with services that live in the Secure world. pKVM intervenes on FF-A calls to guarantee the host doesn't misuse memory donated to the hyp or a pKVM guest. - Support for running the split hypervisor with VHE enabled, known as 'hVHE' mode. This is extremely useful for testing the split hypervisor on VHE-only systems, and paves the way for new use cases that depend on having two TTBRs available at EL2. - Generalized framework for configurable ID registers from userspace. KVM/arm64 currently prevents arbitrary CPU feature set configuration from userspace, but the intent is to relax this limitation and allow userspace to select a feature set consistent with the CPU. - Enable the use of Branch Target Identification (FEAT_BTI) in the hypervisor. - Use a separate set of pointer authentication keys for the hypervisor when running in protected mode, as the host is untrusted at runtime. - Ensure timer IRQs are consistently released in the init failure paths. - Avoid trapping CTR_EL0 on systems with Enhanced Virtualization Traps (FEAT_EVT), as it is a register commonly read from userspace. - Erratum workaround for the upcoming AmpereOne part, which has broken hardware A/D state management. RISC-V: - Redirect AMO load/store misaligned traps to KVM guest - Trap-n-emulate AIA in-kernel irqchip for KVM guest - Svnapot support for KVM Guest s390: - New uvdevice secret API - CMM selftest and fixes - fix racy access to target CPU for diag 9c x86: - Fix missing/incorrect #GP checks on ENCLS - Use standard mmu_notifier hooks for handling APIC access page - Drop now unnecessary TR/TSS load after VM-Exit on AMD - Print more descriptive information about the status of SEV and SEV-ES during module load - Add a test for splitting and reconstituting hugepages during and after dirty logging - Add support for CPU pinning in demand paging test - Add support for AMD PerfMonV2, with a variety of cleanups and minor fixes included along the way - Add a "nx_huge_pages=never" option to effectively avoid creating NX hugepage recovery threads (because nx_huge_pages=off can be toggled at runtime) - Move handling of PAT out of MTRR code and dedup SVM+VMX code - Fix output of PIC poll command emulation when there's an interrupt - Add a maintainer's handbook to document KVM x86 processes, preferred coding style, testing expectations, etc. - Misc cleanups, fixes and comments Generic: - Miscellaneous bugfixes and cleanups Selftests: - Generate dependency files so that partial rebuilds work as expected" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (153 commits) Documentation/process: Add a maintainer handbook for KVM x86 Documentation/process: Add a label for the tip tree handbook's coding style KVM: arm64: Fix misuse of KVM_ARM_VCPU_POWER_OFF bit index RISC-V: KVM: Remove unneeded semicolon RISC-V: KVM: Allow Svnapot extension for Guest/VM riscv: kvm: define vcpu_sbi_ext_pmu in header RISC-V: KVM: Expose IMSIC registers as attributes of AIA irqchip RISC-V: KVM: Add in-kernel virtualization of AIA IMSIC RISC-V: KVM: Expose APLIC registers as attributes of AIA irqchip RISC-V: KVM: Add in-kernel emulation of AIA APLIC RISC-V: KVM: Implement device interface for AIA irqchip RISC-V: KVM: Skeletal in-kernel AIA irqchip support RISC-V: KVM: Set kvm_riscv_aia_nr_hgei to zero RISC-V: KVM: Add APLIC related defines RISC-V: KVM: Add IMSIC related defines RISC-V: KVM: Implement guest external interrupt line management KVM: x86: Remove PRIx* definitions as they are solely for user space s390/uv: Update query for secret-UVCs s390/uv: replace scnprintf with sysfs_emit s390/uvdevice: Add 'Lock Secret Store' UVC ...	2023-07-03 15:32:22 -07:00
Paolo Bonzini	36b68d360a	KVM x86 changes for 6.5: ... - Move handling of PAT out of MTRR code and dedup SVM+VMX code - Fix output of PIC poll command emulation when there's an interrupt - Fix a longstanding bug in the reporting of the number of entries returned by KVM_GET_CPUID2 - Add a maintainer's handbook to document KVM x86 processes, preferred coding style, testing expectations, etc. - Misc cleanups -----BEGIN PGP SIGNATURE----- iQJGBAABCgAwFiEEMHr+pfEFOIzK+KY1YJEiAU0MEvkFAmSaGMMSHHNlYW5qY0Bn b29nbGUuY29tAAoJEGCRIgFNDBL5iDIP/0PwY3J5odTEUTnAyuDFPimd5PBt9k/O B414wdpSKVgzq+0An4qM9mKRnklVIh2p8QqQTvDhcBUg3xb6CX9xZ4ery7hp/T5O tr5bAXs2AYX6jpxvsopt+w+E9j6fvkJhcJCRU9im3QbrqwUE+ecyU5OHvmv2n/GO syVZJbPOYuoLPKDjlSMrScE6fWEl9UOvHc5BK/vafTeyisMG3vv1BSmJj6GuiNNk TS1RRIg//cOZghQyDfdXt0azTmakNZyNn35xnoX9x8SRmdRykyUjQeHmeqWxPDso kiGO+CGancfS57S6ZtCkJjqEWZ1o/zKdOxr8MMf/3nJhv4kY7/5XtlVoACv5soW9 bZEmNiXIaSbvKNMwAlLJxHFbLa1sMdSCb345CIuMdt5QiWJ53ZiTyIAJX6+eL+Zf 8nkeekgPf5VUs6Zt0RdRPyvo+W7Vp9BtI87yDXm1nQKpbys2pt6CD3YB/oF4QViG a5cyGoFuqRQbS3nmbshIlR7EanTuxbhLZKrNrFnolZ5e624h3Cnk2hVsfTznVGiX vNHWM80phk1CWB9McErrZVkGfjlyVyBL13CBB2XF7Dl6PfF6/N22a9bOuTJD3tvk PlNx4hvZm3esvvyGpjfbSajTKYE8O7rxiE1KrF0BpZ5IUl5WSiTr6XCy/yI/mIeM hay2IWhPOF2z =D0BH -----END PGP SIGNATURE----- Merge tag 'kvm-x86-misc-6.5' of https://github.com/kvm-x86/linux into HEAD KVM x86 changes for 6.5: * Move handling of PAT out of MTRR code and dedup SVM+VMX code * Fix output of PIC poll command emulation when there's an interrupt * Add a maintainer's handbook to document KVM x86 processes, preferred coding style, testing expectations, etc. * Misc cleanups	2023-07-01 07:08:59 -04:00
Linus Torvalds	6aeadf7896	Move the arm64 architecture documentation under Documentation/arch/. This ... brings some order to the documentation directory, declutters the top-level directory, and makes the documentation organization more closely match that of the source. -----BEGIN PGP SIGNATURE----- iQFDBAABCAAtFiEEIw+MvkEiF49krdp9F0NaE2wMflgFAmSbDsIPHGNvcmJldEBs d24ubmV0AAoJEBdDWhNsDH5Y+ksH/2Xqun1ipPvu66+bBdPIf8N9AVFatl2q3mt4 tgX3A4RH3Ejklb4GbRLOIP23PmCxt7LRv4P05ttw8VpTP3A+Cw1d1s2RxiXGvfDE j7IW6hrpUmVoDdiDCRGtjdIa7MVI5aAsj8CCTjEFywGi5CQe0Uzq4aTUKoxJDEnu GYVy2CwDNEt4GTQ6ClPpFx2rc4UZf/H2XqXsnod9ef8A5Nkt3EtgoS1hh3o1QZGA Mqx2HAOVS1tb6GUVUbVLCdj40+YjBLjXFlsH4dA+wsFFdUlZLKuTesdiAMg2X6eT E8C/6oRT+OiWbrnXUTJEn8z98Ds8VHn7D4n97O9bIQ+R9AFtmPI= =H/+D -----END PGP SIGNATURE----- Merge tag 'docs-arm64-move' of git://git.lwn.net/linux Pull arm64 documentation move from Jonathan Corbet: "Move the arm64 architecture documentation under Documentation/arch/. This brings some order to the documentation directory, declutters the top-level directory, and makes the documentation organization more closely match that of the source" * tag 'docs-arm64-move' of git://git.lwn.net/linux: perf arm-spe: Fix a dangling Documentation/arm64 reference mm: Fix a dangling Documentation/arm64 reference arm64: Fix dangling references to Documentation/arm64 dt-bindings: fix dangling Documentation/arm64 reference docs: arm64: Move arm64 documentation under Documentation/arch/	2023-06-27 21:52:15 -07:00
Linus Torvalds	a354049532	It's been a relatively calm cycle in docsland. We do have: ... - Some initial page-table documentation from Linus (the other Linus) - Regression-handling documentation improvements from Thorsten - Addition of kerneldoc documentation for the ERR_PTR() and related macros from James Seo ...and the usual collection of fixes and updates. -----BEGIN PGP SIGNATURE----- iQFDBAABCAAtFiEEIw+MvkEiF49krdp9F0NaE2wMflgFAmSbC9wPHGNvcmJldEBs d24ubmV0AAoJEBdDWhNsDH5Yw7YH/Rcd2oVQ/B8ui9TYcXTQid0ly5GvLl/ot0zf pml725bZSKodcdtmLvQ6CzMGRdzxhQpVfzy21zHAlQWiBMdheWeu0Etmpspn8fCI wnJIlUbGdp5Aq4ZtoJPTtE3vXvWEQ32gVytGjbTVNtSLRLXQ1bc+A/IvmRj3jdkV dwPfN7hPLVhBt5770pHMywlFVBQ9FUjUNC+uX0JkcNZJ3598c4ZzndBEaLdqfPHC DtWucRdnHubTncKECgYbspsfH6zuntFk8FgsD1gZ1K9izMAwVBsKSS+MeOz8oxx8 rPq4Tscqs/9mpist/PqxEu0fvTC3xsyMbxLA4hAORmgpdnbWIaQ= =q2B4 -----END PGP SIGNATURE----- Merge tag 'docs-6.5' of git://git.lwn.net/linux Pull documentation updates from Jonathan Corbet: "It's been a relatively calm cycle in docsland. We do have: - Some initial page-table documentation from Linus (the other Linus) - Regression-handling documentation improvements from Thorsten - Addition of kerneldoc documentation for the ERR_PTR() and related macros from James Seo ... and the usual collection of fixes and updates" * tag 'docs-6.5' of git://git.lwn.net/linux: docs: consolidate storage interfaces Documentation: update git configuration for Link: tag Documentation: KVM: make corrections to vcpu-requests.rst Documentation: KVM: make corrections to ppc-pv.rst Documentation: KVM: make corrections to locking.rst Documentation: KVM: make corrections to halt-polling.rst Documentation: virt: correct location of haltpoll module params Documentation/mm: Initial page table documentation docs: crypto: async-tx-api: fix typo in struct name docs/doc-guide: Clarify how to write tables docs: handling-regressions: rework section about fixing procedures docs: process: fix a typoed cross-reference docs: submitting-patches: Discuss interleaved replies MAINTAINERS: direct process doc changes to a dedicated ML Documentation: core-api: Add error pointer functions to kernel-api err.h: Add missing kerneldocs for error pointer functions Documentation: conf.py: Add __force to c_id_attributes docs: clarify KVM related kernel parameters' descriptions docs: consolidate human interface subsystems docs: admin-guide: Add information about intel_pstate active mode	2023-06-27 11:33:47 -07:00
Jonathan Corbet	e4624435f3	docs: arm64: Move arm64 documentation under Documentation/arch/ ... Architecture-specific documentation is being moved into Documentation/arch/ as a way of cleaning up the top-level documentation directory and making the docs hierarchy more closely match the source hierarchy. Move Documentation/arm64 into arch/ (along with the Chinese equvalent translations) and fix up documentation references. Cc: Will Deacon <will@kernel.org> Cc: Alex Shi <alexs@kernel.org> Cc: Hu Haowen <src.res@email.cn> Cc: Paolo Bonzini <pbonzini@redhat.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Reviewed-by: Yantengsi <siyanteng@loongson.cn> Signed-off-by: Jonathan Corbet <corbet@lwn.net>	2023-06-21 08:51:51 -06:00
Randy Dunlap	6f7f812f54	Documentation: virt: Clean up paravirt_ops doc ... Clarify language. Clean up grammar. Hyphenate some words. Change "low-ops" to "low-level" since "low-ops" isn't defined or even mentioned anywhere else in the kernel source tree. Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Acked-by: Juergen Gross <jgross@suse.com> Link: https://lore.kernel.org/r/20230610054310.6242-1-rdunlap@infradead.org	2023-06-19 12:09:54 +02:00
Randy Dunlap	95b4d47a44	Documentation: KVM: make corrections to vcpu-requests.rst ... Make corrections to punctuation and grammar. Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Sean Christopherson <seanjc@google.com> Cc: Andrew Jones <drjones@redhat.com> Cc: Christoffer Dall <cdall@linaro.org> Cc: kvm@vger.kernel.org Cc: Jonathan Corbet <corbet@lwn.net> Cc: linux-doc@vger.kernel.org Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/20230612030810.23376-5-rdunlap@infradead.org	2023-06-16 08:20:53 -06:00
Randy Dunlap	daa3a39731	Documentation: KVM: make corrections to ppc-pv.rst ... Correct the path of a header file. Change "guest to ... guest" to "guest to ... host" in one place. Hyphenate "32-bit" systems. Add a comma at one parenthetical phrase. Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Sean Christopherson <seanjc@google.com> Cc: kvm@vger.kernel.org Cc: Alexander Graf <agraf@suse.de> Cc: Jonathan Corbet <corbet@lwn.net> Cc: linux-doc@vger.kernel.org Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/20230612030810.23376-4-rdunlap@infradead.org	2023-06-16 08:20:53 -06:00
Randy Dunlap	c37fa9dbb7	Documentation: KVM: make corrections to locking.rst ... Correct grammar and punctuation. Use "read-only" for consistency. Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Cc: Sean Christopherson <seanjc@google.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: kvm@vger.kernel.org Cc: Jonathan Corbet <corbet@lwn.net> Cc: linux-doc@vger.kernel.org Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/20230612030810.23376-3-rdunlap@infradead.org	2023-06-16 08:20:53 -06:00
Randy Dunlap	4c60d49913	Documentation: KVM: make corrections to halt-polling.rst ... Module parameters are in sysfs, not debugfs, so change that. Remove superfluous "that" following "Note:". Hyphenate "system-wide" values. Hyphenate "trade-off". Don't treat "denial of service" as a verb. Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Cc: Suraj Jitindar Singh <sjitindarsingh@gmail.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Sean Christopherson <seanjc@google.com> Cc: kvm@vger.kernel.org Cc: Jonathan Corbet <corbet@lwn.net> Cc: linux-doc@vger.kernel.org Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/20230612030810.23376-2-rdunlap@infradead.org	2023-06-16 08:20:53 -06:00
Randy Dunlap	1954d51592	Documentation: virt: correct location of haltpoll module params ... Module parameters are located in sysfs, not debugfs, so correct the statement. Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Cc: Marcelo Tosatti <mtosatti@redhat.com> Cc: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com> Link: https://lore.kernel.org/r/20230610054302.6223-1-rdunlap@infradead.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>	2023-06-16 08:17:21 -06:00
Binbin Wu	06b66e0500	KVM: x86: Fix a typo in Documentation/virt/kvm/x86/mmu.rst ... L1 CR4.LA57 should be '0' instead of '1' when shadowing 5-level NPT for 4-level NPT L1 guest. Signed-off-by: Binbin Wu <binbin.wu@linux.intel.com> Link: https://lore.kernel.org/r/20230518091339.1102-4-binbin.wu@linux.intel.com Signed-off-by: Sean Christopherson <seanjc@google.com>	2023-06-05 13:07:21 -07:00
Ricardo Koller	2f440b72e8	KVM: arm64: Add KVM_CAP_ARM_EAGER_SPLIT_CHUNK_SIZE ... Add a capability for userspace to specify the eager split chunk size. The chunk size specifies how many pages to break at a time, using a single allocation. Bigger the chunk size, more pages need to be allocated ahead of time. Suggested-by: Oliver Upton <oliver.upton@linux.dev> Signed-off-by: Ricardo Koller <ricarkol@google.com> Reviewed-by: Gavin Shan <gshan@redhat.com> Link: https://lore.kernel.org/r/20230426172330.1439644-6-ricarkol@google.com Signed-off-by: Oliver Upton <oliver.upton@linux.dev>	2023-05-16 17:39:18 +00:00
Linus Torvalds	7df047b3f0	VFIO updates for v6.4-rc1 ... - Expose and allow R/W access to the PCIe DVSEC capability through vfio-pci, as we already do with the legacy vendor capability. (K V P Satyanarayana) - Fix kernel-doc issues with structure definitions. (Simon Horman) - Clarify ordering of operations relative to the kvm-vfio device for driver dependencies against the kvm pointer. (Yi Liu) -----BEGIN PGP SIGNATURE----- iQJPBAABCAA5FiEEQvbATlQL0amee4qQI5ubbjuwiyIFAmRRPjAbHGFsZXgud2ls bGlhbXNvbkByZWRoYXQuY29tAAoJECObm247sIsiePoQAJkUBO4bN3BvTG3iOkh1 vGrD3llhoUeD3AetT+5Y7pX0ml6wx9SLjcuFIUyYDMomLebpFXQAlI3gjE5eGbnf PVfn6zJDrcA5w2tFwkJHUnN+RgcaPW5tiviP6XkRFpS95HCQRsFdp9GhI2U3X7q7 1G1pTV4Fb6BPhU0zAOueW1HKovTFDi3qbzaG5JjosdZc8V32/USQ6ekkXSGMbuzN HsqLi2ujrtwAYluNKGxsuiDKXBFT8z8Mji7S9Z8RqoR0IF9q8JMUC0UMImn/XhKN 4XgCsibPt4o+RSStAf3vUPoP1l3I5J+3dE4ynLiHN8mNmbJ2gCLzQx18Dfww3V9n Ao8wdwZvvskfc+gkEJAh47OFf9GvCvvHtg3uZS9KPDidS3uY8K4ooIr4Pv1F+QMh rcnjZRFCakPB2tijmtg+1/0dY5/YEAn0mYWQ8ph5Ips36q30WBrbhBLJ47wE6PZ0 bsChcCU+4wK9e20lzMewa9QYnrRkvjGbmIo3GnjyPt4aG0VM08orIePy7ZVen3S3 +ieXBbuW61BLN/fZBFrDB4IxmekWq2TkkxSQCe8rn+jgs7qUUlFzn34Iqna6QTQV pG+O3pyflULZGZHkij4lOn1i2SqqbLxZofYose9hHq5r6ALD5EFNg3QVLuiAc7Tb 3ctmfePHowrzKMyHMlXb8DE7 =Ylh5 -----END PGP SIGNATURE----- Merge tag 'vfio-v6.4-rc1' of https://github.com/awilliam/linux-vfio Pull VFIO updates from Alex Williamson: - Expose and allow R/W access to the PCIe DVSEC capability through vfio-pci, as we already do with the legacy vendor capability (K V P Satyanarayana) - Fix kernel-doc issues with structure definitions (Simon Horman) - Clarify ordering of operations relative to the kvm-vfio device for driver dependencies against the kvm pointer (Yi Liu) * tag 'vfio-v6.4-rc1' of https://github.com/awilliam/linux-vfio: docs: kvm: vfio: Suggest KVM_DEV_VFIO_GROUP_ADD vs VFIO_GROUP_GET_DEVICE_FD ordering vfio: correct kdoc for ops structures vfio/pci: Add DVSEC PCI Extended Config Capability to user visible list.	2023-05-02 11:56:43 -07:00
Linus Torvalds	c8c655c34e	s390: ... * More phys_to_virt conversions * Improvement of AP management for VSIE (nested virtualization) ARM64: * Numerous fixes for the pathological lock inversion issue that plagued KVM/arm64 since... forever. * New framework allowing SMCCC-compliant hypercalls to be forwarded to userspace, hopefully paving the way for some more features being moved to VMMs rather than be implemented in the kernel. * Large rework of the timer code to allow a VM-wide offset to be applied to both virtual and physical counters as well as a per-timer, per-vcpu offset that complements the global one. This last part allows the NV timer code to be implemented on top. * A small set of fixes to make sure that we don't change anything affecting the EL1&0 translation regime just after having having taken an exception to EL2 until we have executed a DSB. This ensures that speculative walks started in EL1&0 have completed. * The usual selftest fixes and improvements. KVM x86 changes for 6.4: * Optimize CR0.WP toggling by avoiding an MMU reload when TDP is enabled, and by giving the guest control of CR0.WP when EPT is enabled on VMX (VMX-only because SVM doesn't support per-bit controls) * Add CR0/CR4 helpers to query single bits, and clean up related code where KVM was interpreting kvm_read_cr4_bits()'s "unsigned long" return as a bool * Move AMD_PSFD to cpufeatures.h and purge KVM's definition * Avoid unnecessary writes+flushes when the guest is only adding new PTEs * Overhaul .sync_page() and .invlpg() to utilize .sync_page()'s optimizations when emulating invalidations * Clean up the range-based flushing APIs * Revamp the TDP MMU's reaping of Accessed/Dirty bits to clear a single A/D bit using a LOCK AND instead of XCHG, and skip all of the "handle changed SPTE" overhead associated with writing the entire entry * Track the number of "tail" entries in a pte_list_desc to avoid having to walk (potentially) all descriptors during insertion and deletion, which gets quite expensive if the guest is spamming fork() * Disallow virtualizing legacy LBRs if architectural LBRs are available, the two are mutually exclusive in hardware * Disallow writes to immutable feature MSRs (notably PERF_CAPABILITIES) after KVM_RUN, similar to CPUID features * Overhaul the vmx_pmu_caps selftest to better validate PERF_CAPABILITIES * Apply PMU filters to emulated events and add test coverage to the pmu_event_filter selftest x86 AMD: * Add support for virtual NMIs * Fixes for edge cases related to virtual interrupts x86 Intel: * Don't advertise XTILE_CFG in KVM_GET_SUPPORTED_CPUID if XTILE_DATA is not being reported due to userspace not opting in via prctl() * Fix a bug in emulation of ENCLS in compatibility mode * Allow emulation of NOP and PAUSE for L2 * AMX selftests improvements * Misc cleanups MIPS: * Constify MIPS's internal callbacks (a leftover from the hardware enabling rework that landed in 6.3) Generic: * Drop unnecessary casts from "void *" throughout kvm_main.c * Tweak the layout of "struct kvm_mmu_memory_cache" to shrink the struct size by 8 bytes on 64-bit kernels by utilizing a padding hole Documentation: * Fix goof introduced by the conversion to rST -----BEGIN PGP SIGNATURE----- iQFIBAABCAAyFiEE8TM4V0tmI4mGbHaCv/vSX3jHroMFAmRNExkUHHBib256aW5p QHJlZGhhdC5jb20ACgkQv/vSX3jHroNyjwf+MkzDael9y9AsOZoqhEZ5OsfQYJ32 Im5ZVYsPRU2K5TuoWql6meIihgclCj1iIU32qYHa2F1WYt2rZ72rJp+HoY8b+TaI WvF0pvNtqQyg3iEKUBKPA4xQ6mj7RpQBw86qqiCHmlfNt0zxluEGEPxH8xrWcfhC huDQ+NUOdU7fmJ3rqGitCvkUbCuZNkw3aNPR8dhU8RAWrwRzP2hBOmdxIeo81WWY XMEpJSijbGpXL9CvM0Jz9nOuMJwZwCCBGxg1vSQq0xTfLySNMxzvWZC2GFaBjucb j0UOQ7yE0drIZDVhd3sdNslubXXU6FcSEzacGQb9aigMUon3Tem9SHi7Kw== =S2Hq -----END PGP SIGNATURE----- Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm Pull kvm updates from Paolo Bonzini: "s390: - More phys_to_virt conversions - Improvement of AP management for VSIE (nested virtualization) ARM64: - Numerous fixes for the pathological lock inversion issue that plagued KVM/arm64 since... forever. - New framework allowing SMCCC-compliant hypercalls to be forwarded to userspace, hopefully paving the way for some more features being moved to VMMs rather than be implemented in the kernel. - Large rework of the timer code to allow a VM-wide offset to be applied to both virtual and physical counters as well as a per-timer, per-vcpu offset that complements the global one. This last part allows the NV timer code to be implemented on top. - A small set of fixes to make sure that we don't change anything affecting the EL1&0 translation regime just after having having taken an exception to EL2 until we have executed a DSB. This ensures that speculative walks started in EL1&0 have completed. - The usual selftest fixes and improvements. x86: - Optimize CR0.WP toggling by avoiding an MMU reload when TDP is enabled, and by giving the guest control of CR0.WP when EPT is enabled on VMX (VMX-only because SVM doesn't support per-bit controls) - Add CR0/CR4 helpers to query single bits, and clean up related code where KVM was interpreting kvm_read_cr4_bits()'s "unsigned long" return as a bool - Move AMD_PSFD to cpufeatures.h and purge KVM's definition - Avoid unnecessary writes+flushes when the guest is only adding new PTEs - Overhaul .sync_page() and .invlpg() to utilize .sync_page()'s optimizations when emulating invalidations - Clean up the range-based flushing APIs - Revamp the TDP MMU's reaping of Accessed/Dirty bits to clear a single A/D bit using a LOCK AND instead of XCHG, and skip all of the "handle changed SPTE" overhead associated with writing the entire entry - Track the number of "tail" entries in a pte_list_desc to avoid having to walk (potentially) all descriptors during insertion and deletion, which gets quite expensive if the guest is spamming fork() - Disallow virtualizing legacy LBRs if architectural LBRs are available, the two are mutually exclusive in hardware - Disallow writes to immutable feature MSRs (notably PERF_CAPABILITIES) after KVM_RUN, similar to CPUID features - Overhaul the vmx_pmu_caps selftest to better validate PERF_CAPABILITIES - Apply PMU filters to emulated events and add test coverage to the pmu_event_filter selftest - AMD SVM: - Add support for virtual NMIs - Fixes for edge cases related to virtual interrupts - Intel AMX: - Don't advertise XTILE_CFG in KVM_GET_SUPPORTED_CPUID if XTILE_DATA is not being reported due to userspace not opting in via prctl() - Fix a bug in emulation of ENCLS in compatibility mode - Allow emulation of NOP and PAUSE for L2 - AMX selftests improvements - Misc cleanups MIPS: - Constify MIPS's internal callbacks (a leftover from the hardware enabling rework that landed in 6.3) Generic: - Drop unnecessary casts from "void *" throughout kvm_main.c - Tweak the layout of "struct kvm_mmu_memory_cache" to shrink the struct size by 8 bytes on 64-bit kernels by utilizing a padding hole Documentation: - Fix goof introduced by the conversion to rST" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (211 commits) KVM: s390: pci: fix virtual-physical confusion on module unload/load KVM: s390: vsie: clarifications on setting the APCB KVM: s390: interrupt: fix virtual-physical confusion for next alert GISA KVM: arm64: Have kvm_psci_vcpu_on() use WRITE_ONCE() to update mp_state KVM: arm64: Acquire mp_state_lock in kvm_arch_vcpu_ioctl_vcpu_init() KVM: selftests: Test the PMU event "Instructions retired" KVM: selftests: Copy full counter values from guest in PMU event filter test KVM: selftests: Use error codes to signal errors in PMU event filter test KVM: selftests: Print detailed info in PMU event filter asserts KVM: selftests: Add helpers for PMC asserts in PMU event filter test KVM: selftests: Add a common helper for the PMU event filter guest code KVM: selftests: Fix spelling mistake "perrmited" -> "permitted" KVM: arm64: vhe: Drop extra isb() on guest exit KVM: arm64: vhe: Synchronise with page table walker on MMU update KVM: arm64: pkvm: Document the side effects of kvm_flush_dcache_to_poc() KVM: arm64: nvhe: Synchronise with page table walker on TLBI KVM: arm64: Handle 32bit CNTPCTSS traps KVM: arm64: nvhe: Synchronise with page table walker on vcpu run KVM: arm64: vgic: Don't acquire its_lock before config_lock KVM: selftests: Add test to verify KVM's supported XCR0 ...	2023-05-01 12:06:20 -07:00
Paolo Bonzini	e1a6d5cf10	Common KVM changes for 6.4: ... - Drop unnecessary casts from "void *" throughout kvm_main.c - Tweak the layout of "struct kvm_mmu_memory_cache" to shrink the struct size by 8 bytes on 64-bit kernels by utilizing a padding hole - Fix a documentation format goof that was introduced when the KVM docs were converted to ReST - Constify MIPS's internal callbacks (a leftover from the hardware enabling rework that landed in 6.3) -----BEGIN PGP SIGNATURE----- iQJGBAABCgAwFiEEMHr+pfEFOIzK+KY1YJEiAU0MEvkFAmRGrVkSHHNlYW5qY0Bn b29nbGUuY29tAAoJEGCRIgFNDBL52ZAP/0/6KOa6ZSvkRh+7MwQDkfeXkkbRIyyY ItPspXCqCmD9X79m2r/5PCfpLgWDizROzOxLXb2bMhh7DqPczWWMvwEfZxBRK9LN 5zpHRdiiJJLR0HMdQtWkM5tdDCw/v37aQPkWyaZC/zDi2Zv6YPtPJVEBd38Squoh vJ8zQp3c1qxHJWKvNaS6JY7NQ1B1sI3e7H9VEldR2d3RAinuAnIMgi+I8WqU6RT1 IdIYkemKrgquO9OPGeBxMV4ri5Km9FBdzb8LRkzzfYaELzVsrRxhXBOc9zaasgYK YVbJSINeq5dIpwoXI9tqDBJTUIAPJ3NOwK/4E6qc6YEIZoT7euKGgGAqI879TSKm zNR8b1ijVu5DquJbDFP8AR2UZnqCEIQ/EuuJdkHxFE5wQnNjgNJtSHZVJX/cKqW9 wnXCqK6wQoAUq7pUgyqTsy3SCiRQddEtwsMcf/CdWRPXcgDqQ1P3UmVupLcEtL0I B+I7S+L64/KOHGeQsEKrohAOFBsMFVEkSkthyflg6/RFv1heHo2lx3njFKYm9lCW LDCd70+iHD8e5/X4RCWAjB0EaqM3MYpAU2UtD8Pbjx/DiZDLWEjDD0B2LkI0uinS +Ebdc5M9zGrNawiAzvF+MhZfDWut4Cr0tS5cPttXX3lg8aPl3nZL2G3nlk4vgpec jgNvjwQ5hUyv =Qw05 -----END PGP SIGNATURE----- Merge tag 'kvm-x86-generic-6.4' of https://github.com/kvm-x86/linux into HEAD Common KVM changes for 6.4: - Drop unnecessary casts from "void *" throughout kvm_main.c - Tweak the layout of "struct kvm_mmu_memory_cache" to shrink the struct size by 8 bytes on 64-bit kernels by utilizing a padding hole - Fix a documentation format goof that was introduced when the KVM docs were converted to ReST - Constify MIPS's internal callbacks (a leftover from the hardware enabling rework that landed in 6.3)	2023-04-26 15:48:44 -04:00
Paolo Bonzini	4f382a79a6	KVM/arm64 updates for 6.4 ... - Numerous fixes for the pathological lock inversion issue that plagued KVM/arm64 since... forever. - New framework allowing SMCCC-compliant hypercalls to be forwarded to userspace, hopefully paving the way for some more features being moved to VMMs rather than be implemented in the kernel. - Large rework of the timer code to allow a VM-wide offset to be applied to both virtual and physical counters as well as a per-timer, per-vcpu offset that complements the global one. This last part allows the NV timer code to be implemented on top. - A small set of fixes to make sure that we don't change anything affecting the EL1&0 translation regime just after having having taken an exception to EL2 until we have executed a DSB. This ensures that speculative walks started in EL1&0 have completed. - The usual selftest fixes and improvements. -----BEGIN PGP SIGNATURE----- iQJDBAABCgAtFiEEn9UcU+C1Yxj9lZw9I9DQutE9ekMFAmRCZIwPHG1hekBrZXJu ZWwub3JnAAoJECPQ0LrRPXpDoZ8P/ioXAdDbAE4hTuyD2YdKJ3IGWN3pg52Z7xc2 rBXXFrbK9+n9FEc3AVdHoGsRPDP0Ynl+apj+aB0Klr/Fl0KKqac+W0ARX9rn1mI1 HjeygFPaGnXjMUp0BjeSLS+g3b0gebELJ6R1QEe1/MIPb8Se7M1y3ZpMWdhe0PPL vyzw3LZq2OAlLgWKZhAfhh03qdr2kqJxypYs6nMrcexfn8dXT78dsYKW1nXmqKcE 61Gg23MDPUoexYpUhm+ym5t8hltoI1di8faPmxEpaFzpSDyAg8V5vo6LiW9jn3cf RX0Sikk1laiRAhVbbIFCKC148vFyKxum3scpKyb91Qc+sK1kmIcxvEqlc6SfG9je +5ndZwAfXtW6SMSOyX8y5fXbee7M0sx3n3le9BNgwXfmLWg/GHXJ544dJgVIlf/e 0Z+8QnP1IUDfARR/b2FlW7A7XLzNHQzO379ekcAdUptbGwlS9CrW6SJ83QR7K6fB bh0aSSELKsD7pX8wnNyNACvmz2zL12ITlDKdZWUr8MSxyTjgVy7s0BDsQT3sbrA1 1sH++RvUWfC2k7tVT3vjZFzUDlPw3bnZmo5YMWRTMbXEdr1V5rDw5F5IXit13KeT 8bk0hnJgnLmyoX2A17v5dkFMIKD7p13tqDRdfFcn0ru63HIKxgkS3ITkDmsAQELK DHT7RBE0 =Bhta -----END PGP SIGNATURE----- Merge tag 'kvmarm-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD KVM/arm64 updates for 6.4 - Numerous fixes for the pathological lock inversion issue that plagued KVM/arm64 since... forever. - New framework allowing SMCCC-compliant hypercalls to be forwarded to userspace, hopefully paving the way for some more features being moved to VMMs rather than be implemented in the kernel. - Large rework of the timer code to allow a VM-wide offset to be applied to both virtual and physical counters as well as a per-timer, per-vcpu offset that complements the global one. This last part allows the NV timer code to be implemented on top. - A small set of fixes to make sure that we don't change anything affecting the EL1&0 translation regime just after having having taken an exception to EL2 until we have executed a DSB. This ensures that speculative walks started in EL1&0 have completed. - The usual selftest fixes and improvements.	2023-04-26 15:46:52 -04:00
Linus Torvalds	bc1bb2a49b	- Add the necessary glue so that the kernel can run as a confidential ... SEV-SNP vTOM guest on Hyper-V. A vTOM guest basically splits the address space in two parts: encrypted and unencrypted. The use case being running unmodified guests on the Hyper-V confidential computing hypervisor - Double-buffer messages between the guest and the hardware PSP device so that no partial buffers are copied back'n'forth and thus potential message integrity and leak attacks are possible - Name the return value the sev-guest driver returns when the hw PSP device hasn't been called, explicitly - Cleanups -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEzv7L6UO9uDPlPSfHEsHwGGHeVUoFAmRGl8gACgkQEsHwGGHe VUoEDhAAiw4+2nZR7XUJ7pewlXG7AJJZsVIpzzcF6Gyymn0LFCyMnP7O3snmFqzz aik0q2LzWrmDQ3Nmmzul0wtdsuW7Nik6BP9oF3WnB911+gGbpXyNWZ8EhOPNzkUR 9D8Sp6f0xmqNE3YuzEpanufiDswgUxi++DRdmIRAs1TTh4bfUFWZcib1pdwoqSmR oS3UfVwVZ4Ee2Qm1f3n3XQ0FUpsjWeARPExUkLEvd8XeonTP+6aGAdggg9MnPcsl 3zpSmOpuZ6VQbDrHxo3BH9HFuIUOd6S9PO++b9F6WxNPGEMk7fHa7ahOA6HjhgVz 5Da3BN16OS9j64cZsYHMPsBcd+ja1YmvvZGypsY0d6X4d3M1zTPW+XeLbyb+VFBy SvA7z+JuxtLKVpju65sNiJWw8ZDTSu+eEYNDeeGLvAj3bxtclJjcPdMEPdzxmC5K eAhmRmiFuVM4nXMAR6cspVTsxvlTHFtd5gdm6RlRnvd7aV77Zl1CLzTy8IHTVpvI t7XTbtjEjYc0pI6cXXptHEOnBLjXUMPcqgGFgJYEauH6EvrxoWszUZD0tS3Hw80A K+Rwnc70ubq/PsgZcF4Ayer1j49z1NPfk5D4EA7/ChN6iNhQA8OqHT1UBrHAgqls 2UAwzE2sQZnjDvGZghlOtFIQUIhwue7m93DaRi19EOdKYxVjV6U= =ZAw9 -----END PGP SIGNATURE----- Merge tag 'x86_sev_for_v6.4_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 SEV updates from Borislav Petkov: - Add the necessary glue so that the kernel can run as a confidential SEV-SNP vTOM guest on Hyper-V. A vTOM guest basically splits the address space in two parts: encrypted and unencrypted. The use case being running unmodified guests on the Hyper-V confidential computing hypervisor - Double-buffer messages between the guest and the hardware PSP device so that no partial buffers are copied back'n'forth and thus potential message integrity and leak attacks are possible - Name the return value the sev-guest driver returns when the hw PSP device hasn't been called, explicitly - Cleanups * tag 'x86_sev_for_v6.4_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/hyperv: Change vTOM handling to use standard coco mechanisms init: Call mem_encrypt_init() after Hyper-V hypercall init is done x86/mm: Handle decryption/re-encryption of bss_decrypted consistently Drivers: hv: Explicitly request decrypted in vmap_pfn() calls x86/hyperv: Reorder code to facilitate future work x86/ioremap: Add hypervisor callback for private MMIO mapping in coco VM x86/sev: Change snp_guest_issue_request()'s fw_err argument virt/coco/sev-guest: Double-buffer messages crypto: ccp: Get rid of __sev_platform_init_locked()'s local function pointer crypto: ccp - Name -1 return value as SEV_RET_NO_FW_CALL	2023-04-25 10:48:08 -07:00
Linus Torvalds	c23f28975a	Commit volume in documentation is relatively low this time, but there is ... still a fair amount going on, including: - Reorganizing the architecture-specific documentation under Documentation/arch. This makes the structure match the source directory and helps to clean up the mess that is the top-level Documentation directory a bit. This work creates the new directory and moves x86 and most of the less-active architectures there. The current plan is to move the rest of the architectures in 6.5, with the patches going through the appropriate subsystem trees. - Some more Spanish translations and maintenance of the Italian translation. - A new "Kernel contribution maturity model" document from Ted. - A new tutorial on quickly building a trimmed kernel from Thorsten. Plus the usual set of updates and fixes. -----BEGIN PGP SIGNATURE----- iQFDBAABCAAtFiEEIw+MvkEiF49krdp9F0NaE2wMflgFAmRGze0PHGNvcmJldEBs d24ubmV0AAoJEBdDWhNsDH5Y/VsH/RyWqinorRVFZmHqRJMRhR0j7hE2pAgK5prE dGXYVtHHNQ+25thNaqhZTOLYFbSX6ii2NG7sLRXmyOTGIZrhUCFFXCHkuq4ZUypR gJpMUiKQVT4dhln3gIZ0k09NSr60gz8UTcq895N9UFpUdY1SCDhbCcLc4uXTRajq NrdgFaHWRkPb+gBRbXOExYm75DmCC6Ny5AyGo2rXfItV//ETjWIJVQpJhlxKrpMZ 3LgpdYSLhEFFnFGnXJ+EAPJ7gXDi2Tg5DuPbkvJyFOTouF3j4h8lSS9l+refMljN xNRessv+boge/JAQidS6u8F2m2ESSqSxisv/0irgtKIMJwXaoX4= =1//8 -----END PGP SIGNATURE----- Merge tag 'docs-6.4' of git://git.lwn.net/linux Pull documentation updates from Jonathan Corbet: "Commit volume in documentation is relatively low this time, but there is still a fair amount going on, including: - Reorganize the architecture-specific documentation under Documentation/arch This makes the structure match the source directory and helps to clean up the mess that is the top-level Documentation directory a bit. This work creates the new directory and moves x86 and most of the less-active architectures there. The current plan is to move the rest of the architectures in 6.5, with the patches going through the appropriate subsystem trees. - Some more Spanish translations and maintenance of the Italian translation - A new "Kernel contribution maturity model" document from Ted - A new tutorial on quickly building a trimmed kernel from Thorsten Plus the usual set of updates and fixes" * tag 'docs-6.4' of git://git.lwn.net/linux: (47 commits) media: Adjust column width for pdfdocs media: Fix building pdfdocs docs: clk: add documentation to log which clocks have been disabled docs: trace: Fix typo in ftrace.rst Documentation/process: always CC responsible lists docs: kmemleak: adjust to config renaming ELF: document some de-facto PT_* ABI quirks Documentation: arm: remove stih415/stih416 related entries docs: turn off "smart quotes" in the HTML build Documentation: firmware: Clarify firmware path usage docs/mm: Physical Memory: Fix grammar Documentation: Add document for false sharing dma-api-howto: typo fix docs: move m68k architecture documentation under Documentation/arch/ docs: move parisc documentation under Documentation/arch/ docs: move ia64 architecture docs under Documentation/arch/ docs: Move arc architecture docs under Documentation/arch/ docs: move nios2 documentation under Documentation/arch/ docs: move openrisc documentation under Documentation/arch/ docs: move superh documentation under Documentation/arch/ ...	2023-04-24 12:35:49 -07:00
Yi Liu	705b004ee3	docs: kvm: vfio: Suggest KVM_DEV_VFIO_GROUP_ADD vs VFIO_GROUP_GET_DEVICE_FD ordering ... as some vfio_device's open_device op requires kvm pointer and kvm pointer set is part of GROUP_ADD. Reviewed-by: Kevin Tian <kevin.tian@intel.com> Signed-off-by: Yi Liu <yi.l.liu@intel.com> Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> Link: https://lore.kernel.org/r/20230421053611.55839-1-yi.l.liu@intel.com Signed-off-by: Alex Williamson <alex.williamson@redhat.com>	2023-04-21 13:48:44 -06:00
Marc Zyngier	6dcf7316e0	Merge branch kvm-arm64/smccc-filtering into kvmarm-master/next ... * kvm-arm64/smccc-filtering: : . : SMCCC call filtering and forwarding to userspace, courtesy of : Oliver Upton. From the cover letter: : : "The Arm SMCCC is rather prescriptive in regards to the allocation of : SMCCC function ID ranges. Many of the hypercall ranges have an : associated specification from Arm (FF-A, PSCI, SDEI, etc.) with some : room for vendor-specific implementations. : : The ever-expanding SMCCC surface leaves a lot of work within KVM for : providing new features. Furthermore, KVM implements its own : vendor-specific ABI, with little room for other implementations (like : Hyper-V, for example). Rather than cramming it all into the kernel we : should provide a way for userspace to handle hypercalls." : . KVM: selftests: Fix spelling mistake "KVM_HYPERCAL_EXIT_SMC" -> "KVM_HYPERCALL_EXIT_SMC" KVM: arm64: Test that SMC64 arch calls are reserved KVM: arm64: Prevent userspace from handling SMC64 arch range KVM: arm64: Expose SMC/HVC width to userspace KVM: selftests: Add test for SMCCC filter KVM: selftests: Add a helper for SMCCC calls with SMC instruction KVM: arm64: Let errors from SMCCC emulation to reach userspace KVM: arm64: Return NOT_SUPPORTED to guest for unknown PSCI version KVM: arm64: Introduce support for userspace SMCCC filtering KVM: arm64: Add support for KVM_EXIT_HYPERCALL KVM: arm64: Use a maple tree to represent the SMCCC filter KVM: arm64: Refactor hvc filtering to support different actions KVM: arm64: Start handling SMCs from EL1 KVM: arm64: Rename SMC/HVC call handler to reflect reality KVM: arm64: Add vm fd device attribute accessors KVM: arm64: Add a helper to check if a VM has ran once KVM: x86: Redefine 'longmode' as a flag for KVM_EXIT_HYPERCALL Signed-off-by: Marc Zyngier <maz@kernel.org>	2023-04-21 09:44:32 +01:00
Marc Zyngier	0e5c9a9d65	KVM: arm64: Expose SMC/HVC width to userspace ... When returning to userspace to handle a SMCCC call, we consistently set PC to point to the instruction immediately after the HVC/SMC. However, should userspace need to know the exact address of the trapping instruction, it needs to know about the *size* of that instruction. For AArch64, this is pretty easy. For AArch32, this is a bit more funky, as Thumb has 16bit encodings for both HVC and SMC. Expose this to userspace with a new flag that directly derives from ESR_EL2.IL. Also update the documentation to reflect the PC state at the point of exit. Finally, this fixes a small buglet where the hypercall.{args,ret} fields would not be cleared on exit, and could contain some random junk. Reviewed-by: Oliver Upton <oliver.upton@linux.dev> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/86pm8iv8tj.wl-maz@kernel.org	2023-04-05 19:20:23 +01:00
Oliver Upton	821d935c87	KVM: arm64: Introduce support for userspace SMCCC filtering ... As the SMCCC (and related specifications) march towards an 'everything and the kitchen sink' interface for interacting with a system it becomes less likely that KVM will support every related feature. We could do better by letting userspace have a crack at it instead. Allow userspace to define an 'SMCCC filter' that applies to both HVCs and SMCs initiated by the guest. Supporting both conduits with this interface is important for a couple of reasons. Guest SMC usage is table stakes for a nested guest, as HVCs are always taken to the virtual EL2. Additionally, guests may want to interact with a service on the secure side which can now be proxied by userspace. Signed-off-by: Oliver Upton <oliver.upton@linux.dev> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20230404154050.2270077-10-oliver.upton@linux.dev	2023-04-05 12:07:41 +01:00
Oliver Upton	d824dff191	KVM: arm64: Add support for KVM_EXIT_HYPERCALL ... In anticipation of user hypercall filters, add the necessary plumbing to get SMCCC calls out to userspace. Even though the exit structure has space for KVM to pass register arguments, let's just avoid it altogether and let userspace poke at the registers via KVM_GET_ONE_REG. This deliberately stretches the definition of a 'hypercall' to cover SMCs from EL1 in addition to the HVCs we know and love. KVM doesn't support EL1 calls into secure services, but now we can paint that as a userspace problem and be done with it. Finally, we need a flag to let userspace know what conduit instruction was used (i.e. SMC vs. HVC). Signed-off-by: Oliver Upton <oliver.upton@linux.dev> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20230404154050.2270077-9-oliver.upton@linux.dev	2023-04-05 12:07:41 +01:00
Oliver Upton	e65733b5c5	KVM: x86: Redefine 'longmode' as a flag for KVM_EXIT_HYPERCALL ... The 'longmode' field is a bit annoying as it blows an entire __u32 to represent a boolean value. Since other architectures are looking to add support for KVM_EXIT_HYPERCALL, now is probably a good time to clean it up. Redefine the field (and the remaining padding) as a set of flags. Preserve the existing ABI by using bit 0 to indicate if the guest was in long mode and requiring that the remaining 31 bits must be zero. Cc: Paolo Bonzini <pbonzini@redhat.com> Acked-by: Sean Christopherson <seanjc@google.com> Signed-off-by: Oliver Upton <oliver.upton@linux.dev> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20230404154050.2270077-2-oliver.upton@linux.dev	2023-04-05 12:07:41 +01:00
Takahiro Itazuri	fb5015bc8b	docs: kvm: x86: Fix broken field list ... Add a missing ":" to fix a broken field list. Signed-off-by: Takahiro Itazuri <itazur@amazon.com> Fixes: ba7bb663f5 ("KVM: x86: Provide per VM capability for disabling PMU virtualization") Message-Id: <20230331093116.99820-1-itazur@amazon.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>	2023-04-04 13:22:05 -04:00
Jonathan Corbet	ff61f0791c	docs: move x86 documentation into Documentation/arch/ ... Move the x86 documentation under Documentation/arch/ as a way of cleaning up the top-level directory and making the structure of our docs more closely match the structure of the source directories it describes. All in-kernel references to the old paths have been updated. Acked-by: Dave Hansen <dave.hansen@linux.intel.com> Cc: linux-arch@vger.kernel.org Cc: x86@kernel.org Cc: Borislav Petkov <bp@alien8.de> Cc: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/lkml/20230315211523.108836-1-corbet@lwn.net/ Signed-off-by: Jonathan Corbet <corbet@lwn.net>	2023-03-30 12:58:51 -06:00
Marc Zyngier	1935d34afa	KVM: arm64: Document KVM_ARM_SET_CNT_OFFSETS and co ... Add some basic documentation on the effects of KVM_ARM_SET_CNT_OFFSETS. Reviewed-by: Colton Lewis <coltonlewis@google.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20230330174800.2677007-16-maz@kernel.org	2023-03-30 19:01:10 +01:00
Jun Miao	b0d237087c	KVM: Fix comments that refer to the non-existent install_new_memslots() ... Fix stale comments that were left behind when install_new_memslots() was replaced by kvm_swap_active_memslots() as part of the scalable memslots rework. Fixes: a54d806688 ("KVM: Keep memslots in tree-based structures instead of array-based ones") Signed-off-by: Jun Miao <jun.miao@intel.com> Link: https://lore.kernel.org/r/20230223052851.1054799-1-jun.miao@intel.com Signed-off-by: Sean Christopherson <seanjc@google.com>	2023-03-24 08:20:17 -07:00
Shaoqin Huang	752b8a9b4d	KVM: Add the missed title format ... The 7.18 KVM_CAP_MANUAL_DIRTY_LOG_PROTECT2 now is not a title, make it as a title to keep the format consistent. Signed-off-by: Shaoqin Huang <shahuang@redhat.com> Fixes: 106ee47dc6 ("docs: kvm: Convert api.txt to ReST format") Reviewed-by: Sean Christopherson <seanjc@google.com> Link: https://lore.kernel.org/r/20230220034910.11024-1-shahuang@redhat.com Signed-off-by: Sean Christopherson <seanjc@google.com>	2023-03-23 16:11:22 -07:00
Dionna Glaze	0144e3b85d	x86/sev: Change snp_guest_issue_request()'s fw_err argument ... The GHCB specification declares that the firmware error value for a guest request will be stored in the lower 32 bits of EXIT_INFO_2. The upper 32 bits are for the VMM's own error code. The fw_err argument to snp_guest_issue_request() is thus a misnomer, and callers will need access to all 64 bits. The type of unsigned long also causes problems, since sw_exit_info2 is u64 (unsigned long long) vs the argument's unsigned long*. Change this type for issuing the guest request. Pass the ioctl command struct's error field directly instead of in a local variable, since an incomplete guest request may not set the error code, and uninitialized stack memory would be written back to user space. The firmware might not even be called, so bookend the call with the no firmware call error and clear the error. Since the "fw_err" field is really exitinfo2 split into the upper bits' vmm error code and lower bits' firmware error code, convert the 64 bit value to a union. [ bp: - Massage commit message - adjust code - Fix a build issue as Reported-by: kernel test robot <lkp@intel.com> Link: https://lore.kernel.org/oe-kbuild-all/202303070609.vX6wp2Af-lkp@intel.com - print exitinfo2 in hex Tom: - Correct -EIO exit case. ] Signed-off-by: Dionna Glaze <dionnaglaze@google.com> Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Link: https://lore.kernel.org/r/20230214164638.1189804-5-dionnaglaze@google.com Link: https://lore.kernel.org/r/20230307192449.24732-12-bp@alien8.de	2023-03-21 15:43:19 +01:00
Peter Gonda	efb339a833	crypto: ccp - Name -1 return value as SEV_RET_NO_FW_CALL ... The PSP can return a "firmware error" code of -1 in circumstances where the PSP has not actually been called. To make this protocol unambiguous, name the value SEV_RET_NO_FW_CALL. [ bp: Massage a bit. ] Signed-off-by: Peter Gonda <pgonda@google.com> Signed-off-by: Dionna Glaze <dionnaglaze@google.com> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Link: https://lore.kernel.org/r/20221207010210.2563293-2-dionnaglaze@google.com	2023-03-21 11:37:32 +01:00
Thomas Huth	2def950c63	KVM: arm64: Limit length in kvm_vm_ioctl_mte_copy_tags() to INT_MAX ... In case of success, this function returns the amount of handled bytes. However, this does not work for large values: The function is called from kvm_arch_vm_ioctl() (which still returns a long), which in turn is called from kvm_vm_ioctl() in virt/kvm/kvm_main.c. And that function stores the return value in an "int r" variable. So the upper 32-bits of the "long" return value are lost there. KVM ioctl functions should only return "int" values, so let's limit the amount of bytes that can be requested here to INT_MAX to avoid the problem with the truncated return value. We can then also change the return type of the function to "int" to make it clearer that it is not possible to return a "long" here. Fixes: f0376edb1d ("KVM: arm64: Add ioctl to fetch/store tags in a guest") Signed-off-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Reviewed-by: Gavin Shan <gshan@redhat.com> Reviewed-by: Steven Price <steven.price@arm.com> Message-Id: <20230208140105.655814-5-thuth@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>	2023-03-16 10:18:06 -04:00
Linus Torvalds	49d5759268	ARM: ... - Provide a virtual cache topology to the guest to avoid inconsistencies with migration on heterogenous systems. Non secure software has no practical need to traverse the caches by set/way in the first place. - Add support for taking stage-2 access faults in parallel. This was an accidental omission in the original parallel faults implementation, but should provide a marginal improvement to machines w/o FEAT_HAFDBS (such as hardware from the fruit company). - A preamble to adding support for nested virtualization to KVM, including vEL2 register state, rudimentary nested exception handling and masking unsupported features for nested guests. - Fixes to the PSCI relay that avoid an unexpected host SVE trap when resuming a CPU when running pKVM. - VGIC maintenance interrupt support for the AIC - Improvements to the arch timer emulation, primarily aimed at reducing the trap overhead of running nested. - Add CONFIG_USERFAULTFD to the KVM selftests config fragment in the interest of CI systems. - Avoid VM-wide stop-the-world operations when a vCPU accesses its own redistributor. - Serialize when toggling CPACR_EL1.SMEN to avoid unexpected exceptions in the host. - Aesthetic and comment/kerneldoc fixes - Drop the vestiges of the old Columbia mailing list and add [Oliver] as co-maintainer This also drags in arm64's 'for-next/sme2' branch, because both it and the PSCI relay changes touch the EL2 initialization code. RISC-V: - Fix wrong usage of PGDIR_SIZE instead of PUD_SIZE - Correctly place the guest in S-mode after redirecting a trap to the guest - Redirect illegal instruction traps to guest - SBI PMU support for guest s390: - Two patches sorting out confusion between virtual and physical addresses, which currently are the same on s390. - A new ioctl that performs cmpxchg on guest memory - A few fixes x86: - Change tdp_mmu to a read-only parameter - Separate TDP and shadow MMU page fault paths - Enable Hyper-V invariant TSC control - Fix a variety of APICv and AVIC bugs, some of them real-world, some of them affecting architecurally legal but unlikely to happen in practice - Mark APIC timer as expired if its in one-shot mode and the count underflows while the vCPU task was being migrated - Advertise support for Intel's new fast REP string features - Fix a double-shootdown issue in the emergency reboot code - Ensure GIF=1 and disable SVM during an emergency reboot, i.e. give SVM similar treatment to VMX - Update Xen's TSC info CPUID sub-leaves as appropriate - Add support for Hyper-V's extended hypercalls, where "support" at this point is just forwarding the hypercalls to userspace - Clean up the kvm->lock vs. kvm->srcu sequences when updating the PMU and MSR filters - One-off fixes and cleanups - Fix and cleanup the range-based TLB flushing code, used when KVM is running on Hyper-V - Add support for filtering PMU events using a mask. If userspace wants to restrict heavily what events the guest can use, it can now do so without needing an absurd number of filter entries - Clean up KVM's handling of "PMU MSRs to save", especially when vPMU support is disabled - Add PEBS support for Intel Sapphire Rapids - Fix a mostly benign overflow bug in SEV's send|receive_update_data() - Move several SVM-specific flags into vcpu_svm x86 Intel: - Handle NMI VM-Exits before leaving the noinstr region - A few trivial cleanups in the VM-Enter flows - Stop enabling VMFUNC for L1 purely to document that KVM doesn't support EPTP switching (or any other VM function) for L1 - Fix a crash when using eVMCS's enlighted MSR bitmaps Generic: - Clean up the hardware enable and initialization flow, which was scattered around multiple arch-specific hooks. Instead, just let the arch code call into generic code. Both x86 and ARM should benefit from not having to fight common KVM code's notion of how to do initialization. - Account allocations in generic kvm_arch_alloc_vm() - Fix a memory leak if coalesced MMIO unregistration fails selftests: - On x86, cache the CPU vendor (AMD vs. Intel) and use the info to emit the correct hypercall instruction instead of relying on KVM to patch in VMMCALL - Use TAP interface for kvm_binary_stats_test and tsc_msrs_test -----BEGIN PGP SIGNATURE----- iQFIBAABCAAyFiEE8TM4V0tmI4mGbHaCv/vSX3jHroMFAmP2YA0UHHBib256aW5p QHJlZGhhdC5jb20ACgkQv/vSX3jHroPg/Qf+J6nT+TkIa+8Ei+fN1oMTDp4YuIOx mXvJ9mRK9sQ+tAUVwvDz3qN/fK5mjsYbRHIDlVc5p2Q3bCrVGDDqXPFfCcLx1u+O 9U9xjkO4JxD2LS9pc70FYOyzVNeJ8VMGOBbC2b0lkdYZ4KnUc6e/WWFKJs96bK+H duo+RIVyaMthnvbTwSv1K3qQb61n6lSJXplywS8KWFK6NZAmBiEFDAWGRYQE9lLs VcVcG0iDJNL/BQJ5InKCcvXVGskcCm9erDszPo7w4Bypa4S9AMS42DHUaRZrBJwV /WqdH7ckIz7+OSV0W1j+bKTHAFVTCjXYOM7wQykgjawjICzMSnnG9Gpskw== =goe1 -----END PGP SIGNATURE----- Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm Pull kvm updates from Paolo Bonzini: "ARM: - Provide a virtual cache topology to the guest to avoid inconsistencies with migration on heterogenous systems. Non secure software has no practical need to traverse the caches by set/way in the first place - Add support for taking stage-2 access faults in parallel. This was an accidental omission in the original parallel faults implementation, but should provide a marginal improvement to machines w/o FEAT_HAFDBS (such as hardware from the fruit company) - A preamble to adding support for nested virtualization to KVM, including vEL2 register state, rudimentary nested exception handling and masking unsupported features for nested guests - Fixes to the PSCI relay that avoid an unexpected host SVE trap when resuming a CPU when running pKVM - VGIC maintenance interrupt support for the AIC - Improvements to the arch timer emulation, primarily aimed at reducing the trap overhead of running nested - Add CONFIG_USERFAULTFD to the KVM selftests config fragment in the interest of CI systems - Avoid VM-wide stop-the-world operations when a vCPU accesses its own redistributor - Serialize when toggling CPACR_EL1.SMEN to avoid unexpected exceptions in the host - Aesthetic and comment/kerneldoc fixes - Drop the vestiges of the old Columbia mailing list and add [Oliver] as co-maintainer RISC-V: - Fix wrong usage of PGDIR_SIZE instead of PUD_SIZE - Correctly place the guest in S-mode after redirecting a trap to the guest - Redirect illegal instruction traps to guest - SBI PMU support for guest s390: - Sort out confusion between virtual and physical addresses, which currently are the same on s390 - A new ioctl that performs cmpxchg on guest memory - A few fixes x86: - Change tdp_mmu to a read-only parameter - Separate TDP and shadow MMU page fault paths - Enable Hyper-V invariant TSC control - Fix a variety of APICv and AVIC bugs, some of them real-world, some of them affecting architecurally legal but unlikely to happen in practice - Mark APIC timer as expired if its in one-shot mode and the count underflows while the vCPU task was being migrated - Advertise support for Intel's new fast REP string features - Fix a double-shootdown issue in the emergency reboot code - Ensure GIF=1 and disable SVM during an emergency reboot, i.e. give SVM similar treatment to VMX - Update Xen's TSC info CPUID sub-leaves as appropriate - Add support for Hyper-V's extended hypercalls, where "support" at this point is just forwarding the hypercalls to userspace - Clean up the kvm->lock vs. kvm->srcu sequences when updating the PMU and MSR filters - One-off fixes and cleanups - Fix and cleanup the range-based TLB flushing code, used when KVM is running on Hyper-V - Add support for filtering PMU events using a mask. If userspace wants to restrict heavily what events the guest can use, it can now do so without needing an absurd number of filter entries - Clean up KVM's handling of "PMU MSRs to save", especially when vPMU support is disabled - Add PEBS support for Intel Sapphire Rapids - Fix a mostly benign overflow bug in SEV's send|receive_update_data() - Move several SVM-specific flags into vcpu_svm x86 Intel: - Handle NMI VM-Exits before leaving the noinstr region - A few trivial cleanups in the VM-Enter flows - Stop enabling VMFUNC for L1 purely to document that KVM doesn't support EPTP switching (or any other VM function) for L1 - Fix a crash when using eVMCS's enlighted MSR bitmaps Generic: - Clean up the hardware enable and initialization flow, which was scattered around multiple arch-specific hooks. Instead, just let the arch code call into generic code. Both x86 and ARM should benefit from not having to fight common KVM code's notion of how to do initialization - Account allocations in generic kvm_arch_alloc_vm() - Fix a memory leak if coalesced MMIO unregistration fails selftests: - On x86, cache the CPU vendor (AMD vs. Intel) and use the info to emit the correct hypercall instruction instead of relying on KVM to patch in VMMCALL - Use TAP interface for kvm_binary_stats_test and tsc_msrs_test" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (325 commits) KVM: SVM: hyper-v: placate modpost section mismatch error KVM: x86/mmu: Make tdp_mmu_allowed static KVM: arm64: nv: Use reg_to_encoding() to get sysreg ID KVM: arm64: nv: Only toggle cache for virtual EL2 when SCTLR_EL2 changes KVM: arm64: nv: Filter out unsupported features from ID regs KVM: arm64: nv: Emulate EL12 register accesses from the virtual EL2 KVM: arm64: nv: Allow a sysreg to be hidden from userspace only KVM: arm64: nv: Emulate PSTATE.M for a guest hypervisor KVM: arm64: nv: Add accessors for SPSR_EL1, ELR_EL1 and VBAR_EL1 from virtual EL2 KVM: arm64: nv: Handle SMCs taken from virtual EL2 KVM: arm64: nv: Handle trapped ERET from virtual EL2 KVM: arm64: nv: Inject HVC exceptions to the virtual EL2 KVM: arm64: nv: Support virtual EL2 exceptions KVM: arm64: nv: Handle HCR_EL2.NV system register traps KVM: arm64: nv: Add nested virt VCPU primitives for vEL2 VCPU state KVM: arm64: nv: Add EL2 system registers to vcpu context KVM: arm64: nv: Allow userspace to set PSR_MODE_EL2x KVM: arm64: nv: Reset VCPU to EL2 registers if VCPU nested virt is set KVM: arm64: nv: Introduce nested virtualization VCPU feature KVM: arm64: Use the S2 MMU context to iterate over S2 table ...	2023-02-25 11:30:21 -08:00
Linus Torvalds	70756b49be	It has been a moderately calm cycle for documentation; the significant ... changes include: - Some significant additions to the memory-management documentation - Some improvements to navigation in the HTML-rendered docs - More Spanish and Chinese translations ...and the usual set of typo fixes and such. -----BEGIN PGP SIGNATURE----- iQFDBAABCAAtFiEEIw+MvkEiF49krdp9F0NaE2wMflgFAmPzkQUPHGNvcmJldEBs d24ubmV0AAoJEBdDWhNsDH5YC0QH/09u10xV3N+RuveNE/tArVxKcQi7JZd/xugQ toSXygh64WY10lzwi7Ms1bHZzpPYB0fOrqTGNqNQuhrVTjQzaZB0BBJqm8lwt2w/ S/Z5wj+IicJTmQ7+0C2Hc/dcK5SCPfY3CgwqOUVdr3dEm1oU+4QaBy31fuIJJ0Hx NdbXBco8BZqJX9P67jwp9vbrFrSGBjPI0U4HNHVjrWlcBy8JT0aAnf0fyWFy3orA T86EzmEw8drA1mXsHa5pmVwuHDx2X+D+eRurG9llCBrlIG9EDSmnalY4BeGqR4LS oDrEH6M91I5+9iWoJ0rBheD8rPclXO2HpjXLApXzTjrORgEYZsM= =MCdX -----END PGP SIGNATURE----- Merge tag 'docs-6.3' of git://git.lwn.net/linux Pull documentation updates from Jonathan Corbet: "It has been a moderately calm cycle for documentation; the significant changes include: - Some significant additions to the memory-management documentation - Some improvements to navigation in the HTML-rendered docs - More Spanish and Chinese translations ... and the usual set of typo fixes and such" * tag 'docs-6.3' of git://git.lwn.net/linux: (68 commits) Documentation/watchdog/hpwdt: Fix Format Documentation/watchdog/hpwdt: Fix Reference Documentation: core-api: padata: correct spelling docs/mm: Physical Memory: correct spelling in reference to CONFIG_PAGE_EXTENSION docs: Use HTML comments for the kernel-toc SPDX line docs: Add more information to the HTML sidebar Documentation: KVM: Update AMD memory encryption link printk: Document that CONFIG_BOOT_PRINTK_DELAY required for boot_delay= Documentation: userspace-api: correct spelling Documentation: sparc: correct spelling Documentation: driver-api: correct spelling Documentation: admin-guide: correct spelling docs: add workload-tracing document to admin-guide docs/admin-guide/mm: remove useless markup docs/mm: remove useless markup docs/mm: Physical Memory: remove useless markup docs/sp_SP: Add process magic-number translation docs: ftrace: always use canonical ftrace path Doc/damon: fix the data path error dma-buf: Add "dma-buf" to title of documentation ...	2023-02-22 12:00:20 -08:00
Paolo Bonzini	e4922088f8	* Two more V!=R patches ... * The last part of the cmpxchg patches * A few fixes -----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEEwGNS88vfc9+v45Yq41TmuOI4ufgFAmPkwH0ACgkQ41TmuOI4 ufhrshAAmv9OlCNVsGTmQLpEnGdnxGM2vBPDEygdi+oVHtpMBFn27R3fu295aUR0 v0o3xsSImhaOU03OxWrsLqPanEL5BqnicLwkL4xou3NXXD4Wo0Zrstd3ykfaODhq bTDx7zC2zMQ5J+LPuwDaYUat5R0bHv7cULv1CKLdyISnPGafy0kpUPvC30nymJZi nV7/DjvDYbuOFfhdTEOklGRXvMSEBPLGhIJk/cYZzJECNeNJFUeSs+00uNJ8P6WO BQD/FLWie+Fn6lTGIUhulZCPf65KI4bHHLB6WFXA5Jy+O08urdtLiZwlBC4iNsFV NFIwangpJ/RnupJoOMwQfw31op5SZuiOYn91njaGIiLpHgvA9+iaERsqXtjp8NW7 /ne1TZqtrGbYY71XvZ/yPQU5VGc/MG1CyCGX1CPNSQO7v4yl27BNChxdkBHzzm2u C0IuLZuXl25XwAt8xbdi65fb84pJOeWRU4Zoe4cUZ3drBy5cZsmFXe3lhEAqs7nf MB9XekTLpZ6pCqTE1u/BOrobVg5es/lDQiDeLCvDe1I3I5inSD6ehjJz7qjK0w8o 3pn0rb+Kb4Ijzfi4RNbgJXmBNzkwwSSPPwYt4THHOZtr8p0fZMBeGHqq1wTJmKcq M/+9w4cZqgFpdyNqitj8NyTayX1Lj4LWayexCBYaGkLuHTD6cCk= =HOly -----END PGP SIGNATURE----- Merge tag 'kvm-s390-next-6.3-1' of https://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD * Two more V!=R patches * The last part of the cmpxchg patches * A few fixes	2023-02-15 12:35:26 -05:00
Paolo Bonzini	33436335e9	KVM/riscv changes for 6.3 ... - Fix wrong usage of PGDIR_SIZE to check page sizes - Fix privilege mode setting in kvm_riscv_vcpu_trap_redirect() - Redirect illegal instruction traps to guest - SBI PMU support for guest -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEZdn75s5e6LHDQ+f/rUjsVaLHLAcFAmPifFIACgkQrUjsVaLH LAcEyxAAinMBaBhiPmwWZQvcCzh/UFmJo8BQCwAPuwoc/a4ZGAR7ylzd0oJilP8M wSgX6Ad8XF+CEW2VpxW9nwyi41N25ep1Lrf8vOaWy9L9QNUo0t15WrCIbXT2p399 HrK9fz7HHKKIMsJy+rYb9EepdmMf55xtr1Y/EjyvhoDQbrEMlKsAODYz/SUoriQG Tn3cCYBzLdvzDzu0xXM9v+nsetWXdajK/v4je+mE3NQceXhePAO4oVWP4IpnoROd ZQm3evvVdf0WtKG9curxwMB7jjBqDBFrcLYl0qHGa7pi2o5PzVM7esgaV47KwetH IgA/Mrf1IfzpgM7VYDDax5wUHlKj63KisqU0J8rU3PUloQXaWqv7+ho51t9GzZ/i 9x4uyO/evVntgyTw6HCbqmQJDgEtJiG1ydrR/ydBMYHLnh7LPY2UpKgcqmirtbkK 1/DYDp84vikQ5VW1hc8IACdoBShh9Moh4xsEStzkTrIeHcZCjtORXUh8UIPZ0Mu2 7Mnkktu9I55SLwA3rwH/EYT1ISrOV1G+q3wfqgeLpn8YUWwCIiqWQ5Ur0/WSMJse uJ3HedZDzj9T4n4khX+mKEYh6joAafQZag+4TID2lRSwd0S/mpeC22hYrViMdDmq yhE+JNin/sz4AVaHNzGwfqk2NC2RFl9aRn2X0xTwyBubif9pKMQ= =spUL -----END PGP SIGNATURE----- Merge tag 'kvm-riscv-6.3-1' of https://github.com/kvm-riscv/linux into HEAD KVM/riscv changes for 6.3 - Fix wrong usage of PGDIR_SIZE to check page sizes - Fix privilege mode setting in kvm_riscv_vcpu_trap_redirect() - Redirect illegal instruction traps to guest - SBI PMU support for guest	2023-02-15 12:33:28 -05:00
Janis Schoetterl-Glausch	a7b0417328	Documentation: KVM: s390: Describe KVM_S390_MEMOP_F_CMPXCHG ... Describe the semantics of the new KVM_S390_MEMOP_F_CMPXCHG flag for absolute vm write memops which allows user space to perform (storage key checked) cmpxchg operations on guest memory. Signed-off-by: Janis Schoetterl-Glausch <scgl@linux.ibm.com> Reviewed-by: Janosch Frank <frankja@linux.ibm.com> Link: https://lore.kernel.org/r/20230206164602.138068-14-scgl@linux.ibm.com Message-Id: <20230206164602.138068-14-scgl@linux.ibm.com> [frankja@de.ibm.com: Removed a line from an earlier version] Signed-off-by: Janosch Frank <frankja@linux.ibm.com>	2023-02-07 18:06:00 +01:00
Nico Boehr	f2d3155e2a	KVM: s390: disable migration mode when dirty tracking is disabled ... Migration mode is a VM attribute which enables tracking of changes in storage attributes (PGSTE). It assumes dirty tracking is enabled on all memslots to keep a dirty bitmap of pages with changed storage attributes. When enabling migration mode, we currently check that dirty tracking is enabled for all memslots. However, userspace can disable dirty tracking without disabling migration mode. Since migration mode is pointless with dirty tracking disabled, disable migration mode whenever userspace disables dirty tracking on any slot. Also update the documentation to clarify that dirty tracking must be enabled when enabling migration mode, which is already enforced by the code in kvm_s390_vm_start_migration(). Also highlight in the documentation for KVM_S390_GET_CMMA_BITS that it can now fail with -EINVAL when dirty tracking is disabled while migration mode is on. Move all the error codes to a table so this stays readable. To disable migration mode, slots_lock should be held, which is taken in kvm_set_memory_region() and thus held in kvm_arch_prepare_memory_region(). Restructure the prepare code a bit so all the sanity checking is done before disabling migration mode. This ensures migration mode isn't disabled when some sanity check fails. Cc: stable@vger.kernel.org Fixes: 190df4a212 ("KVM: s390: CMMA tracking, ESSA emulation, migration mode") Signed-off-by: Nico Boehr <nrb@linux.ibm.com> Reviewed-by: Janosch Frank <frankja@linux.ibm.com> Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com> Link: https://lore.kernel.org/r/20230127140532.230651-2-nrb@linux.ibm.com Message-Id: <20230127140532.230651-2-nrb@linux.ibm.com> [frankja@linux.ibm.com: fixed commit message typo, moved api.rst error table upwards] Signed-off-by: Janosch Frank <frankja@linux.ibm.com>	2023-02-07 18:05:59 +01:00
Paolo Bonzini	25b72cf7da	KVM/arm64 fixes for 6.2, take #3 ... - Yet another fix for non-CPU accesses to the memory backing the VGICv3 subsystem - A set of fixes for the setlftest checking for the S1PTW behaviour after the fix that went in ealier in the cycle -----BEGIN PGP SIGNATURE----- iQJDBAABCgAtFiEEn9UcU+C1Yxj9lZw9I9DQutE9ekMFAmPWwGEPHG1hekBrZXJu ZWwub3JnAAoJECPQ0LrRPXpDi/wP/3kbZrZ+y/YNcYioQwqibRS5DKuACKXM1dbh sMX0e8t3frmkrfkHZ1FsBNjSWtDLmRbjANNDWi8ypAXaPVm7/0whFqkJgyPWDO+v /1VXYMwMjy2zpWfPGPu+/fQL0Ninp+EfLP3Y2/Lr8VW5rH21bfuQ1rm41ucK/jB5 IsMiQ+YObZUTrSq22fHfNJKc8fysSqeMHW96bl0QnJxf6aDDieZFGF9rlRQf/faq lPux0faasgQC0VgXlokWGdU1x5kXIf3Ta4VtiKARKNwxziuG8B484+5hHXvoBR1h bXFJJUQjQs2qBuH75BJftini9fvWvQPgbk4NvkD1tlyMhlZ5w2MTTKB4QmuW/WDT OGuGXAcuP2stm0dUaSn1aCwzfYgtihssp+RCAB5DOoL64i/CtHl+FJgz8wZfDPRk UNXdK2JccDfD6bGv/kQqPJoozjI5e8Ha2ks1O4IPHIDpIsVMIWRRGULgIRvLaHaS iaR7Vx+XgzW50Knj++S85eak/aTSkVaykYZIiiB4DTai1/XuAZfMA79X6IvQLxHq 419FHmXwhJmYdWZ/JFBXWnbR6wRJiv4TR23A5u8X6o/YgBn6fmwAt6o8Avk1quZQ mslRPHG45hM/7Z7uSEsIQnbVVnHPhbaKr3GmHlJJ4zXRI8GaSMe23wpnJdUj1q9a w1Oe0rpq =2l/n -----END PGP SIGNATURE----- Merge tag 'kvmarm-fixes-6.2-3' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD KVM/arm64 fixes for 6.2, take #3 - Yet another fix for non-CPU accesses to the memory backing the VGICv3 subsystem - A set of fixes for the setlftest checking for the S1PTW behaviour after the fix that went in ealier in the cycle	2023-02-04 08:57:43 -05:00
Wyes Karny	fbabc2eaef	Documentation: KVM: Update AMD memory encryption link ... Update AMD memory encryption white-paper document link. Previous link is not available. Update new available link. Signed-off-by: Wyes Karny <wyes.karny@amd.com> Reviewed-by: Carlos Bilbao <carlos.bilbao@amd.com> Link: https://lore.kernel.org/r/20230125175948.21100-1-wyes.karny@amd.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>	2023-02-02 11:32:57 -07:00
Gavin Shan	6028acbe3a	KVM: arm64: Allow no running vcpu on saving vgic3 pending table ... We don't have a running VCPU context to save vgic3 pending table due to KVM_DEV_ARM_VGIC_{GRP_CTRL, SAVE_PENDING_TABLES} command on KVM device "kvm-arm-vgic-v3". The unknown case is caught by kvm-unit-tests. # ./kvm-unit-tests/tests/its-pending-migration WARNING: CPU: 120 PID: 7973 at arch/arm64/kvm/../../../virt/kvm/kvm_main.c:3325 \ mark_page_dirty_in_slot+0x60/0xe0 : mark_page_dirty_in_slot+0x60/0xe0 __kvm_write_guest_page+0xcc/0x100 kvm_write_guest+0x7c/0xb0 vgic_v3_save_pending_tables+0x148/0x2a0 vgic_set_common_attr+0x158/0x240 vgic_v3_set_attr+0x4c/0x5c kvm_device_ioctl+0x100/0x160 __arm64_sys_ioctl+0xa8/0xf0 invoke_syscall.constprop.0+0x7c/0xd0 el0_svc_common.constprop.0+0x144/0x160 do_el0_svc+0x34/0x60 el0_svc+0x3c/0x1a0 el0t_64_sync_handler+0xb4/0x130 el0t_64_sync+0x178/0x17c Use vgic_write_guest_lock() to save vgic3 pending table. Reported-by: Zenghui Yu <yuzenghui@huawei.com> Signed-off-by: Gavin Shan <gshan@redhat.com> Reviewed-by: Oliver Upton <oliver.upton@linux.dev> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20230126235451.469087-5-gshan@redhat.com	2023-01-29 18:46:11 +00:00