According to the SDM, for MSR_IA32_PERFCTR0/1 "the lower-order 32 bits of
each MSR may be written with any value, and the high-order 8 bits are
sign-extended according to the value of bit 31", but the fixed counters
in real hardware are limited to the width of the fixed counters ("bits
beyond the width of the fixed-function counter are reserved and must be
written as zeros"). Fix KVM to do the same.
Reported-by: Nadav Amit <nadav.amit@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This patch will simplify the changes in the next, by enforcing the
masking of the counters to RDPMC and RDMSR.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
After commit:
672ff6cff8 ("KVM: x86: Raise #GP when guest vCPU do not support PMU")
my AMD guests started #GPing like this:
general protection fault: 0000 [#1] PREEMPT SMP
CPU: 1 PID: 4355 Comm: bash Not tainted 5.1.0-rc6+ #3
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:x86_perf_event_update+0x3b/0xa0
with Code: pointing to RDPMC. It is RDPMC because the guest has the
hardware watchdog CONFIG_HARDLOCKUP_DETECTOR_PERF enabled which uses
perf. Instrumenting kvm_pmu_rdpmc() some, showed that it fails due to:
if (!pmu->version)
return 1;
which the above commit added. Since AMD's PMU leaves the version at 0,
that causes the #GP injection into the guest.
Set pmu->version arbitrarily to 1 and move it above the non-applicable
struct kvm_pmu members.
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Janakarajan Natarajan <Janakarajan.Natarajan@amd.com>
Cc: kvm@vger.kernel.org
Cc: Liran Alon <liran.alon@oracle.com>
Cc: Mihai Carabas <mihai.carabas@oracle.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: "Radim Krčmář" <rkrcmar@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: x86@kernel.org
Cc: stable@vger.kernel.org
Fixes: 672ff6cff8 ("KVM: x86: Raise #GP when guest vCPU do not support PMU")
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Userspace can easily set up invalid processor state in such a way that
dmesg will be filled with VMCS or VMCB dumps. Disable this by default
using a module parameter.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
When assigning kvm irqfd we didn't check the irqchip mode but we allow
KVM_IRQFD to succeed with all the irqchip modes. However it does not
make much sense to create irqfd even without the kernel chips. Let's
provide a arch-dependent helper to check whether a specific irqfd is
allowed by the arch. At least for x86, it should make sense to check:
- when irqchip mode is NONE, all irqfds should be disallowed, and,
- when irqchip mode is SPLIT, irqfds that are with resamplefd should
be disallowed.
For either of the case, previously we'll silently ignore the irq or
the irq ack event if the irqchip mode is incorrect. However that can
cause misterious guest behaviors and it can be hard to triage. Let's
fail KVM_IRQFD even earlier to detect these incorrect configurations.
CC: Paolo Bonzini <pbonzini@redhat.com>
CC: Radim Krčmář <rkrcmar@redhat.com>
CC: Alex Williamson <alex.williamson@redhat.com>
CC: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Current logic does not allow VCPU to be loaded onto CPU with
APIC ID 255. This should be allowed since the host physical APIC ID
field in the AVIC Physical APIC table entry is an 8-bit value,
and APIC ID 255 is valid in system with x2APIC enabled.
Instead, do not allow VCPU load if the host APIC ID cannot be
represented by an 8-bit value.
Also, use the more appropriate AVIC_PHYSICAL_ID_ENTRY_HOST_PHYSICAL_ID_MASK
instead of AVIC_MAX_PHYSICAL_ID_COUNT.
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The guest_code of sync_regs_test is assuming that the compiler will not
touch %r11 outside the asm that increments it, which is a bit brittle.
Instead, we can increment a variable and use a dummy asm to ensure the
increment is not optimized away. However, we also need to use a
callee-save register or the compiler will insert a save/restore around
the vmexit, breaking the whole idea behind the test.
(Yes, "if it ain't broken...", but I would like the test to be clean
before it is copied into the upcoming s390 selftests).
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The check for entry->index == 0 is done twice. One time should
be sufficient.
Suggested-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Expose per-vCPU timer_advance_ns to userspace, so it is able to
query the auto-adjusted value.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Sean Christopherson <sean.j.christopherson@intel.com>
Cc: Liran Alon <liran.alon@oracle.com>
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
After commit c3941d9e0 (KVM: lapic: Allow user to disable adaptive tuning of
timer advancement), '-1' enables adaptive tuning starting from default
advancment of 1000ns. However, we should expose an int instead of an overflow
uint module parameter.
Before patch:
/sys/module/kvm/parameters/lapic_timer_advance_ns:4294967295
After patch:
/sys/module/kvm/parameters/lapic_timer_advance_ns:-1
Fixes: c3941d9e0 (KVM: lapic: Allow user to disable adaptive tuning of timer advancement)
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Sean Christopherson <sean.j.christopherson@intel.com>
Cc: Liran Alon <liran.alon@oracle.com>
Reviewed-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
We get a warning when build kernel W=1:
arch/x86/kvm/vmx/vmx.c:6365:6: warning: no previous prototype for ‘vmx_update_host_rsp’ [-Wmissing-prototypes]
void vmx_update_host_rsp(struct vcpu_vmx *vmx, unsigned long host_rsp)
Add the missing declaration to fix this.
Signed-off-by: Yi Wang <wang.yi59@zte.com.cn>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Kvm now supports extended CPUID functions through 0x8000001f. CPUID
leaf 0x8000001e is AMD's Processor Topology Information leaf. This
contains similar information to CPUID leaf 0xb (Intel's Extended
Topology Enumeration leaf), and should be included in the output of
KVM_GET_SUPPORTED_CPUID, even though userspace is likely to override
some of this information based upon the configuration of the
particular VM.
Cc: Brijesh Singh <brijesh.singh@amd.com>
Cc: Borislav Petkov <bp@suse.de>
Fixes: 8765d75329 ("KVM: X86: Extend CPUID range to include new leaf")
Signed-off-by: Jim Mattson <jmattson@google.com>
Reviewed-by: Marc Orr <marcorr@google.com>
Reviewed-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Per the APM, "CPUID Fn8000_001D_E[D,C,B,A]X reports cache topology
information for the cache enumerated by the value passed to the
instruction in ECX, referred to as Cache n in the following
description. To gather information for all cache levels, software must
repeatedly execute CPUID with 8000_001Dh in EAX and ECX set to
increasing values beginning with 0 until a value of 00h is returned in
the field CacheType (EAX[4:0]) indicating no more cache descriptions
are available for this processor."
The termination condition is the same as leaf 4, so we can reuse that
code block for leaf 0x8000001d.
Fixes: 8765d75329 ("KVM: X86: Extend CPUID range to include new leaf")
Cc: Brijesh Singh <brijesh.singh@amd.com>
Cc: Borislav Petkov <bp@suse.de>
Signed-off-by: Jim Mattson <jmattson@google.com>
Reviewed-by: Marc Orr <marcorr@google.com>
Reviewed-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
So far the KVM selftests are compiled without any compiler warnings
enabled. That's quite bad, since we miss a lot of possible bugs this
way. Let's enable at least "-Wall" and some other useful warning flags
now, and fix at least the trivial problems in the code (like unused
variables).
Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The code is trying to check that all the padding is zeroed out and it
does this:
entry->padding[0] == entry->padding[1] == entry->padding[2] == 0
Assume everything is zeroed correctly, then the first comparison is
true, the next comparison is false and false is equal to zero so the
overall condition is true. This bug doesn't affect run time very
badly, but the code should instead just check that all three paddings
are zero individually.
Also the error message was copy and pasted from an earlier error and it
wasn't correct.
Fixes: 7edcb73433 ("KVM: selftests: Add hyperv_cpuid test")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
WARNING: CPU: 0 PID: 13554 at kvm/arch/x86/kvm//../../../virt/kvm/kvm_main.c:4183 kvm_resume+0x3c/0x40 [kvm]
CPU: 0 PID: 13554 Comm: step_after_susp Tainted: G OE 5.1.0-rc4+ #1
RIP: 0010:kvm_resume+0x3c/0x40 [kvm]
Call Trace:
syscore_resume+0x63/0x2d0
suspend_devices_and_enter+0x9d1/0xa40
pm_suspend+0x33a/0x3b0
state_store+0x82/0xf0
kobj_attr_store+0x12/0x20
sysfs_kf_write+0x4b/0x60
kernfs_fop_write+0x120/0x1a0
__vfs_write+0x1b/0x40
vfs_write+0xcd/0x1d0
ksys_write+0x5f/0xe0
__x64_sys_write+0x1a/0x20
do_syscall_64+0x6f/0x6c0
entry_SYSCALL_64_after_hwframe+0x49/0xbe
Commit ca84d1a24 (KVM: x86: Add clock sync request to hardware enable) mentioned
that "we always hold kvm_lock when hardware_enable is called. The one place that
doesn't need to worry about it is resume, as resuming a frozen CPU, the spinlock
won't be taken." However, commit 6706dae9 (virt/kvm: Replace spin_is_locked() with
lockdep) introduces a bug, it asserts when the lock is not held which is contrary
to the original goal.
This patch fixes it by WARN_ON when the lock is held.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Paul E. McKenney <paulmck@linux.ibm.com>
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
Fixes: 6706dae9 ("virt/kvm: Replace spin_is_locked() with lockdep")
[Wrap with #ifdef CONFIG_LOCKDEP - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
VMX's nested_run_pending flag is subtly consumed when stuffing state to
enter guest mode, i.e. needs to be set according before KVM knows if
setting guest state is successful. If setting guest state fails, clear
the flag as a nested run is obviously not pending.
Reported-by: Aaron Lewis <aaronlewis@google.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The offset for reading the shadow VMCS is sizeof(*kvm_state)+VMCS12_SIZE,
so the correct size must be that plus sizeof(*vmcs12). This could lead
to KVM reading garbage data from userspace and not reporting an error,
but is otherwise not sensitive.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
- Correctly annotate HYP-callable code to be non-traceable
- Remove Christoffer from the MAINTAINERS file as his request
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Merge tag 'kvmarm-fixes-for-5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD
KVM/arm updates for 5.2-rc2
- Correctly annotate HYP-callable code to be non-traceable
- Remove Christoffer from the MAINTAINERS file as his request
- Fix incorrect LDADD instruction encoding in our disassembly macros
- Disable the broken ARM64_PSEUDO_NMI support for now
- Add workaround for Cortex-A76 CPU erratum #1463225
- Handle Cortex-A76/Neoverse-N1 erratum #1418040 w/ existing workaround
- Fix IORT build failure if IOMMU_SUPPORT=n
- Fix place-relative module relocation range checking and its
interaction with KASLR
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Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull more arm64 fixes from Will Deacon:
- Fix incorrect LDADD instruction encoding in our disassembly macros
- Disable the broken ARM64_PSEUDO_NMI support for now
- Add workaround for Cortex-A76 CPU erratum #1463225
- Handle Cortex-A76/Neoverse-N1 erratum #1418040 w/ existing workaround
- Fix IORT build failure if IOMMU_SUPPORT=n
- Fix place-relative module relocation range checking and its
interaction with KASLR
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: insn: Add BUILD_BUG_ON() for invalid masks
arm64: insn: Fix ldadd instruction encoding
arm64: Kconfig: Make ARM64_PSEUDO_NMI depend on BROKEN for now
arm64: Handle erratum 1418040 as a superset of erratum 1188873
arm64/module: deal with ambiguity in PRELxx relocation ranges
ACPI/IORT: Fix build error when IOMMU_SUPPORT is disabled
arm64/kernel: kaslr: reduce module randomization range to 2 GB
arm64: errata: Add workaround for Cortex-A76 erratum #1463225
arm64: Remove useless message during oops
Some of Intel Cherrytrail based platforms depend on PMC clock to be always on.
Here couple of quirks to the driver to support affected hardware.
The following is an automated git shortlog grouped by driver:
pmc_atom:
- Add several Beckhoff Automation boards to critclk_systems DMI table
- Add Lex 3I380D industrial PC to critclk_systems DMI table
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Merge tag 'platform-drivers-x86-v5.2-2' of git://git.infradead.org/linux-platform-drivers-x86
Pull x86 platform driver fixes from Andy Shevchenko:
"Some of Intel Cherrytrail based platforms depend on PMC clock to be
always on. Here are a couple of quirks to the driver to support
affected hardware"
* tag 'platform-drivers-x86-v5.2-2' of git://git.infradead.org/linux-platform-drivers-x86:
platform/x86: pmc_atom: Add several Beckhoff Automation boards to critclk_systems DMI table
platform/x86: pmc_atom: Add Lex 3I380D industrial PC to critclk_systems DMI table
Pull thermal SoC fixes from Eduardo Valentin:
- revert pinctrl settings on rockchip which causes boot failure on
rk3288. The proper follow-up patch is being discussed, meanwhile
the revert gets those booting again.
- minor fixes on rcar and tegra
* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal:
thermal: rcar_gen3_thermal: Update temperature conversion method
thermal: rcar_gen3_thermal: Update calculation formula of IRQTEMP
thermal: rcar_gen3_thermal: Update value of Tj_1
thermal: tegra: Make tegra210_tsensor_thermtrips static
Revert "thermal: rockchip: fix up the tsadc pinctrl setting error"
- sdhci-iproc: Fix HS50 data hold time problem for a few variants
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Merge tag 'mmc-v5.2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc
Pull MMC fixes from Ulf Hansson:
"Fix HS50 data hold time problem for a few variants of sdhci-iproc"
* tag 'mmc-v5.2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
mmc: sdhci-iproc: Set NO_HISPD bit to fix HS50 data hold time problem
mmc: sdhci-iproc: cygnus: Set NO_HISPD bit to fix HS50 data hold time problem
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Merge tag 'drm-fixes-2019-05-24-1' of git://anongit.freedesktop.org/drm/drm
Pull drm fixes from Dave Airlie:
"Nothing too unusual here for rc2. Except the amdgpu DMCU firmware
loading fix caused build breakage with a different set of Kconfig
options. I've just reverted it for now until the AMD folks can rewrite
it to avoid that problem.
i915:
- boosting fix
- bump ready task fixes
- GVT - reset fix, error return, TRTT handling fix
amdgpu:
- DMCU firmware loading fix
- Polaris 10 pci id for kfd
- picasso screen corruption fix
- SR-IOV fixes
- vega driver reload fixes
- SMU locking fix
- compute profile fix for kfd
vmwgfx:
- integer overflow fixes
- dma sg fix
sun4i:
- HDMI phy fixes
gma500:
- LVDS detection fix
panfrost:
- devfreq selection fix"
* tag 'drm-fixes-2019-05-24-1' of git://anongit.freedesktop.org/drm/drm: (32 commits)
Revert "drm/amd/display: Don't load DMCU for Raven 1"
drm/panfrost: Select devfreq
drm/gma500/cdv: Check vbt config bits when detecting lvds panels
drm/vmwgfx: integer underflow in vmw_cmd_dx_set_shader() leading to an invalid read
drm/vmwgfx: NULL pointer dereference from vmw_cmd_dx_view_define()
drm/vmwgfx: Use the dma scatter-gather iterator to get dma addresses
drm/vmwgfx: Fix compat mode shader operation
drm/vmwgfx: Fix user space handle equal to zero
drm/vmwgfx: Don't send drm sysfs hotplug events on initial master set
drm/i915/gvt: Fix an error code in ppgtt_populate_spt_by_guest_entry()
drm/i915/gvt: do not let TRTTE and 0x4dfc write passthrough to hardware
drm/i915/gvt: add 0x4dfc to gen9 save-restore list
drm/i915/gvt: Tiled Resources mmios are in-context mmios for gen9+
drm/i915/gvt: use cmd to restore in-context mmios to hw for gen9 platform
drm/i915/gvt: emit init breadcrumb for gvt request
drm/amdkfd: Fix compute profile switching
drm/amdgpu: skip fw pri bo alloc for SRIOV
drm/amd/powerplay: fix locking in smu_feature_set_supported()
drm/amdgpu/gmc9: set vram_width properly for SR-IOV
drm/amdgpu/soc15: skip reset on init
...
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Link: https://lkml.kernel.org/r/20190520075212.713472955@linutronix.de
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Based on 1 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license as published by
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hope that it will be useful but without any warranty without even
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purpose see the gnu general public license for more details you
should have received a copy of the gnu general public license along
with this program in the main directory of the linux [ntfs] source
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Link: https://lkml.kernel.org/r/20190520075212.609299512@linutronix.de
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Based on 1 normalized pattern(s):
this program include file is free software you can redistribute it
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file is distributed in the hope that it will be useful but without
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fitness for a particular purpose see the gnu general public license
for more details you should have received a copy of the gnu general
public license along with this program in the main directory of the
linux [ntfs] distribution in the file copying if not write to the
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Link: https://lkml.kernel.org/r/20190520075212.517001706@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Based on 1 normalized pattern(s):
library are free software you can redistribute them and or modify
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purpose see the gnu general public license for more details you
should have received a copy of the gnu general public license along
with this program see the file copying if not write to the free
software foundation inc 59 temple place suite 330 boston ma 02111
1307 usa
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-or-later
has been chosen to replace the boilerplate/reference in 1 file(s).
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190520075212.429390570@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
