Ben Gardon ed5e484b79 KVM: x86/mmu: Ensure forward progress when yielding in TDP MMU iter ... In some functions the TDP iter risks not making forward progress if two threads livelock yielding to one another. This is possible if two threads are trying to execute wrprot_gfn_range. Each could write protect an entry and then yield. This would reset the tdp_iter's walk over the paging structure and the loop would end up repeating the same entry over and over, preventing either thread from making forward progress. Fix this issue by only yielding if the loop has made forward progress since the last yield. Fixes: a6a0b05da9 ("kvm: x86/mmu: Support dirty logging for the TDP MMU") Reviewed-by: Peter Feiner <pfeiner@google.com> Signed-off-by: Ben Gardon <bgardon@google.com> Message-Id: <20210202185734.1680553-14-bgardon@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>		2021-02-04 05:27:40 -05:00
..
mmu	KVM: x86/mmu: Ensure forward progress when yielding in TDP MMU iter	2021-02-04 05:27:40 -05:00
svm	KVM: x86: move kvm_inject_gp up from kvm_set_xcr to callers	2021-02-04 05:27:37 -05:00
vmx	KVM: x86: move kvm_inject_gp up from kvm_set_xcr to callers	2021-02-04 05:27:37 -05:00
cpuid.c	KVM: x86: use static calls to reduce kvm_x86_ops overhead	2021-02-04 05:27:30 -05:00
cpuid.h	KVM: x86: reinstate vendor-agnostic check on SPEC_CTRL cpuid bits	2020-12-11 19:05:13 -05:00
debugfs.c	KVM: let kvm_destroy_vm_debugfs clean up vCPU debugfs directories	2020-06-04 11:00:54 -04:00
emulate.c	KVM: X86: Rename DR6_INIT to DR6_ACTIVE_LOW	2021-02-04 05:27:27 -05:00
hyperv.c	KVM: x86: use static calls to reduce kvm_x86_ops overhead	2021-02-04 05:27:30 -05:00
hyperv.h	KVM: x86: hyper-v: allow KVM_GET_SUPPORTED_HV_CPUID as a system ioctl	2020-11-15 09:49:11 -05:00
i8254.c	kvm: i8254: remove redundant assignment to pointer s	2020-06-11 12:35:18 -04:00
i8254.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
i8259.c	KVM: x86: Refactor picdev_write() to prevent Spectre-v1/L1TF attacks	2020-01-27 19:59:37 +01:00
ioapic.c	KVM: ioapic: break infinite recursion on lazy EOI	2020-10-24 04:42:06 -04:00
ioapic.h	kvm/x86: Remove redundant function implementations	2020-05-27 13:11:10 -04:00
irq_comm.c	x86/kvm: Use msi_msg shadow structs	2020-10-28 20:26:26 +01:00
irq.c	KVM: x86: use static calls to reduce kvm_x86_ops overhead	2021-02-04 05:27:30 -05:00
irq.h	kvm/x86: Remove redundant function implementations	2020-05-27 13:11:10 -04:00
Kconfig	KVM: SVM: Add support for SEV-ES capability in KVM	2020-12-14 11:09:31 -05:00
kvm_cache_regs.h	KVM: x86: use static calls to reduce kvm_x86_ops overhead	2021-02-04 05:27:30 -05:00
kvm_emulate.h	ARM:	2020-04-02 15:13:15 -07:00
lapic.c	KVM: x86: use static calls to reduce kvm_x86_ops overhead	2021-02-04 05:27:30 -05:00
lapic.h	KVM: Stop using deprecated jump label APIs	2021-02-04 05:27:29 -05:00
Makefile	KVM: X86: Implement ring-based dirty memory tracking	2020-11-15 09:49:15 -05:00
mmu.h	KVM: x86: use static calls to reduce kvm_x86_ops overhead	2021-02-04 05:27:30 -05:00
mtrr.c	KVM: x86: remove bogus #GP injection	2020-12-15 05:18:30 -05:00
pmu.c	KVM: x86: use static calls to reduce kvm_x86_ops overhead	2021-02-04 05:27:30 -05:00
pmu.h	KVM: vmx/pmu: Release guest LBR event via lazy release mechanism	2021-02-04 05:27:26 -05:00
trace.h	KVM: x86: use static calls to reduce kvm_x86_ops overhead	2021-02-04 05:27:30 -05:00
tss.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
x86.c	KVM: x86: move kvm_inject_gp up from kvm_set_xcr to callers	2021-02-04 05:27:37 -05:00
x86.h	KVM: move EXIT_FASTPATH_REENTER_GUEST to common code	2021-02-04 05:27:37 -05:00