hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

KVM: arm/arm64: Handle hva aging while destroying the vm 

The mmu_notifier_release() callback of KVM triggers cleaning up
the stage2 page table on kvm-arm. However there could be other
notifier callbacks in parallel with the mmu_notifier_release(),
which could cause the call backs ending up in an empty stage2
page table. Make sure we check it for all the notifier callbacks.

Cc: stable@vger.kernel.org
Fixes: commit 293f29363 ("kvm-arm: Unmap shadow pagetables properly")
Reported-by: Alex Graf <agraf@suse.de>
Reviewed-by: Christoffer Dall <cdall@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Suzuki K Poulose 2017-07-05 09:57:00 +01:00 committed by Marc Zyngier
parent d9f89b4e92
commit 7e5a672289
1 changed files with 4 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
virt/kvm/arm/mmu.c
View File

@ -1718,12 +1718,16 @@ static int kvm_test_age_hva_handler(struct kvm *kvm, gpa_t gpa, u64 size, void *
int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end) int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end)
{ {
if (!kvm->arch.pgd)
return 0;
trace_kvm_age_hva(start, end); trace_kvm_age_hva(start, end);
return handle_hva_to_gpa(kvm, start, end, kvm_age_hva_handler, NULL); return handle_hva_to_gpa(kvm, start, end, kvm_age_hva_handler, NULL);
} }
int kvm_test_age_hva(struct kvm *kvm, unsigned long hva) int kvm_test_age_hva(struct kvm *kvm, unsigned long hva)
{ {
if (!kvm->arch.pgd)
return 0;
trace_kvm_test_age_hva(hva); trace_kvm_test_age_hva(hva);
return handle_hva_to_gpa(kvm, hva, hva, kvm_test_age_hva_handler, NULL); return handle_hva_to_gpa(kvm, hva, hva, kvm_test_age_hva_handler, NULL);
} }