On 2017/8/24 18:12, Paolo Bonzini wrote:
The host pkru is restored right after vcpu exit (commit 1be0e61), so
KVM_GET_XSAVE will return the host PKRU value instead. In general,
the PKRU value in vcpu->arch.guest_fpu.state cannot be trusted.
Series as follows:
1) fix independent bug which would cause an oops
2) remove an unnecessary abstraction
3) fix the bug
Please test the patches, as I don't have the affected hardware. Note
that I need the results before tomorrow in order to send these patches
to Linus before going on vacation.
hi Quan
Can you help to test Paolo's patch?
Thanks,
Paolo
Paolo Bonzini (3):
KVM: x86: block guest protection keys unless the host has them enabled
KVM: x86: simplify handling of PKRU
KVM, pkeys: do not use PKRU value in vcpu->arch.guest_fpu.state
arch/x86/include/asm/fpu/internal.h | 6 +++---
arch/x86/include/asm/kvm_host.h | 1 +
arch/x86/kvm/cpuid.c | 2 +-
arch/x86/kvm/kvm_cache_regs.h | 5 -----
arch/x86/kvm/mmu.h | 2 +-
arch/x86/kvm/svm.c | 7 -------
arch/x86/kvm/vmx.c | 25 ++++++++-----------------
arch/x86/kvm/x86.c | 17 ++++++++++++++---
8 files changed, 28 insertions(+), 37 deletions(-)
--
Yang
Alibaba Cloud Computing
