diff options
| author | Vitaly Kuznetsov <vkuznets@redhat.com> | 2022-11-01 15:54:22 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2022-11-21 06:42:38 -0500 |
| commit | 8fda37cf3d41f1dfb0667c4b10e3dd01d17735b8 (patch) | |
| tree | 798078851c6c04bba6fc03f09e18eb50cf0d97c3 /tools/testing/selftests/kvm/include/x86_64/processor.h | |
| parent | 6c15c3c46520374e1a144942e5228f963f5eb2d5 (diff) | |
| download | linux-8fda37cf3d41f1dfb0667c4b10e3dd01d17735b8.tar.bz2 | |
KVM: selftests: Stuff RAX/RCX with 'safe' values in vmmcall()/vmcall()
vmmcall()/vmcall() are used to exit from L2 to L1 and no concrete hypercall
ABI is currenty followed. With the introduction of Hyper-V L2 TLB flush
it becomes (theoretically) possible that L0 will take responsibility for
handling the call and no L1 exit will happen. Prevent this by stuffing RAX
(KVM ABI) and RCX (Hyper-V ABI) with 'safe' values.
While on it, convert vmmcall() to 'static inline', make it setup stack
frame and move to include/x86_64/svm_util.h.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20221101145426.251680-45-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'tools/testing/selftests/kvm/include/x86_64/processor.h')
| -rw-r--r-- | tools/testing/selftests/kvm/include/x86_64/processor.h | 5 |
1 files changed, 0 insertions, 5 deletions
diff --git a/tools/testing/selftests/kvm/include/x86_64/processor.h b/tools/testing/selftests/kvm/include/x86_64/processor.h index a10f39affa45..5d310abe6c3f 100644 --- a/tools/testing/selftests/kvm/include/x86_64/processor.h +++ b/tools/testing/selftests/kvm/include/x86_64/processor.h @@ -677,11 +677,6 @@ static inline void cpu_relax(void) asm volatile("rep; nop" ::: "memory"); } -#define vmmcall() \ - __asm__ __volatile__( \ - "vmmcall\n" \ - ) - #define ud2() \ __asm__ __volatile__( \ "ud2\n" \ |