diff options
| author | Jim Mattson <jmattson@google.com> | 2022-08-11 00:30:50 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-09-08 12:24:02 +0300 |
| commit | 5424fd0429c5f83986220c3f5cf48a6783d5f256 (patch) | |
| tree | 40a6f349b56be3281aabe7ea8151a9db4d038f81 | |
| parent | 38a6b469bf22f153282fbe7d702a24e9eb43f50e (diff) | |
| download | linux-5424fd0429c5f83986220c3f5cf48a6783d5f256.tar.xz | |
KVM: VMX: Heed the 'msr' argument in msr_write_intercepted()
[ Upstream commit 020dac4187968535f089f83f376a72beb3451311 ]
Regardless of the 'msr' argument passed to the VMX version of
msr_write_intercepted(), the function always checks to see if a
specific MSR (IA32_SPEC_CTRL) is intercepted for write. This behavior
seems unintentional and unexpected.
Modify the function so that it checks to see if the provided 'msr'
index is intercepted for write.
Fixes: 67f4b9969c30 ("KVM: nVMX: Handle dynamic MSR intercept toggling")
Cc: Sean Christopherson <seanjc@google.com>
Signed-off-by: Jim Mattson <jmattson@google.com>
Reviewed-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20220810213050.2655000-1-jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | arch/x86/kvm/vmx/vmx.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c index 0aaea87a1459..b09a50e0af29 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -835,8 +835,7 @@ static bool msr_write_intercepted(struct vcpu_vmx *vmx, u32 msr) if (!(exec_controls_get(vmx) & CPU_BASED_USE_MSR_BITMAPS)) return true; - return vmx_test_msr_bitmap_write(vmx->loaded_vmcs->msr_bitmap, - MSR_IA32_SPEC_CTRL); + return vmx_test_msr_bitmap_write(vmx->loaded_vmcs->msr_bitmap, msr); } unsigned int __vmx_vcpu_run_flags(struct vcpu_vmx *vmx) |