diff options
| author | Pankaj Gupta <pankaj.gupta@cloud.ionos.com> | 2020-11-05 16:39:32 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-11-08 04:41:31 -0500 |
| commit | 2cdef91cf882abc74dd2f6bfae16db782b44c6ce (patch) | |
| tree | 7c41e3f68f7b966655e2d7608d9a0ad3440ae2c5 /arch | |
| parent | 1e293d1ae88cd0e2a0ad4c275f5dc2d8ae7b4387 (diff) | |
KVM: x86: handle MSR_IA32_DEBUGCTLMSR with report_ignored_msrs
Windows2016 guest tries to enable LBR by setting the corresponding bits
in MSR_IA32_DEBUGCTLMSR. KVM does not emulate MSR_IA32_DEBUGCTLMSR and
spams the host kernel logs with error messages like:
kvm [...]: vcpu1, guest rIP: 0xfffff800a8b687d3 kvm_set_msr_common: MSR_IA32_DEBUGCTLMSR 0x1, nop"
This patch fixes this by enabling error logging only with
'report_ignored_msrs=1'.
Signed-off-by: Pankaj Gupta <pankaj.gupta@cloud.ionos.com>
Message-Id: <20201105153932.24316-1-pankaj.gupta.linux@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kvm/x86.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index d9651faabe68..447edc0d1d5a 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -3065,9 +3065,9 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info) /* Values other than LBR and BTF are vendor-specific, thus reserved and should throw a #GP */ return 1; - } - vcpu_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTLMSR 0x%llx, nop\n", - __func__, data); + } else if (report_ignored_msrs) + vcpu_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTLMSR 0x%llx, nop\n", + __func__, data); break; case 0x200 ... 0x2ff: return kvm_mtrr_set_msr(vcpu, msr, data); |