On 05/11/20 16:39, Pankaj Gupta wrote:
From: Pankaj Gupta <pankaj.gupta@xxxxxxxxxxxxxxx>
Guest tries to enable LBR (last branch/interrupt/exception) repeatedly,
thus spamming the host kernel logs. As MSR_IA32_DEBUGCTLMSR is not emulated by
KVM, its better to add the error log only with "report_ignored_msrs".
Signed-off-by: Pankaj Gupta <pankaj.gupta@xxxxxxxxxxxxxxx>
---
arch/x86/kvm/x86.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index f5ede41bf9e6..99c69ae43c69 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -3063,9 +3063,9 @@ 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);
Which guest it is? (Patch queued, but I'd like to have a better
description).
Paolo
