From d283d5a65a2bdcc570065267be21848bd6fe3d78 Mon Sep 17 00:00:00 2001 From: Marcelo Tosatti Date: Thu, 7 May 2009 15:48:48 -0300 Subject: [PATCH 1/1] Avoid harmless unhandled wrmsr 0xc0010117 messages Olders kernel which don't contain kvm.git commit 61a6bd672bda3b9468bf5895c1be085c4e481138 display the following message: kvm: 32301: cpu0 unhandled wrmsr: 0xc0010117 data 0 When kvm_arch_load_regs is called. This is confusing in bug reports. Avoid it by checking whether the host advertises the MSR, similarly to how MSR_STAR is handled. Signed-off-by: Marcelo Tosatti Signed-off-by: Avi Kivity --- qemu-kvm-x86.c | 15 +++++++++++---- 1 files changed, 11 insertions(+), 4 deletions(-) diff --git a/qemu-kvm-x86.c b/qemu-kvm-x86.c index 98aa530..1096e65 100644 --- a/qemu-kvm-x86.c +++ b/qemu-kvm-x86.c @@ -25,6 +25,7 @@ static struct kvm_msr_list *kvm_msr_list; extern unsigned int kvm_shadow_memory; static int kvm_has_msr_star; +static int kvm_has_vm_hsave_pa; static int lm_capable_kernel; @@ -54,10 +55,14 @@ int kvm_arch_qemu_create_context(void) kvm_msr_list = kvm_get_msr_list(kvm_context); if (!kvm_msr_list) return -1; - for (i = 0; i < kvm_msr_list->nmsrs; ++i) + for (i = 0; i < kvm_msr_list->nmsrs; ++i) { if (kvm_msr_list->indices[i] == MSR_STAR) kvm_has_msr_star = 1; - return 0; + if (kvm_msr_list->indices[i] == MSR_VM_HSAVE_PA) + kvm_has_vm_hsave_pa = 1; + } + + return 0; } static void set_msr_entry(struct kvm_msr_entry *entry, uint32_t index, @@ -260,7 +265,8 @@ void kvm_arch_load_regs(CPUState *env) set_msr_entry(&msrs[n++], MSR_IA32_SYSENTER_EIP, env->sysenter_eip); if (kvm_has_msr_star) set_msr_entry(&msrs[n++], MSR_STAR, env->star); - set_msr_entry(&msrs[n++], MSR_VM_HSAVE_PA, env->vm_hsave); + if (kvm_has_vm_hsave_pa) + set_msr_entry(&msrs[n++], MSR_VM_HSAVE_PA, env->vm_hsave); #ifdef TARGET_X86_64 if (lm_capable_kernel) { set_msr_entry(&msrs[n++], MSR_CSTAR, env->cstar); @@ -435,7 +441,8 @@ void kvm_arch_save_regs(CPUState *env) if (kvm_has_msr_star) msrs[n++].index = MSR_STAR; msrs[n++].index = MSR_IA32_TSC; - msrs[n++].index = MSR_VM_HSAVE_PA; + if (kvm_has_vm_hsave_pa) + msrs[n++].index = MSR_VM_HSAVE_PA; #ifdef TARGET_X86_64 if (lm_capable_kernel) { msrs[n++].index = MSR_CSTAR; -- 1.6.0.6