On Sun, Mar 10, 2013 at 06:03:55PM +0200, Abel Gordon wrote:
> Add new counters to measure how many vmread/vmwrite/vmlaunch/vmresume/vmclear
> instructions were trapped and emulated by L0
>
stat counters are deprecated in favor of trace points. Adding kvmnested
trace system is very welcome though.
> Signed-off-by: Abel Gordon <abelg@xxxxxxxxxx>
> ---
> arch/x86/include/asm/kvm_host.h | 6 ++++++
> arch/x86/kvm/vmx.c | 7 +++++++
> arch/x86/kvm/x86.c | 6 ++++++
> 3 files changed, 19 insertions(+)
>
> --- .before/arch/x86/include/asm/kvm_host.h 2013-03-10 18:00:54.000000000 +0200
> +++ .after/arch/x86/include/asm/kvm_host.h 2013-03-10 18:00:54.000000000 +0200
> @@ -619,6 +619,12 @@ struct kvm_vcpu_stat {
> u32 hypercalls;
> u32 irq_injections;
> u32 nmi_injections;
> + u32 nvmx_vmreads;
> + u32 nvmx_vmwrites;
> + u32 nvmx_vmptrlds;
> + u32 nvmx_vmlaunchs;
> + u32 nvmx_vmresumes;
> + u32 nvmx_vmclears;
> };
>
> struct x86_instruction_info;
> --- .before/arch/x86/kvm/vmx.c 2013-03-10 18:00:54.000000000 +0200
> +++ .after/arch/x86/kvm/vmx.c 2013-03-10 18:00:54.000000000 +0200
> @@ -5545,6 +5545,7 @@ static int handle_vmclear(struct kvm_vcp
> struct vmcs12 *vmcs12;
> struct page *page;
> struct x86_exception e;
> + ++vcpu->stat.nvmx_vmclears;
>
> if (!nested_vmx_check_permission(vcpu))
> return 1;
> @@ -5601,12 +5602,14 @@ static int nested_vmx_run(struct kvm_vcp
> /* Emulate the VMLAUNCH instruction */
> static int handle_vmlaunch(struct kvm_vcpu *vcpu)
> {
> + ++vcpu->stat.nvmx_vmlaunchs;
> return nested_vmx_run(vcpu, true);
> }
>
> /* Emulate the VMRESUME instruction */
> static int handle_vmresume(struct kvm_vcpu *vcpu)
> {
> + ++vcpu->stat.nvmx_vmresumes;
>
> return nested_vmx_run(vcpu, false);
> }
> @@ -5689,6 +5692,7 @@ static int handle_vmread(struct kvm_vcpu
> u32 vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO);
> gva_t gva = 0;
>
> + ++vcpu->stat.nvmx_vmreads;
> if (!nested_vmx_check_permission(vcpu) ||
> !nested_vmx_check_vmcs12(vcpu))
> return 1;
> @@ -5741,6 +5745,8 @@ static int handle_vmwrite(struct kvm_vcp
> u64 field_value = 0;
> struct x86_exception e;
>
> + ++vcpu->stat.nvmx_vmwrites;
> +
> if (!nested_vmx_check_permission(vcpu) ||
> !nested_vmx_check_vmcs12(vcpu))
> return 1;
> @@ -5807,6 +5813,7 @@ static int handle_vmptrld(struct kvm_vcp
> gva_t gva;
> gpa_t vmptr;
> struct x86_exception e;
> + ++vcpu->stat.nvmx_vmptrlds;
>
> if (!nested_vmx_check_permission(vcpu))
> return 1;
> --- .before/arch/x86/kvm/x86.c 2013-03-10 18:00:54.000000000 +0200
> +++ .after/arch/x86/kvm/x86.c 2013-03-10 18:00:54.000000000 +0200
> @@ -145,6 +145,12 @@ struct kvm_stats_debugfs_item debugfs_en
> { "insn_emulation_fail", VCPU_STAT(insn_emulation_fail) },
> { "irq_injections", VCPU_STAT(irq_injections) },
> { "nmi_injections", VCPU_STAT(nmi_injections) },
> + { "nvmx_vmreads", VCPU_STAT(nvmx_vmreads) },
> + { "nvmx_vmwrites", VCPU_STAT(nvmx_vmwrites) },
> + { "nvmx_vmptrlds", VCPU_STAT(nvmx_vmptrlds) },
> + { "nvmx_vmlaunchs", VCPU_STAT(nvmx_vmlaunchs) },
> + { "nvmx_vmresumes", VCPU_STAT(nvmx_vmresumes) },
> + { "nvmx_vmclears", VCPU_STAT(nvmx_vmclears) },
> { "mmu_shadow_zapped", VM_STAT(mmu_shadow_zapped) },
> { "mmu_pte_write", VM_STAT(mmu_pte_write) },
> { "mmu_pte_updated", VM_STAT(mmu_pte_updated) },
>
> --
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--
Gleb.
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