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| author | Avi Kivity <avi@redhat.com> | 2010-11-18 13:09:54 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2011-01-12 11:29:41 +0200 |
| commit | 586f9607962cd982293759a4e95ff06e75be5225 (patch) | |
| tree | efce3a218f0268e4a066d1621d594951d6ac569e /arch/x86/kvm/vmx.c | |
| parent | aa17911e3c21b63e3bf94c580ed029d6dad816b4 (diff) | |
| download | lwn-586f9607962cd982293759a4e95ff06e75be5225.tar.gz lwn-586f9607962cd982293759a4e95ff06e75be5225.zip | |
KVM: Add instruction-set-specific exit qualifications to kvm_exit trace
The exit reason alone is insufficient to understand exactly why an exit
occured; add ISA-specific trace parameters for additional information.
Because fetching these parameters is expensive on vmx, and because these
parameters are fetched even if tracing is disabled, we fetch the
parameters via a callback instead of as traditional trace arguments.
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/x86/kvm/vmx.c')
| -rw-r--r-- | arch/x86/kvm/vmx.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 24959105d7fc..ab05ff68bcd7 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -3690,6 +3690,12 @@ static int (*kvm_vmx_exit_handlers[])(struct kvm_vcpu *vcpu) = { static const int kvm_vmx_max_exit_handlers = ARRAY_SIZE(kvm_vmx_exit_handlers); +static void vmx_get_exit_info(struct kvm_vcpu *vcpu, u64 *info1, u64 *info2) +{ + *info1 = vmcs_readl(EXIT_QUALIFICATION); + *info2 = vmcs_read32(VM_EXIT_INTR_INFO); +} + /* * The guest has exited. See if we can fix it or if we need userspace * assistance. @@ -4334,7 +4340,9 @@ static struct kvm_x86_ops vmx_x86_ops = { .get_tdp_level = get_ept_level, .get_mt_mask = vmx_get_mt_mask, + .get_exit_info = vmx_get_exit_info, .exit_reasons_str = vmx_exit_reasons_str, + .get_lpage_level = vmx_get_lpage_level, .cpuid_update = vmx_cpuid_update, |