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authorJim Mattson <jmattson@google.com>2018-10-16 14:29:20 -0700
committerPaolo Bonzini <pbonzini@redhat.com>2018-10-17 19:07:38 +0200
commit59073aaf6de0d2dacc2603cee6d1d6cd5592ac08 (patch)
tree2e8d024ce9d6c72019b4ea73d01a811bf039e5b8 /tools/arch
parentc851436a34cad09388f1303e11ccb6b9420e5692 (diff)
downloadlinux-59073aaf6de0d2dacc2603cee6d1d6cd5592ac08.tar.bz2
kvm: x86: Add exception payload fields to kvm_vcpu_events
The per-VM capability KVM_CAP_EXCEPTION_PAYLOAD (to be introduced in a later commit) adds the following fields to struct kvm_vcpu_events: exception_has_payload, exception_payload, and exception.pending. With this capability set, all of the details of vcpu->arch.exception, including the payload for a pending exception, are reported to userspace in response to KVM_GET_VCPU_EVENTS. With this capability clear, the original ABI is preserved, and the exception.injected field is set for either pending or injected exceptions. When userspace calls KVM_SET_VCPU_EVENTS with KVM_CAP_EXCEPTION_PAYLOAD clear, exception.injected is no longer translated to exception.pending. KVM_SET_VCPU_EVENTS can now only establish a pending exception when KVM_CAP_EXCEPTION_PAYLOAD is set. Reported-by: Jim Mattson <jmattson@google.com> Suggested-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Jim Mattson <jmattson@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'tools/arch')
-rw-r--r--tools/arch/x86/include/uapi/asm/kvm.h10
1 files changed, 8 insertions, 2 deletions
diff --git a/tools/arch/x86/include/uapi/asm/kvm.h b/tools/arch/x86/include/uapi/asm/kvm.h
index 86299efa804a..b09875f580d5 100644
--- a/tools/arch/x86/include/uapi/asm/kvm.h
+++ b/tools/arch/x86/include/uapi/asm/kvm.h
@@ -288,6 +288,7 @@ struct kvm_reinject_control {
#define KVM_VCPUEVENT_VALID_SIPI_VECTOR 0x00000002
#define KVM_VCPUEVENT_VALID_SHADOW 0x00000004
#define KVM_VCPUEVENT_VALID_SMM 0x00000008
+#define KVM_VCPUEVENT_VALID_PAYLOAD 0x00000010
/* Interrupt shadow states */
#define KVM_X86_SHADOW_INT_MOV_SS 0x01
@@ -299,7 +300,10 @@ struct kvm_vcpu_events {
__u8 injected;
__u8 nr;
__u8 has_error_code;
- __u8 pad;
+ union {
+ __u8 pad;
+ __u8 pending;
+ };
__u32 error_code;
} exception;
struct {
@@ -322,7 +326,9 @@ struct kvm_vcpu_events {
__u8 smm_inside_nmi;
__u8 latched_init;
} smi;
- __u32 reserved[9];
+ __u8 reserved[27];
+ __u8 exception_has_payload;
+ __u64 exception_payload;
};
/* for KVM_GET/SET_DEBUGREGS */