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KVM: TDX: Handle TDG.VP.VMCALL<ReportFatalError>

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Convert TDG.VP.VMCALL<ReportFatalError> to KVM_EXIT_SYSTEM_EVENT with
a new type KVM_SYSTEM_EVENT_TDX_FATAL and forward it to userspace for
handling.

TD guest can use TDG.VP.VMCALL<ReportFatalError> to report the fatal
error it has experienced.  This hypercall is special because TD guest
is requesting a termination with the error information, KVM needs to
forward the hypercall to userspace anyway, KVM doesn't do parsing or
conversion, it just dumps the 16 general-purpose registers to userspace
and let userspace decide what to do.

Signed-off-by: Binbin Wu <binbin.wu@linux.intel.com>
Message-ID: <20250222014225.897298-8-binbin.wu@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Binbin Wu
2025-02-22 09:42:23 +08:00
committed by Paolo Bonzini
parent 2c30488083
commit 79462faa2b
3 changed files with 35 additions and 0 deletions
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1
include/uapi/linux/kvm.h
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@@ -375,6 +375,7 @@ struct kvm_run {
#define KVM_SYSTEM_EVENT_WAKEUP 4
#define KVM_SYSTEM_EVENT_SUSPEND 5
#define KVM_SYSTEM_EVENT_SEV_TERM 6
#define KVM_SYSTEM_EVENT_TDX_FATAL 7
__u32 type;
__u32 ndata;
union {