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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6

Documentation/virt/kvm/api.rst

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28

arch/x86/kvm/vmx/tdx.c

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1

include/uapi/linux/kvm.h

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