KVM: TDX: restore user ret MSRs

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Several MSRs are clobbered on TD exit that are not used by Linux while
in ring 0.  Ensure the cached value of the MSR is updated on vcpu_put,
and the MSRs themselves before returning to ring 3.

Co-developed-by: Tony Lindgren <tony.lindgren@linux.intel.com>
Signed-off-by: Tony Lindgren <tony.lindgren@linux.intel.com>
Signed-off-by: Isaku Yamahata <isaku.yamahata@intel.com>
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-ID: <20250129095902.16391-10-adrian.hunter@intel.com>
Reviewed-by: Xiayao Li <xiaoyao.li@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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This commit is contained in:

Isaku Yamahata 2025-01-29 11:58:58 +02:00 • committed by Paolo Bonzini

parent d3a6b6cfb8

commit e0b4f31a3c

2 changed files with 51 additions and 1 deletions

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51

arch/x86/kvm/vmx/tdx.c

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1

arch/x86/kvm/vmx/tdx.h

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