KVM: VMX: Move core VMXON enablement to kernel

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Move the innermost VMXON+VMXOFF logic out of KVM and into to core x86 so
that TDX can (eventually) force VMXON without having to rely on KVM being
loaded, e.g. to do SEAMCALLs during initialization.

Opportunistically update the comment regarding emergency disabling via NMI
to clarify that virt_rebooting will be set by _another_ emergency callback,
i.e. that virt_rebooting doesn't need to be set before VMCLEAR, only
before _this_ invocation does VMXOFF.

Acked-by: Dave Hansen <dave.hansen@linux.intel.com>
Tested-by: Chao Gao <chao.gao@intel.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Tested-by: Sagi Shahar <sagis@google.com>
Link: https://patch.msgid.link/20260214012702.2368778-7-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

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This commit is contained in:

Sean Christopherson 2026-02-13 17:26:52 -08:00

parent 95e4adb24f

commit 920da4f755

4 changed files with 92 additions and 73 deletions

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1

arch/x86/events/intel/pt.c

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6

arch/x86/include/asm/virt.h

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73

arch/x86/kvm/vmx/vmx.c

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85

arch/x86/virt/hw.c

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