Re: [PATCH v6 1/8] KVM: TDX: Use kvm_arch_vcpu.host_debugctl to restore the host's DEBUGCTL

[Adrian Hunter]

On 11/06/2025 02:20, Sean Christopherson wrote:
> Use the kvm_arch_vcpu.host_debugctl snapshot to restore DEBUGCTL after
> running a TD vCPU.  The final TDX series rebase was mishandled, likely due
> to commit fb71c7959356 ("KVM: x86: Snapshot the host's DEBUGCTL in common
> x86") deleting the same line of code from vmx.h, i.e. creating a semantic
> conflict of sorts, but no syntactic conflict.
> 
> Using the version in kvm_vcpu_arch picks up the ulong => u64 fix (which
> isn't relevant to TDX) as well as the IRQ fix from commit 189ecdb3e112
> ("KVM: x86: Snapshot the host's DEBUGCTL after disabling IRQs").
> 
> Link: https://lore.kernel.org/all/20250307212053.2948340-10-pbonzini@xxxxxxxxxx
> Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
> Fixes: 8af099037527 ("KVM: TDX: Save and restore IA32_DEBUGCTL")
> Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx>

Thanks for fixing this up!

Reviewed-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>