Re: [PATCH v2] KVM: x86: Don't read guest CR3 when doing async pf while the MMU is direct

[Sean Christopherson]

On Fri, 12 Dec 2025 21:50:51 +0800, Xiaoyao Li wrote:
> Don't read guest CR3 in kvm_arch_setup_async_pf() if the MMU is direct
> and use INVALID_GPA instead.
> 
> When KVM tries to perform the host-only async page fault for the shared
> memory of TDX guests, the following WARNING is triggered:
> 
>   WARNING: CPU: 1 PID: 90922 at arch/x86/kvm/vmx/main.c:483 vt_cache_reg+0x16/0x20
>   Call Trace:
>   __kvm_mmu_faultin_pfn
>   kvm_mmu_faultin_pfn
>   kvm_tdp_page_fault
>   kvm_mmu_do_page_fault
>   kvm_mmu_page_fault
>   tdx_handle_ept_violation
> 
> [...]

Applied to kvm-x86 misc, with the explicit cast to make 32-bit builds happy.
Thanks!

[1/1] KVM: x86: Don't read guest CR3 when doing async pf while the MMU is direct
      https://github.com/kvm-x86/linux/commit/57a7b47ab30f

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