linux-kernel - Re: [PATCH v16 42/51] KVM: x86: Define Control Protection Exception (#CP) vector

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Message-ID: <3eb74bd9-5b0d-4673-9feb-124844431939@linux.intel.com>
Date: Mon, 22 Sep 2025 16:29:35 +0800
From: Binbin Wu <binbin.wu@...ux.intel.com>
To: Sean Christopherson <seanjc@...gle.com>
Cc: Paolo Bonzini <pbonzini@...hat.com>, kvm@...r.kernel.org,
 linux-kernel@...r.kernel.org, Tom Lendacky <thomas.lendacky@....com>,
 Mathias Krause <minipli@...ecurity.net>, John Allen <john.allen@....com>,
 Rick Edgecombe <rick.p.edgecombe@...el.com>, Chao Gao <chao.gao@...el.com>,
 Xiaoyao Li <xiaoyao.li@...el.com>, Maxim Levitsky <mlevitsk@...hat.com>,
 Zhang Yi Z <yi.z.zhang@...ux.intel.com>, Xin Li <xin@...or.com>
Subject: Re: [PATCH v16 42/51] KVM: x86: Define Control Protection Exception
 (#CP) vector



On 9/20/2025 6:32 AM, Sean Christopherson wrote:
> Add a CP_VECTOR definition for CET's Control Protection Exception (#CP),
> along with human friendly formatting for trace_kvm_inj_exception().
>
> Signed-off-by: Sean Christopherson <seanjc@...gle.com>

Reviewed-by: Binbin Wu <binbin.wu@...ux.intel.com>

> ---
>   arch/x86/include/uapi/asm/kvm.h | 1 +
>   arch/x86/kvm/trace.h            | 2 +-
>   2 files changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/arch/x86/include/uapi/asm/kvm.h b/arch/x86/include/uapi/asm/kvm.h
> index 467116186e71..73e0e88a0a54 100644
> --- a/arch/x86/include/uapi/asm/kvm.h
> +++ b/arch/x86/include/uapi/asm/kvm.h
> @@ -35,6 +35,7 @@
>   #define MC_VECTOR 18
>   #define XM_VECTOR 19
>   #define VE_VECTOR 20
> +#define CP_VECTOR 21
>   
>   /* Select x86 specific features in <linux/kvm.h> */
>   #define __KVM_HAVE_PIT
> diff --git a/arch/x86/kvm/trace.h b/arch/x86/kvm/trace.h
> index 06da19b370c5..322913dda626 100644
> --- a/arch/x86/kvm/trace.h
> +++ b/arch/x86/kvm/trace.h
> @@ -462,7 +462,7 @@ TRACE_EVENT(kvm_inj_virq,
>   #define kvm_trace_sym_exc						\
>   	EXS(DE), EXS(DB), EXS(BP), EXS(OF), EXS(BR), EXS(UD), EXS(NM),	\
>   	EXS(DF), EXS(TS), EXS(NP), EXS(SS), EXS(GP), EXS(PF), EXS(MF),	\
> -	EXS(AC), EXS(MC), EXS(XM), EXS(VE)
> +	EXS(AC), EXS(MC), EXS(XM), EXS(VE), EXS(CP)
>   
>   /*
>    * Tracepoint for kvm interrupt injection: