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AJvYcCUfiuf+dO2YUZ1TFWgzAopoyjcgMRlAzif0/4tqW1DjzzKHBvBvlNlhaceKUjcztRNxIsEgXnQSTjILi3hG7LKZ2Godqw83njK2mPVvc+9TFA== X-Gm-Message-State: AOJu0Yx76Jtm1EQo57pbyc/tTjdtJyzuLZvhWTxxcGWwF8pocwMvJBse 0DR1mVylwTeAH7zF+rKxeHJ2yAYmVCciqS2RDsgNz+4RcrLP9er7wbuulux1vyCi2bWvjdiRswV Flg== X-Google-Smtp-Source: AGHT+IEVV0K/NsKHvincQvOwZ5oaygUzm9suLbxzrsAifLIiHpIfA1J2Hnh30X4NcZ4Nz043OpUOk6/CXhI= X-Received: from zagreus.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:5c37]) (user=seanjc job=sendgmr) by 2002:a81:848b:0:b0:615:ca8:6058 with SMTP id u133-20020a81848b000000b006150ca86058mr70184ywf.5.1712862330335; Thu, 11 Apr 2024 12:05:30 -0700 (PDT) Date: Thu, 11 Apr 2024 12:05:28 -0700 In-Reply-To: Precedence: bulk X-Mailing-List: linux-perf-users@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20240126085444.324918-1-xiong.y.zhang@linux.intel.com> <20240126085444.324918-5-xiong.y.zhang@linux.intel.com> Message-ID: Subject: Re: [RFC PATCH 04/41] perf: core/x86: Add support to register a new vector for PMI handling From: Sean Christopherson To: Xiong Zhang Cc: pbonzini@redhat.com, peterz@infradead.org, mizhang@google.com, kan.liang@intel.com, zhenyuw@linux.intel.com, dapeng1.mi@linux.intel.com, jmattson@google.com, kvm@vger.kernel.org, linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, zhiyuan.lv@intel.com, eranian@google.com, irogers@google.com, samantha.alt@intel.com, like.xu.linux@gmail.com, chao.gao@intel.com, Xiong Zhang Content-Type: text/plain; charset="us-ascii" On Thu, Apr 11, 2024, Sean Christopherson wrote: > > diff --git a/arch/x86/include/asm/idtentry.h b/arch/x86/include/asm/idtentry.h > > index 05fd175cec7d..d1b58366bc21 100644 > > --- a/arch/x86/include/asm/idtentry.h > > +++ b/arch/x86/include/asm/idtentry.h > > @@ -675,6 +675,7 @@ DECLARE_IDTENTRY_SYSVEC(IRQ_WORK_VECTOR, sysvec_irq_work); > > DECLARE_IDTENTRY_SYSVEC(POSTED_INTR_VECTOR, sysvec_kvm_posted_intr_ipi); > > DECLARE_IDTENTRY_SYSVEC(POSTED_INTR_WAKEUP_VECTOR, sysvec_kvm_posted_intr_wakeup_ipi); > > DECLARE_IDTENTRY_SYSVEC(POSTED_INTR_NESTED_VECTOR, sysvec_kvm_posted_intr_nested_ipi); > > +DECLARE_IDTENTRY_SYSVEC(KVM_VPMU_VECTOR, sysvec_kvm_vpmu_handler); > > I vote for KVM_VIRTUAL_PMI_VECTOR. I don't see any reasy to abbreviate "virtual", > and the vector is a for a Performance Monitoring Interupt. Actually, I vote for KVM_GUEST_PMI_VECTOR. The IRQ/PMI itself isn't virtual, it is quite literally the vector that is used for PMIs in KVM guests.