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AJvYcCWDFUukgwhcPbSO6krTvvlOYGdFUnqgXAIhKM/h7f1m+LkLczM+S1k8ZxLid+TW7RXV+FphXmZoIKe6mNU=@vger.kernel.org X-Gm-Message-State: AOJu0YxNid1uHIzCfBrwPwvAu+Z8ewX5NbkKlQ38ytocunjkxUu8rYHO JRPe0xImceccxdhHfEglc/UiP6xPSbDPwRx8tgrUWm+aYdk4fQOArAOglzt2x8EiCqdfzTta3/y LIQ== X-Google-Smtp-Source: AGHT+IFRZiukULQx/2fLXpoCzka/CF3jla1TGJ8jtcm6RRL0keYWCLj/mfa9mFnxvbhxlAP78zp2a3oigdc= X-Received: from pfnx2.prod.google.com ([2002:aa7:84c2:0:b0:736:451f:b9f4]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a00:114e:b0:736:5438:ccc with SMTP id d2e1a72fcca58-739d852cbb9mr388364b3a.9.1743630263625; Wed, 02 Apr 2025 14:44:23 -0700 (PDT) Date: Wed, 2 Apr 2025 14:44:22 -0700 In-Reply-To: <63abbc66-b237-4f7f-8aec-e32ebf6c62bd@intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250318153316.1970147-1-chao.gao@intel.com> <63abbc66-b237-4f7f-8aec-e32ebf6c62bd@intel.com> Message-ID: Subject: Re: [PATCH v4 0/8] Introduce CET supervisor state support From: Sean Christopherson To: Dave Hansen Cc: Rick P Edgecombe , Chao Gao , "x86@kernel.org" , "linux-kernel@vger.kernel.org" , "tglx@linutronix.de" , "kvm@vger.kernel.org" , "pbonzini@redhat.com" , "ebiggers@google.com" , "vigbalas@amd.com" , "dave.hansen@linux.intel.com" , Chang Seok Bae , "levymitchell0@gmail.com" , "samuel.holland@sifive.com" , Xin3 Li , Weijiang Yang , "mingo@redhat.com" , "mlevitsk@redhat.com" , "john.allen@amd.com" , Stanislav Spassov , "attofari@amazon.de" , Rongqing Li , "hpa@zytor.com" , "peterz@infradead.org" , "aruna.ramakrishna@oracle.com" , "bp@alien8.de" , Zhao1 Liu , "ubizjak@gmail.com" Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable On Wed, Apr 02, 2025, Dave Hansen wrote: > On 4/2/25 14:12, Edgecombe, Rick P wrote: > > In any case, at this point I think we need to either double down on pol= ishing > > this thing up (by pausing other work) and have a clear =E2=80=9Cplease = do this with > > these patches" request, or declare failure and argue for the smaller ve= rsion. > >=20 > > I guess I still lean towards keeping the optimization. But I do think i= t's worth > > considering at this point. >=20 > I'm not quite feeling the same sense of panic and some need to pause > other work. This is thing is at v4. Between spring break and the merge > window, v4 hasn't gotten many eyeballs, except Chang's (thanks Chang!). This particular series is at v4, but KVM CET support was more or less ready= to roll 4 *years* ago. I agree there's no need to panic, but some sense of ur= gency would be nice.