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Wed, 26 Aug 2026 05:00:07 -0700 (PDT) From: Hemanth Selam To: seanjc@google.com, pbonzini@redhat.com, shuah@kernel.org Cc: sashiko-reviews@lists.linux.dev, kvm@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] KVM: selftests: Test the PV_UNHALT feature, not just its CPUID bit Date: Wed, 26 Aug 2026 17:29:44 +0530 Message-ID: <20260826115944.2882320-1-hemanth.selam@gmail.com> X-Mailer: git-send-email 2.43.7 In-Reply-To: <20260826101627.2873660-1-hemanth.selam@gmail.com> References: <20260826101627.2873660-1-hemanth.selam@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Please ignore this version, the report about the hypercall arguments is correct. KVM takes the APIC ID to kick in a1, as kvm_kick_cpu() does, so this asked for APIC ID 0 to be kicked and only passed because the halting vCPU was vCPU 0. v2 halts on a vCPU with a non-zero APIC ID so that a kick sent to the wrong vCPU can no longer pass by accident, and I confirmed that reintroducing the v1 argument order makes it fail: https://lore.kernel.org/all/20260826115900.2882139-1-hemanth.selam@gmail.com Sorry for the noise. Hemanth