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[34.91.112.229]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-ab6e47d0dfasm1077074666b.71.2025.02.05.01.57.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 05 Feb 2025 01:57:58 -0800 (PST) Date: Wed, 5 Feb 2025 09:57:54 +0000 From: Quentin Perret To: Mark Brown Cc: Oliver Upton , uJap072421@linux.dev, Marc Zyngier , Joey Gouly , Suzuki K Poulose , Zenghui Yu , Catalin Marinas , Will Deacon , Fuad Tabba , Vincent Donnefort , Sebastian Ene , linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linux-kernel@vger.kernel.org Subject: Re: [PATCH v4 09/18] KVM: arm64: Introduce __pkvm_vcpu_{load,put}() Message-ID: References: <20241218194059.3670226-1-qperret@google.com> <20241218194059.3670226-10-qperret@google.com> <5ca7588c-7bf2-4352-8661-e4a56a9cd9aa@sirena.org.uk> <5b73e1ac-a48d-4064-a095-26cd9662f0c1@sirena.org.uk> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <5b73e1ac-a48d-4064-a095-26cd9662f0c1@sirena.org.uk> On Tuesday 04 Feb 2025 at 14:32:19 (+0000), Mark Brown wrote: > On Mon, Feb 03, 2025 at 03:19:03PM -0800, Oliver Upton wrote: > > On Mon, Feb 03, 2025 at 07:50:44PM +0000, Mark Brown wrote: > > > > Current mainline crashes when running the arch_timer_edge_cases selftest > > > in pKVM mode on a LibreTech Le Potato board, with a bisection pointing > > > at this change. The system dies like this: > > > > > > # selftests: kvm: arch_timer_edge_cases > > > [ 130.599140] kvm [4518]: nVHE hyp panic at: [] __kvm_nvhe___vgic_v3_restore_vmcr_aprs+0x8/0x84! > > > Thanks, fix posted here [*], although as a consequence this machine will > > stop running KVM in protected mode (which was never meant to work in the > > first place). > > Yeah, I wasn't clear if this was something that was intended to work or > not - it's all in a constant state of flux. FWIW a770ee80e662 ("KVM: arm64: pkvm: Disable GICv2 support") did try to explicitly disable things, but was clearly incomplete... Thanks guys for the report and the quick fix! Quentin