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[34.34.182.0]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4b76cbd082dsm8048725e9.1.2026.11.06.09.58.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 06 Nov 2026 09:58:07 -0800 (PST) Date: Fri, 6 Nov 2026 17:58:03 +0000 From: Vincent Donnefort To: Fuad Tabba Cc: Marc Zyngier , Oliver Upton , kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, Joey Gouly , Suzuki K Poulose , Zenghui Yu , Steffen Eiden , Catalin Marinas , Will Deacon , Mark Rutland , Fuad Tabba , kvm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 0/4] KVM: arm64: Support SVE in protected VMs Message-ID: References: <20261105130456.1617185-1-fuad.tabba@linux.dev> X-Archived-By: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20261105130456.1617185-1-fuad.tabba@linux.dev> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261106_095810_859380_C32E23F4 X-CRM114-Status: GOOD ( 19.48 ) X-Spam-Score: -17.6 (-----------------) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" X-Spam-Status: No, score=-23.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIMWL_WL_MED,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_IN_DEF_DKIM_WL autolearn=ham autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 On Thu, Nov 05, 2026 at 01:04:52PM +0000, Fuad Tabba wrote: > Hi folks, > > This series adds SVE support for protected VMs. EL2 allocates a > protected vCPU's SVE state from its own heap rather than pinning the > host's buffer, so the host never sees the guest's vector registers. It > then advertises ID_AA64ZFR0_EL1 to protected VMs, and routes the SVE > trap to the lazy FP switch. The first patch is a small tidy-up of the > pKVM FP sync code that saves a guest's SVE state. > > v2 of the pKVM selftests series [1] will add a selftest for this. > > Based on Linux 7.4-rc1 (6628e7d4c6b25). > > Cheers, > /fuad > > [1] https://lore.kernel.org/all/20261104084842.132944-1-fuad.tabba@linux.dev/ > > Fuad Tabba (4): > KVM: arm64: Remove redundant kern_hyp_va() calls from the pKVM FP sync > KVM: arm64: Allocate a protected vCPU's SVE state at EL2 > KVM: arm64: Advertise ID_AA64ZFR0_EL1 to protected VMs > KVM: arm64: Allow protected VMs to use SVE > > Documentation/virt/kvm/arm/pkvm.rst | 6 ++--- > arch/arm64/include/asm/kvm_hyp.h | 2 ++ > arch/arm64/include/asm/kvm_pkvm.h | 1 + > arch/arm64/kvm/arm.c | 1 + > arch/arm64/kvm/hyp/nvhe/hyp-main.c | 4 +-- > arch/arm64/kvm/hyp/nvhe/pkvm.c | 41 +++++++++++++++++++---------- > arch/arm64/kvm/hyp/nvhe/switch.c | 1 + > arch/arm64/kvm/hyp/nvhe/sys_regs.c | 22 ++++++++++++++-- > arch/arm64/kvm/reset.c | 2 ++ > 9 files changed, 59 insertions(+), 21 deletions(-) > > > base-commit: 6628e7d4c6b25c8d18f1345e3a20d21829aae7e4 > -- > 2.47.3 > For the whole series Reviewed-by: Vincent Donnefort Tested-by: Vincent Donnefort -- Vincent