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Wysocki" , Len Brown , Saket Dumbre , Paolo Bonzini , Jonathan Cameron , Chengwen Feng , Leonardo Bras , Kees Cook , =?UTF-8?q?Miko=C5=82aj=20Lenczewski?= , James Morse , Zeng Heng , mrigendrachaubey , Thomas Huth , Ryan Roberts , Yeoreum Yun , Mark Brown , Kevin Brodsky , James Clark , Fuad Tabba , Raghavendra Rao Ananta , Lorenzo Pieralisi , Sascha Bischoff , Anshuman Khandual , Tian Zheng Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kvmarm@lists.linux.dev, linux-acpi@vger.kernel.org, acpica-devel@lists.linux.dev, kvm@vger.kernel.org Subject: [PATCH v2 13/13] KVM: arm64: Enable KVM_HW_DIRTY_BIT Date: Mon, 29 Jun 2026 12:18:01 +0100 Message-ID: <20260629111820.1873540-14-leo.bras@arm.com> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260629111820.1873540-1-leo.bras@arm.com> References: <20260629111820.1873540-1-leo.bras@arm.com> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1137; i=leo.bras@arm.com; h=from:subject; bh=Hlov7Nozzx9yYhHTSJZP/ZUhXHV/Gu1qftbUTIwp+Y4=; b=owGbwMvMwCX2pizjszvTwvWMp9WSGLKcQpLub72/bYvV7vYvLekhS/edDW7POb3Sevf/BcGxm htau2K3d5SyMIhxMciKKbLIPpq/iuf7lIwjV34sgJnDygQyhIGLUwAmsqOMkWGvqUmjw/nVLEp+ p9ivLBM7L99jt0JleWi9V/KtzSV2c30Z/infz8uNsu0MErrBejx1G3fFx9QLk7UcBIpsnXzUlk5 +zg8A X-Developer-Key: i=leo.bras@arm.com; a=openpgp; fpr=36E6C95AE0F111CC5B6F4D2E688C33F8A0C5B0C5 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260629_041930_321502_B50B4270 X-CRM114-Status: UNSURE ( 8.95 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Set the corresponding bit to enable hardware accelerated dirty-bitmap and dirty-ring cleaning for arm64. Actually using acceleration depends on the cpus enabling FEAT_HACDBS as well as the pre-requisite features for it, such as FEAT_HDBSS and FEAT_HAFDBS. Signed-off-by: Leonardo Bras --- arch/arm64/kvm/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/kvm/Kconfig b/arch/arm64/kvm/Kconfig index 449154f9a485..db8487bf738b 100644 --- a/arch/arm64/kvm/Kconfig +++ b/arch/arm64/kvm/Kconfig @@ -27,20 +27,21 @@ menuconfig KVM select VIRT_XFER_TO_GUEST_WORK select KVM_VFIO select HAVE_KVM_DIRTY_RING_ACQ_REL select NEED_KVM_DIRTY_RING_WITH_BITMAP select HAVE_KVM_MSI select HAVE_KVM_IRQCHIP select HAVE_KVM_IRQ_ROUTING select HAVE_KVM_IRQ_BYPASS select HAVE_KVM_READONLY_MEM select HAVE_KVM_VCPU_RUN_PID_CHANGE + select HAVE_KVM_HW_DIRTY_BIT if ACPI select SCHED_INFO select GUEST_PERF_EVENTS if PERF_EVENTS select KVM_GUEST_MEMFD help Support hosting virtualized guest machines. If unsure, say N. if KVM -- 2.54.0