From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 151FE3FD152; Mon, 29 Jun 2026 11:19:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782731971; cv=none; b=kt4k8I06UlyYG3MIvas2WvxK93aPMFYvQHMv2GmQYYVezqdYhsuhuUtpRDdS85F0pYCR5eJA4n/Puxz+iHsw0SDdjq2f1548xO4A8gW5U3ulYX1f9ivwp/XMi07H96EaMEyHnzoYdIP2jconaFt57Q/HppMbBQodJXarLFNVW/I= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782731971; c=relaxed/simple; bh=Hlov7Nozzx9yYhHTSJZP/ZUhXHV/Gu1qftbUTIwp+Y4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=drNLxo7fxzYho2v7eGzuzzokwY0G3kCzVqKMAbtdoDAdI1nx8MMZiMvWJHubYcV7pGTwDhfOfM+p5v2CZlrHjZVpolipg8GpoAfR09tA0oB/P9t7jTlPVQtusWeb19Obou9EI9A9F91m4Gd3nS5YpJa1WZManQWCD1JTCgAOejU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b=K3IxTRqg; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b="K3IxTRqg" Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 3AAEE358F; Mon, 29 Jun 2026 04:19:25 -0700 (PDT) Received: from LeoBrasDK.cambridge.arm.com (LeoBrasDK.cambridge.arm.com [10.2.212.21]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 794F73F905; Mon, 29 Jun 2026 04:19:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1782731969; bh=Hlov7Nozzx9yYhHTSJZP/ZUhXHV/Gu1qftbUTIwp+Y4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=K3IxTRqgv9VLVw7RvPJif9Wmw2DyJOcXp8Kl4ZNWUO24q7dKWTIDu2TpRIU2wk/jF KA1h3+9tZbvIX4wyYx7eoFYNuyVCZR/u9hQdnZnWYZXTMda5OTf3AvUFvlDbNGNumH rEs41n/Z5u/+3g3QgRrWtFtt2UeNLe0c3Vbhq5JM= From: Leonardo Bras To: Catalin Marinas , Will Deacon , Marc Zyngier , Oliver Upton , Joey Gouly , Steffen Eiden , Suzuki K Poulose , Zenghui Yu , "Rafael J. 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> Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: 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 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