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 27491466B75; Wed, 29 Jul 2026 10:47:08 +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=1785322030; cv=none; b=iTq8oKtIvIk6+Kg1W3HHXvRfutUi09xrpqhjb54LO10J1vKtfn+6lmkRyjHGPXROIhsLVNjKvgvT489J/I8v9Eu2pNjy6jbg2VtlaLwOomrrLUQgYeey/7QDOhruNSOPQQATkGGWjfak3GfewjiATyr0YA6ap035Fbb+Jm4EYNo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785322030; c=relaxed/simple; bh=wA/Gf0BWpFp54XV49Ev6GaOvlsiX9alXZSU5n1DJWp0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ZWZG/WFbiBrb68LxaQ78F7ZvM5mIp7e9IGV2xMAmqzfveqz+ddr7MagnN0tKvhCZsrnn3bKxSPV95jQNk6B/3p6RVDJrG94WZzfvzR58k9LJIdOMt9+xkeISWF8VPScfqb/9SK4TesmboXc3XVWtWG2Nn+P8M7FHoZRIqLb1wz8= 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=PYl86dk1; 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="PYl86dk1" 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 7B5251688; Wed, 29 Jul 2026 03:47:04 -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 BA4873F66F; Wed, 29 Jul 2026 03:47:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1785322028; bh=wA/Gf0BWpFp54XV49Ev6GaOvlsiX9alXZSU5n1DJWp0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PYl86dk18O21VeaNfvwB9P48elqISXA6MMUK7aFacADEjoTGzb9Cc9RHnzMTkMuNw qYsDdnFh/XknOC8Z3qGqn2gL9FWX25/KsIglfKDlM0LwWy3pQjMKkZ+Mnr+q0UJY0x EjhSMDmDJzCBdAq3wZIEoaroRJbGcXYw9ErU506E= From: Leonardo Bras To: Catalin Marinas , Will Deacon , Marc Zyngier , Oliver Upton , Fuad Tabba , Joey Gouly , Steffen Eiden , Suzuki K Poulose , Zenghui Yu , Paolo Bonzini , James Morse , Leonardo Bras , Yang Shi , mrigendrachaubey , Thomas Huth , Zeng Heng , Ryan Roberts , Mark Brown , Sascha Bischoff , Yicong Yang , Kevin Brodsky , James Clark , Raghavendra Rao Ananta , Yeoreum Yun , Mark Rutland , Anshuman Khandual , Tian Zheng Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kvmarm@lists.linux.dev, kvm@vger.kernel.org Subject: [PATCH v3 11/11] KVM: arm64: Enable KVM_HW_DIRTY_BIT Date: Wed, 29 Jul 2026 11:45:46 +0100 Message-ID: <20260729104548.3439958-12-leo.bras@arm.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260729104548.3439958-1-leo.bras@arm.com> References: <20260729104548.3439958-1-leo.bras@arm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1129; i=leo.bras@arm.com; h=from:subject; bh=wA/Gf0BWpFp54XV49Ev6GaOvlsiX9alXZSU5n1DJWp0=; b=owGbwMvMwCX2pizjszvTwvWMp9WSGLIyb14/4ia3/+0W29hPflf/yqSeaDNcoKejJDdBuyXt2 5WlB8/+7yhlYRDjYpAVU2SRfTR/Fc/3KRlHrvxYADOHlQlkCAMXpwBMxKaVkeH3pp3XZs5c+6Kd 4f9921rDP/KmesLXt2vkzdxY9LD0kr4xI8OXpQ+ZAj3mnlDfJxRhaNR3LvSp0sGGoK+7KhNnT0v f2sYOAA== 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..3264d8ca093e 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 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 -- 2.55.0