From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9DCFC24468D; Sun, 17 Aug 2025 12:19:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755433176; cv=none; b=Yz8OORvx3jkyjw2HbGFipDagCHLBwMP49amR8pb10RhL5k2nyynQ54efrsNEjwGiN1IEfL5usOsD7miRbfiy/SsjMSiA+6/oJW0oI10F6RnzFk+AR/e4ZNljOT68UcLT4fFi4vxqsSlnAD8NeSuC9I2PyW1jWNIMone8J+du51Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755433176; c=relaxed/simple; bh=dASPEeUs8fF0JPg3CriKPlz4cPW/fuQlXdkrCNipZ94=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=aqJi0szhfndIWHVNwlCsZ3igak0L14nib0T2p1QCSAH+M97b1y56mrqHHQCnRvsZoMdwRlrQauP7jZ5A+iPodcbdviIytrPQRQoOgTwCD0u/rS/73laVrBXD8DYjKRLM4eD+cBsIsxy9EZoAQ30f1EPuw8en4mfPnHqcXtY9dqY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=H9+H61Tm; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="H9+H61Tm" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 78009C4CEEB; Sun, 17 Aug 2025 12:19:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1755433175; bh=dASPEeUs8fF0JPg3CriKPlz4cPW/fuQlXdkrCNipZ94=; h=From:To:Cc:Subject:Date:From; b=H9+H61TmbPT1dYHWQNGeArlMFwF2rWVIbw/Aj6xGhtxf4UIb6GHqCPt3HYiSoFz/I OZnBgzdHRATym/EZ9I5zW/sy7gxU/wSrwFujauVxbDhRfadOJOYH18eP5qkQop2T4E 1BS2UG4fWrx+G3m7rcH3u6713WUYywLikKFFTNryx+qXX4iRzNtkHkSJkA0XAaL8OV zyFtIR/DrldGnWUJzwWHyNKzTLNlZvPuthB3QW6nGALBa2mm+XIFh3QrOt/jXiTAuz k9K9hHkstqKOGK+IGutqJYCrYzy4AgXYC8NcwPQ8O/sRgcZ+eXPps3K3ifY+5/8oY2 uTo/D7bT3/X0Q== Received: from sofa.misterjones.org ([185.219.108.64] helo=valley-girl.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1uncME-008L0z-9v; Sun, 17 Aug 2025 13:19:30 +0100 From: Marc Zyngier To: kvmarm@lists.linux.dev, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Volodymyr Babchuk , Joey Gouly , Suzuki K Poulose , Oliver Upton , Zenghui Yu Subject: [PATCH v2 0/4] KVM: arm64: Live system register access fixes Date: Sun, 17 Aug 2025 13:19:22 +0100 Message-Id: <20250817121926.217900-1-maz@kernel.org> X-Mailer: git-send-email 2.39.2 Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: kvmarm@lists.linux.dev, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, volodymyr_babchuk@epam.com, joey.gouly@arm.com, suzuki.poulose@arm.com, oliver.upton@linux.dev, yuzenghui@huawei.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false This series stems from [1], which outlined some rather bad bugs in the way we handle live system registers with VHE. As the discussion progressed, I decided to tighten things a bit, and found a couple more bugs in the process. I appreciate this is a bit big for a -rc, but at the same time some of the issues are rather annoying, and I'd like to make sure we address these for good. [1] https://lore.kernel.org/all/20250809144811.2314038-3-maz@kernel.org/ Marc Zyngier (4): KVM: arm64: Check for SYSREGS_ON_CPU before accessing the 32bit state KVM: arm64: Simplify sysreg access on exception delivery KVM: arm64: Fix vcpu_{read,write}_sys_reg() accessors KVM: arm64: Remove __vcpu_{read,write}_sys_reg_{from,to}_cpu() arch/arm64/include/asm/kvm_host.h | 111 +--------- arch/arm64/kvm/hyp/exception.c | 20 +- arch/arm64/kvm/sys_regs.c | 344 ++++++++++++++++++++---------- 3 files changed, 243 insertions(+), 232 deletions(-) -- 2.39.2