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 5C19E2629D; Tue, 25 Nov 2025 20:48:53 +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=1764103734; cv=none; b=gO5PUfBecJA+o+1D1DMRK67QjJFlj/Ivgdl/Ew0akyYNs5ZOYfk1GPRbjuu46d9yMol8sGGZUPTPirsE8GcTROjyen1hCiAmhSUTP3Xd2d9Cr+uIxaB1agiscyAq0PIwUlhLaadwF/jdM0HGAR+a8edkVGzKjphcpfV9M65VEGw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764103734; c=relaxed/simple; bh=JK/jjvYSwgAGtXn2/4YtYuj6bvcT8tHZpTXPO//omWg=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=dw8JipLO5i2n1qpN0TV0JdvfbtFXwTuzJ5hnGAZ+CvvukRFOgrWwux6hzVknxyeoHtPM2Wb8nImdsKtLgpRQUYo3ic4jTAAc0RhvEdW3rUR5vEavkeuiUQ4WLnSJCD2IKzLHCtktmdux1F+FXLeznzKpknHDxLgNDC9vQwlwB5w= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=t9mZv298; 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="t9mZv298" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CF0FCC4CEF1; Tue, 25 Nov 2025 20:48:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1764103733; bh=JK/jjvYSwgAGtXn2/4YtYuj6bvcT8tHZpTXPO//omWg=; h=From:To:Cc:Subject:Date:From; b=t9mZv298Wpa5eTpRc/cfeMLeKRD7X1tEKMrtXLVf/QISI3Crlp6vonCAvSPxWQsZY ro+iytmds2t16rpz2mdFFyA4Q4PJOfadM9IcZEdnyiWmGJQC3Q0oLaGlUCjVHbzq8d NLxScvnNk6R8dlh9BJIpPLBiknpId/E1OGH4rpB9lKs+E9wgvABFin1JjAiASSzh6W i0r+a3+6yKpu4ABehDmL8J273pok8USYQHeZc4emMz5Z+u+/r/8jub4O0qifFJjHNl QZR22SlP707NVF3dA6Ghczg1rDcfZf07sz+CbJAF6zHeKqhLtE+ZkABDzVdYzowhmi 75GJtcxBvhz+A== 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 4.98.2) (envelope-from ) id 1vNzxz-00000008HI3-3DX2; Tue, 25 Nov 2025 20:48:51 +0000 From: Marc Zyngier To: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org Cc: Joey Gouly , Suzuki K Poulose , Oliver Upton , Zenghui Yu , kernel test robot Subject: [PATCH v2] KVM: arm64: Add endian casting to kvm_swap_s[12]_desc() Date: Tue, 25 Nov 2025 20:48:48 +0000 Message-ID: <20251125204848.1136383-1-maz@kernel.org> X-Mailer: git-send-email 2.47.3 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, linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org, joey.gouly@arm.com, suzuki.poulose@arm.com, oupton@kernel.org, yuzenghui@huawei.com, lkp@intel.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false Keep sparse quiet by explicitly casting endianness conversion when swapping S1 and S2 descriptors. Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202511260246.JQDGsQKa-lkp@intel.com/ Closes: https://lore.kernel.org/oe-kbuild-all/202511260344.9XehvH5Q-lkp@intel.com/ Fixes: c59ca4b5b0c3f ("KVM: arm64: Implement HW access flag management in stage-1 SW PTW") Fixes: 39db933ba67f8 ("KVM: arm64: nv: Implement HW access flag management in stage-2 SW PTW") Signed-off-by: Marc Zyngier --- Notes: Missed the S2 issue the first time, and only caught up with the robot's email. arch/arm64/kvm/at.c | 8 ++++---- arch/arm64/kvm/nested.c | 8 ++++---- 2 files changed, 8 insertions(+), 8 deletions(-) diff --git a/arch/arm64/kvm/at.c b/arch/arm64/kvm/at.c index f774a02d9393b..d25fef0f66e21 100644 --- a/arch/arm64/kvm/at.c +++ b/arch/arm64/kvm/at.c @@ -386,11 +386,11 @@ static int kvm_swap_s1_desc(struct kvm_vcpu *vcpu, u64 pa, u64 old, u64 new, struct s1_walk_info *wi) { if (wi->be) { - old = cpu_to_be64(old); - new = cpu_to_be64(new); + old = (__force u64)cpu_to_be64(old); + new = (__force u64)cpu_to_be64(new); } else { - old = cpu_to_le64(old); - new = cpu_to_le64(new); + old = (__force u64)cpu_to_le64(old); + new = (__force u64)cpu_to_le64(new); } return __kvm_at_swap_desc(vcpu->kvm, pa, old, new); diff --git a/arch/arm64/kvm/nested.c b/arch/arm64/kvm/nested.c index c3033d1fe718c..cdeeb8f09e722 100644 --- a/arch/arm64/kvm/nested.c +++ b/arch/arm64/kvm/nested.c @@ -224,11 +224,11 @@ static int swap_guest_s2_desc(struct kvm_vcpu *vcpu, phys_addr_t pa, u64 old, u6 struct s2_walk_info *wi) { if (wi->be) { - old = cpu_to_be64(old); - new = cpu_to_be64(new); + old = (__force u64)cpu_to_be64(old); + new = (__force u64)cpu_to_be64(new); } else { - old = cpu_to_le64(old); - new = cpu_to_le64(new); + old = (__force u64)cpu_to_le64(old); + new = (__force u64)cpu_to_le64(new); } return __kvm_at_swap_desc(vcpu->kvm, pa, old, new); -- 2.47.3