From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 637CDCD6E68 for ; Tue, 2 Jun 2026 15:54:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=lzl6t0t3qxJibjJvjA0dSccYkRiILP6ZySVO4tCSiAg=; b=fV7sYkTRobBIAk+icyeA1mQYyi 61rsd+ykRCUczMQSDyuX7v9A8WAmsPB3ZwjVdrgRxmBxzL+zCP+UTLbJKajI00hTkjjP7sclwTHIf A5WJbiCGJkJ1fX6tP8+5ErdNtqXc1SdUSRxKNNdb7xroqbuCPw7KLvCGhjr0XZyX/hPlEnwhXCXCB WSHradg1jk17R4nxogcml+DAyjx7dyz9BJ1yWKswT6DWYNIICzkNjQ1yv8OXe3wlHPXMdCVNTKK/J 8DqQHtkYjk4jYrH0VN8umUxXg7UXiPO7aTQmV/N95hH9SfkkT1vTJn6i58LE/FTkvUuqNMOppX/HV vwAEkKSA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wURS2-0000000DNB4-1tW6; Tue, 02 Jun 2026 15:54:46 +0000 Received: from sea.source.kernel.org ([2600:3c0a:e001:78e:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wURRy-0000000DN8k-3rVn for linux-arm-kernel@lists.infradead.org; Tue, 02 Jun 2026 15:54:44 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id 5716F42A50; Tue, 2 Jun 2026 15:54:42 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 396F31F00899; Tue, 2 Jun 2026 15:54:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1780415682; bh=lzl6t0t3qxJibjJvjA0dSccYkRiILP6ZySVO4tCSiAg=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=gUv8EgRwvEG6JaKaDfOvjN0ue2cl04+4oQ6798Nb6yLtUbBeeWtFrmdDiJaHP2wE8 csahU2BiCLpOhGUWbK7y4sTZtaOevOQCpsVOq4nX5IwriXwdCdxb3ia8rvsBRHBH4S wyFxzF6bQu861yZpjOlt+nxuoj73zVlKc4M8WDp89jiJpM0LaOqvOAMuwGhxjde4t7 yLKZA9t4QfbaF8RpX0go5dPA9BS4xMWuQJmlPcF0TMACBfy6StwlXjkm5B8vE3ducZ 3JKSwmg9hHej8kz9Uuno16hAUggsZXz6R1KsDmla7wRNjzwz9jUVVj0AGkWkN6TDWL ir8y5e8uwD9hw== 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 1wURRw-00000008fVv-213V; Tue, 02 Jun 2026 15:54:40 +0000 From: Marc Zyngier To: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org Cc: Steffen Eiden , Joey Gouly , Suzuki K Poulose , Oliver Upton , Zenghui Yu Subject: [PATCH 3/3] arm64: cpufeature: Expose ID_AA64ISAR2_EL1.ATS1A to KVM Date: Tue, 2 Jun 2026 16:54:29 +0100 Message-ID: <20260602155430.2088142-4-maz@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260602155430.2088142-1-maz@kernel.org> References: <20260602155430.2088142-1-maz@kernel.org> 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, seiden@linux.ibm.com, joey.gouly@arm.com, suzuki.poulose@arm.com, oupton@kernel.org, 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 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260602_085442_982917_280EAFE6 X-CRM114-Status: GOOD ( 10.35 ) 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 KVM needs to know if the HW implements FEAT_ATS1A in order to correctly sanitise HFGITR_EL2.ATS1E1A, which otherwise defaults to RES0 and AT S1E1A traps are handled as UNDEF. Solves this by exposing ID_AA64ISAR2_EL1.ATS1A to the rest of the kernel. Fixes: ff987ffc0c18c ("KVM: arm64: nv: Add support for FEAT_ATS1A") Signed-off-by: Marc Zyngier --- arch/arm64/kernel/cpufeature.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index 6d53bb15cf7bb..62b0d77217eeb 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -266,6 +266,7 @@ static const struct arm64_ftr_bits ftr_id_aa64isar1[] = { }; static const struct arm64_ftr_bits ftr_id_aa64isar2[] = { + ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64ISAR2_EL1_ATS1A_SHIFT, 4, 0), ARM64_FTR_BITS(FTR_VISIBLE, FTR_NONSTRICT, FTR_LOWER_SAFE, ID_AA64ISAR2_EL1_LUT_SHIFT, 4, 0), ARM64_FTR_BITS(FTR_VISIBLE, FTR_NONSTRICT, FTR_LOWER_SAFE, ID_AA64ISAR2_EL1_CSSC_SHIFT, 4, 0), ARM64_FTR_BITS(FTR_VISIBLE, FTR_NONSTRICT, FTR_LOWER_SAFE, ID_AA64ISAR2_EL1_RPRFM_SHIFT, 4, 0), -- 2.47.3