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 53E35250C1F; Sat, 26 Apr 2025 12:28:54 +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=1745670534; cv=none; b=kaJvAkxdK7UVzQ5/ejNx4CWiuTFcFtlkXO682KijNFUYoAL6R+6VHQQC9g395srrioIUGbnLdrJZPoN8bqR2Aj7JtsjX6fI0AU68pkFhu1Uize/37K0749w+OdwxoI5CtOARUyOM5+5GAp29eVkW5MD82JDF29RL6P+jR4dv75s= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745670534; c=relaxed/simple; bh=Bpk6RKCUS8mCcn0z7DGT1SGuzw/M+c16uxJw8Nsfl3s=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=W7mC9CfIi6dFNZBoP7wFJ3JcGZ6Uz6HrQzYGpPMRB1QTUGP+Kie+SSkEd4CMCpG41GgcKAZ5tOUy33gkj6ngD6tThu0o987Mzq2UuAUUUPTa3Ertd9cfAebFXTZEpB9Lq5KyOMEulNpVhh6lXgI5XH1wDMkSdXYwQmfzDKvBWx4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=hOfE/T3o; 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="hOfE/T3o" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2EED3C4CEEB; Sat, 26 Apr 2025 12:28:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1745670534; bh=Bpk6RKCUS8mCcn0z7DGT1SGuzw/M+c16uxJw8Nsfl3s=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hOfE/T3oqYgwp07Vjl8Xm1oyVvMer6w0TMVbNitcezajYzRrZ6gJfEml7LejolVXz qBBGjpO81EYj5q9T37ikEVEyjjto8q3KDETtfS5haBZnrMXDXS5teDTEmrSACLMqig lKjFrIyiyhwGgI2nt/7OYxthdmbHHxM0fYPB1XYHn4lcUrXBhCUFfzMIKsKTrlI8XC E55bxiQeezJ+ig7Z0XIQtzWEwmXzLBWrBCDnL9yCUEURIB79sWTIqZ/wuMSIPGmOFl 7Cx0tcyklZEbji4ON7QoL9+eOV/tloz4M1N6blKZEU0tXSLL9/TID3nc5AX9yvEc7D gHPkVdd2N1wyw== 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 1u8eeK-0092VH-9v; Sat, 26 Apr 2025 13:28:52 +0100 From: Marc Zyngier To: kvmarm@lists.linux.dev, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Joey Gouly , Suzuki K Poulose , Oliver Upton , Zenghui Yu , Mark Rutland , Fuad Tabba , Will Deacon , Catalin Marinas Subject: [PATCH v3 14/42] arm64: Add FEAT_FGT2 capability Date: Sat, 26 Apr 2025 13:28:08 +0100 Message-Id: <20250426122836.3341523-15-maz@kernel.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20250426122836.3341523-1-maz@kernel.org> References: <20250426122836.3341523-1-maz@kernel.org> Precedence: bulk X-Mailing-List: kvmarm@lists.linux.dev 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, joey.gouly@arm.com, suzuki.poulose@arm.com, oliver.upton@linux.dev, yuzenghui@huawei.com, mark.rutland@arm.com, tabba@google.com, will@kernel.org, catalin.marinas@arm.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false As we will eventually have to context-switch the FEAT_FGT2 registers in KVM (something that has been completely ignored so far), add a new cap that we will be able to check for. Signed-off-by: Marc Zyngier --- arch/arm64/kernel/cpufeature.c | 7 +++++++ arch/arm64/tools/cpucaps | 1 + 2 files changed, 8 insertions(+) diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index 9c4d6d552b25c..bb6058c7d144c 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -2876,6 +2876,13 @@ static const struct arm64_cpu_capabilities arm64_features[] = { .matches = has_cpuid_feature, ARM64_CPUID_FIELDS(ID_AA64MMFR0_EL1, FGT, IMP) }, + { + .desc = "Fine Grained Traps 2", + .type = ARM64_CPUCAP_SYSTEM_FEATURE, + .capability = ARM64_HAS_FGT2, + .matches = has_cpuid_feature, + ARM64_CPUID_FIELDS(ID_AA64MMFR0_EL1, FGT, FGT2) + }, #ifdef CONFIG_ARM64_SME { .desc = "Scalable Matrix Extension", diff --git a/arch/arm64/tools/cpucaps b/arch/arm64/tools/cpucaps index 772c1b008e437..39b154d2198fb 100644 --- a/arch/arm64/tools/cpucaps +++ b/arch/arm64/tools/cpucaps @@ -28,6 +28,7 @@ HAS_EPAN HAS_EVT HAS_FPMR HAS_FGT +HAS_FGT2 HAS_FPSIMD HAS_GCS HAS_GENERIC_AUTH -- 2.39.2