[4.19,091/114] arm64: docs: Document SSBS HWCAP

Message ID	20191010083612.904076126@linuxfoundation.org
State	New
Headers	show Delivered-To: patch@linaro.org Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>, stable@vger.kernel.org, Will Deacon <will.deacon@arm.com>, Catalin Marinas <catalin.marinas@arm.com>, Ard Biesheuvel <ard.biesheuvel@linaro.org> Subject: [PATCH 4.19 091/114] arm64: docs: Document SSBS HWCAP Date: Thu, 10 Oct 2019 10:36:38 +0200 Message-Id: <20191010083612.904076126@linuxfoundation.org> In-Reply-To: <20191010083544.711104709@linuxfoundation.org> References: <20191010083544.711104709@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk
Series	None \| expand [4.19,025/114] crypto: ccree - account for TEE not ready to report [4.19,026/114] crypto: ccree - use the full crypt length value [4.19,037/114] drm/omap: fix max fclk divider for omap36xx [4.19,048/114] arm64: cpufeature: Detect SSBS and advertise to userspace [4.19,091/114] arm64: docs: Document SSBS HWCAP [4.19,094/114] arm64: add sysfs vulnerability show for meltdown [4.19,096/114] arm64: Always enable ssb vulnerability detection

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20191010083612.904076126@linuxfoundation.org

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New

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Received-SPF: pass (google.com: best guess record for domain of
	linux-kernel-owner@vger.kernel.org designates 209.132.180.67
	as permitted sender) client-ip=209.132.180.67; 
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	stable@vger.kernel.org, Will Deacon <will.deacon@arm.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Ard Biesheuvel <ard.biesheuvel@linaro.org>
Subject: [PATCH 4.19 091/114] arm64: docs: Document SSBS HWCAP
Date: Thu, 10 Oct 2019 10:36:38 +0200
Message-Id: <20191010083612.904076126@linuxfoundation.org>
In-Reply-To: <20191010083544.711104709@linuxfoundation.org>
References: <20191010083544.711104709@linuxfoundation.org>
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Commit Message

Greg Kroah-Hartman Oct. 10, 2019, 8:36 a.m. UTC

From: Will Deacon <will.deacon@arm.com>


[ Upstream commit ee91176120bd584aa10c564e7e9fdcaf397190a1 ]

We advertise the MRS/MSR instructions for toggling SSBS at EL0 using an
HWCAP, so document it along with the others.

Signed-off-by: Will Deacon <will.deacon@arm.com>

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 Documentation/arm64/elf_hwcaps.txt |    4 ++++
 1 file changed, 4 insertions(+)

--- a/Documentation/arm64/elf_hwcaps.txt
+++ b/Documentation/arm64/elf_hwcaps.txt
@@ -178,3 +178,7 @@  HWCAP_ILRCPC
 HWCAP_FLAGM
 
     Functionality implied by ID_AA64ISAR0_EL1.TS == 0b0001.
+
+HWCAP_SSBS
+
+    Functionality implied by ID_AA64PFR1_EL1.SSBS == 0b0010.

[4.19,091/114] arm64: docs: Document SSBS HWCAP

Commit Message

Patch