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

Message ID	20191010083612.904076126@linuxfoundation.org (mailing list archive)
State	New, archived
Headers	show Return-Path: <SRS0=Y0g6=YD=lists.infradead.org=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@kernel.org> DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1960E22C9D From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.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 summary: Content analysis details: (-5.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- -5.0 RCVD_IN_DNSWL_HI RBL: Sender listed at https://www.dnswl.org/, high trust [198.145.29.99 listed in list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.0 DKIMWL_WL_HIGH DKIMwl.org - Whitelisted High sender Precedence: list Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Ard Biesheuvel <ard.biesheuvel@linaro.org>, Will Deacon <will.deacon@arm.com>, stable@vger.kernel.org, Catalin Marinas <catalin.marinas@arm.com> Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" <linux-arm-kernel-bounces@lists.infradead.org> Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org
Series	None \| expand [4.19,089/114] arm64: ssbd: Add support for PSTATE.SSBS rather than trapping to EL3 [4.19,090/114] KVM: arm64: Set SCTLR_EL2.DSSBS if SSBD is forcefully disabled and !vhe [4.19,091/114] arm64: docs: Document SSBS HWCAP [4.19,092/114] arm64: fix SSBS sanitization [4.19,093/114] arm64: Add sysfs vulnerability show for spectre-v1 [4.19,094/114] arm64: add sysfs vulnerability show for meltdown [4.19,095/114] arm64: enable generic CPU vulnerabilites support [4.19,096/114] arm64: Always enable ssb vulnerability detection [4.19,097/114] arm64: Provide a command line to disable spectre_v2 mitigation [4.19,098/114] arm64: Advertise mitigation of Spectre-v2, or lack thereof [4.19,099/114] arm64: Always enable spectre-v2 vulnerability detection [4.19,100/114] arm64: add sysfs vulnerability show for spectre-v2 [4.19,101/114] arm64: add sysfs vulnerability show for speculative store bypass [4.19,102/114] arm64: ssbs: Dont treat CPUs with SSBS as unaffected by SSB [4.19,103/114] arm64: Force SSBS on context switch

Message ID

20191010083612.904076126@linuxfoundation.org (mailing list archive)

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New, archived

Headers

DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1960E22C9D
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.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>
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Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
 Ard Biesheuvel <ard.biesheuvel@linaro.org>,
 Will Deacon <will.deacon@arm.com>,
 stable@vger.kernel.org, Catalin Marinas <catalin.marinas@arm.com>
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Series

None | expand

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