From: Will Deacon <will.deacon@arm.com>
Date: Tue, 8 Oct 2019 15:39:18 +0000 (+0200)
Subject: arm64: docs: Document SSBS HWCAP
X-Git-Tag: v4.19.79~24
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=09c22781dd2c641c1ed58fc95605fc36ca4fe50f;p=platform%2Fkernel%2Flinux-rpi.git

arm64: docs: Document SSBS HWCAP

[ 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>
---

diff --git a/Documentation/arm64/elf_hwcaps.txt b/Documentation/arm64/elf_hwcaps.txt
index d6aff2c..6feaffe 100644
--- 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.