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

Message ID 20191010083612.904076126@linuxfoundation.org
State New
Headers show
Series
  • Untitled series #24004
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Commit Message

Greg KH Oct. 10, 2019, 8:36 a.m.
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(+)

Patch

--- 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.