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authorMark Brown <broonie@kernel.org>2019-06-18 19:10:54 +0100
committerCatalin Marinas <catalin.marinas@arm.com>2019-06-25 14:21:41 +0100
commit1201937491822b61641c1878ebcd16a93aed4540 (patch)
treedd42f26ddbc06125c9aad5dbe6ba438678c459ab /Documentation
parent8049672bb17a53f2545fbeaa6cfbb48055f51cde (diff)
arm64: Expose ARMv8.5 CondM capability to userspace
ARMv8.5 adds new instructions XAFLAG and AXFLAG to translate the representation of the results of floating point comparisons between the native ARM format and an alternative format used by some software. Add a hwcap allowing userspace to determine if they are present, since we referred to earlier CondM extensions as FLAGM call these extensions FLAGM2. Signed-off-by: Mark Brown <broonie@kernel.org> Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/arm64/elf_hwcaps.txt4
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/arm64/elf_hwcaps.txt b/Documentation/arm64/elf_hwcaps.txt
index b73a2519ecf2..ee8dbfe652b6 100644
--- a/Documentation/arm64/elf_hwcaps.txt
+++ b/Documentation/arm64/elf_hwcaps.txt
@@ -207,6 +207,10 @@ HWCAP_FLAGM
Functionality implied by ID_AA64ISAR0_EL1.TS == 0b0001.
+HWCAP2_FLAGM2
+
+ Functionality implied by ID_AA64ISAR0_EL1.TS == 0b0010.
+
HWCAP_SSBS
Functionality implied by ID_AA64PFR1_EL1.SSBS == 0b0010.