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-rw-r--r--arch/arm64/include/uapi/asm/ptrace.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/arm64/include/uapi/asm/ptrace.h b/arch/arm64/include/uapi/asm/ptrace.h
index d78623acb649..97c53203150b 100644
--- a/arch/arm64/include/uapi/asm/ptrace.h
+++ b/arch/arm64/include/uapi/asm/ptrace.h
@@ -176,6 +176,10 @@ struct user_sve_header {
* FPCR uint32_t FPCR
*
* Additional data might be appended in the future.
+ *
+ * The Z-, P- and FFR registers are represented in memory in an endianness-
+ * invariant layout which differs from the layout used for the FPSIMD
+ * V-registers on big-endian systems: see sigcontext.h for more explanation.
*/
#define SVE_PT_SVE_ZREG_SIZE(vq) __SVE_ZREG_SIZE(vq)