[PATCH] arm64/sve: Add some comments for sve_save/load_state()
Mark Brown
broonie at kernel.org
Thu Aug 12 13:11:43 PDT 2021
The use of macros for the actual function bodies means legibility is always
going to be a bit of a challenge, especially while we can't rely on SVE
support in the toolchain, but this helps a little.
Signed-off-by: Mark Brown <broonie at kernel.org>
---
arch/arm64/kernel/entry-fpsimd.S | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/arch/arm64/kernel/entry-fpsimd.S b/arch/arm64/kernel/entry-fpsimd.S
index 0a7a64753878..196e921f61de 100644
--- a/arch/arm64/kernel/entry-fpsimd.S
+++ b/arch/arm64/kernel/entry-fpsimd.S
@@ -33,11 +33,24 @@ SYM_FUNC_END(fpsimd_load_state)
#ifdef CONFIG_ARM64_SVE
+/*
+ * Save the SVE state
+ *
+ * x0 - pointer to buffer for state
+ * x1 - pointer to storage for FPSR
+ */
SYM_FUNC_START(sve_save_state)
sve_save 0, x1, 2
ret
SYM_FUNC_END(sve_save_state)
+/*
+ * Load the SVE state
+ *
+ * x0 - pointer to buffer for state
+ * x1 - pointer to storage for FPSR
+ * x2 - VQ-1
+ */
SYM_FUNC_START(sve_load_state)
sve_load 0, x1, x2, 3, x4
ret
--
2.20.1
More information about the linux-arm-kernel
mailing list