[PATCH v2 01/16] arm64: Apply errata to swsusp_arch_suspend_exit
From: Fuad Tabba <hidden>
Date: 2021-05-17 07:57:32
Subsystem:
arm64 port (aarch64 architecture), the rest · Maintainers:
Catalin Marinas, Will Deacon, Linus Torvalds
The Arm errata covered by ARM64_WORKAROUND_CLEAN_CACHE require that "dc cvau" instructions get promoted to "dc civac". Reported-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Fuad Tabba <redacted> --- arch/arm64/kernel/hibernate-asm.S | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/kernel/hibernate-asm.S b/arch/arm64/kernel/hibernate-asm.S
index 8ccca660034e..0ed2f72a6b94 100644
--- a/arch/arm64/kernel/hibernate-asm.S
+++ b/arch/arm64/kernel/hibernate-asm.S@@ -91,7 +91,8 @@ SYM_CODE_START(swsusp_arch_suspend_exit) raw_dcache_line_size x2, x3 sub x3, x2, #1 bic x4, x10, x3 -2: dc cvau, x4 /* clean D line / unified line */ +2: /* clean D line / unified line */ +alternative_insn "dc cvau, x4", "dc civac, x4", ARM64_WORKAROUND_CLEAN_CACHE add x4, x4, x2 cmp x4, x1 b.lo 2b
--
2.31.1.751.gd2f1c929bd-goog
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