From 7c5e1feb1d780cc857632c246e78ac7a8e6cf2d7 Mon Sep 17 00:00:00 2001 From: Alison Wang Date: Tue, 17 Jan 2017 09:39:17 +0800 Subject: armv8: aarch64: Fix the warning about x1-x3 nonzero issue For 64-bit kernel, there is a warning about x1-x3 nonzero in violation of boot protocol. To fix this issue, input argument 4 is added for armv8_switch_to_el2 and armv8_switch_to_el1. The input argument 4 will be set to the right value, such as zero. Signed-off-by: Alison Wang Reviewed-by: Alexander Graf Tested-by: Ryan Harkin Tested-by: Michal Simek Reviewed-by: York Sun --- arch/arm/cpu/armv8/transition.S | 22 +++++++++++----------- 1 file changed, 11 insertions(+), 11 deletions(-) (limited to 'arch/arm/cpu/armv8/transition.S') diff --git a/arch/arm/cpu/armv8/transition.S b/arch/arm/cpu/armv8/transition.S index adb9f3566b..ca07465376 100644 --- a/arch/arm/cpu/armv8/transition.S +++ b/arch/arm/cpu/armv8/transition.S @@ -11,9 +11,9 @@ #include ENTRY(armv8_switch_to_el2) - switch_el x5, 1f, 0f, 0f + switch_el x6, 1f, 0f, 0f 0: - cmp x4, #ES_TO_AARCH64 + cmp x5, #ES_TO_AARCH64 b.eq 2f /* * When loading 32-bit kernel, it will jump @@ -22,23 +22,23 @@ ENTRY(armv8_switch_to_el2) bl armv8_el2_to_aarch32 2: /* - * x3 is kernel entry point or switch_to_el1 + * x4 is kernel entry point or switch_to_el1 * if CONFIG_ARMV8_SWITCH_TO_EL1 is defined. * When running in EL2 now, jump to the - * address saved in x3. + * address saved in x4. */ - br x3 -1: armv8_switch_to_el2_m x3, x4, x5 + br x4 +1: armv8_switch_to_el2_m x4, x5, x6 ENDPROC(armv8_switch_to_el2) ENTRY(armv8_switch_to_el1) - switch_el x5, 0f, 1f, 0f + switch_el x6, 0f, 1f, 0f 0: - /* x3 is kernel entry point. When running in EL1 - * now, jump to the address saved in x3. + /* x4 is kernel entry point. When running in EL1 + * now, jump to the address saved in x4. */ - br x3 -1: armv8_switch_to_el1_m x3, x4, x5 + br x4 +1: armv8_switch_to_el1_m x4, x5, x6 ENDPROC(armv8_switch_to_el1) WEAK(armv8_el2_to_aarch32) -- cgit