From bb7a554ae7454ba921d3d59d9480e90c117f97d3 Mon Sep 17 00:00:00 2001 From: =?utf8?q?=C5=81ukasz=20Stelmach?= Date: Wed, 4 Apr 2018 08:46:58 +0100 Subject: [PATCH] ARM: 8758/1: decompressor: restore r1 and r2 just before jumping to the kernel MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit [ Upstream commit f2ae9de019e4e2807d812ec4fe1df7c34788a0a0 ] The hypervisor setup before __enter_kernel destroys the value sotred in r1. The value needs to be restored just before the jump. Fixes: 6b52f7bdb888 ("ARM: hyp-stub: Use r1 for the soft-restart address") Signed-off-by: Łukasz Stelmach Signed-off-by: Russell King Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- arch/arm/boot/compressed/head.S | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arm/boot/compressed/head.S b/arch/arm/boot/compressed/head.S index f51c009..5f687ba 100644 --- a/arch/arm/boot/compressed/head.S +++ b/arch/arm/boot/compressed/head.S @@ -559,8 +559,6 @@ not_relocated: mov r0, #0 bl decompress_kernel bl cache_clean_flush bl cache_off - mov r1, r7 @ restore architecture number - mov r2, r8 @ restore atags pointer #ifdef CONFIG_ARM_VIRT_EXT mrs r0, spsr @ Get saved CPU boot mode @@ -1363,6 +1361,8 @@ __hyp_reentry_vectors: __enter_kernel: mov r0, #0 @ must be 0 + mov r1, r7 @ restore architecture number + mov r2, r8 @ restore atags pointer ARM( mov pc, r4 ) @ call kernel M_CLASS( add r4, r4, #1 ) @ enter in Thumb mode for M class THUMB( bx r4 ) @ entry point is always ARM for A/R classes -- 2.7.4