From: Łukasz Stelmach Date: Wed, 4 Apr 2018 07:46:58 +0000 (+0100) Subject: ARM: 8758/1: decompressor: restore r1 and r2 just before jumping to the kernel X-Git-Tag: v4.17-rc6~3^2~8 X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=f2ae9de019e4e2807d812ec4fe1df7c34788a0a0;p=users%2Fhch%2Fmisc.git ARM: 8758/1: decompressor: restore r1 and r2 just before jumping to the kernel 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 --- diff --git a/arch/arm/boot/compressed/head.S b/arch/arm/boot/compressed/head.S index 182bf6add0b9..517e0e18f0b8 100644 --- a/arch/arm/boot/compressed/head.S +++ b/arch/arm/boot/compressed/head.S @@ -561,8 +561,6 @@ 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 @@ -1365,6 +1363,8 @@ __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