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authorŁukasz Stelmach <l.stelmach@samsung.com>2018-04-04 08:46:58 +0100
committerRussell King <rmk+kernel@armlinux.org.uk>2018-05-19 11:35:56 +0100
commitf2ae9de019e4e2807d812ec4fe1df7c34788a0a0 (patch)
treeae15ff60082dd9499cc35eb513184956b0453285
parente07e3c33b9c0b5751ade624f44325c9bf2487ea6 (diff)
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 <l.stelmach@samsung.com> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
-rw-r--r--arch/arm/boot/compressed/head.S4
1 files changed, 2 insertions, 2 deletions
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