From: Gleb Natapov <g...@redhat.com>
Reset stack pointer to zero on S3 resume before jumping to resume vector
to prevent tpr patching on boot CPU during resume.
Signed-off-by: Gleb Natapov <g...@redhat.com>
Signed-off-by: Avi Kivity <a...@redhat.com>
diff --git a/bios/rombios.c b/bios/rombios.c
index b7a240f..54c94bf 100644
--- a/bios/rombios.c
+++ b/bios/rombios.c
@@ -2225,6 +2225,7 @@ s3_resume()
BX_INFO("S3 resume jump to %x:%x\n", (s3_wakeup_vector >> 4),
(s3_wakeup_vector & 0xF));
ASM_START
+ mov sp, #0 ;; disable tpr patching on boot CPU
jmpf [0x04b6]
ASM_END
return 1;
--
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