cpu: Clear PCR SPR in opal_reinit_cpus()

Currently if Linux boots with a non-zero PCR, things can go bad where
some early userspace programs can take illegal instructions. This is
being fixed in Linux, but in the mean time, we should cleanup in
skiboot also.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Stewart Smith <stewart@linux.ibm.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/core/cpu.c b/core/cpu.c
index 1569c9f..0077103 100644
--- a/core/cpu.c
+++ b/core/cpu.c
@@ -1333,6 +1333,7 @@ static void cpu_cleanup_one(void *param __unused)
 {
 	mtspr(SPR_AMR, 0);
 	mtspr(SPR_IAMR, 0);
+	mtspr(SPR_PCR, 0);
 }
 
 static int64_t cpu_cleanup_all(void)