Dirtying the CC allows us to find missing CC changes.
Signed-off-by: Janosch Frank <frankja@xxxxxxxxxxxxx>
---
lib/s390x/asm/uv.h | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/lib/s390x/asm/uv.h b/lib/s390x/asm/uv.h
index e9fb19af..85f7b060 100644
--- a/lib/s390x/asm/uv.h
+++ b/lib/s390x/asm/uv.h
@@ -9,6 +9,8 @@
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2.
*/
+#include <asm/arch_def.h>
+
#ifndef _ASMS390X_UV_H_
#define _ASMS390X_UV_H_
@@ -216,14 +218,16 @@ struct uv_cb_ssc {
static inline int uv_call_once(unsigned long r1, unsigned long r2)
{
+ uint64_t spm_cc = 1 << SPM_CC_SHIFT;
int cc;
asm volatile(
+ " spm %[spm_cc]\n"
"0: .insn rrf,0xB9A40000,%[r1],%[r2],0,0\n"
" ipm %[cc]\n"
" srl %[cc],28\n"
: [cc] "=d" (cc)
- : [r1] "a" (r1), [r2] "a" (r2)
+ : [r1] "a" (r1), [r2] "a" (r2), [spm_cc] "d" (spm_cc)
: "memory", "cc");
if (UVC_ERR_DEBUG && cc == 1)
--
2.40.1
