[PATCH] ppc64: enforce medium thread priority in hypervisor calls
Calls into the hypervisor do not raise the thread priority. Ensure we are
running at medium priority upon entry to the hypervisor.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/arch/ppc64/kernel/pSeries_hvCall.S b/arch/ppc64/kernel/pSeries_hvCall.S
index 0715d30..176e8da 100644
--- a/arch/ppc64/kernel/pSeries_hvCall.S
+++ b/arch/ppc64/kernel/pSeries_hvCall.S
@@ -28,6 +28,8 @@
unsigned long *out3); R10
*/
_GLOBAL(plpar_hcall)
+ HMT_MEDIUM
+
mfcr r0
std r8,STK_PARM(r8)(r1) /* Save out ptrs */
@@ -53,6 +55,8 @@
/* Simple interface with no output values (other than status) */
_GLOBAL(plpar_hcall_norets)
+ HMT_MEDIUM
+
mfcr r0
stw r0,8(r1)
@@ -75,6 +79,8 @@
unsigned long *out1); 120(R1)
*/
_GLOBAL(plpar_hcall_8arg_2ret)
+ HMT_MEDIUM
+
mfcr r0
ld r11,STK_PARM(r11)(r1) /* put arg8 in R11 */
stw r0,8(r1)
@@ -99,6 +105,8 @@
unsigned long *out4); 112(R1)
*/
_GLOBAL(plpar_hcall_4out)
+ HMT_MEDIUM
+
mfcr r0
stw r0,8(r1)