Commit 8c6e17b3 authored by Anton Blanchard's avatar Anton Blanchard Committed by Linus Torvalds

[PATCH] ppc64: set SMT thread priority to medium for all exceptions

We need to set the thread priority to medium when entering all exceptions. 
We may have been executing in low priority (eg the idle loop), but
definitely do not want to remain in that priority for the duration of the
exception (eg a device interrupt).
Signed-off-by: default avatarAnton Blanchard <anton@samba.org>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 3fe8bedc
......@@ -303,12 +303,14 @@ exception_marker:
. = n; \
.globl label##_Pseries; \
label##_Pseries: \
HMT_MEDIUM; \
mtspr SPRG1,r13; /* save r13 */ \
EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label##_common)
#define STD_EXCEPTION_ISERIES(n, label, area) \
.globl label##_Iseries; \
label##_Iseries: \
HMT_MEDIUM; \
mtspr SPRG1,r13; /* save r13 */ \
EXCEPTION_PROLOG_ISERIES_1(area); \
EXCEPTION_PROLOG_ISERIES_2; \
......@@ -317,6 +319,7 @@ label##_Iseries: \
#define MASKABLE_EXCEPTION_ISERIES(n, label) \
.globl label##_Iseries; \
label##_Iseries: \
HMT_MEDIUM; \
mtspr SPRG1,r13; /* save r13 */ \
EXCEPTION_PROLOG_ISERIES_1(PACA_EXGEN); \
lbz r10,PACAPROFENABLED(r13); \
......@@ -410,12 +413,14 @@ __start_interrupts:
. = 0x200
_MachineCheckPseries:
HMT_MEDIUM
mtspr SPRG1,r13 /* save r13 */
EXCEPTION_PROLOG_PSERIES(PACA_EXMC, MachineCheck_common)
. = 0x300
.globl DataAccess_Pseries
DataAccess_Pseries:
HMT_MEDIUM
mtspr SPRG1,r13
BEGIN_FTR_SECTION
mtspr SPRG2,r12
......@@ -434,6 +439,7 @@ END_FTR_SECTION_IFCLR(CPU_FTR_SLB)
. = 0x380
.globl DataAccessSLB_Pseries
DataAccessSLB_Pseries:
HMT_MEDIUM
mtspr SPRG1,r13
mfspr r13,SPRG3 /* get paca address into r13 */
std r9,PACA_EXSLB+EX_R9(r13) /* save r9 - r12 */
......@@ -461,6 +467,7 @@ DataAccessSLB_Pseries:
. = 0x480
.globl InstructionAccessSLB_Pseries
InstructionAccessSLB_Pseries:
HMT_MEDIUM
mtspr SPRG1,r13
mfspr r13,SPRG3 /* get paca address into r13 */
std r9,PACA_EXSLB+EX_R9(r13) /* save r9 - r12 */
......@@ -494,6 +501,7 @@ InstructionAccessSLB_Pseries:
. = 0xc00
.globl SystemCall_Pseries
SystemCall_Pseries:
HMT_MEDIUM
mr r9,r13
mfmsr r10
mfspr r13,SPRG3
......@@ -747,10 +755,12 @@ fwnmi_data_area:
. = 0x8000
.globl SystemReset_FWNMI
SystemReset_FWNMI:
HMT_MEDIUM
mtspr SPRG1,r13 /* save r13 */
EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, SystemReset_common)
.globl MachineCheck_FWNMI
MachineCheck_FWNMI:
HMT_MEDIUM
mtspr SPRG1,r13 /* save r13 */
EXCEPTION_PROLOG_PSERIES(PACA_EXMC, MachineCheck_common)
......
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