diff options
Diffstat (limited to 'arch/powerpc/platforms/pseries/hvCall.S')
| -rw-r--r-- | arch/powerpc/platforms/pseries/hvCall.S | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/pseries/hvCall.S b/arch/powerpc/platforms/pseries/hvCall.S index 9a99b056bd2..c00cfed7af2 100644 --- a/arch/powerpc/platforms/pseries/hvCall.S +++ b/arch/powerpc/platforms/pseries/hvCall.S @@ -10,9 +10,69 @@ #include <asm/hvcall.h> #include <asm/processor.h> #include <asm/ppc_asm.h> +#include <asm/asm-offsets.h> #define STK_PARM(i) (48 + ((i)-3)*8) +#ifdef CONFIG_HCALL_STATS +/* + * precall must preserve all registers. use unused STK_PARM() + * areas to save snapshots and opcode. + */ +#define HCALL_INST_PRECALL \ + std r3,STK_PARM(r3)(r1); /* save opcode */ \ + mftb r0; /* get timebase and */ \ + std r0,STK_PARM(r5)(r1); /* save for later */ \ +BEGIN_FTR_SECTION; \ + mfspr r0,SPRN_PURR; /* get PURR and */ \ + std r0,STK_PARM(r6)(r1); /* save for later */ \ +END_FTR_SECTION_IFCLR(CPU_FTR_PURR); + +/* + * postcall is performed immediately before function return which + * allows liberal use of volatile registers. + */ +#define HCALL_INST_POSTCALL \ + ld r4,STK_PARM(r3)(r1); /* validate opcode */ \ + cmpldi cr7,r4,MAX_HCALL_OPCODE; \ + bgt- cr7,1f; \ + \ + /* get time and PURR snapshots after hcall */ \ + mftb r7; /* timebase after */ \ +BEGIN_FTR_SECTION; \ + mfspr r8,SPRN_PURR; /* PURR after */ \ + ld r6,STK_PARM(r6)(r1); /* PURR before */ \ + subf r6,r6,r8; /* delta */ \ +END_FTR_SECTION_IFCLR(CPU_FTR_PURR); \ + ld r5,STK_PARM(r5)(r1); /* timebase before */ \ + subf r5,r5,r7; /* time delta */ \ + \ + /* calculate address of stat structure r4 = opcode */ \ + srdi r4,r4,2; /* index into array */ \ + mulli r4,r4,HCALL_STAT_SIZE; \ + LOAD_REG_ADDR(r7, per_cpu__hcall_stats); \ + add r4,r4,r7; \ + ld r7,PACA_DATA_OFFSET(r13); /* per cpu offset */ \ + add r4,r4,r7; \ + \ + /* update stats */ \ + ld r7,HCALL_STAT_CALLS(r4); /* count */ \ + addi r7,r7,1; \ + std r7,HCALL_STAT_CALLS(r4); \ + ld r7,HCALL_STAT_TB(r4); /* timebase */ \ + add r7,r7,r5; \ + std r7,HCALL_STAT_TB(r4); \ +BEGIN_FTR_SECTION; \ + ld r7,HCALL_STAT_PURR(r4); /* PURR */ \ + add r7,r7,r6; \ + std r7,HCALL_STAT_PURR(r4); \ +END_FTR_SECTION_IFCLR(CPU_FTR_PURR); \ +1: +#else +#define HCALL_INST_PRECALL +#define HCALL_INST_POSTCALL +#endif + .text _GLOBAL(plpar_hcall_norets) @@ -21,8 +81,12 @@ _GLOBAL(plpar_hcall_norets) mfcr r0 stw r0,8(r1) + HCALL_INST_PRECALL + HVSC /* invoke the hypervisor */ + HCALL_INST_POSTCALL + lwz r0,8(r1) mtcrf 0xff,r0 blr /* return r3 = status */ @@ -33,6 +97,8 @@ _GLOBAL(plpar_hcall) mfcr r0 stw r0,8(r1) + HCALL_INST_PRECALL + std r4,STK_PARM(r4)(r1) /* Save ret buffer */ mr r4,r5 @@ -50,6 +116,8 @@ _GLOBAL(plpar_hcall) std r6, 16(r12) std r7, 24(r12) + HCALL_INST_POSTCALL + lwz r0,8(r1) mtcrf 0xff,r0 @@ -61,6 +129,8 @@ _GLOBAL(plpar_hcall9) mfcr r0 stw r0,8(r1) + HCALL_INST_PRECALL + std r4,STK_PARM(r4)(r1) /* Save ret buffer */ mr r4,r5 @@ -86,6 +156,8 @@ _GLOBAL(plpar_hcall9) std r11,56(r12) std r12,64(r12) + HCALL_INST_POSTCALL + lwz r0,8(r1) mtcrf 0xff,r0 |