target/ppc: Add new PMC HFLAGS

Add 2 new PMC related HFLAGS:
- HFLAGS_PMCJCE - value of MMCR0 PMCjCE bit
- HFLAGS_PMC_OTHER - set if a PMC other than PMC5-6 is enabled

These flags allow further optimization of PMC5 update code, by
allowing frequently tested conditions to be performed at
translation time.

Signed-off-by: Leandro Lupori <leandro.lupori@eldorado.org.br>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20221025202424.195984-3-leandro.lupori@eldorado.org.br>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>

target/ppc/cpu.h

@@ -696,7 +696,9 @@ enum {
     HFLAGS_PR = 14,  /* MSR_PR */
     HFLAGS_PMCC0 = 15,  /* MMCR0 PMCC bit 0 */
     HFLAGS_PMCC1 = 16,  /* MMCR0 PMCC bit 1 */
-    HFLAGS_INSN_CNT = 17, /* PMU instruction count enabled */
+    HFLAGS_PMCJCE = 17, /* MMCR0 PMCjCE bit */
+    HFLAGS_PMC_OTHER = 18, /* PMC other than PMC5-6 is enabled */
+    HFLAGS_INSN_CNT = 19, /* PMU instruction count enabled */
     HFLAGS_VSX = 23, /* MSR_VSX if cpu has VSX */
     HFLAGS_VR = 25,  /* MSR_VR if cpu has VRE */
 

target/ppc/helper_regs.c

@@ -109,6 +109,9 @@ static uint32_t hreg_compute_hflags_value(CPUPPCState *env)
     if (env->spr[SPR_POWER_MMCR0] & MMCR0_PMCC1) {
         hflags |= 1 << HFLAGS_PMCC1;
     }
+    if (env->spr[SPR_POWER_MMCR0] & MMCR0_PMCjCE) {
+        hflags |= 1 << HFLAGS_PMCJCE;
+    }
 
 #ifndef CONFIG_USER_ONLY
     if (!env->has_hv_mode || (msr & (1ull << MSR_HV))) {
@@ -119,6 +122,9 @@ static uint32_t hreg_compute_hflags_value(CPUPPCState *env)
     if (env->pmc_ins_cnt) {
         hflags |= 1 << HFLAGS_INSN_CNT;
     }
+    if (env->pmc_ins_cnt & 0x1e) {
+        hflags |= 1 << HFLAGS_PMC_OTHER;
+    }
 #endif
 
     /*

target/ppc/translate.c

@@ -177,6 +177,8 @@ struct DisasContext {
     bool hr;
     bool mmcr0_pmcc0;
     bool mmcr0_pmcc1;
+    bool mmcr0_pmcjce;
+    bool pmc_other;
     bool pmu_insn_cnt;
     ppc_spr_t *spr_cb; /* Needed to check rights for mfspr/mtspr */
     int singlestep_enabled;
@@ -7512,6 +7514,8 @@ static void ppc_tr_init_disas_context(DisasContextBase *dcbase, CPUState *cs)
     ctx->hr = (hflags >> HFLAGS_HR) & 1;
     ctx->mmcr0_pmcc0 = (hflags >> HFLAGS_PMCC0) & 1;
     ctx->mmcr0_pmcc1 = (hflags >> HFLAGS_PMCC1) & 1;
+    ctx->mmcr0_pmcjce = (hflags >> HFLAGS_PMCJCE) & 1;
+    ctx->pmc_other = (hflags >> HFLAGS_PMC_OTHER) & 1;
     ctx->pmu_insn_cnt = (hflags >> HFLAGS_INSN_CNT) & 1;
 
     ctx->singlestep_enabled = 0;