diff options
| -rw-r--r-- | target/ppc/cpu.h | 7 | ||||
| -rw-r--r-- | target/ppc/cpu_init.c | 2 | ||||
| -rw-r--r-- | target/ppc/power8-pmu-regs.c.inc | 116 | ||||
| -rw-r--r-- | target/ppc/spr_tcg.h | 2 | ||||
| -rw-r--r-- | target/ppc/translate.c | 2 |
5 files changed, 128 insertions, 1 deletions
diff --git a/target/ppc/cpu.h b/target/ppc/cpu.h index 24d1f2cf97..0bd008f4b8 100644 --- a/target/ppc/cpu.h +++ b/target/ppc/cpu.h @@ -344,8 +344,15 @@ typedef struct ppc_v3_pate_t { #define MSR_LE 0 /* Little-endian mode 1 hflags */ /* PMU bits */ +#define MMCR0_FC PPC_BIT(32) /* Freeze Counters */ +#define MMCR0_PMAO PPC_BIT(56) /* Perf Monitor Alert Ocurred */ +#define MMCR0_PMAE PPC_BIT(37) /* Perf Monitor Alert Enable */ +#define MMCR0_EBE PPC_BIT(43) /* Perf Monitor EBB Enable */ +#define MMCR0_FCECE PPC_BIT(38) /* FC on Enabled Cond or Event */ #define MMCR0_PMCC0 PPC_BIT(44) /* PMC Control bit 0 */ #define MMCR0_PMCC1 PPC_BIT(45) /* PMC Control bit 1 */ +/* MMCR0 userspace r/w mask */ +#define MMCR0_UREG_MASK (MMCR0_FC | MMCR0_PMAO | MMCR0_PMAE) /* LPCR bits */ #define LPCR_VPM0 PPC_BIT(0) diff --git a/target/ppc/cpu_init.c b/target/ppc/cpu_init.c index 6aad01d1d3..375bdca1e1 100644 --- a/target/ppc/cpu_init.c +++ b/target/ppc/cpu_init.c @@ -6867,7 +6867,7 @@ static void register_book3s_pmu_sup_sprs(CPUPPCState *env) static void register_book3s_pmu_user_sprs(CPUPPCState *env) { spr_register(env, SPR_POWER_UMMCR0, "UMMCR0", - &spr_read_ureg, SPR_NOACCESS, + &spr_read_MMCR0_ureg, &spr_write_MMCR0_ureg, &spr_read_ureg, &spr_write_ureg, 0x00000000); spr_register(env, SPR_POWER_UMMCR1, "UMMCR1", diff --git a/target/ppc/power8-pmu-regs.c.inc b/target/ppc/power8-pmu-regs.c.inc new file mode 100644 index 0000000000..37c812dd4d --- /dev/null +++ b/target/ppc/power8-pmu-regs.c.inc @@ -0,0 +1,116 @@ +/* + * PMU register read/write functions for TCG IBM POWER chips + * + * Copyright IBM Corp. 2021 + * + * Authors: + * Daniel Henrique Barboza <danielhb413@gmail.com> + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + */ + +#if defined(TARGET_PPC64) && !defined(CONFIG_USER_ONLY) + +/* + * Checks whether the Group A SPR (MMCR0, MMCR2, MMCRA, and the + * PMCs) has problem state read access. + * + * Read acccess is granted for all PMCC values but 0b01, where a + * Facility Unavailable Interrupt will occur. + */ +static bool spr_groupA_read_allowed(DisasContext *ctx) +{ + if (!ctx->mmcr0_pmcc0 && ctx->mmcr0_pmcc1) { + gen_hvpriv_exception(ctx, POWERPC_EXCP_FU); + return false; + } + + return true; +} + +/* + * Checks whether the Group A SPR (MMCR0, MMCR2, MMCRA, and the + * PMCs) has problem state write access. + * + * Write acccess is granted for PMCC values 0b10 and 0b11. Userspace + * writing with PMCC 0b00 will generate a Hypervisor Emulation + * Assistance Interrupt. Userspace writing with PMCC 0b01 will + * generate a Facility Unavailable Interrupt. + */ +static bool spr_groupA_write_allowed(DisasContext *ctx) +{ + if (ctx->mmcr0_pmcc0) { + return true; + } + + if (ctx->mmcr0_pmcc1) { + /* PMCC = 0b01 */ + gen_hvpriv_exception(ctx, POWERPC_EXCP_FU); + } else { + /* PMCC = 0b00 */ + gen_hvpriv_exception(ctx, POWERPC_EXCP_INVAL_SPR); + } + + return false; +} + +void spr_read_MMCR0_ureg(DisasContext *ctx, int gprn, int sprn) +{ + TCGv t0; + + if (!spr_groupA_read_allowed(ctx)) { + return; + } + + t0 = tcg_temp_new(); + + /* + * Filter out all bits but FC, PMAO, and PMAE, according + * to ISA v3.1, in 10.4.4 Monitor Mode Control Register 0, + * fourth paragraph. + */ + gen_load_spr(t0, SPR_POWER_MMCR0); + tcg_gen_andi_tl(t0, t0, MMCR0_UREG_MASK); + tcg_gen_mov_tl(cpu_gpr[gprn], t0); + + tcg_temp_free(t0); +} + +void spr_write_MMCR0_ureg(DisasContext *ctx, int sprn, int gprn) +{ + TCGv t0, t1; + + if (!spr_groupA_write_allowed(ctx)) { + return; + } + + t0 = tcg_temp_new(); + t1 = tcg_temp_new(); + + /* + * Filter out all bits but FC, PMAO, and PMAE, according + * to ISA v3.1, in 10.4.4 Monitor Mode Control Register 0, + * fourth paragraph. + */ + tcg_gen_andi_tl(t0, cpu_gpr[gprn], MMCR0_UREG_MASK); + gen_load_spr(t1, SPR_POWER_MMCR0); + tcg_gen_andi_tl(t1, t1, ~(MMCR0_UREG_MASK)); + /* Keep all other bits intact */ + tcg_gen_or_tl(t1, t1, t0); + gen_store_spr(SPR_POWER_MMCR0, t1); + + tcg_temp_free(t0); + tcg_temp_free(t1); +} +#else +void spr_read_MMCR0_ureg(DisasContext *ctx, int gprn, int sprn) +{ + spr_read_ureg(ctx, gprn, sprn); +} + +void spr_write_MMCR0_ureg(DisasContext *ctx, int sprn, int gprn) +{ + spr_noaccess(ctx, gprn, sprn); +} +#endif /* defined(TARGET_PPC64) && !defined(CONFIG_USER_ONLY) */ diff --git a/target/ppc/spr_tcg.h b/target/ppc/spr_tcg.h index 0be5f347d5..b28b095097 100644 --- a/target/ppc/spr_tcg.h +++ b/target/ppc/spr_tcg.h @@ -32,6 +32,7 @@ void spr_write_lr(DisasContext *ctx, int sprn, int gprn); void spr_read_ctr(DisasContext *ctx, int gprn, int sprn); void spr_write_ctr(DisasContext *ctx, int sprn, int gprn); void spr_read_ureg(DisasContext *ctx, int gprn, int sprn); +void spr_read_MMCR0_ureg(DisasContext *ctx, int gprn, int sprn); void spr_read_tbl(DisasContext *ctx, int gprn, int sprn); void spr_read_tbu(DisasContext *ctx, int gprn, int sprn); void spr_read_atbl(DisasContext *ctx, int gprn, int sprn); @@ -40,6 +41,7 @@ void spr_read_601_rtcl(DisasContext *ctx, int gprn, int sprn); void spr_read_601_rtcu(DisasContext *ctx, int gprn, int sprn); void spr_read_spefscr(DisasContext *ctx, int gprn, int sprn); void spr_write_spefscr(DisasContext *ctx, int sprn, int gprn); +void spr_write_MMCR0_ureg(DisasContext *ctx, int sprn, int gprn); #ifndef CONFIG_USER_ONLY void spr_write_generic32(DisasContext *ctx, int sprn, int gprn); diff --git a/target/ppc/translate.c b/target/ppc/translate.c index a4c5ef3701..518337bcb7 100644 --- a/target/ppc/translate.c +++ b/target/ppc/translate.c @@ -7486,6 +7486,8 @@ static int times_4(DisasContext *ctx, int x) #include "decode-insn32.c.inc" #include "decode-insn64.c.inc" +#include "power8-pmu-regs.c.inc" + #include "translate/fixedpoint-impl.c.inc" #include "translate/fp-impl.c.inc" |