diff options
| -rw-r--r-- | hw/ppc/spapr_caps.c | 21 | ||||
| -rw-r--r-- | hw/ppc/spapr_hcall.c | 5 | ||||
| -rw-r--r-- | include/hw/ppc/spapr.h | 7 | ||||
| -rw-r--r-- | target/ppc/kvm.c | 8 |
4 files changed, 29 insertions, 12 deletions
diff --git a/hw/ppc/spapr_caps.c b/hw/ppc/spapr_caps.c index faab472d06..ca35b5153d 100644 --- a/hw/ppc/spapr_caps.c +++ b/hw/ppc/spapr_caps.c @@ -276,11 +276,13 @@ static void cap_safe_bounds_check_apply(sPAPRMachineState *spapr, uint8_t val, } sPAPRCapPossible cap_ibs_possible = { - .num = 4, + .num = 5, /* Note workaround only maintained for compatibility */ - .vals = {"broken", "workaround", "fixed-ibs", "fixed-ccd"}, - .help = "broken - no protection, fixed-ibs - indirect branch serialisation," - " fixed-ccd - cache count disabled", + .vals = {"broken", "workaround", "fixed-ibs", "fixed-ccd", "fixed-na"}, + .help = "broken - no protection, workaround - count cache flush" + ", fixed-ibs - indirect branch serialisation," + " fixed-ccd - cache count disabled," + " fixed-na - fixed in hardware (no longer applicable)", }; static void cap_safe_indirect_branch_apply(sPAPRMachineState *spapr, @@ -288,15 +290,11 @@ static void cap_safe_indirect_branch_apply(sPAPRMachineState *spapr, { uint8_t kvm_val = kvmppc_get_cap_safe_indirect_branch(); - if (val == SPAPR_CAP_WORKAROUND) { /* Can only be Broken or Fixed */ - error_setg(errp, -"Requested safe indirect branch capability level \"workaround\" not valid, try cap-ibs=%s", - cap_ibs_possible.vals[kvm_val]); - } else if (tcg_enabled() && val) { + if (tcg_enabled() && val) { /* TODO - for now only allow broken for TCG */ error_setg(errp, "Requested safe indirect branch capability level not supported by tcg, try a different value for cap-ibs"); - } else if (kvm_enabled() && val && (val != kvm_val)) { + } else if (kvm_enabled() && (val > kvm_val)) { error_setg(errp, "Requested safe indirect branch capability level not supported by kvm, try cap-ibs=%s", cap_ibs_possible.vals[kvm_val]); @@ -494,7 +492,8 @@ sPAPRCapabilityInfo capability_table[SPAPR_CAP_NUM] = { [SPAPR_CAP_IBS] = { .name = "ibs", .description = - "Indirect Branch Speculation (broken, fixed-ibs, fixed-ccd)", + "Indirect Branch Speculation (broken, workaround, fixed-ibs," + "fixed-ccd, fixed-na)", .index = SPAPR_CAP_IBS, .get = spapr_cap_get_string, .set = spapr_cap_set_string, diff --git a/hw/ppc/spapr_hcall.c b/hw/ppc/spapr_hcall.c index 476bad6271..4aa8036fc0 100644 --- a/hw/ppc/spapr_hcall.c +++ b/hw/ppc/spapr_hcall.c @@ -1723,12 +1723,17 @@ static target_ulong h_get_cpu_characteristics(PowerPCCPU *cpu, } switch (safe_indirect_branch) { + case SPAPR_CAP_FIXED_NA: + break; case SPAPR_CAP_FIXED_CCD: characteristics |= H_CPU_CHAR_CACHE_COUNT_DIS; break; case SPAPR_CAP_FIXED_IBS: characteristics |= H_CPU_CHAR_BCCTRL_SERIALISED; break; + case SPAPR_CAP_WORKAROUND: + behaviour |= H_CPU_BEHAV_FLUSH_COUNT_CACHE; + break; default: /* broken */ assert(safe_indirect_branch == SPAPR_CAP_BROKEN); break; diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h index 8efc5e0779..a7f3b1bfdd 100644 --- a/include/hw/ppc/spapr.h +++ b/include/hw/ppc/spapr.h @@ -85,12 +85,17 @@ typedef enum { /* Bool Caps */ #define SPAPR_CAP_OFF 0x00 #define SPAPR_CAP_ON 0x01 + /* Custom Caps */ + +/* Generic */ #define SPAPR_CAP_BROKEN 0x00 #define SPAPR_CAP_WORKAROUND 0x01 #define SPAPR_CAP_FIXED 0x02 +/* SPAPR_CAP_IBS (cap-ibs) */ #define SPAPR_CAP_FIXED_IBS 0x02 #define SPAPR_CAP_FIXED_CCD 0x03 +#define SPAPR_CAP_FIXED_NA 0x10 /* Lets leave a bit of a gap... */ typedef struct sPAPRCapabilities sPAPRCapabilities; struct sPAPRCapabilities { @@ -339,9 +344,11 @@ struct sPAPRMachineState { #define H_CPU_CHAR_HON_BRANCH_HINTS PPC_BIT(5) #define H_CPU_CHAR_THR_RECONF_TRIG PPC_BIT(6) #define H_CPU_CHAR_CACHE_COUNT_DIS PPC_BIT(7) +#define H_CPU_CHAR_BCCTR_FLUSH_ASSIST PPC_BIT(9) #define H_CPU_BEHAV_FAVOUR_SECURITY PPC_BIT(0) #define H_CPU_BEHAV_L1D_FLUSH_PR PPC_BIT(1) #define H_CPU_BEHAV_BNDS_CHK_SPEC_BAR PPC_BIT(2) +#define H_CPU_BEHAV_FLUSH_COUNT_CACHE PPC_BIT(5) /* Each control block has to be on a 4K boundary */ #define H_CB_ALIGNMENT 4096 diff --git a/target/ppc/kvm.c b/target/ppc/kvm.c index f0f5bf9391..4d46314276 100644 --- a/target/ppc/kvm.c +++ b/target/ppc/kvm.c @@ -2392,7 +2392,13 @@ static int parse_cap_ppc_safe_bounds_check(struct kvm_ppc_cpu_char c) static int parse_cap_ppc_safe_indirect_branch(struct kvm_ppc_cpu_char c) { - if (c.character & c.character_mask & H_CPU_CHAR_CACHE_COUNT_DIS) { + if ((~c.behaviour & c.behaviour_mask & H_CPU_BEHAV_FLUSH_COUNT_CACHE) && + (~c.character & c.character_mask & H_CPU_CHAR_CACHE_COUNT_DIS) && + (~c.character & c.character_mask & H_CPU_CHAR_BCCTRL_SERIALISED)) { + return SPAPR_CAP_FIXED_NA; + } else if (c.behaviour & c.behaviour_mask & H_CPU_BEHAV_FLUSH_COUNT_CACHE) { + return SPAPR_CAP_WORKAROUND; + } else if (c.character & c.character_mask & H_CPU_CHAR_CACHE_COUNT_DIS) { return SPAPR_CAP_FIXED_CCD; } else if (c.character & c.character_mask & H_CPU_CHAR_BCCTRL_SERIALISED) { return SPAPR_CAP_FIXED_IBS; |