diff options
| -rw-r--r-- | include/hw/ppc/spapr.h | 12 | ||||
| -rw-r--r-- | target/ppc/kvm.c | 58 | ||||
| -rw-r--r-- | target/ppc/kvm_ppc.h | 18 |
3 files changed, 88 insertions, 0 deletions
diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h index 0f5628f22e..eded0ea57d 100644 --- a/include/hw/ppc/spapr.h +++ b/include/hw/ppc/spapr.h @@ -295,6 +295,18 @@ struct sPAPRMachineState { #define H_DABRX_KERNEL (1ULL<<(63-62)) #define H_DABRX_USER (1ULL<<(63-63)) +/* Values for KVM_PPC_GET_CPU_CHAR & H_GET_CPU_CHARACTERISTICS */ +#define H_CPU_CHAR_SPEC_BAR_ORI31 PPC_BIT(0) +#define H_CPU_CHAR_BCCTRL_SERIALISED PPC_BIT(1) +#define H_CPU_CHAR_L1D_FLUSH_ORI30 PPC_BIT(2) +#define H_CPU_CHAR_L1D_FLUSH_TRIG2 PPC_BIT(3) +#define H_CPU_CHAR_L1D_THREAD_PRIV PPC_BIT(4) +#define H_CPU_CHAR_HON_BRANCH_HINTS PPC_BIT(5) +#define H_CPU_CHAR_THR_RECONF_TRIG PPC_BIT(6) +#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) + /* 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 914be687e7..84284d5957 100644 --- a/target/ppc/kvm.c +++ b/target/ppc/kvm.c @@ -89,6 +89,9 @@ static int cap_mmu_radix; static int cap_mmu_hash_v3; static int cap_resize_hpt; static int cap_ppc_pvr_compat; +static int cap_ppc_safe_cache; +static int cap_ppc_safe_bounds_check; +static int cap_ppc_safe_indirect_branch; static uint32_t debug_inst_opcode; @@ -121,6 +124,7 @@ static bool kvmppc_is_pr(KVMState *ks) } static int kvm_ppc_register_host_cpu_type(MachineState *ms); +static void kvmppc_get_cpu_characteristics(KVMState *s); int kvm_arch_init(MachineState *ms, KVMState *s) { @@ -147,6 +151,7 @@ int kvm_arch_init(MachineState *ms, KVMState *s) cap_mmu_radix = kvm_vm_check_extension(s, KVM_CAP_PPC_MMU_RADIX); cap_mmu_hash_v3 = kvm_vm_check_extension(s, KVM_CAP_PPC_MMU_HASH_V3); cap_resize_hpt = kvm_vm_check_extension(s, KVM_CAP_SPAPR_RESIZE_HPT); + kvmppc_get_cpu_characteristics(s); /* * Note: setting it to false because there is not such capability * in KVM at this moment. @@ -2456,6 +2461,59 @@ bool kvmppc_has_cap_mmu_hash_v3(void) return cap_mmu_hash_v3; } +static void kvmppc_get_cpu_characteristics(KVMState *s) +{ + struct kvm_ppc_cpu_char c; + int ret; + + /* Assume broken */ + cap_ppc_safe_cache = 0; + cap_ppc_safe_bounds_check = 0; + cap_ppc_safe_indirect_branch = 0; + + ret = kvm_vm_check_extension(s, KVM_CAP_PPC_GET_CPU_CHAR); + if (!ret) { + return; + } + ret = kvm_vm_ioctl(s, KVM_PPC_GET_CPU_CHAR, &c); + if (ret < 0) { + return; + } + /* Parse and set cap_ppc_safe_cache */ + if (~c.behaviour & c.behaviour_mask & H_CPU_BEHAV_L1D_FLUSH_PR) { + cap_ppc_safe_cache = 2; + } else if ((c.character & c.character_mask & H_CPU_CHAR_L1D_THREAD_PRIV) && + (c.character & c.character_mask + & (H_CPU_CHAR_L1D_FLUSH_ORI30 | H_CPU_CHAR_L1D_FLUSH_TRIG2))) { + cap_ppc_safe_cache = 1; + } + /* Parse and set cap_ppc_safe_bounds_check */ + if (~c.behaviour & c.behaviour_mask & H_CPU_BEHAV_BNDS_CHK_SPEC_BAR) { + cap_ppc_safe_bounds_check = 2; + } else if (c.character & c.character_mask & H_CPU_CHAR_SPEC_BAR_ORI31) { + cap_ppc_safe_bounds_check = 1; + } + /* Parse and set cap_ppc_safe_indirect_branch */ + if (c.character & H_CPU_CHAR_BCCTRL_SERIALISED) { + cap_ppc_safe_indirect_branch = 2; + } +} + +int kvmppc_get_cap_safe_cache(void) +{ + return cap_ppc_safe_cache; +} + +int kvmppc_get_cap_safe_bounds_check(void) +{ + return cap_ppc_safe_bounds_check; +} + +int kvmppc_get_cap_safe_indirect_branch(void) +{ + return cap_ppc_safe_indirect_branch; +} + PowerPCCPUClass *kvm_ppc_get_host_cpu_class(void) { uint32_t host_pvr = mfpvr(); diff --git a/target/ppc/kvm_ppc.h b/target/ppc/kvm_ppc.h index ecb55493cc..39830baa77 100644 --- a/target/ppc/kvm_ppc.h +++ b/target/ppc/kvm_ppc.h @@ -59,6 +59,9 @@ bool kvmppc_has_cap_fixup_hcalls(void); bool kvmppc_has_cap_htm(void); bool kvmppc_has_cap_mmu_radix(void); bool kvmppc_has_cap_mmu_hash_v3(void); +int kvmppc_get_cap_safe_cache(void); +int kvmppc_get_cap_safe_bounds_check(void); +int kvmppc_get_cap_safe_indirect_branch(void); int kvmppc_enable_hwrng(void); int kvmppc_put_books_sregs(PowerPCCPU *cpu); PowerPCCPUClass *kvm_ppc_get_host_cpu_class(void); @@ -290,6 +293,21 @@ static inline bool kvmppc_has_cap_mmu_hash_v3(void) return false; } +static inline int kvmppc_get_cap_safe_cache(void) +{ + return 0; +} + +static inline int kvmppc_get_cap_safe_bounds_check(void) +{ + return 0; +} + +static inline int kvmppc_get_cap_safe_indirect_branch(void) +{ + return 0; +} + static inline int kvmppc_enable_hwrng(void) { return -1; |