diff options
| -rw-r--r-- | arch/arm64/include/asm/kvm_host.h | 1 | ||||
| -rw-r--r-- | arch/arm64/kvm/config.c | 29 | ||||
| -rw-r--r-- | arch/arm64/kvm/sys_regs.c | 2 |
3 files changed, 32 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 9386f15cdc25..59bfb049ce98 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -1611,5 +1611,6 @@ void kvm_set_vm_id_reg(struct kvm *kvm, u32 reg, u64 val); (kvm_has_feat((k), ID_AA64MMFR3_EL1, S1POE, IMP)) void compute_fgu(struct kvm *kvm, enum fgt_group_id fgt); +void check_feature_map(void); #endif /* __ARM64_KVM_HOST_H__ */ diff --git a/arch/arm64/kvm/config.c b/arch/arm64/kvm/config.c index 9a29d298aae7..0c44a3d85872 100644 --- a/arch/arm64/kvm/config.c +++ b/arch/arm64/kvm/config.c @@ -494,6 +494,35 @@ static const struct reg_bits_to_feat_map hafgrtr_feat_map[] = { FEAT_AMUv1), }; +static void __init check_feat_map(const struct reg_bits_to_feat_map *map, + int map_size, u64 res0, const char *str) +{ + u64 mask = 0; + + for (int i = 0; i < map_size; i++) + mask |= map[i].bits; + + if (mask != ~res0) + kvm_err("Undefined %s behaviour, bits %016llx\n", + str, mask ^ ~res0); +} + +void __init check_feature_map(void) +{ + check_feat_map(hfgrtr_feat_map, ARRAY_SIZE(hfgrtr_feat_map), + hfgrtr_masks.res0, hfgrtr_masks.str); + check_feat_map(hfgwtr_feat_map, ARRAY_SIZE(hfgwtr_feat_map), + hfgwtr_masks.res0, hfgwtr_masks.str); + check_feat_map(hfgitr_feat_map, ARRAY_SIZE(hfgitr_feat_map), + hfgitr_masks.res0, hfgitr_masks.str); + check_feat_map(hdfgrtr_feat_map, ARRAY_SIZE(hdfgrtr_feat_map), + hdfgrtr_masks.res0, hdfgrtr_masks.str); + check_feat_map(hdfgwtr_feat_map, ARRAY_SIZE(hdfgwtr_feat_map), + hdfgwtr_masks.res0, hdfgwtr_masks.str); + check_feat_map(hafgrtr_feat_map, ARRAY_SIZE(hafgrtr_feat_map), + hafgrtr_masks.res0, hafgrtr_masks.str); +} + static bool idreg_feat_match(struct kvm *kvm, const struct reg_bits_to_feat_map *map) { u64 regval = kvm->arch.id_regs[map->regidx]; diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index b3e53a899c1f..f24d1a7d9a8f 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -5208,6 +5208,8 @@ int __init kvm_sys_reg_table_init(void) ret = populate_nv_trap_config(); + check_feature_map(); + for (i = 0; !ret && i < ARRAY_SIZE(sys_reg_descs); i++) ret = populate_sysreg_config(sys_reg_descs + i, i); |