diff options
Diffstat (limited to 'arch/powerpc/kernel/kvm.c')
| -rw-r--r-- | arch/powerpc/kernel/kvm.c | 204 |
1 files changed, 171 insertions, 33 deletions
diff --git a/arch/powerpc/kernel/kvm.c b/arch/powerpc/kernel/kvm.c index 06b15ee997f..04d4b5aa6dc 100644 --- a/arch/powerpc/kernel/kvm.c +++ b/arch/powerpc/kernel/kvm.c @@ -49,23 +49,17 @@ #define KVM_RT_30 0x03c00000 #define KVM_MASK_RB 0x0000f800 #define KVM_INST_MFMSR 0x7c0000a6 -#define KVM_INST_MFSPR_SPRG0 0x7c1042a6 -#define KVM_INST_MFSPR_SPRG1 0x7c1142a6 -#define KVM_INST_MFSPR_SPRG2 0x7c1242a6 -#define KVM_INST_MFSPR_SPRG3 0x7c1342a6 -#define KVM_INST_MFSPR_SRR0 0x7c1a02a6 -#define KVM_INST_MFSPR_SRR1 0x7c1b02a6 -#define KVM_INST_MFSPR_DAR 0x7c1302a6 -#define KVM_INST_MFSPR_DSISR 0x7c1202a6 - -#define KVM_INST_MTSPR_SPRG0 0x7c1043a6 -#define KVM_INST_MTSPR_SPRG1 0x7c1143a6 -#define KVM_INST_MTSPR_SPRG2 0x7c1243a6 -#define KVM_INST_MTSPR_SPRG3 0x7c1343a6 -#define KVM_INST_MTSPR_SRR0 0x7c1a03a6 -#define KVM_INST_MTSPR_SRR1 0x7c1b03a6 -#define KVM_INST_MTSPR_DAR 0x7c1303a6 -#define KVM_INST_MTSPR_DSISR 0x7c1203a6 + +#define SPR_FROM 0 +#define SPR_TO 0x100 + +#define KVM_INST_SPR(sprn, moveto) (0x7c0002a6 | \ + (((sprn) & 0x1f) << 16) | \ + (((sprn) & 0x3e0) << 6) | \ + (moveto)) + +#define KVM_INST_MFSPR(sprn) KVM_INST_SPR(sprn, SPR_FROM) +#define KVM_INST_MTSPR(sprn) KVM_INST_SPR(sprn, SPR_TO) #define KVM_INST_TLBSYNC 0x7c00046c #define KVM_INST_MTMSRD_L0 0x7c000164 @@ -440,56 +434,191 @@ static void kvm_check_ins(u32 *inst, u32 features) case KVM_INST_MFMSR: kvm_patch_ins_ld(inst, magic_var(msr), inst_rt); break; - case KVM_INST_MFSPR_SPRG0: + case KVM_INST_MFSPR(SPRN_SPRG0): kvm_patch_ins_ld(inst, magic_var(sprg0), inst_rt); break; - case KVM_INST_MFSPR_SPRG1: + case KVM_INST_MFSPR(SPRN_SPRG1): kvm_patch_ins_ld(inst, magic_var(sprg1), inst_rt); break; - case KVM_INST_MFSPR_SPRG2: + case KVM_INST_MFSPR(SPRN_SPRG2): kvm_patch_ins_ld(inst, magic_var(sprg2), inst_rt); break; - case KVM_INST_MFSPR_SPRG3: + case KVM_INST_MFSPR(SPRN_SPRG3): kvm_patch_ins_ld(inst, magic_var(sprg3), inst_rt); break; - case KVM_INST_MFSPR_SRR0: + case KVM_INST_MFSPR(SPRN_SRR0): kvm_patch_ins_ld(inst, magic_var(srr0), inst_rt); break; - case KVM_INST_MFSPR_SRR1: + case KVM_INST_MFSPR(SPRN_SRR1): kvm_patch_ins_ld(inst, magic_var(srr1), inst_rt); break; - case KVM_INST_MFSPR_DAR: +#ifdef CONFIG_BOOKE + case KVM_INST_MFSPR(SPRN_DEAR): +#else + case KVM_INST_MFSPR(SPRN_DAR): +#endif kvm_patch_ins_ld(inst, magic_var(dar), inst_rt); break; - case KVM_INST_MFSPR_DSISR: + case KVM_INST_MFSPR(SPRN_DSISR): kvm_patch_ins_lwz(inst, magic_var(dsisr), inst_rt); break; +#ifdef CONFIG_PPC_BOOK3E_MMU + case KVM_INST_MFSPR(SPRN_MAS0): + if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7) + kvm_patch_ins_lwz(inst, magic_var(mas0), inst_rt); + break; + case KVM_INST_MFSPR(SPRN_MAS1): + if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7) + kvm_patch_ins_lwz(inst, magic_var(mas1), inst_rt); + break; + case KVM_INST_MFSPR(SPRN_MAS2): + if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7) + kvm_patch_ins_ld(inst, magic_var(mas2), inst_rt); + break; + case KVM_INST_MFSPR(SPRN_MAS3): + if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7) + kvm_patch_ins_lwz(inst, magic_var(mas7_3) + 4, inst_rt); + break; + case KVM_INST_MFSPR(SPRN_MAS4): + if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7) + kvm_patch_ins_lwz(inst, magic_var(mas4), inst_rt); + break; + case KVM_INST_MFSPR(SPRN_MAS6): + if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7) + kvm_patch_ins_lwz(inst, magic_var(mas6), inst_rt); + break; + case KVM_INST_MFSPR(SPRN_MAS7): + if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7) + kvm_patch_ins_lwz(inst, magic_var(mas7_3), inst_rt); + break; +#endif /* CONFIG_PPC_BOOK3E_MMU */ + + case KVM_INST_MFSPR(SPRN_SPRG4): +#ifdef CONFIG_BOOKE + case KVM_INST_MFSPR(SPRN_SPRG4R): +#endif + if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7) + kvm_patch_ins_ld(inst, magic_var(sprg4), inst_rt); + break; + case KVM_INST_MFSPR(SPRN_SPRG5): +#ifdef CONFIG_BOOKE + case KVM_INST_MFSPR(SPRN_SPRG5R): +#endif + if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7) + kvm_patch_ins_ld(inst, magic_var(sprg5), inst_rt); + break; + case KVM_INST_MFSPR(SPRN_SPRG6): +#ifdef CONFIG_BOOKE + case KVM_INST_MFSPR(SPRN_SPRG6R): +#endif + if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7) + kvm_patch_ins_ld(inst, magic_var(sprg6), inst_rt); + break; + case KVM_INST_MFSPR(SPRN_SPRG7): +#ifdef CONFIG_BOOKE + case KVM_INST_MFSPR(SPRN_SPRG7R): +#endif + if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7) + kvm_patch_ins_ld(inst, magic_var(sprg7), inst_rt); + break; + +#ifdef CONFIG_BOOKE + case KVM_INST_MFSPR(SPRN_ESR): + if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7) + kvm_patch_ins_lwz(inst, magic_var(esr), inst_rt); + break; +#endif + + case KVM_INST_MFSPR(SPRN_PIR): + if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7) + kvm_patch_ins_lwz(inst, magic_var(pir), inst_rt); + break; + + /* Stores */ - case KVM_INST_MTSPR_SPRG0: + case KVM_INST_MTSPR(SPRN_SPRG0): kvm_patch_ins_std(inst, magic_var(sprg0), inst_rt); break; - case KVM_INST_MTSPR_SPRG1: + case KVM_INST_MTSPR(SPRN_SPRG1): kvm_patch_ins_std(inst, magic_var(sprg1), inst_rt); break; - case KVM_INST_MTSPR_SPRG2: + case KVM_INST_MTSPR(SPRN_SPRG2): kvm_patch_ins_std(inst, magic_var(sprg2), inst_rt); break; - case KVM_INST_MTSPR_SPRG3: + case KVM_INST_MTSPR(SPRN_SPRG3): kvm_patch_ins_std(inst, magic_var(sprg3), inst_rt); break; - case KVM_INST_MTSPR_SRR0: + case KVM_INST_MTSPR(SPRN_SRR0): kvm_patch_ins_std(inst, magic_var(srr0), inst_rt); break; - case KVM_INST_MTSPR_SRR1: + case KVM_INST_MTSPR(SPRN_SRR1): kvm_patch_ins_std(inst, magic_var(srr1), inst_rt); break; - case KVM_INST_MTSPR_DAR: +#ifdef CONFIG_BOOKE + case KVM_INST_MTSPR(SPRN_DEAR): +#else + case KVM_INST_MTSPR(SPRN_DAR): +#endif kvm_patch_ins_std(inst, magic_var(dar), inst_rt); break; - case KVM_INST_MTSPR_DSISR: + case KVM_INST_MTSPR(SPRN_DSISR): kvm_patch_ins_stw(inst, magic_var(dsisr), inst_rt); break; +#ifdef CONFIG_PPC_BOOK3E_MMU + case KVM_INST_MTSPR(SPRN_MAS0): + if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7) + kvm_patch_ins_stw(inst, magic_var(mas0), inst_rt); + break; + case KVM_INST_MTSPR(SPRN_MAS1): + if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7) + kvm_patch_ins_stw(inst, magic_var(mas1), inst_rt); + break; + case KVM_INST_MTSPR(SPRN_MAS2): + if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7) + kvm_patch_ins_std(inst, magic_var(mas2), inst_rt); + break; + case KVM_INST_MTSPR(SPRN_MAS3): + if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7) + kvm_patch_ins_stw(inst, magic_var(mas7_3) + 4, inst_rt); + break; + case KVM_INST_MTSPR(SPRN_MAS4): + if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7) + kvm_patch_ins_stw(inst, magic_var(mas4), inst_rt); + break; + case KVM_INST_MTSPR(SPRN_MAS6): + if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7) + kvm_patch_ins_stw(inst, magic_var(mas6), inst_rt); + break; + case KVM_INST_MTSPR(SPRN_MAS7): + if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7) + kvm_patch_ins_stw(inst, magic_var(mas7_3), inst_rt); + break; +#endif /* CONFIG_PPC_BOOK3E_MMU */ + + case KVM_INST_MTSPR(SPRN_SPRG4): + if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7) + kvm_patch_ins_std(inst, magic_var(sprg4), inst_rt); + break; + case KVM_INST_MTSPR(SPRN_SPRG5): + if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7) + kvm_patch_ins_std(inst, magic_var(sprg5), inst_rt); + break; + case KVM_INST_MTSPR(SPRN_SPRG6): + if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7) + kvm_patch_ins_std(inst, magic_var(sprg6), inst_rt); + break; + case KVM_INST_MTSPR(SPRN_SPRG7): + if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7) + kvm_patch_ins_std(inst, magic_var(sprg7), inst_rt); + break; + +#ifdef CONFIG_BOOKE + case KVM_INST_MTSPR(SPRN_ESR): + if (features & KVM_MAGIC_FEAT_MAS0_TO_SPRG7) + kvm_patch_ins_stw(inst, magic_var(esr), inst_rt); + break; +#endif /* Nops */ case KVM_INST_TLBSYNC: @@ -556,9 +685,18 @@ static void kvm_use_magic_page(void) start = (void*)_stext; end = (void*)_etext; + /* + * Being interrupted in the middle of patching would + * be bad for SPRG4-7, which KVM can't keep in sync + * with emulated accesses because reads don't trap. + */ + local_irq_disable(); + for (p = start; p < end; p++) kvm_check_ins(p, features); + local_irq_enable(); + printk(KERN_INFO "KVM: Live patching for a fast VM %s\n", kvm_patching_worked ? "worked" : "failed"); } |