diff options
Diffstat (limited to 'arch/powerpc/kernel/kvm.c')
| -rw-r--r-- | arch/powerpc/kernel/kvm.c | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/kvm.c b/arch/powerpc/kernel/kvm.c index e93366fbbd21..9ec572c4d2a5 100644 --- a/arch/powerpc/kernel/kvm.c +++ b/arch/powerpc/kernel/kvm.c @@ -33,7 +33,34 @@ #define KVM_MAGIC_PAGE (-4096L) #define magic_var(x) KVM_MAGIC_PAGE + offsetof(struct kvm_vcpu_arch_shared, x) +#define KVM_INST_LWZ 0x80000000 +#define KVM_INST_STW 0x90000000 +#define KVM_INST_LD 0xe8000000 +#define KVM_INST_STD 0xf8000000 +#define KVM_INST_NOP 0x60000000 +#define KVM_INST_B 0x48000000 +#define KVM_INST_B_MASK 0x03ffffff +#define KVM_INST_B_MAX 0x01ffffff + #define KVM_MASK_RT 0x03e00000 +#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 static bool kvm_patching_worked = true; @@ -43,6 +70,34 @@ static inline void kvm_patch_ins(u32 *inst, u32 new_inst) flush_icache_range((ulong)inst, (ulong)inst + 4); } +static void kvm_patch_ins_ld(u32 *inst, long addr, u32 rt) +{ +#ifdef CONFIG_64BIT + kvm_patch_ins(inst, KVM_INST_LD | rt | (addr & 0x0000fffc)); +#else + kvm_patch_ins(inst, KVM_INST_LWZ | rt | ((addr + 4) & 0x0000fffc)); +#endif +} + +static void kvm_patch_ins_lwz(u32 *inst, long addr, u32 rt) +{ + kvm_patch_ins(inst, KVM_INST_LWZ | rt | (addr & 0x0000ffff)); +} + +static void kvm_patch_ins_std(u32 *inst, long addr, u32 rt) +{ +#ifdef CONFIG_64BIT + kvm_patch_ins(inst, KVM_INST_STD | rt | (addr & 0x0000fffc)); +#else + kvm_patch_ins(inst, KVM_INST_STW | rt | ((addr + 4) & 0x0000fffc)); +#endif +} + +static void kvm_patch_ins_stw(u32 *inst, long addr, u32 rt) +{ + kvm_patch_ins(inst, KVM_INST_STW | rt | (addr & 0x0000fffc)); +} + static void kvm_map_magic_page(void *data) { kvm_hypercall2(KVM_HC_PPC_MAP_MAGIC_PAGE, @@ -57,6 +112,60 @@ static void kvm_check_ins(u32 *inst) u32 inst_rt = _inst & KVM_MASK_RT; switch (inst_no_rt) { + /* Loads */ + case KVM_INST_MFMSR: + kvm_patch_ins_ld(inst, magic_var(msr), inst_rt); + break; + case KVM_INST_MFSPR_SPRG0: + kvm_patch_ins_ld(inst, magic_var(sprg0), inst_rt); + break; + case KVM_INST_MFSPR_SPRG1: + kvm_patch_ins_ld(inst, magic_var(sprg1), inst_rt); + break; + case KVM_INST_MFSPR_SPRG2: + kvm_patch_ins_ld(inst, magic_var(sprg2), inst_rt); + break; + case KVM_INST_MFSPR_SPRG3: + kvm_patch_ins_ld(inst, magic_var(sprg3), inst_rt); + break; + case KVM_INST_MFSPR_SRR0: + kvm_patch_ins_ld(inst, magic_var(srr0), inst_rt); + break; + case KVM_INST_MFSPR_SRR1: + kvm_patch_ins_ld(inst, magic_var(srr1), inst_rt); + break; + case KVM_INST_MFSPR_DAR: + kvm_patch_ins_ld(inst, magic_var(dar), inst_rt); + break; + case KVM_INST_MFSPR_DSISR: + kvm_patch_ins_lwz(inst, magic_var(dsisr), inst_rt); + break; + + /* Stores */ + case KVM_INST_MTSPR_SPRG0: + kvm_patch_ins_std(inst, magic_var(sprg0), inst_rt); + break; + case KVM_INST_MTSPR_SPRG1: + kvm_patch_ins_std(inst, magic_var(sprg1), inst_rt); + break; + case KVM_INST_MTSPR_SPRG2: + kvm_patch_ins_std(inst, magic_var(sprg2), inst_rt); + break; + case KVM_INST_MTSPR_SPRG3: + kvm_patch_ins_std(inst, magic_var(sprg3), inst_rt); + break; + case KVM_INST_MTSPR_SRR0: + kvm_patch_ins_std(inst, magic_var(srr0), inst_rt); + break; + case KVM_INST_MTSPR_SRR1: + kvm_patch_ins_std(inst, magic_var(srr1), inst_rt); + break; + case KVM_INST_MTSPR_DAR: + kvm_patch_ins_std(inst, magic_var(dar), inst_rt); + break; + case KVM_INST_MTSPR_DSISR: + kvm_patch_ins_stw(inst, magic_var(dsisr), inst_rt); + break; } switch (_inst) { |