aboutsummaryrefslogtreecommitdiff
path: root/arch/powerpc/kvm/book3s_emulate.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/powerpc/kvm/book3s_emulate.c')
-rw-r--r--arch/powerpc/kvm/book3s_emulate.c174
1 files changed, 111 insertions, 63 deletions
diff --git a/arch/powerpc/kvm/book3s_emulate.c b/arch/powerpc/kvm/book3s_emulate.c
index 360ce68c980..3f295269af3 100644
--- a/arch/powerpc/kvm/book3s_emulate.c
+++ b/arch/powerpc/kvm/book3s_emulate.c
@@ -80,28 +80,45 @@ static bool spr_allowed(struct kvm_vcpu *vcpu, enum priv_level level)
return false;
/* Limit user space to its own small SPR set */
- if ((vcpu->arch.shared->msr & MSR_PR) && level > PRIV_PROBLEM)
+ if ((kvmppc_get_msr(vcpu) & MSR_PR) && level > PRIV_PROBLEM)
return false;
return true;
}
-int kvmppc_core_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu,
- unsigned int inst, int *advance)
+int kvmppc_core_emulate_op_pr(struct kvm_run *run, struct kvm_vcpu *vcpu,
+ unsigned int inst, int *advance)
{
int emulated = EMULATE_DONE;
int rt = get_rt(inst);
int rs = get_rs(inst);
int ra = get_ra(inst);
int rb = get_rb(inst);
+ u32 inst_sc = 0x44000002;
switch (get_op(inst)) {
+ case 0:
+ emulated = EMULATE_FAIL;
+ if ((kvmppc_get_msr(vcpu) & MSR_LE) &&
+ (inst == swab32(inst_sc))) {
+ /*
+ * This is the byte reversed syscall instruction of our
+ * hypercall handler. Early versions of LE Linux didn't
+ * swap the instructions correctly and ended up in
+ * illegal instructions.
+ * Just always fail hypercalls on these broken systems.
+ */
+ kvmppc_set_gpr(vcpu, 3, EV_UNIMPLEMENTED);
+ kvmppc_set_pc(vcpu, kvmppc_get_pc(vcpu) + 4);
+ emulated = EMULATE_DONE;
+ }
+ break;
case 19:
switch (get_xop(inst)) {
case OP_19_XOP_RFID:
case OP_19_XOP_RFI:
- kvmppc_set_pc(vcpu, vcpu->arch.shared->srr0);
- kvmppc_set_msr(vcpu, vcpu->arch.shared->srr1);
+ kvmppc_set_pc(vcpu, kvmppc_get_srr0(vcpu));
+ kvmppc_set_msr(vcpu, kvmppc_get_srr1(vcpu));
*advance = 0;
break;
@@ -113,16 +130,16 @@ int kvmppc_core_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu,
case 31:
switch (get_xop(inst)) {
case OP_31_XOP_MFMSR:
- kvmppc_set_gpr(vcpu, rt, vcpu->arch.shared->msr);
+ kvmppc_set_gpr(vcpu, rt, kvmppc_get_msr(vcpu));
break;
case OP_31_XOP_MTMSRD:
{
ulong rs_val = kvmppc_get_gpr(vcpu, rs);
if (inst & 0x10000) {
- ulong new_msr = vcpu->arch.shared->msr;
+ ulong new_msr = kvmppc_get_msr(vcpu);
new_msr &= ~(MSR_RI | MSR_EE);
new_msr |= rs_val & (MSR_RI | MSR_EE);
- vcpu->arch.shared->msr = new_msr;
+ kvmppc_set_msr_fast(vcpu, new_msr);
} else
kvmppc_set_msr(vcpu, rs_val);
break;
@@ -172,14 +189,14 @@ int kvmppc_core_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu,
vcpu->arch.mmu.tlbie(vcpu, addr, large);
break;
}
-#ifdef CONFIG_KVM_BOOK3S_64_PR
+#ifdef CONFIG_PPC_BOOK3S_64
case OP_31_XOP_FAKE_SC1:
{
/* SC 1 papr hypercalls */
ulong cmd = kvmppc_get_gpr(vcpu, 3);
int i;
- if ((vcpu->arch.shared->msr & MSR_PR) ||
+ if ((kvmppc_get_msr(vcpu) & MSR_PR) ||
!vcpu->arch.papr_enabled) {
emulated = EMULATE_FAIL;
break;
@@ -261,18 +278,15 @@ int kvmppc_core_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu,
ra_val = kvmppc_get_gpr(vcpu, ra);
addr = (ra_val + rb_val) & ~31ULL;
- if (!(vcpu->arch.shared->msr & MSR_SF))
+ if (!(kvmppc_get_msr(vcpu) & MSR_SF))
addr &= 0xffffffff;
vaddr = addr;
r = kvmppc_st(vcpu, &addr, 32, zeros, true);
if ((r == -ENOENT) || (r == -EPERM)) {
- struct kvmppc_book3s_shadow_vcpu *svcpu;
-
- svcpu = svcpu_get(vcpu);
*advance = 0;
- vcpu->arch.shared->dar = vaddr;
- svcpu->fault_dar = vaddr;
+ kvmppc_set_dar(vcpu, vaddr);
+ vcpu->arch.fault_dar = vaddr;
dsisr = DSISR_ISSTORE;
if (r == -ENOENT)
@@ -280,9 +294,8 @@ int kvmppc_core_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu,
else if (r == -EPERM)
dsisr |= DSISR_PROTFAULT;
- vcpu->arch.shared->dsisr = dsisr;
- svcpu->fault_dsisr = dsisr;
- svcpu_put(svcpu);
+ kvmppc_set_dsisr(vcpu, dsisr);
+ vcpu->arch.fault_dsisr = dsisr;
kvmppc_book3s_queue_irqprio(vcpu,
BOOK3S_INTERRUPT_DATA_STORAGE);
@@ -349,7 +362,7 @@ static struct kvmppc_bat *kvmppc_find_bat(struct kvm_vcpu *vcpu, int sprn)
return bat;
}
-int kvmppc_core_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, ulong spr_val)
+int kvmppc_core_emulate_mtspr_pr(struct kvm_vcpu *vcpu, int sprn, ulong spr_val)
{
int emulated = EMULATE_DONE;
@@ -360,10 +373,10 @@ int kvmppc_core_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, ulong spr_val)
to_book3s(vcpu)->sdr1 = spr_val;
break;
case SPRN_DSISR:
- vcpu->arch.shared->dsisr = spr_val;
+ kvmppc_set_dsisr(vcpu, spr_val);
break;
case SPRN_DAR:
- vcpu->arch.shared->dar = spr_val;
+ kvmppc_set_dar(vcpu, spr_val);
break;
case SPRN_HIOR:
to_book3s(vcpu)->hior = spr_val;
@@ -442,6 +455,31 @@ int kvmppc_core_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, ulong spr_val)
case SPRN_GQR7:
to_book3s(vcpu)->gqr[sprn - SPRN_GQR0] = spr_val;
break;
+ case SPRN_FSCR:
+ vcpu->arch.fscr = spr_val;
+ break;
+#ifdef CONFIG_PPC_BOOK3S_64
+ case SPRN_BESCR:
+ vcpu->arch.bescr = spr_val;
+ break;
+ case SPRN_EBBHR:
+ vcpu->arch.ebbhr = spr_val;
+ break;
+ case SPRN_EBBRR:
+ vcpu->arch.ebbrr = spr_val;
+ break;
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ case SPRN_TFHAR:
+ vcpu->arch.tfhar = spr_val;
+ break;
+ case SPRN_TEXASR:
+ vcpu->arch.texasr = spr_val;
+ break;
+ case SPRN_TFIAR:
+ vcpu->arch.tfiar = spr_val;
+ break;
+#endif
+#endif
case SPRN_ICTC:
case SPRN_THRM1:
case SPRN_THRM2:
@@ -459,6 +497,13 @@ int kvmppc_core_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, ulong spr_val)
case SPRN_WPAR_GEKKO:
case SPRN_MSSSR0:
case SPRN_DABR:
+#ifdef CONFIG_PPC_BOOK3S_64
+ case SPRN_MMCRS:
+ case SPRN_MMCRA:
+ case SPRN_MMCR0:
+ case SPRN_MMCR1:
+ case SPRN_MMCR2:
+#endif
break;
unprivileged:
default:
@@ -472,7 +517,7 @@ unprivileged:
return emulated;
}
-int kvmppc_core_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val)
+int kvmppc_core_emulate_mfspr_pr(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val)
{
int emulated = EMULATE_DONE;
@@ -497,10 +542,10 @@ int kvmppc_core_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val)
*spr_val = to_book3s(vcpu)->sdr1;
break;
case SPRN_DSISR:
- *spr_val = vcpu->arch.shared->dsisr;
+ *spr_val = kvmppc_get_dsisr(vcpu);
break;
case SPRN_DAR:
- *spr_val = vcpu->arch.shared->dar;
+ *spr_val = kvmppc_get_dar(vcpu);
break;
case SPRN_HIOR:
*spr_val = to_book3s(vcpu)->hior;
@@ -542,6 +587,31 @@ int kvmppc_core_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val)
case SPRN_GQR7:
*spr_val = to_book3s(vcpu)->gqr[sprn - SPRN_GQR0];
break;
+ case SPRN_FSCR:
+ *spr_val = vcpu->arch.fscr;
+ break;
+#ifdef CONFIG_PPC_BOOK3S_64
+ case SPRN_BESCR:
+ *spr_val = vcpu->arch.bescr;
+ break;
+ case SPRN_EBBHR:
+ *spr_val = vcpu->arch.ebbhr;
+ break;
+ case SPRN_EBBRR:
+ *spr_val = vcpu->arch.ebbrr;
+ break;
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+ case SPRN_TFHAR:
+ *spr_val = vcpu->arch.tfhar;
+ break;
+ case SPRN_TEXASR:
+ *spr_val = vcpu->arch.texasr;
+ break;
+ case SPRN_TFIAR:
+ *spr_val = vcpu->arch.tfiar;
+ break;
+#endif
+#endif
case SPRN_THRM1:
case SPRN_THRM2:
case SPRN_THRM3:
@@ -557,6 +627,14 @@ int kvmppc_core_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val)
case SPRN_WPAR_GEKKO:
case SPRN_MSSSR0:
case SPRN_DABR:
+#ifdef CONFIG_PPC_BOOK3S_64
+ case SPRN_MMCRS:
+ case SPRN_MMCRA:
+ case SPRN_MMCR0:
+ case SPRN_MMCR1:
+ case SPRN_MMCR2:
+ case SPRN_TIR:
+#endif
*spr_val = 0;
break;
default:
@@ -573,48 +651,17 @@ unprivileged:
u32 kvmppc_alignment_dsisr(struct kvm_vcpu *vcpu, unsigned int inst)
{
- u32 dsisr = 0;
-
- /*
- * This is what the spec says about DSISR bits (not mentioned = 0):
- *
- * 12:13 [DS] Set to bits 30:31
- * 15:16 [X] Set to bits 29:30
- * 17 [X] Set to bit 25
- * [D/DS] Set to bit 5
- * 18:21 [X] Set to bits 21:24
- * [D/DS] Set to bits 1:4
- * 22:26 Set to bits 6:10 (RT/RS/FRT/FRS)
- * 27:31 Set to bits 11:15 (RA)
- */
-
- switch (get_op(inst)) {
- /* D-form */
- case OP_LFS:
- case OP_LFD:
- case OP_STFD:
- case OP_STFS:
- dsisr |= (inst >> 12) & 0x4000; /* bit 17 */
- dsisr |= (inst >> 17) & 0x3c00; /* bits 18:21 */
- break;
- /* X-form */
- case 31:
- dsisr |= (inst << 14) & 0x18000; /* bits 15:16 */
- dsisr |= (inst << 8) & 0x04000; /* bit 17 */
- dsisr |= (inst << 3) & 0x03c00; /* bits 18:21 */
- break;
- default:
- printk(KERN_INFO "KVM: Unaligned instruction 0x%x\n", inst);
- break;
- }
-
- dsisr |= (inst >> 16) & 0x03ff; /* bits 22:31 */
-
- return dsisr;
+ return make_dsisr(inst);
}
ulong kvmppc_alignment_dar(struct kvm_vcpu *vcpu, unsigned int inst)
{
+#ifdef CONFIG_PPC_BOOK3S_64
+ /*
+ * Linux's fix_alignment() assumes that DAR is valid, so can we
+ */
+ return vcpu->arch.fault_dar;
+#else
ulong dar = 0;
ulong ra = get_ra(inst);
ulong rb = get_rb(inst);
@@ -639,4 +686,5 @@ ulong kvmppc_alignment_dar(struct kvm_vcpu *vcpu, unsigned int inst)
}
return dar;
+#endif
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-04 06:00:01 +0000