aboutsummaryrefslogtreecommitdiff
path: root/target-ppc/kvm.c
diff options
context:
space:
mode:
Diffstat (limited to 'target-ppc/kvm.c')
-rw-r--r--target-ppc/kvm.c311
1 files changed, 264 insertions, 47 deletions
diff --git a/target-ppc/kvm.c b/target-ppc/kvm.c
index 8e6441614e..9dff7607f1 100644
--- a/target-ppc/kvm.c
+++ b/target-ppc/kvm.c
@@ -61,6 +61,7 @@ static int cap_ppc_smt;
static int cap_ppc_rma;
static int cap_spapr_tce;
static int cap_hior;
+static int cap_one_reg;
/* XXX We have a race condition where we actually have a level triggered
* interrupt, but the infrastructure can't expose that yet, so the guest
@@ -80,6 +81,8 @@ static void kvm_kick_cpu(void *opaque)
qemu_cpu_kick(CPU(cpu));
}
+static int kvm_ppc_register_host_cpu_type(void);
+
int kvm_arch_init(KVMState *s)
{
cap_interrupt_unset = kvm_check_extension(s, KVM_CAP_PPC_UNSET_IRQ);
@@ -89,6 +92,7 @@ int kvm_arch_init(KVMState *s)
cap_ppc_smt = kvm_check_extension(s, KVM_CAP_PPC_SMT);
cap_ppc_rma = kvm_check_extension(s, KVM_CAP_PPC_RMA);
cap_spapr_tce = kvm_check_extension(s, KVM_CAP_SPAPR_TCE);
+ cap_one_reg = kvm_check_extension(s, KVM_CAP_ONE_REG);
cap_hior = kvm_check_extension(s, KVM_CAP_PPC_HIOR);
if (!cap_interrupt_level) {
@@ -96,6 +100,8 @@ int kvm_arch_init(KVMState *s)
"VM to stall at times!\n");
}
+ kvm_ppc_register_host_cpu_type();
+
return 0;
}
@@ -449,6 +455,202 @@ static void kvm_sw_tlb_put(PowerPCCPU *cpu)
g_free(bitmap);
}
+static void kvm_get_one_spr(CPUState *cs, uint64_t id, int spr)
+{
+ PowerPCCPU *cpu = POWERPC_CPU(cs);
+ CPUPPCState *env = &cpu->env;
+ union {
+ uint32_t u32;
+ uint64_t u64;
+ } val;
+ struct kvm_one_reg reg = {
+ .id = id,
+ .addr = (uintptr_t) &val,
+ };
+ int ret;
+
+ ret = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, &reg);
+ if (ret != 0) {
+ fprintf(stderr, "Warning: Unable to retrieve SPR %d from KVM: %s\n",
+ spr, strerror(errno));
+ } else {
+ switch (id & KVM_REG_SIZE_MASK) {
+ case KVM_REG_SIZE_U32:
+ env->spr[spr] = val.u32;
+ break;
+
+ case KVM_REG_SIZE_U64:
+ env->spr[spr] = val.u64;
+ break;
+
+ default:
+ /* Don't handle this size yet */
+ abort();
+ }
+ }
+}
+
+static void kvm_put_one_spr(CPUState *cs, uint64_t id, int spr)
+{
+ PowerPCCPU *cpu = POWERPC_CPU(cs);
+ CPUPPCState *env = &cpu->env;
+ union {
+ uint32_t u32;
+ uint64_t u64;
+ } val;
+ struct kvm_one_reg reg = {
+ .id = id,
+ .addr = (uintptr_t) &val,
+ };
+ int ret;
+
+ switch (id & KVM_REG_SIZE_MASK) {
+ case KVM_REG_SIZE_U32:
+ val.u32 = env->spr[spr];
+ break;
+
+ case KVM_REG_SIZE_U64:
+ val.u64 = env->spr[spr];
+ break;
+
+ default:
+ /* Don't handle this size yet */
+ abort();
+ }
+
+ ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, &reg);
+ if (ret != 0) {
+ fprintf(stderr, "Warning: Unable to set SPR %d to KVM: %s\n",
+ spr, strerror(errno));
+ }
+}
+
+static int kvm_put_fp(CPUState *cs)
+{
+ PowerPCCPU *cpu = POWERPC_CPU(cs);
+ CPUPPCState *env = &cpu->env;
+ struct kvm_one_reg reg;
+ int i;
+ int ret;
+
+ if (env->insns_flags & PPC_FLOAT) {
+ uint64_t fpscr = env->fpscr;
+ bool vsx = !!(env->insns_flags2 & PPC2_VSX);
+
+ reg.id = KVM_REG_PPC_FPSCR;
+ reg.addr = (uintptr_t)&fpscr;
+ ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, &reg);
+ if (ret < 0) {
+ dprintf("Unable to set FPSCR to KVM: %s\n", strerror(errno));
+ return ret;
+ }
+
+ for (i = 0; i < 32; i++) {
+ uint64_t vsr[2];
+
+ vsr[0] = float64_val(env->fpr[i]);
+ vsr[1] = env->vsr[i];
+ reg.addr = (uintptr_t) &vsr;
+ reg.id = vsx ? KVM_REG_PPC_VSR(i) : KVM_REG_PPC_FPR(i);
+
+ ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, &reg);
+ if (ret < 0) {
+ dprintf("Unable to set %s%d to KVM: %s\n", vsx ? "VSR" : "FPR",
+ i, strerror(errno));
+ return ret;
+ }
+ }
+ }
+
+ if (env->insns_flags & PPC_ALTIVEC) {
+ reg.id = KVM_REG_PPC_VSCR;
+ reg.addr = (uintptr_t)&env->vscr;
+ ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, &reg);
+ if (ret < 0) {
+ dprintf("Unable to set VSCR to KVM: %s\n", strerror(errno));
+ return ret;
+ }
+
+ for (i = 0; i < 32; i++) {
+ reg.id = KVM_REG_PPC_VR(i);
+ reg.addr = (uintptr_t)&env->avr[i];
+ ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, &reg);
+ if (ret < 0) {
+ dprintf("Unable to set VR%d to KVM: %s\n", i, strerror(errno));
+ return ret;
+ }
+ }
+ }
+
+ return 0;
+}
+
+static int kvm_get_fp(CPUState *cs)
+{
+ PowerPCCPU *cpu = POWERPC_CPU(cs);
+ CPUPPCState *env = &cpu->env;
+ struct kvm_one_reg reg;
+ int i;
+ int ret;
+
+ if (env->insns_flags & PPC_FLOAT) {
+ uint64_t fpscr;
+ bool vsx = !!(env->insns_flags2 & PPC2_VSX);
+
+ reg.id = KVM_REG_PPC_FPSCR;
+ reg.addr = (uintptr_t)&fpscr;
+ ret = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, &reg);
+ if (ret < 0) {
+ dprintf("Unable to get FPSCR from KVM: %s\n", strerror(errno));
+ return ret;
+ } else {
+ env->fpscr = fpscr;
+ }
+
+ for (i = 0; i < 32; i++) {
+ uint64_t vsr[2];
+
+ reg.addr = (uintptr_t) &vsr;
+ reg.id = vsx ? KVM_REG_PPC_VSR(i) : KVM_REG_PPC_FPR(i);
+
+ ret = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, &reg);
+ if (ret < 0) {
+ dprintf("Unable to get %s%d from KVM: %s\n",
+ vsx ? "VSR" : "FPR", i, strerror(errno));
+ return ret;
+ } else {
+ env->fpr[i] = vsr[0];
+ if (vsx) {
+ env->vsr[i] = vsr[1];
+ }
+ }
+ }
+ }
+
+ if (env->insns_flags & PPC_ALTIVEC) {
+ reg.id = KVM_REG_PPC_VSCR;
+ reg.addr = (uintptr_t)&env->vscr;
+ ret = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, &reg);
+ if (ret < 0) {
+ dprintf("Unable to get VSCR from KVM: %s\n", strerror(errno));
+ return ret;
+ }
+
+ for (i = 0; i < 32; i++) {
+ reg.id = KVM_REG_PPC_VR(i);
+ reg.addr = (uintptr_t)&env->avr[i];
+ ret = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, &reg);
+ if (ret < 0) {
+ dprintf("Unable to get VR%d from KVM: %s\n",
+ i, strerror(errno));
+ return ret;
+ }
+ }
+ }
+
+ return 0;
+}
+
int kvm_arch_put_registers(CPUState *cs, int level)
{
PowerPCCPU *cpu = POWERPC_CPU(cs);
@@ -489,6 +691,8 @@ int kvm_arch_put_registers(CPUState *cs, int level)
if (ret < 0)
return ret;
+ kvm_put_fp(cs);
+
if (env->tlb_dirty) {
kvm_sw_tlb_put(cpu);
env->tlb_dirty = false;
@@ -530,15 +734,22 @@ int kvm_arch_put_registers(CPUState *cs, int level)
}
if (cap_hior && (level >= KVM_PUT_RESET_STATE)) {
- uint64_t hior = env->spr[SPR_HIOR];
- struct kvm_one_reg reg = {
- .id = KVM_REG_PPC_HIOR,
- .addr = (uintptr_t) &hior,
- };
+ kvm_put_one_spr(cs, KVM_REG_PPC_HIOR, SPR_HIOR);
+ }
- ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, &reg);
- if (ret) {
- return ret;
+ if (cap_one_reg) {
+ int i;
+
+ /* We deliberately ignore errors here, for kernels which have
+ * the ONE_REG calls, but don't support the specific
+ * registers, there's a reasonable chance things will still
+ * work, at least until we try to migrate. */
+ for (i = 0; i < 1024; i++) {
+ uint64_t id = env->spr_cb[i].one_reg_id;
+
+ if (id != 0) {
+ kvm_put_one_spr(cs, id, i);
+ }
}
}
@@ -587,6 +798,8 @@ int kvm_arch_get_registers(CPUState *cs)
for (i = 0;i < 32; i++)
env->gpr[i] = regs.gpr[i];
+ kvm_get_fp(cs);
+
if (cap_booke_sregs) {
ret = kvm_vcpu_ioctl(cs, KVM_GET_SREGS, &sregs);
if (ret < 0) {
@@ -721,6 +934,26 @@ int kvm_arch_get_registers(CPUState *cs)
}
}
+ if (cap_hior) {
+ kvm_get_one_spr(cs, KVM_REG_PPC_HIOR, SPR_HIOR);
+ }
+
+ if (cap_one_reg) {
+ int i;
+
+ /* We deliberately ignore errors here, for kernels which have
+ * the ONE_REG calls, but don't support the specific
+ * registers, there's a reasonable chance things will still
+ * work, at least until we try to migrate. */
+ for (i = 0; i < 1024; i++) {
+ uint64_t id = env->spr_cb[i].one_reg_id;
+
+ if (id != 0) {
+ kvm_get_one_spr(cs, id, i);
+ }
+ }
+ }
+
return 0;
}
@@ -1259,46 +1492,25 @@ static void alter_insns(uint64_t *word, uint64_t flags, bool on)
static void kvmppc_host_cpu_initfn(Object *obj)
{
- PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(obj);
-
assert(kvm_enabled());
-
- if (pcc->info->pvr != mfpvr()) {
- fprintf(stderr, "Your host CPU is unsupported.\n"
- "Please choose a supported model instead, see -cpu ?.\n");
- exit(1);
- }
}
static void kvmppc_host_cpu_class_init(ObjectClass *oc, void *data)
{
PowerPCCPUClass *pcc = POWERPC_CPU_CLASS(oc);
- uint32_t host_pvr = mfpvr();
- PowerPCCPUClass *pvr_pcc;
- ppc_def_t *spec;
uint32_t vmx = kvmppc_get_vmx();
uint32_t dfp = kvmppc_get_dfp();
- spec = g_malloc0(sizeof(*spec));
-
- pvr_pcc = ppc_cpu_class_by_pvr(host_pvr);
- if (pvr_pcc != NULL) {
- memcpy(spec, pvr_pcc->info, sizeof(*spec));
- }
- pcc->info = spec;
- /* Override the display name for -cpu ? and QMP */
- pcc->info->name = "host";
-
- /* Now fix up the spec with information we can query from the host */
+ /* Now fix up the class with information we can query from the host */
if (vmx != -1) {
/* Only override when we know what the host supports */
- alter_insns(&spec->insns_flags, PPC_ALTIVEC, vmx > 0);
- alter_insns(&spec->insns_flags2, PPC2_VSX, vmx > 1);
+ alter_insns(&pcc->insns_flags, PPC_ALTIVEC, vmx > 0);
+ alter_insns(&pcc->insns_flags2, PPC2_VSX, vmx > 1);
}
if (dfp != -1) {
/* Only override when we know what the host supports */
- alter_insns(&spec->insns_flags2, PPC2_DFP, dfp);
+ alter_insns(&pcc->insns_flags2, PPC2_DFP, dfp);
}
}
@@ -1315,6 +1527,25 @@ int kvmppc_fixup_cpu(PowerPCCPU *cpu)
return 0;
}
+static int kvm_ppc_register_host_cpu_type(void)
+{
+ TypeInfo type_info = {
+ .name = TYPE_HOST_POWERPC_CPU,
+ .instance_init = kvmppc_host_cpu_initfn,
+ .class_init = kvmppc_host_cpu_class_init,
+ };
+ uint32_t host_pvr = mfpvr();
+ PowerPCCPUClass *pvr_pcc;
+
+ pvr_pcc = ppc_cpu_class_by_pvr(host_pvr);
+ if (pvr_pcc == NULL) {
+ return -1;
+ }
+ type_info.parent = object_class_get_name(OBJECT_CLASS(pvr_pcc));
+ type_register(&type_info);
+ return 0;
+}
+
bool kvm_arch_stop_on_emulation_error(CPUState *cpu)
{
@@ -1330,17 +1561,3 @@ int kvm_arch_on_sigbus(int code, void *addr)
{
return 1;
}
-
-static const TypeInfo kvm_host_cpu_type_info = {
- .name = TYPE_HOST_POWERPC_CPU,
- .parent = TYPE_POWERPC_CPU,
- .instance_init = kvmppc_host_cpu_initfn,
- .class_init = kvmppc_host_cpu_class_init,
-};
-
-static void kvm_ppc_register_types(void)
-{
- type_register_static(&kvm_host_cpu_type_info);
-}
-
-type_init(kvm_ppc_register_types)
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-04 10:45:31 +0000