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-rw-r--r--hw/ppc/spapr_hcall.c150
-rw-r--r--include/hw/ppc/spapr_cpu_core.h5
2 files changed, 115 insertions, 40 deletions
diff --git a/hw/ppc/spapr_hcall.c b/hw/ppc/spapr_hcall.c
index 0582b52..d5b8d54 100644
--- a/hw/ppc/spapr_hcall.c
+++ b/hw/ppc/spapr_hcall.c
@@ -1546,6 +1546,112 @@ static target_ulong h_copy_tofrom_guest(PowerPCCPU *cpu,
return H_FUNCTION;
}
+struct nested_ppc_state {
+ uint64_t gpr[32];
+ uint64_t lr;
+ uint64_t ctr;
+ uint64_t cfar;
+ uint64_t msr;
+ uint64_t nip;
+ uint32_t cr;
+
+ uint64_t xer;
+
+ uint64_t lpcr;
+ uint64_t lpidr;
+ uint64_t pidr;
+ uint64_t pcr;
+ uint64_t dpdes;
+ uint64_t hfscr;
+ uint64_t srr0;
+ uint64_t srr1;
+ uint64_t sprg0;
+ uint64_t sprg1;
+ uint64_t sprg2;
+ uint64_t sprg3;
+ uint64_t ppr;
+
+ int64_t tb_offset;
+};
+
+static void nested_save_state(struct nested_ppc_state *save, PowerPCCPU *cpu)
+{
+ CPUPPCState *env = &cpu->env;
+
+ memcpy(save->gpr, env->gpr, sizeof(save->gpr));
+
+ save->lr = env->lr;
+ save->ctr = env->ctr;
+ save->cfar = env->cfar;
+ save->msr = env->msr;
+ save->nip = env->nip;
+
+ save->cr = ppc_get_cr(env);
+ save->xer = cpu_read_xer(env);
+
+ save->lpcr = env->spr[SPR_LPCR];
+ save->lpidr = env->spr[SPR_LPIDR];
+ save->pcr = env->spr[SPR_PCR];
+ save->dpdes = env->spr[SPR_DPDES];
+ save->hfscr = env->spr[SPR_HFSCR];
+ save->srr0 = env->spr[SPR_SRR0];
+ save->srr1 = env->spr[SPR_SRR1];
+ save->sprg0 = env->spr[SPR_SPRG0];
+ save->sprg1 = env->spr[SPR_SPRG1];
+ save->sprg2 = env->spr[SPR_SPRG2];
+ save->sprg3 = env->spr[SPR_SPRG3];
+ save->pidr = env->spr[SPR_BOOKS_PID];
+ save->ppr = env->spr[SPR_PPR];
+
+ save->tb_offset = env->tb_env->tb_offset;
+}
+
+static void nested_load_state(PowerPCCPU *cpu, struct nested_ppc_state *load)
+{
+ CPUState *cs = CPU(cpu);
+ CPUPPCState *env = &cpu->env;
+
+ memcpy(env->gpr, load->gpr, sizeof(env->gpr));
+
+ env->lr = load->lr;
+ env->ctr = load->ctr;
+ env->cfar = load->cfar;
+ env->msr = load->msr;
+ env->nip = load->nip;
+
+ ppc_set_cr(env, load->cr);
+ cpu_write_xer(env, load->xer);
+
+ env->spr[SPR_LPCR] = load->lpcr;
+ env->spr[SPR_LPIDR] = load->lpidr;
+ env->spr[SPR_PCR] = load->pcr;
+ env->spr[SPR_DPDES] = load->dpdes;
+ env->spr[SPR_HFSCR] = load->hfscr;
+ env->spr[SPR_SRR0] = load->srr0;
+ env->spr[SPR_SRR1] = load->srr1;
+ env->spr[SPR_SPRG0] = load->sprg0;
+ env->spr[SPR_SPRG1] = load->sprg1;
+ env->spr[SPR_SPRG2] = load->sprg2;
+ env->spr[SPR_SPRG3] = load->sprg3;
+ env->spr[SPR_BOOKS_PID] = load->pidr;
+ env->spr[SPR_PPR] = load->ppr;
+
+ env->tb_env->tb_offset = load->tb_offset;
+
+ /*
+ * MSR updated, compute hflags and possible interrupts.
+ */
+ hreg_compute_hflags(env);
+ ppc_maybe_interrupt(env);
+
+ /*
+ * Nested HV does not tag TLB entries between L1 and L2, so must
+ * flush on transition.
+ */
+ tlb_flush(cs);
+ env->reserve_addr = -1; /* Reset the reservation */
+}
+
/*
* When this handler returns, the environment is switched to the L2 guest
* and TCG begins running that. spapr_exit_nested() performs the switch from
@@ -1593,12 +1699,14 @@ static target_ulong h_enter_nested(PowerPCCPU *cpu,
return H_PARAMETER;
}
- spapr_cpu->nested_host_state = g_try_new(CPUPPCState, 1);
+ spapr_cpu->nested_host_state = g_try_new(struct nested_ppc_state, 1);
if (!spapr_cpu->nested_host_state) {
return H_NO_MEM;
}
- memcpy(spapr_cpu->nested_host_state, env, sizeof(CPUPPCState));
+ assert(env->spr[SPR_LPIDR] == 0);
+ assert(env->spr[SPR_DPDES] == 0);
+ nested_save_state(spapr_cpu->nested_host_state, cpu);
len = sizeof(*regs);
regs = address_space_map(CPU(cpu)->as, regs_ptr, &len, false,
@@ -1639,7 +1747,6 @@ static target_ulong h_enter_nested(PowerPCCPU *cpu,
env->spr[SPR_DPDES] = hv_state.dpdes;
env->spr[SPR_HFSCR] = hv_state.hfscr;
hdec = hv_state.hdec_expiry - now;
- spapr_cpu->nested_tb_offset = hv_state.tb_offset;
/* TCG does not implement DAWR*, CIABR, PURR, SPURR, IC, VTB, HEIR SPRs*/
env->spr[SPR_SRR0] = hv_state.srr0;
env->spr[SPR_SRR1] = hv_state.srr1;
@@ -1665,7 +1772,7 @@ static target_ulong h_enter_nested(PowerPCCPU *cpu,
* and it's not obviously worth a new data structure to do it.
*/
- env->tb_env->tb_offset += spapr_cpu->nested_tb_offset;
+ env->tb_env->tb_offset += hv_state.tb_offset;
spapr_cpu->in_nested = true;
hreg_compute_hflags(env);
@@ -1684,7 +1791,6 @@ static target_ulong h_enter_nested(PowerPCCPU *cpu,
void spapr_exit_nested(PowerPCCPU *cpu, int excp)
{
- CPUState *cs = CPU(cpu);
CPUPPCState *env = &cpu->env;
SpaprCpuState *spapr_cpu = spapr_cpu_state(cpu);
target_ulong r3_return = env->excp_vectors[excp]; /* hcall return value */
@@ -1766,34 +1872,8 @@ void spapr_exit_nested(PowerPCCPU *cpu, int excp)
address_space_unmap(CPU(cpu)->as, regs, len, len, true);
out_restore_l1:
- memcpy(env->gpr, spapr_cpu->nested_host_state->gpr, sizeof(env->gpr));
- env->lr = spapr_cpu->nested_host_state->lr;
- env->ctr = spapr_cpu->nested_host_state->ctr;
- memcpy(env->crf, spapr_cpu->nested_host_state->crf, sizeof(env->crf));
- env->cfar = spapr_cpu->nested_host_state->cfar;
- env->xer = spapr_cpu->nested_host_state->xer;
- env->so = spapr_cpu->nested_host_state->so;
- env->ca = spapr_cpu->nested_host_state->ca;
- env->ov = spapr_cpu->nested_host_state->ov;
- env->ov32 = spapr_cpu->nested_host_state->ov32;
- env->ca32 = spapr_cpu->nested_host_state->ca32;
- env->msr = spapr_cpu->nested_host_state->msr;
- env->nip = spapr_cpu->nested_host_state->nip;
-
assert(env->spr[SPR_LPIDR] != 0);
- env->spr[SPR_LPCR] = spapr_cpu->nested_host_state->spr[SPR_LPCR];
- env->spr[SPR_LPIDR] = spapr_cpu->nested_host_state->spr[SPR_LPIDR];
- env->spr[SPR_PCR] = spapr_cpu->nested_host_state->spr[SPR_PCR];
- env->spr[SPR_DPDES] = 0;
- env->spr[SPR_HFSCR] = spapr_cpu->nested_host_state->spr[SPR_HFSCR];
- env->spr[SPR_SRR0] = spapr_cpu->nested_host_state->spr[SPR_SRR0];
- env->spr[SPR_SRR1] = spapr_cpu->nested_host_state->spr[SPR_SRR1];
- env->spr[SPR_SPRG0] = spapr_cpu->nested_host_state->spr[SPR_SPRG0];
- env->spr[SPR_SPRG1] = spapr_cpu->nested_host_state->spr[SPR_SPRG1];
- env->spr[SPR_SPRG2] = spapr_cpu->nested_host_state->spr[SPR_SPRG2];
- env->spr[SPR_SPRG3] = spapr_cpu->nested_host_state->spr[SPR_SPRG3];
- env->spr[SPR_BOOKS_PID] = spapr_cpu->nested_host_state->spr[SPR_BOOKS_PID];
- env->spr[SPR_PPR] = spapr_cpu->nested_host_state->spr[SPR_PPR];
+ nested_load_state(cpu, spapr_cpu->nested_host_state);
/*
* Return the interrupt vector address from H_ENTER_NESTED to the L1
@@ -1801,14 +1881,8 @@ out_restore_l1:
*/
env->gpr[3] = r3_return;
- env->tb_env->tb_offset -= spapr_cpu->nested_tb_offset;
spapr_cpu->in_nested = false;
- hreg_compute_hflags(env);
- ppc_maybe_interrupt(env);
- tlb_flush(cs);
- env->reserve_addr = -1; /* Reset the reservation */
-
g_free(spapr_cpu->nested_host_state);
spapr_cpu->nested_host_state = NULL;
}
diff --git a/include/hw/ppc/spapr_cpu_core.h b/include/hw/ppc/spapr_cpu_core.h
index b560514..69a52e3 100644
--- a/include/hw/ppc/spapr_cpu_core.h
+++ b/include/hw/ppc/spapr_cpu_core.h
@@ -41,6 +41,8 @@ void spapr_cpu_set_entry_state(PowerPCCPU *cpu, target_ulong nip,
target_ulong r1, target_ulong r3,
target_ulong r4);
+struct nested_ppc_state;
+
typedef struct SpaprCpuState {
uint64_t vpa_addr;
uint64_t slb_shadow_addr, slb_shadow_size;
@@ -51,8 +53,7 @@ typedef struct SpaprCpuState {
/* Fields for nested-HV support */
bool in_nested; /* true while the L2 is executing */
- CPUPPCState *nested_host_state; /* holds the L1 state while L2 executes */
- int64_t nested_tb_offset; /* L1->L2 TB offset */
+ struct nested_ppc_state *nested_host_state; /* holds the L1 state while L2 executes */
} SpaprCpuState;
static inline SpaprCpuState *spapr_cpu_state(PowerPCCPU *cpu)
generated by cgit v1.1 at 2024-12-25 17:37:33 +0000