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-rw-r--r--hw/ppc/spapr_hcall.c164
1 files changed, 85 insertions, 79 deletions
diff --git a/hw/ppc/spapr_hcall.c b/hw/ppc/spapr_hcall.c
index d5b8d54..54ad83a 100644
--- a/hw/ppc/spapr_hcall.c
+++ b/hw/ppc/spapr_hcall.c
@@ -1663,9 +1663,9 @@ static target_ulong h_enter_nested(PowerPCCPU *cpu,
target_ulong *args)
{
PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu);
- CPUState *cs = CPU(cpu);
CPUPPCState *env = &cpu->env;
SpaprCpuState *spapr_cpu = spapr_cpu_state(cpu);
+ struct nested_ppc_state l2_state;
target_ulong hv_ptr = args[0];
target_ulong regs_ptr = args[1];
target_ulong hdec, now = cpu_ppc_load_tbl(env);
@@ -1699,6 +1699,10 @@ static target_ulong h_enter_nested(PowerPCCPU *cpu,
return H_PARAMETER;
}
+ if (hv_state.lpid == 0) {
+ return H_PARAMETER;
+ }
+
spapr_cpu->nested_host_state = g_try_new(struct nested_ppc_state, 1);
if (!spapr_cpu->nested_host_state) {
return H_NO_MEM;
@@ -1717,46 +1721,49 @@ static target_ulong h_enter_nested(PowerPCCPU *cpu,
return H_P2;
}
- len = sizeof(env->gpr);
+ len = sizeof(l2_state.gpr);
assert(len == sizeof(regs->gpr));
- memcpy(env->gpr, regs->gpr, len);
-
- env->lr = regs->link;
- env->ctr = regs->ctr;
- cpu_write_xer(env, regs->xer);
- ppc_set_cr(env, regs->ccr);
+ memcpy(l2_state.gpr, regs->gpr, len);
- env->msr = regs->msr;
- env->nip = regs->nip;
+ l2_state.lr = regs->link;
+ l2_state.ctr = regs->ctr;
+ l2_state.xer = regs->xer;
+ l2_state.cr = regs->ccr;
+ l2_state.msr = regs->msr;
+ l2_state.nip = regs->nip;
address_space_unmap(CPU(cpu)->as, regs, len, len, false);
- env->cfar = hv_state.cfar;
-
- assert(env->spr[SPR_LPIDR] == 0);
- env->spr[SPR_LPIDR] = hv_state.lpid;
+ l2_state.cfar = hv_state.cfar;
+ l2_state.lpidr = hv_state.lpid;
lpcr_mask = LPCR_DPFD | LPCR_ILE | LPCR_AIL | LPCR_LD | LPCR_MER;
lpcr = (env->spr[SPR_LPCR] & ~lpcr_mask) | (hv_state.lpcr & lpcr_mask);
lpcr |= LPCR_HR | LPCR_UPRT | LPCR_GTSE | LPCR_HVICE | LPCR_HDICE;
lpcr &= ~LPCR_LPES0;
- env->spr[SPR_LPCR] = lpcr & pcc->lpcr_mask;
+ l2_state.lpcr = lpcr & pcc->lpcr_mask;
- env->spr[SPR_PCR] = hv_state.pcr;
+ l2_state.pcr = hv_state.pcr;
/* hv_state.amor is not used */
- env->spr[SPR_DPDES] = hv_state.dpdes;
- env->spr[SPR_HFSCR] = hv_state.hfscr;
- hdec = hv_state.hdec_expiry - now;
+ l2_state.dpdes = hv_state.dpdes;
+ l2_state.hfscr = hv_state.hfscr;
/* 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;
- env->spr[SPR_SPRG0] = hv_state.sprg[0];
- env->spr[SPR_SPRG1] = hv_state.sprg[1];
- env->spr[SPR_SPRG2] = hv_state.sprg[2];
- env->spr[SPR_SPRG3] = hv_state.sprg[3];
- env->spr[SPR_BOOKS_PID] = hv_state.pidr;
- env->spr[SPR_PPR] = hv_state.ppr;
+ l2_state.srr0 = hv_state.srr0;
+ l2_state.srr1 = hv_state.srr1;
+ l2_state.sprg0 = hv_state.sprg[0];
+ l2_state.sprg1 = hv_state.sprg[1];
+ l2_state.sprg2 = hv_state.sprg[2];
+ l2_state.sprg3 = hv_state.sprg[3];
+ l2_state.pidr = hv_state.pidr;
+ l2_state.ppr = hv_state.ppr;
+ l2_state.tb_offset = env->tb_env->tb_offset + hv_state.tb_offset;
+ /*
+ * Switch to the nested guest environment and start the "hdec" timer.
+ */
+ nested_load_state(cpu, &l2_state);
+
+ hdec = hv_state.hdec_expiry - now;
cpu_ppc_hdecr_init(env);
cpu_ppc_store_hdecr(env, hdec);
@@ -1772,14 +1779,8 @@ 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 += hv_state.tb_offset;
spapr_cpu->in_nested = true;
- hreg_compute_hflags(env);
- ppc_maybe_interrupt(env);
- tlb_flush(cs);
- env->reserve_addr = -1; /* Reset the reservation */
-
/*
* The spapr hcall helper sets env->gpr[3] to the return value, but at
* this point the L1 is not returning from the hcall but rather we
@@ -1793,49 +1794,69 @@ void spapr_exit_nested(PowerPCCPU *cpu, int excp)
{
CPUPPCState *env = &cpu->env;
SpaprCpuState *spapr_cpu = spapr_cpu_state(cpu);
- target_ulong r3_return = env->excp_vectors[excp]; /* hcall return value */
+ struct nested_ppc_state l2_state;
target_ulong hv_ptr = spapr_cpu->nested_host_state->gpr[4];
target_ulong regs_ptr = spapr_cpu->nested_host_state->gpr[5];
+ target_ulong hsrr0, hsrr1, hdar, asdr, hdsisr;
struct kvmppc_hv_guest_state *hvstate;
struct kvmppc_pt_regs *regs;
hwaddr len;
assert(spapr_cpu->in_nested);
+ nested_save_state(&l2_state, cpu);
+ hsrr0 = env->spr[SPR_HSRR0];
+ hsrr1 = env->spr[SPR_HSRR1];
+ hdar = env->spr[SPR_HDAR];
+ hdsisr = env->spr[SPR_HDSISR];
+ asdr = env->spr[SPR_ASDR];
+
+ /*
+ * Switch back to the host environment (including for any error).
+ */
+ assert(env->spr[SPR_LPIDR] != 0);
+ nested_load_state(cpu, spapr_cpu->nested_host_state);
+ env->gpr[3] = env->excp_vectors[excp]; /* hcall return value */
+
cpu_ppc_hdecr_exit(env);
+ spapr_cpu->in_nested = false;
+
+ g_free(spapr_cpu->nested_host_state);
+ spapr_cpu->nested_host_state = NULL;
+
len = sizeof(*hvstate);
hvstate = address_space_map(CPU(cpu)->as, hv_ptr, &len, true,
MEMTXATTRS_UNSPECIFIED);
if (len != sizeof(*hvstate)) {
address_space_unmap(CPU(cpu)->as, hvstate, len, 0, true);
- r3_return = H_PARAMETER;
- goto out_restore_l1;
+ env->gpr[3] = H_PARAMETER;
+ return;
}
- hvstate->cfar = env->cfar;
- hvstate->lpcr = env->spr[SPR_LPCR];
- hvstate->pcr = env->spr[SPR_PCR];
- hvstate->dpdes = env->spr[SPR_DPDES];
- hvstate->hfscr = env->spr[SPR_HFSCR];
+ hvstate->cfar = l2_state.cfar;
+ hvstate->lpcr = l2_state.lpcr;
+ hvstate->pcr = l2_state.pcr;
+ hvstate->dpdes = l2_state.dpdes;
+ hvstate->hfscr = l2_state.hfscr;
if (excp == POWERPC_EXCP_HDSI) {
- hvstate->hdar = env->spr[SPR_HDAR];
- hvstate->hdsisr = env->spr[SPR_HDSISR];
- hvstate->asdr = env->spr[SPR_ASDR];
+ hvstate->hdar = hdar;
+ hvstate->hdsisr = hdsisr;
+ hvstate->asdr = asdr;
} else if (excp == POWERPC_EXCP_HISI) {
- hvstate->asdr = env->spr[SPR_ASDR];
+ hvstate->asdr = asdr;
}
/* HEIR should be implemented for HV mode and saved here. */
- hvstate->srr0 = env->spr[SPR_SRR0];
- hvstate->srr1 = env->spr[SPR_SRR1];
- hvstate->sprg[0] = env->spr[SPR_SPRG0];
- hvstate->sprg[1] = env->spr[SPR_SPRG1];
- hvstate->sprg[2] = env->spr[SPR_SPRG2];
- hvstate->sprg[3] = env->spr[SPR_SPRG3];
- hvstate->pidr = env->spr[SPR_BOOKS_PID];
- hvstate->ppr = env->spr[SPR_PPR];
+ hvstate->srr0 = l2_state.srr0;
+ hvstate->srr1 = l2_state.srr1;
+ hvstate->sprg[0] = l2_state.sprg0;
+ hvstate->sprg[1] = l2_state.sprg1;
+ hvstate->sprg[2] = l2_state.sprg2;
+ hvstate->sprg[3] = l2_state.sprg3;
+ hvstate->pidr = l2_state.pidr;
+ hvstate->ppr = l2_state.ppr;
/* Is it okay to specify write length larger than actual data written? */
address_space_unmap(CPU(cpu)->as, hvstate, len, len, true);
@@ -1845,46 +1866,31 @@ void spapr_exit_nested(PowerPCCPU *cpu, int excp)
MEMTXATTRS_UNSPECIFIED);
if (!regs || len != sizeof(*regs)) {
address_space_unmap(CPU(cpu)->as, regs, len, 0, true);
- r3_return = H_P2;
- goto out_restore_l1;
+ env->gpr[3] = H_P2;
+ return;
}
len = sizeof(env->gpr);
assert(len == sizeof(regs->gpr));
- memcpy(regs->gpr, env->gpr, len);
+ memcpy(regs->gpr, l2_state.gpr, len);
- regs->link = env->lr;
- regs->ctr = env->ctr;
- regs->xer = cpu_read_xer(env);
- regs->ccr = ppc_get_cr(env);
+ regs->link = l2_state.lr;
+ regs->ctr = l2_state.ctr;
+ regs->xer = l2_state.xer;
+ regs->ccr = l2_state.cr;
if (excp == POWERPC_EXCP_MCHECK ||
excp == POWERPC_EXCP_RESET ||
excp == POWERPC_EXCP_SYSCALL) {
- regs->nip = env->spr[SPR_SRR0];
- regs->msr = env->spr[SPR_SRR1] & env->msr_mask;
+ regs->nip = l2_state.srr0;
+ regs->msr = l2_state.srr1 & env->msr_mask;
} else {
- regs->nip = env->spr[SPR_HSRR0];
- regs->msr = env->spr[SPR_HSRR1] & env->msr_mask;
+ regs->nip = hsrr0;
+ regs->msr = hsrr1 & env->msr_mask;
}
/* Is it okay to specify write length larger than actual data written? */
address_space_unmap(CPU(cpu)->as, regs, len, len, true);
-
-out_restore_l1:
- assert(env->spr[SPR_LPIDR] != 0);
- nested_load_state(cpu, spapr_cpu->nested_host_state);
-
- /*
- * Return the interrupt vector address from H_ENTER_NESTED to the L1
- * (or error code).
- */
- env->gpr[3] = r3_return;
-
- spapr_cpu->in_nested = false;
-
- g_free(spapr_cpu->nested_host_state);
- spapr_cpu->nested_host_state = NULL;
}
static void hypercall_register_nested(void)
generated by cgit v1.1 at 2025-03-18 02:16:18 +0000