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pseries: Add H_SET_MODE hcall to change guest exception endianness

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H_SET_MODE is used for controlling various partition settings. One
of these settings is the endianness a guest takes its exceptions in.

Signed-off-by: Anton Blanchard <anton@samba.org>
[agraf: fix whitespace]
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Anton Blanchard 2013-08-19 21:04:20 +10:00 • committed by Alexander Graf
parent 33a0e5d8c5
commit 42561bf2e4
3 changed files with 67 additions and 2 deletions
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50
hw/ppc/spapr_hcall.c
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@ -657,6 +657,54 @@ static target_ulong h_logical_dcbf(PowerPCCPU *cpu, sPAPREnvironment *spapr,
return H_SUCCESS;
}
static target_ulong h_set_mode(PowerPCCPU *cpu, sPAPREnvironment *spapr,
target_ulong opcode, target_ulong *args)
{
CPUState *cs;
target_ulong mflags = args[0];
target_ulong resource = args[1];
target_ulong value1 = args[2];
target_ulong value2 = args[3];
target_ulong ret = H_P2;
if (resource == H_SET_MODE_ENDIAN) {
if (value1) {
ret = H_P3;
goto out;
}
if (value2) {
ret = H_P4;
goto out;
}
switch (mflags) {
case H_SET_MODE_ENDIAN_BIG:
for (cs = first_cpu; cs != NULL; cs = cs->next_cpu) {
PowerPCCPU *cp = POWERPC_CPU(cs);
CPUPPCState *env = &cp->env;
env->spr[SPR_LPCR] &= ~LPCR_ILE;
}
ret = H_SUCCESS;
break;
case H_SET_MODE_ENDIAN_LITTLE:
for (cs = first_cpu; cs != NULL; cs = cs->next_cpu) {
PowerPCCPU *cp = POWERPC_CPU(cs);
CPUPPCState *env = &cp->env;
env->spr[SPR_LPCR] |= LPCR_ILE;
}
ret = H_SUCCESS;
break;
default:
ret = H_UNSUPPORTED_FLAG;
}
}
out:
return ret;
}
static spapr_hcall_fn papr_hypercall_table[(MAX_HCALL_OPCODE / 4) + 1];
static spapr_hcall_fn kvmppc_hypercall_table[KVMPPC_HCALL_MAX - KVMPPC_HCALL_BASE + 1];
@ -734,6 +782,8 @@ static void hypercall_register_types(void)
/* qemu/KVM-PPC specific hcalls */
spapr_register_hypercall(KVMPPC_H_RTAS, h_rtas);
spapr_register_hypercall(H_SET_MODE, h_set_mode);
}
type_init(hypercall_register_types)