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/*
* PowerPC CPU initialization for qemu.
*
* Copyright 2016, David Gibson, Red Hat Inc. <dgibson@redhat.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "sysemu/kvm.h"
#include "kvm_ppc.h"
#include "sysemu/cpus.h"
#include "qemu/error-report.h"
#include "qapi/error.h"
#include "cpu-models.h"
typedef struct {
uint32_t pvr;
uint64_t pcr;
} CompatInfo;
static const CompatInfo compat_table[] = {
{ /* POWER6, ISA2.05 */
.pvr = CPU_POWERPC_LOGICAL_2_05,
.pcr = PCR_COMPAT_2_07 | PCR_COMPAT_2_06 | PCR_COMPAT_2_05
| PCR_TM_DIS | PCR_VSX_DIS,
},
{ /* POWER7, ISA2.06 */
.pvr = CPU_POWERPC_LOGICAL_2_06,
.pcr = PCR_COMPAT_2_07 | PCR_COMPAT_2_06 | PCR_TM_DIS,
},
{
.pvr = CPU_POWERPC_LOGICAL_2_06_PLUS,
.pcr = PCR_COMPAT_2_07 | PCR_COMPAT_2_06 | PCR_TM_DIS,
},
{ /* POWER8, ISA2.07 */
.pvr = CPU_POWERPC_LOGICAL_2_07,
.pcr = PCR_COMPAT_2_07,
},
};
static const CompatInfo *compat_by_pvr(uint32_t pvr)
{
int i;
for (i = 0; i < ARRAY_SIZE(compat_table); i++) {
if (compat_table[i].pvr == pvr) {
return &compat_table[i];
}
}
return NULL;
}
void ppc_set_compat(PowerPCCPU *cpu, uint32_t compat_pvr, Error **errp)
{
const CompatInfo *compat = compat_by_pvr(compat_pvr);
CPUPPCState *env = &cpu->env;
PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu);
uint64_t pcr;
if (!compat_pvr) {
pcr = 0;
} else if (!compat) {
error_setg(errp, "Unknown compatibility PVR 0x%08"PRIx32, compat_pvr);
return;
} else {
pcr = compat->pcr;
}
cpu->compat_pvr = compat_pvr;
env->spr[SPR_PCR] = pcr & pcc->pcr_mask;
if (kvm_enabled()) {
int ret = kvmppc_set_compat(cpu, cpu->compat_pvr);
if (ret < 0) {
error_setg_errno(errp, -ret,
"Unable to set CPU compatibility mode in KVM");
}
}
}
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