2 * PowerPC CPU initialization for qemu.
4 * Copyright 2016, David Gibson, Red Hat Inc. <dgibson@redhat.com>
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
20 #include "qemu/osdep.h"
21 #include "sysemu/hw_accel.h"
22 #include "sysemu/kvm.h"
24 #include "sysemu/cpus.h"
25 #include "qemu/error-report.h"
26 #include "qapi/error.h"
27 #include "cpu-models.h"
36 static const CompatInfo compat_table
[] = {
38 * Ordered from oldest to newest - the code relies on this
40 { /* POWER6, ISA2.05 */
41 .pvr
= CPU_POWERPC_LOGICAL_2_05
,
42 .pcr
= PCR_COMPAT_2_07
| PCR_COMPAT_2_06
| PCR_COMPAT_2_05
43 | PCR_TM_DIS
| PCR_VSX_DIS
,
44 .pcr_level
= PCR_COMPAT_2_05
,
47 { /* POWER7, ISA2.06 */
48 .pvr
= CPU_POWERPC_LOGICAL_2_06
,
49 .pcr
= PCR_COMPAT_2_07
| PCR_COMPAT_2_06
| PCR_TM_DIS
,
50 .pcr_level
= PCR_COMPAT_2_06
,
54 .pvr
= CPU_POWERPC_LOGICAL_2_06_PLUS
,
55 .pcr
= PCR_COMPAT_2_07
| PCR_COMPAT_2_06
| PCR_TM_DIS
,
56 .pcr_level
= PCR_COMPAT_2_06
,
59 { /* POWER8, ISA2.07 */
60 .pvr
= CPU_POWERPC_LOGICAL_2_07
,
61 .pcr
= PCR_COMPAT_2_07
,
62 .pcr_level
= PCR_COMPAT_2_07
,
67 static const CompatInfo
*compat_by_pvr(uint32_t pvr
)
71 for (i
= 0; i
< ARRAY_SIZE(compat_table
); i
++) {
72 if (compat_table
[i
].pvr
== pvr
) {
73 return &compat_table
[i
];
79 bool ppc_check_compat(PowerPCCPU
*cpu
, uint32_t compat_pvr
,
80 uint32_t min_compat_pvr
, uint32_t max_compat_pvr
)
82 PowerPCCPUClass
*pcc
= POWERPC_CPU_GET_CLASS(cpu
);
83 const CompatInfo
*compat
= compat_by_pvr(compat_pvr
);
84 const CompatInfo
*min
= compat_by_pvr(min_compat_pvr
);
85 const CompatInfo
*max
= compat_by_pvr(max_compat_pvr
);
87 #if !defined(CONFIG_USER_ONLY)
90 g_assert(!min_compat_pvr
|| min
);
91 g_assert(!max_compat_pvr
|| max
);
94 /* Not a recognized logical PVR */
97 if ((min
&& (compat
< min
)) || (max
&& (compat
> max
))) {
98 /* Outside specified range */
101 if (!(pcc
->pcr_supported
& compat
->pcr_level
)) {
102 /* Not supported by this CPU */
108 void ppc_set_compat(PowerPCCPU
*cpu
, uint32_t compat_pvr
, Error
**errp
)
110 const CompatInfo
*compat
= compat_by_pvr(compat_pvr
);
111 CPUPPCState
*env
= &cpu
->env
;
112 PowerPCCPUClass
*pcc
= POWERPC_CPU_GET_CLASS(cpu
);
117 } else if (!compat
) {
118 error_setg(errp
, "Unknown compatibility PVR 0x%08"PRIx32
, compat_pvr
);
120 } else if (!ppc_check_compat(cpu
, compat_pvr
, 0, 0)) {
121 error_setg(errp
, "Compatibility PVR 0x%08"PRIx32
" not valid for CPU",
128 cpu_synchronize_state(CPU(cpu
));
130 cpu
->compat_pvr
= compat_pvr
;
131 env
->spr
[SPR_PCR
] = pcr
& pcc
->pcr_mask
;
134 int ret
= kvmppc_set_compat(cpu
, cpu
->compat_pvr
);
136 error_setg_errno(errp
, -ret
,
137 "Unable to set CPU compatibility mode in KVM");
147 static void do_set_compat(CPUState
*cs
, run_on_cpu_data arg
)
149 PowerPCCPU
*cpu
= POWERPC_CPU(cs
);
150 SetCompatState
*s
= arg
.host_ptr
;
152 ppc_set_compat(cpu
, s
->compat_pvr
, &s
->err
);
155 void ppc_set_compat_all(uint32_t compat_pvr
, Error
**errp
)
161 .compat_pvr
= compat_pvr
,
165 run_on_cpu(cs
, do_set_compat
, RUN_ON_CPU_HOST_PTR(&s
));
168 error_propagate(errp
, s
.err
);
174 int ppc_compat_max_threads(PowerPCCPU
*cpu
)
176 const CompatInfo
*compat
= compat_by_pvr(cpu
->compat_pvr
);
177 int n_threads
= CPU(cpu
)->nr_threads
;
179 if (cpu
->compat_pvr
) {
181 n_threads
= MIN(n_threads
, compat
->max_threads
);