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linux-user: Emulate /proc/cpuinfo for Alpha

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Add emulation for /proc/cpuinfo for the alpha architecture.

alpha output example:

(alpha-chroot)root@p100:/# cat /proc/cpuinfo
cpu                     : Alpha
cpu model               : ev67
cpu variation           : 0
cpu revision            : 0
cpu serial number       : JA00000000
system type             : QEMU
system variation        : QEMU_v8.0.92
system revision         : 0
system serial number    : AY00000000
cycle frequency [Hz]    : 250000000
timer frequency [Hz]    : 250.00
page size [bytes]       : 8192
phys. address bits      : 44
max. addr. space #      : 255
BogoMIPS                : 2500.00
platform string         : AlphaServer QEMU user-mode VM
cpus detected           : 8
cpus active             : 4
cpu active mask         : 0000000000000095
L1 Icache               : n/a
L1 Dcache               : n/a
L2 cache                : n/a
L3 cache                : n/a

Signed-off-by: Helge Deller <deller@gmx.de>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230803214450.647040-4-deller@gmx.de>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Helge Deller 2023-08-03 23:44:49 +02:00 committed by Richard Henderson
parent a55b9e7226
commit 4757e2c771
1 changed files with 67 additions and 1 deletions
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68
linux-user/alpha/target_proc.h
View File

@ -1 +1,67 @@
/* No target-specific /proc support */
/*
* Alpha specific proc functions for linux-user
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#ifndef ALPHA_TARGET_PROC_H
#define ALPHA_TARGET_PROC_H
static int open_cpuinfo(CPUArchState *cpu_env, int fd)
{
int max_cpus = sysconf(_SC_NPROCESSORS_CONF);
int num_cpus = sysconf(_SC_NPROCESSORS_ONLN);
unsigned long cpu_mask;
char model[32];
const char *p, *q;
int t;
p = object_class_get_name(OBJECT_CLASS(CPU_GET_CLASS(env_cpu(cpu_env))));
q = strchr(p, '-');
t = q - p;
assert(t < sizeof(model));
memcpy(model, p, t);
model[t] = 0;
t = sched_getaffinity(getpid(), sizeof(cpu_mask), (cpu_set_t *)&cpu_mask);
if (t < 0) {
if (num_cpus >= sizeof(cpu_mask) * 8) {
cpu_mask = -1;
} else {
cpu_mask = (1UL << num_cpus) - 1;
}
}
dprintf(fd,
"cpu\t\t\t: Alpha\n"
"cpu model\t\t: %s\n"
"cpu variation\t\t: 0\n"
"cpu revision\t\t: 0\n"
"cpu serial number\t: JA00000000\n"
"system type\t\t: QEMU\n"
"system variation\t: QEMU_v" QEMU_VERSION "\n"
"system revision\t\t: 0\n"
"system serial number\t: AY00000000\n"
"cycle frequency [Hz]\t: 250000000\n"
"timer frequency [Hz]\t: 250.00\n"
"page size [bytes]\t: %d\n"
"phys. address bits\t: %d\n"
"max. addr. space #\t: 255\n"
"BogoMIPS\t\t: 2500.00\n"
"kernel unaligned acc\t: 0 (pc=0,va=0)\n"
"user unaligned acc\t: 0 (pc=0,va=0)\n"
"platform string\t\t: AlphaServer QEMU user-mode VM\n"
"cpus detected\t\t: %d\n"
"cpus active\t\t: %d\n"
"cpu active mask\t\t: %016lx\n"
"L1 Icache\t\t: n/a\n"
"L1 Dcache\t\t: n/a\n"
"L2 cache\t\t: n/a\n"
"L3 cache\t\t: n/a\n",
model, TARGET_PAGE_SIZE, TARGET_PHYS_ADDR_SPACE_BITS,
max_cpus, num_cpus, cpu_mask);
return 0;
}
#define HAVE_ARCH_PROC_CPUINFO
#endif /* ALPHA_TARGET_PROC_H */