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authorHelge Deller <deller@gmx.de>2023-08-03 23:44:49 +0200
committerRichard Henderson <richard.henderson@linaro.org>2023-09-01 13:33:47 -0700
commit4757e2c771087520578d2a0fb2da5ec196899af7 (patch)
treebfdf8e80142c69a9745632aac01454d0460c672f
parenta55b9e72267085957cadb0af0a8811cfbd7c61a9 (diff)
linux-user: Emulate /proc/cpuinfo for Alpha
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>
-rw-r--r--linux-user/alpha/target_proc.h68
1 files changed, 67 insertions, 1 deletions
diff --git a/linux-user/alpha/target_proc.h b/linux-user/alpha/target_proc.h
index 43fe29ca72..dac37dffc9 100644
--- a/linux-user/alpha/target_proc.h
+++ b/linux-user/alpha/target_proc.h
@@ -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 */