[PATCH] linux-user: Implement /proc/cpuinfo for m68k CPU

[Helge Deller <deller@kernel.org>]

From: Helge Deller <deller@gmx.de>

Mimic the entries for /proc/cpuinfo to what can be seen on the debian
porterbox mitchy.debian.org.

Cc: Thomas Huth <th.huth+qemu@posteo.eu>
Cc: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Helge Deller <deller@gmx.de>
---
 linux-user/m68k/target_proc.h | 45 +++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)

diff --git a/linux-user/m68k/target_proc.h b/linux-user/m68k/target_proc.h
index 3df8f28e22..5a6678d59e 100644
--- a/linux-user/m68k/target_proc.h
+++ b/linux-user/m68k/target_proc.h
@@ -1,6 +1,8 @@
 /*
  * M68K specific proc functions for linux-user
  *
+ * Copyright (c) 2026 Helge Deller
+ *
  * SPDX-License-Identifier: GPL-2.0-or-later
  */
 #ifndef M68K_TARGET_PROC_H
@@ -13,4 +15,47 @@ static int open_hardware(CPUArchState *cpu_env, int fd)
 }
 #define HAVE_ARCH_PROC_HARDWARE
 
+
+static int open_cpuinfo(CPUArchState *cpu_env, int fd)
+{
+    const char *cpu, *fpu;
+    struct timespec res;
+    double freq_mhz;
+
+    if (clock_getres(CLOCK_REALTIME, &res) == -1) {
+        res.tv_nsec = 1;
+    }
+    freq_mhz = 1000.0 / res.tv_nsec;
+
+    if (m68k_feature(cpu_env, M68K_FEATURE_M68010)) {
+        cpu = "68010";
+    } else if (m68k_feature(cpu_env, M68K_FEATURE_M68020)) {
+        cpu = "68020";
+    } else if (m68k_feature(cpu_env, M68K_FEATURE_M68030)) {
+        cpu = "68030";
+    } else if (m68k_feature(cpu_env, M68K_FEATURE_M68040)) {
+        cpu = "68040";
+    } else if (m68k_feature(cpu_env, M68K_FEATURE_M68060)) {
+        cpu = "68060";
+    } else {
+        cpu = "680x0";
+    }
+
+    if (m68k_feature(cpu_env, M68K_FEATURE_FPU)) {
+        fpu = cpu;
+    } else {
+	fpu = "none(soft float)";
+    }
+
+    dprintf(fd, "CPU:\t\t%s\n"
+                "MMU:\t\t%s\n"
+                "FPU:\t\t%s\n"
+                "Clocking:\t%.1fMHz\n",
+                cpu, cpu, fpu, freq_mhz);
+    /* dropped BogoMips and Calibration for now */
+
+    return 0;
+}
+#define HAVE_ARCH_PROC_CPUINFO
+
 #endif /* M68K_TARGET_PROC_H */
-- 
2.54.0