[Qemu-devel] [PATCH 10/32] turn info kqemu into generic info accelerator

[Glauber Costa <glommer@redhat.com>]

From: Glauber Costa <gcosta@redhat.com>

Yet another accel field: info.
>From this point on, "info kqemu" is no more. "info accelerator" should
be used instead.

Signed-off-by: Glauber Costa <glommer@redhat.com>
---
 accel.c   |    6 ++++++
 accel.h   |    8 ++++++++
 kqemu.c   |   26 ++++++++++++++++++++++++++
 monitor.c |   35 ++++++++++++-----------------------
 4 files changed, 52 insertions(+), 23 deletions(-)

diff --git a/accel.c b/accel.c
index 6776244..cb615d7 100644
--- a/accel.c
+++ b/accel.c
@@ -8,6 +8,11 @@ int _accel_nop(void)
     return 0;
 }
 
+int noaccel_info(CPUState *env, char *buf)
+{
+    return snprintf(buf, MAX_INFO_BUF, "no accelerator present.\n");
+}
+
 #define accel_nop ((void *)_accel_nop)
 
 /* Accelerator wrapper for the no-accel (raw qemu) case */
@@ -16,5 +21,6 @@ QEMUAccel noaccel = {
     .init_env = accel_nop,
     .flush_cache = accel_nop,
     .flush_page = accel_nop,
+    .info = noaccel_info,
 };
 
diff --git a/accel.h b/accel.h
index 935cfef..549ce01 100644
--- a/accel.h
+++ b/accel.h
@@ -1,11 +1,14 @@
 #ifndef _ACCEL_H_
 #define _ACCEL_H_
 
+#define MAX_INFO_BUF 1024
+
 typedef struct QEMUAccel {
     void (*cpu_interrupt)(CPUState *env);
     void (*init_env)(CPUState *env);
     void (*flush_cache)(CPUState *env, int global);
     void (*flush_page)(CPUState *env, target_ulong addr);
+    int (*info)(CPUState *env, char *buf);
 } QEMUAccel;
 
 extern QEMUAccel *current_accel;
@@ -35,4 +38,9 @@ static inline void accel_flush_page(CPUState *env, target_ulong addr)
 {
     current_accel->flush_page(env, addr);
 }
+
+static inline int accel_info(CPUState *env, char *buf)
+{
+    return current_accel->info(env, buf);
+}
 #endif
diff --git a/kqemu.c b/kqemu.c
index 3f2433a..424d8f4 100644
--- a/kqemu.c
+++ b/kqemu.c
@@ -1047,11 +1047,37 @@ static void qpi_init(void)
                                  0x1000, qpi_io_memory);
 }
 
+static int kqemu_info(CPUState *env, char *buf)
+{
+    int val, len;
+    int bufsiz = MAX_INFO_BUF;
+    val = 0;
+    val = env->kqemu_enabled;
+    len = snprintf(buf, bufsiz, "kqemu support: ");
+    buf += len;
+    bufsiz -= len;
+
+    switch(val) {
+    default:
+        len += snprintf(buf, bufsiz, "present, but bogus value\n");
+        break;
+    case 1:
+        len += snprintf(buf, bufsiz, "enabled for user code\n");
+        break;
+    case 2:
+        len += snprintf(buf, bufsiz, "enabled for user and kernel code\n");
+        break;
+    }
+
+    return len;
+}
+
 QEMUAccel kqemu_accel = {
     .cpu_interrupt = kqemu_cpu_interrupt,
     .init_env = kqemu_init_env,
     .flush_cache = kqemu_flush,
     .flush_page = kqemu_flush_page,
+    .info = kqemu_info,
 };
 
 #endif
diff --git a/monitor.c b/monitor.c
index f0a0bc3..d3ab137 100644
--- a/monitor.c
+++ b/monitor.c
@@ -34,6 +34,7 @@
 #include "block.h"
 #include "audio/audio.h"
 #include "disas.h"
+#include "accel.h"
 #include <dirent.h>
 #include "qemu-timer.h"
 #include "migration.h"
@@ -1233,34 +1234,22 @@ static void mem_info(void)
 }
 #endif
 
-static void do_info_kqemu(void)
+static void do_info_accelerator(void)
 {
-#ifdef USE_KQEMU
+    char buf[MAX_INFO_BUF];
     CPUState *env;
-    int val;
-    val = 0;
+
     env = mon_get_cpu();
+
     if (!env) {
         term_printf("No cpu initialized yet");
         return;
     }
-    val = env->kqemu_enabled;
-    term_printf("kqemu support: ");
-    switch(val) {
-    default:
-    case 0:
-        term_printf("disabled\n");
-        break;
-    case 1:
-        term_printf("enabled for user code\n");
-        break;
-    case 2:
-        term_printf("enabled for user and kernel code\n");
-        break;
-    }
-#else
-    term_printf("kqemu support: not compiled\n");
-#endif
+
+    if (accel_info(env, buf))
+        term_printf(buf);
+    else
+        term_printf("No accelerator present\n");
 }
 
 #ifdef CONFIG_PROFILER
@@ -1493,8 +1482,8 @@ static const term_cmd_t info_cmds[] = {
 #endif
     { "jit", "", do_info_jit,
       "", "show dynamic compiler info", },
-    { "kqemu", "", do_info_kqemu,
-      "", "show kqemu information", },
+    { "accelerator", "", do_info_accelerator,
+      "", "show accelerator information", },
     { "usb", "", usb_info,
       "", "show guest USB devices", },
     { "usbhost", "", usb_host_info,
-- 
1.5.5.1