migration/postcopy: mis->have_listen_thread check will never be touched

[mirror_qemu.git] / util / cacheinfo.c

diff --git a/util/cacheinfo.c b/util/cacheinfo.c
index db5172d07c7aa3536188ed4a4916931c86134aac..ea6f3e99bf4a267f87f62f49c13c702b39c48efa 100644 (file)
--- a/util/cacheinfo.c
+++ b/util/cacheinfo.c
@@ -7,9 +7,13 @@
  */
 
 #include "qemu/osdep.h"
+#include "qemu/host-utils.h"
+#include "qemu/atomic.h"
 
 int qemu_icache_linesize = 0;
+int qemu_icache_linesize_log;
 int qemu_dcache_linesize = 0;
+int qemu_dcache_linesize_log;
 
 /*
  * Operating system specific detection mechanisms.
@@ -61,25 +65,28 @@ static void sys_cache_info(int *isize, int *dsize)
     g_free(buf);
 }
 
-#elif defined(__APPLE__) \
-      || defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
+#elif defined(__APPLE__)
 # include <sys/sysctl.h>
-# if defined(__APPLE__)
-#  define SYSCTL_CACHELINE_NAME "hw.cachelinesize"
-# else
-#  define SYSCTL_CACHELINE_NAME "machdep.cacheline_size"
-# endif
-
 static void sys_cache_info(int *isize, int *dsize)
 {
     /* There's only a single sysctl for both I/D cache line sizes.  */
     long size;
     size_t len = sizeof(size);
-    if (!sysctlbyname(SYSCTL_CACHELINE_NAME, &size, &len, NULL, 0)) {
+    if (!sysctlbyname("hw.cachelinesize", &size, &len, NULL, 0)) {
+        *isize = *dsize = size;
+    }
+}
+#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
+# include <sys/sysctl.h>
+static void sys_cache_info(int *isize, int *dsize)
+{
+    /* There's only a single sysctl for both I/D cache line sizes.  */
+    int size;
+    size_t len = sizeof(size);
+    if (!sysctlbyname("machdep.cacheline_size", &size, &len, NULL, 0)) {
         *isize = *dsize = size;
     }
 }
-
 #else
 /* POSIX */
 
@@ -103,7 +110,7 @@ static void sys_cache_info(int *isize, int *dsize)
 static void arch_cache_info(int *isize, int *dsize)
 {
     if (*isize == 0 || *dsize == 0) {
-        unsigned long ctr;
+        uint64_t ctr;
 
         /* The real cache geometry is in CCSIDR_EL1/CLIDR_EL1/CSSELR_EL1,
            but (at least under Linux) these are marked protected by the
@@ -172,6 +179,13 @@ static void __attribute__((constructor)) init_cache_info(void)
     arch_cache_info(&isize, &dsize);
     fallback_cache_info(&isize, &dsize);
 
+    assert((isize & (isize - 1)) == 0);
+    assert((dsize & (dsize - 1)) == 0);
+
     qemu_icache_linesize = isize;
+    qemu_icache_linesize_log = ctz32(isize);
     qemu_dcache_linesize = dsize;
+    qemu_dcache_linesize_log = ctz32(dsize);
+
+    atomic64_init();
 }