diff mbox series

[PULL,07/79] cacheinfo: add i/d cache_linesize_log

Message ID 1538295197-23704-8-git-send-email-pbonzini@redhat.com
State New
Headers show
Series [PULL,01/79] virtio: Return true from virtio_queue_empty if broken | expand

Commit Message

Paolo Bonzini Sept. 30, 2018, 8:12 a.m. UTC 
From: "Emilio G. Cota" <cota@braap.org>

Signed-off-by: Emilio G. Cota <cota@braap.org>
Message-Id: <20180910232752.31565-2-cota@braap.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 include/qemu/osdep.h | 2 ++
 util/cacheinfo.c     | 8 ++++++++
 2 files changed, 10 insertions(+)
diff mbox series

Patch

diff --git a/include/qemu/osdep.h b/include/qemu/osdep.h
index a91068d..a746a5e 100644
--- a/include/qemu/osdep.h
+++ b/include/qemu/osdep.h
@@ -570,6 +570,8 @@  extern uintptr_t qemu_real_host_page_size;
 extern intptr_t qemu_real_host_page_mask;
 
 extern int qemu_icache_linesize;
+extern int qemu_icache_linesize_log;
 extern int qemu_dcache_linesize;
+extern int qemu_dcache_linesize_log;
 
 #endif
diff --git a/util/cacheinfo.c b/util/cacheinfo.c
index db5172d..6c8fe79 100644
--- a/util/cacheinfo.c
+++ b/util/cacheinfo.c
@@ -7,9 +7,12 @@ 
  */
 
 #include "qemu/osdep.h"
+#include "qemu/host-utils.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.
@@ -172,6 +175,11 @@  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);
 }