From 5fe21034292a2758639d6e66822a53770c7bcc0d Mon Sep 17 00:00:00 2001
From: "Emilio G. Cota" <cota@braap.org>
Date: Mon, 10 Sep 2018 19:27:41 -0400
Subject: [PATCH] cacheinfo: add i/d cache_linesize_log
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 --git a/include/qemu/osdep.h b/include/qemu/osdep.h
index a91068df0e..a746a5e531 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 db5172d07c..6c8fe797bf 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);
}
--
2.30.2