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authorBorislav Petkov <borislav.petkov@amd.com>2010-01-22 16:01:03 +0100
committerH. Peter Anvin <hpa@zytor.com>2010-01-22 16:05:42 -0800
commita7b480e7f30b3813353ec009f10f2ac7a6669f3b (patch)
tree90ddc7a1ee6f1686699f77df39a3ff8a9d45d7a1 /arch/x86/lib
parent92dcffb916d309aa01778bf8963a6932e4014d07 (diff)
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x86, lib: Add wbinvd smp helpers
Add wbinvd_on_cpu and wbinvd_on_all_cpus stubs for executing wbinvd on a particular CPU. [ hpa: renamed lib/smp.c to lib/cache-smp.c ] [ hpa: wbinvd_on_all_cpus() returns int, but wbinvd() returns void. Thus, the former cannot be a macro for the latter, replace with an inline function. ] Signed-off-by: Borislav Petkov <borislav.petkov@amd.com> LKML-Reference: <1264172467-25155-2-git-send-email-bp@amd64.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'arch/x86/lib')
-rw-r--r--arch/x86/lib/Makefile2
-rw-r--r--arch/x86/lib/cache-smp.c19
2 files changed, 20 insertions, 1 deletions
diff --git a/arch/x86/lib/Makefile b/arch/x86/lib/Makefile
index cffd754..d85e0e4 100644
--- a/arch/x86/lib/Makefile
+++ b/arch/x86/lib/Makefile
@@ -14,7 +14,7 @@ $(obj)/inat.o: $(obj)/inat-tables.c
clean-files := inat-tables.c
-obj-$(CONFIG_SMP) += msr-smp.o
+obj-$(CONFIG_SMP) += msr-smp.o cache-smp.o
lib-y := delay.o
lib-y += thunk_$(BITS).o
diff --git a/arch/x86/lib/cache-smp.c b/arch/x86/lib/cache-smp.c
new file mode 100644
index 0000000..a3c6688
--- /dev/null
+++ b/arch/x86/lib/cache-smp.c
@@ -0,0 +1,19 @@
+#include <linux/smp.h>
+#include <linux/module.h>
+
+static void __wbinvd(void *dummy)
+{
+ wbinvd();
+}
+
+void wbinvd_on_cpu(int cpu)
+{
+ smp_call_function_single(cpu, __wbinvd, NULL, 1);
+}
+EXPORT_SYMBOL(wbinvd_on_cpu);
+
+int wbinvd_on_all_cpus(void)
+{
+ return on_each_cpu(__wbinvd, NULL, 1);
+}
+EXPORT_SYMBOL(wbinvd_on_all_cpus);