From a7b480e7f30b3813353ec009f10f2ac7a6669f3b Mon Sep 17 00:00:00 2001 From: Borislav Petkov Date: Fri, 22 Jan 2010 16:01:03 +0100 Subject: 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 LKML-Reference: <1264172467-25155-2-git-send-email-bp@amd64.org> Signed-off-by: H. Peter Anvin --- arch/x86/lib/Makefile | 2 +- arch/x86/lib/cache-smp.c | 19 +++++++++++++++++++ 2 files changed, 20 insertions(+), 1 deletion(-) create mode 100644 arch/x86/lib/cache-smp.c (limited to 'arch/x86/lib') diff --git a/arch/x86/lib/Makefile b/arch/x86/lib/Makefile index cffd754f3039..d85e0e438b58 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 000000000000..a3c668875038 --- /dev/null +++ b/arch/x86/lib/cache-smp.c @@ -0,0 +1,19 @@ +#include +#include + +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); -- cgit v1.2.3