From 07c94a38125376d70d156bd8bff98ddfe4c8ea95 Mon Sep 17 00:00:00 2001 From: Borislav Petkov Date: Fri, 9 Dec 2016 19:29:11 +0100 Subject: x86/amd: Simplify AMD E400 aware idle routine Reorganize the E400 detection now that we have everything in place: switch the CPUs to broadcast mode after the LAPIC has been initialized and remove the facilities that were used previously on the idle path. Unfortunately static_cpu_has_bug() cannpt be used in the E400 idle routine because alternatives have been applied when the actual detection happens, so the static switching does not take effect and the test will stay false. Use boot_cpu_has_bug() instead which is definitely an improvement over the RDMSR and the cpumask handling. Suggested-by: Thomas Gleixner Signed-off-by: Borislav Petkov Cc: Jiri Olsa Link: http://lkml.kernel.org/r/20161209182912.2726-5-bp@alien8.de Signed-off-by: Thomas Gleixner --- arch/x86/kernel/cpu/common.c | 1 - 1 file changed, 1 deletion(-) (limited to 'arch/x86/kernel/cpu/common.c') diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c index 9bd910a7dd0a..e1f98ff9a3f0 100644 --- a/arch/x86/kernel/cpu/common.c +++ b/arch/x86/kernel/cpu/common.c @@ -1144,7 +1144,6 @@ void enable_sep_cpu(void) void __init identify_boot_cpu(void) { identify_cpu(&boot_cpu_data); - init_amd_e400_c1e_mask(); #ifdef CONFIG_X86_32 sysenter_setup(); enable_sep_cpu(); -- cgit