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authorBorislav Petkov <bp@alien8.de>2016-12-09 19:29:11 +0100
committerThomas Gleixner <tglx@linutronix.de>2016-12-09 21:23:21 +0100
commit07c94a38125376d70d156bd8bff98ddfe4c8ea95 (patch)
treea4e22b8100ea51e42f9f3841d94e5b8fb6416e8f /drivers/acpi/processor_idle.c
parente7ff3a47630d9512d0bcbdfa73660021087ba445 (diff)
downloadlinux-07c94a38125376d70d156bd8bff98ddfe4c8ea95.tar.bz2
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 <tglx@linutronix.de> Signed-off-by: Borislav Petkov <bp@suse.de> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lkml.kernel.org/r/20161209182912.2726-5-bp@alien8.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'drivers/acpi/processor_idle.c')
-rw-r--r--drivers/acpi/processor_idle.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index 2237d3f24f0e..5c8aa9cf62d7 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -141,7 +141,7 @@ static void lapic_timer_check_state(int state, struct acpi_processor *pr,
if (cpu_has(&cpu_data(pr->id), X86_FEATURE_ARAT))
return;
- if (amd_e400_c1e_detected)
+ if (boot_cpu_has_bug(X86_BUG_AMD_APIC_C1E))
type = ACPI_STATE_C1;
/*