diff options
| author | Pu Wen <puwen@hygon.cn> | 2018-09-23 17:34:32 +0800 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2018-09-27 18:28:57 +0200 |
| commit | 0b13bec787dccca96f8c431da732657ae01baf9a (patch) | |
| tree | 362e64286770b94a150005cbfe6f7db8d08a7c9d | |
| parent | 39dc6f154dac134e4612827cb5283934c1862cb8 (diff) | |
| download | linux-0b13bec787dccca96f8c431da732657ae01baf9a.tar.bz2 | |
x86/smpboot: Do not use BSP INIT delay and MWAIT to idle on Dhyana
The Hygon Dhyana CPU uses no delay in smp_quirk_init_udelay(), and does
HLT on idle just like AMD does.
Signed-off-by: Pu Wen <puwen@hygon.cn>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Borislav Petkov <bp@suse.de>
Cc: bp@alien8.de
Cc: tglx@linutronix.de
Cc: mingo@redhat.com
Cc: hpa@zytor.com
Cc: x86@kernel.org
Cc: thomas.lendacky@amd.com
Link: https://lkml.kernel.org/r/87000fa82e273f5967c908448414228faf61e077.1537533369.git.puwen@hygon.cn
| -rw-r--r-- | arch/x86/kernel/smpboot.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c index f02ecaf97904..5369d7fac797 100644 --- a/arch/x86/kernel/smpboot.c +++ b/arch/x86/kernel/smpboot.c @@ -676,6 +676,7 @@ static void __init smp_quirk_init_udelay(void) /* if modern processor, use no delay */ if (((boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) && (boot_cpu_data.x86 == 6)) || + ((boot_cpu_data.x86_vendor == X86_VENDOR_HYGON) && (boot_cpu_data.x86 >= 0x18)) || ((boot_cpu_data.x86_vendor == X86_VENDOR_AMD) && (boot_cpu_data.x86 >= 0xF))) { init_udelay = 0; return; @@ -1592,7 +1593,8 @@ static inline void mwait_play_dead(void) void *mwait_ptr; int i; - if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD) + if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD || + boot_cpu_data.x86_vendor == X86_VENDOR_HYGON) return; if (!this_cpu_has(X86_FEATURE_MWAIT)) return; |