diff mbox series

[v2,04/17] x86/smpboot: smp init nodelay and no flush caches before sleep

Message ID 1532352037-7151-5-git-send-email-puwen@hygon.cn (mailing list archive)
State New, archived
Headers show
Series Add support for Hygon Dhyana Family 18h processor | expand

Commit Message

Pu Wen July 23, 2018, 1:20 p.m. UTC 
Dhyana use no delay in smp_quirk_init_udelay(), and return in
mwait_play_dead() as AMD does.

Signed-off-by: Pu Wen <puwen@hygon.cn>
---
 arch/x86/kernel/smpboot.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index db9656e..26cb2c9 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -658,6 +658,7 @@  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;
@@ -1574,7 +1575,8 @@  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;