From: Tony W Wang-oc <TonyWWang-oc@zhaoxin.com>
To: <rafael@kernel.org>, <len.brown@intel.com>, <pavel@ucw.cz>,
<tglx@linutronix.de>, <mingo@redhat.com>, <bp@alien8.de>,
<dave.hansen@linux.intel.com>, <x86@kernel.org>, <hpa@zytor.com>,
<linux-pm@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Cc: <CobeChen@zhaoxin.com>, <TimGuo@zhaoxin.com>,
<LindaChai@zhaoxin.com>, <LeoLiu@zhaoxin.com>
Subject: [PATCH] x86/cstate: Add Zhaoxin ACPI Cx FFH MWAIT support
Date: Wed, 22 Jun 2022 11:29:41 +0800 [thread overview]
Message-ID: <bccae278-e735-4681-cb3a-41359e42032b@zhaoxin.com> (raw)
Recent Zhaoxin CPUs support X86_FEATURE_MWAIT that implies the
MONITOR/MWAIT instructions can be used for ACPI Cx state. The BIOS
declares Cx state in _CST object to use FFH on Zhaoxin systems. So
let function ffh_cstate_init() support Zhaoxin too.
Signed-off-by: Tony W Wang-oc <TonyWWang-oc@zhaoxin.com>
---
arch/x86/kernel/acpi/cstate.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/arch/x86/kernel/acpi/cstate.c b/arch/x86/kernel/acpi/cstate.c
index 7945eae..d4185e1 100644
--- a/arch/x86/kernel/acpi/cstate.c
+++ b/arch/x86/kernel/acpi/cstate.c
@@ -213,7 +213,9 @@ static int __init ffh_cstate_init(void)
if (c->x86_vendor != X86_VENDOR_INTEL &&
c->x86_vendor != X86_VENDOR_AMD &&
- c->x86_vendor != X86_VENDOR_HYGON)
+ c->x86_vendor != X86_VENDOR_HYGON &&
+ c->x86_vendor != X86_VENDOR_CENTAUR &&
+ c->x86_vendor != X86_VENDOR_ZHAOXIN)
return -1;
cpu_cstate_entry = alloc_percpu(struct cstate_entry);
--
2.7.4
next reply other threads:[~2022-06-22 3:44 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-22 3:29 Tony W Wang-oc [this message]
2022-06-22 13:38 ` [PATCH] x86/cstate: Add Zhaoxin ACPI Cx FFH MWAIT support Rafael J. Wysocki
2022-06-23 1:10 ` Tony W Wang-oc
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