linux-kernel - [PATCH v2 04/16] x86/zhaoxin: Use common IA32_FEATURE

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Message-Id: <20191022000816.1809-1-sean.j.christopherson@intel.com>
Date:   Mon, 21 Oct 2019 17:08:16 -0700
From:   Sean Christopherson <sean.j.christopherson@...el.com>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        x86@...nel.org
Cc:     "H. Peter Anvin" <hpa@...or.com>, linux-kernel@...r.kernel.org,
        Paolo Bonzini <pbonzini@...hat.com>,
        Radim Krčmář <rkrcmar@...hat.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>, kvm@...r.kernel.org,
        Sean Christopherson <sean.j.christopherson@...el.com>
Subject: [PATCH v2 04/16] x86/zhaoxin: Use common IA32_FEATURE_CONTROL MSR initialization

Use the recently added IA32_FEATURE_CONTROL MSR initialization sequence
to opportunstically enable VMX support when running on a Zhaoxin CPU.

Signed-off-by: Sean Christopherson <sean.j.christopherson@...el.com>
---
 arch/x86/Kconfig.cpu          | 2 +-
 arch/x86/kernel/cpu/zhaoxin.c | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/x86/Kconfig.cpu b/arch/x86/Kconfig.cpu
index 9e4e41424dc2..e78f39adae7b 100644
--- a/arch/x86/Kconfig.cpu
+++ b/arch/x86/Kconfig.cpu
@@ -389,7 +389,7 @@ config X86_DEBUGCTLMSR
 
 config X86_FEATURE_CONTROL_MSR
 	def_bool y
-	depends on CPU_SUP_INTEL || CPU_SUP_CENTAUR
+	depends on CPU_SUP_INTEL || CPU_SUP_CENTAUR || CPU_SUP_ZHAOXIN
 
 menuconfig PROCESSOR_SELECT
 	bool "Supported processor vendors" if EXPERT
diff --git a/arch/x86/kernel/cpu/zhaoxin.c b/arch/x86/kernel/cpu/zhaoxin.c
index 8e6f2f4b4afe..01b05a4a5a85 100644
--- a/arch/x86/kernel/cpu/zhaoxin.c
+++ b/arch/x86/kernel/cpu/zhaoxin.c
@@ -141,6 +141,8 @@ static void init_zhaoxin(struct cpuinfo_x86 *c)
 	set_cpu_cap(c, X86_FEATURE_LFENCE_RDTSC);
 #endif
 
+	init_feature_control_msr(c);
+
 	if (cpu_has(c, X86_FEATURE_VMX))
 		zhaoxin_detect_vmx_virtcap(c);
 }
-- 
2.22.0