From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754507AbeDTKNX (ORCPT ); Fri, 20 Apr 2018 06:13:23 -0400 Received: from terminus.zytor.com ([198.137.202.136]:33551 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754294AbeDTKNV (ORCPT ); Fri, 20 Apr 2018 06:13:21 -0400 Date: Fri, 20 Apr 2018 03:13:10 -0700 From: tip-bot for David Wang Message-ID: Cc: davidwang@zhaoxin.com, linux-kernel@vger.kernel.org, hpa@zytor.com, mingo@kernel.org, tglx@linutronix.de Reply-To: davidwang@zhaoxin.com, linux-kernel@vger.kernel.org, tglx@linutronix.de, hpa@zytor.com, mingo@kernel.org In-Reply-To: <1524212968-28998-1-git-send-email-davidwang@zhaoxin.com> References: <1524212968-28998-1-git-send-email-davidwang@zhaoxin.com> To: linux-tip-commits@vger.kernel.org Subject: [tip:x86/cpu] x86/Centaur: Initialize supported CPU features properly Git-Commit-ID: 60882cc159e1416fb1d17210de60d4a3ba04e613 X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: 60882cc159e1416fb1d17210de60d4a3ba04e613 Gitweb: https://git.kernel.org/tip/60882cc159e1416fb1d17210de60d4a3ba04e613 Author: David Wang AuthorDate: Fri, 20 Apr 2018 16:29:28 +0800 Committer: Thomas Gleixner CommitDate: Fri, 20 Apr 2018 12:08:17 +0200 x86/Centaur: Initialize supported CPU features properly Centaur CPUs have some Intel compatible capabilities,including Permformance Monitoring Counters and CPU virtualization capabilities. Initialize them in the Centaur specific init code. Signed-off-by: David Wang Signed-off-by: Thomas Gleixner Cc: lukelin@viacpu.com Cc: qiyuanwang@zhaoxin.com Cc: gregkh@linuxfoundation.org Cc: brucechang@via-alliance.com Cc: timguo@zhaoxin.com Cc: cooperyan@zhaoxin.com Cc: hpa@zytor.com Cc: benjaminpan@viatech.com Link: https://lkml.kernel.org/r/1524212968-28998-1-git-send-email-davidwang@zhaoxin.com --- arch/x86/kernel/cpu/centaur.c | 48 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) diff --git a/arch/x86/kernel/cpu/centaur.c b/arch/x86/kernel/cpu/centaur.c index e5ec0f11c0de..80d5110481ec 100644 --- a/arch/x86/kernel/cpu/centaur.c +++ b/arch/x86/kernel/cpu/centaur.c @@ -18,6 +18,13 @@ #define RNG_ENABLED (1 << 3) #define RNG_ENABLE (1 << 6) /* MSR_VIA_RNG */ +#define X86_VMX_FEATURE_PROC_CTLS_TPR_SHADOW 0x00200000 +#define X86_VMX_FEATURE_PROC_CTLS_VNMI 0x00400000 +#define X86_VMX_FEATURE_PROC_CTLS_2ND_CTLS 0x80000000 +#define X86_VMX_FEATURE_PROC_CTLS2_VIRT_APIC 0x00000001 +#define X86_VMX_FEATURE_PROC_CTLS2_EPT 0x00000002 +#define X86_VMX_FEATURE_PROC_CTLS2_VPID 0x00000020 + static void init_c3(struct cpuinfo_x86 *c) { u32 lo, hi; @@ -112,6 +119,31 @@ static void early_init_centaur(struct cpuinfo_x86 *c) } } +static void centaur_detect_vmx_virtcap(struct cpuinfo_x86 *c) +{ + u32 vmx_msr_low, vmx_msr_high, msr_ctl, msr_ctl2; + + rdmsr(MSR_IA32_VMX_PROCBASED_CTLS, vmx_msr_low, vmx_msr_high); + msr_ctl = vmx_msr_high | vmx_msr_low; + + if (msr_ctl & X86_VMX_FEATURE_PROC_CTLS_TPR_SHADOW) + set_cpu_cap(c, X86_FEATURE_TPR_SHADOW); + if (msr_ctl & X86_VMX_FEATURE_PROC_CTLS_VNMI) + set_cpu_cap(c, X86_FEATURE_VNMI); + if (msr_ctl & X86_VMX_FEATURE_PROC_CTLS_2ND_CTLS) { + rdmsr(MSR_IA32_VMX_PROCBASED_CTLS2, + vmx_msr_low, vmx_msr_high); + msr_ctl2 = vmx_msr_high | vmx_msr_low; + if ((msr_ctl2 & X86_VMX_FEATURE_PROC_CTLS2_VIRT_APIC) && + (msr_ctl & X86_VMX_FEATURE_PROC_CTLS_TPR_SHADOW)) + set_cpu_cap(c, X86_FEATURE_FLEXPRIORITY); + if (msr_ctl2 & X86_VMX_FEATURE_PROC_CTLS2_EPT) + set_cpu_cap(c, X86_FEATURE_EPT); + if (msr_ctl2 & X86_VMX_FEATURE_PROC_CTLS2_VPID) + set_cpu_cap(c, X86_FEATURE_VPID); + } +} + static void init_centaur(struct cpuinfo_x86 *c) { #ifdef CONFIG_X86_32 @@ -128,6 +160,19 @@ static void init_centaur(struct cpuinfo_x86 *c) clear_cpu_cap(c, 0*32+31); #endif early_init_centaur(c); + + if (c->cpuid_level > 9) { + unsigned int eax = cpuid_eax(10); + + /* + * Check for version and the number of counters + * Version(eax[7:0]) can't be 0; + * Counters(eax[15:8]) should be greater than 1; + */ + if ((eax & 0xff) && (((eax >> 8) & 0xff) > 1)) + set_cpu_cap(c, X86_FEATURE_ARCH_PERFMON); + } + switch (c->x86) { #ifdef CONFIG_X86_32 case 5: @@ -199,6 +244,9 @@ static void init_centaur(struct cpuinfo_x86 *c) #ifdef CONFIG_X86_64 set_cpu_cap(c, X86_FEATURE_LFENCE_RDTSC); #endif + + if (cpu_has(c, X86_FEATURE_VMX)) + centaur_detect_vmx_virtcap(c); } #ifdef CONFIG_X86_32