linux-kernel - [PATCH 4/4] x86/cpu: Update init data for new Airmont CPU model

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Message-Id: <20190905193020.14707-5-tony.luck@intel.com>
Date:   Thu,  5 Sep 2019 12:30:20 -0700
From:   Tony Luck <tony.luck@...el.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Rahul Tanwar <rahul.tanwar@...ux.intel.com>,
        Tony Luck <tony.luck@...el.com>,
        Gayatri Kammela <gayatri.kammela@...el.com>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 4/4] x86/cpu: Update init data for new Airmont CPU model

From: Rahul Tanwar <rahul.tanwar@...ux.intel.com>

Update properties for newly added Airmont CPU variant.

Signed-off-by: Rahul Tanwar <rahul.tanwar@...ux.intel.com>
Signed-off-by: Tony Luck <tony.luck@...el.com>
---
 arch/x86/kernel/cpu/common.c | 1 +
 arch/x86/kernel/cpu/intel.c  | 1 +
 arch/x86/kernel/tsc_msr.c    | 5 +++++
 3 files changed, 7 insertions(+)

diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 5cedb679215e..9ae7d1bcd4f4 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -1059,6 +1059,7 @@ static const __initconst struct x86_cpu_id cpu_vuln_whitelist[] = {
 	VULNWL_INTEL(CORE_YONAH,		NO_SSB),
 
 	VULNWL_INTEL(ATOM_AIRMONT_MID,		NO_L1TF | MSBDS_ONLY | NO_SWAPGS),
+	VULNWL_INTEL(ATOM_AIRMONT_NP,		NO_L1TF | NO_SWAPGS),
 
 	VULNWL_INTEL(ATOM_GOLDMONT,		NO_MDS | NO_L1TF | NO_SWAPGS),
 	VULNWL_INTEL(ATOM_GOLDMONT_D,		NO_MDS | NO_L1TF | NO_SWAPGS),
diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c
index e2082ccccf13..c2fdc00df163 100644
--- a/arch/x86/kernel/cpu/intel.c
+++ b/arch/x86/kernel/cpu/intel.c
@@ -268,6 +268,7 @@ static void early_init_intel(struct cpuinfo_x86 *c)
 		case INTEL_FAM6_ATOM_SALTWELL_MID:
 		case INTEL_FAM6_ATOM_SALTWELL_TABLET:
 		case INTEL_FAM6_ATOM_SILVERMONT_MID:
+		case INTEL_FAM6_ATOM_AIRMONT_NP:
 			set_cpu_cap(c, X86_FEATURE_NONSTOP_TSC_S3);
 			break;
 		default:
diff --git a/arch/x86/kernel/tsc_msr.c b/arch/x86/kernel/tsc_msr.c
index 067858fe4db8..e0cbe4f2af49 100644
--- a/arch/x86/kernel/tsc_msr.c
+++ b/arch/x86/kernel/tsc_msr.c
@@ -58,6 +58,10 @@ static const struct freq_desc freq_desc_ann = {
 	1, { 83300, 100000, 133300, 100000, 0, 0, 0, 0 }
 };
 
+static const struct freq_desc freq_desc_lgm = {
+	1, { 78000, 78000, 78000, 78000, 78000, 78000, 78000, 78000 }
+};
+
 static const struct x86_cpu_id tsc_msr_cpu_ids[] = {
 	INTEL_CPU_FAM6(ATOM_SALTWELL_MID,	freq_desc_pnw),
 	INTEL_CPU_FAM6(ATOM_SALTWELL_TABLET,	freq_desc_clv),
@@ -65,6 +69,7 @@ static const struct x86_cpu_id tsc_msr_cpu_ids[] = {
 	INTEL_CPU_FAM6(ATOM_SILVERMONT_MID,	freq_desc_tng),
 	INTEL_CPU_FAM6(ATOM_AIRMONT,		freq_desc_cht),
 	INTEL_CPU_FAM6(ATOM_AIRMONT_MID,	freq_desc_ann),
+	INTEL_CPU_FAM6(ATOM_AIRMONT_NP,		freq_desc_lgm),
 	{}
 };
 
-- 
2.20.1