linux-kernel - [RFC PATCH 09/10] arch/x86: Add AMD feature bit X86_FEATURE

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20180924191841.29111-10-babu.moger@amd.com>
Date:   Mon, 24 Sep 2018 19:19:14 +0000
From:   "Moger, Babu" <Babu.Moger@....com>
To:     "tglx@...utronix.de" <tglx@...utronix.de>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "hpa@...or.com" <hpa@...or.com>,
        "fenghua.yu@...el.com" <fenghua.yu@...el.com>,
        "reinette.chatre@...el.com" <reinette.chatre@...el.com>,
        "vikas.shivappa@...ux.intel.com" <vikas.shivappa@...ux.intel.com>,
        "tony.luck@...el.com" <tony.luck@...el.com>
CC:     "x86@...nel.org" <x86@...nel.org>,
        "peterz@...radead.org" <peterz@...radead.org>,
        "Moger, Babu" <Babu.Moger@....com>,
        "pombredanne@...b.com" <pombredanne@...b.com>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "kstewart@...uxfoundation.org" <kstewart@...uxfoundation.org>,
        "bp@...e.de" <bp@...e.de>,
        "rafael.j.wysocki@...el.com" <rafael.j.wysocki@...el.com>,
        "ak@...ux.intel.com" <ak@...ux.intel.com>,
        "kirill.shutemov@...ux.intel.com" <kirill.shutemov@...ux.intel.com>,
        "xiaochen.shen@...el.com" <xiaochen.shen@...el.com>,
        "colin.king@...onical.com" <colin.king@...onical.com>,
        "Hurwitz, Sherry" <sherry.hurwitz@....com>,
        "Lendacky, Thomas" <Thomas.Lendacky@....com>,
        "pbonzini@...hat.com" <pbonzini@...hat.com>,
        "dwmw@...zon.co.uk" <dwmw@...zon.co.uk>,
        "luto@...nel.org" <luto@...nel.org>,
        "jroedel@...e.de" <jroedel@...e.de>,
        "jannh@...gle.com" <jannh@...gle.com>,
        "dima@...sta.com" <dima@...sta.com>,
        "jpoimboe@...hat.com" <jpoimboe@...hat.com>,
        "vkuznets@...hat.com" <vkuznets@...hat.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [RFC PATCH 09/10] arch/x86: Add AMD feature bit X86_FEATURE_MBA in
 cpuid bits array

From: Sherry Hurwitz <sherry.hurwitz@....com>

The feature bit X86_FEATURE_MBA is detected via CPUID leaf 0x80000008
EBX Bit 06. This bit indicates the support of AMD's MBA feature.

Signed-off-by: Babu Moger <babu.moger@....com>
Signed-off-by: Sherry Hurwitz <sherry.hurwitz@....com>
---
 arch/x86/kernel/cpu/scattered.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/kernel/cpu/scattered.c b/arch/x86/kernel/cpu/scattered.c
index 772c219b6889..602f3725f6c4 100644
--- a/arch/x86/kernel/cpu/scattered.c
+++ b/arch/x86/kernel/cpu/scattered.c
@@ -29,6 +29,7 @@ static const struct cpuid_bit cpuid_bits[] = {
 	{ X86_FEATURE_HW_PSTATE,	CPUID_EDX,  7, 0x80000007, 0 },
 	{ X86_FEATURE_CPB,		CPUID_EDX,  9, 0x80000007, 0 },
 	{ X86_FEATURE_PROC_FEEDBACK,    CPUID_EDX, 11, 0x80000007, 0 },
+	{ X86_FEATURE_MBA,		CPUID_EBX,  6, 0x80000008, 0 },
 	{ X86_FEATURE_SME,		CPUID_EAX,  0, 0x8000001f, 0 },
 	{ X86_FEATURE_SEV,		CPUID_EAX,  1, 0x8000001f, 0 },
 	{ 0, 0, 0, 0, 0 }
-- 
2.17.1