From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AH8x226k743VHzM/AYmjshf+xUhG3ekhPvqjYMuq6MTYR2ah3kNW7YjYSFUW+F1U+LGPY1R2ZrHh ARC-Seal: i=1; a=rsa-sha256; t=1516813055; cv=none; d=google.com; s=arc-20160816; b=CyKuVV6Me+2SAYSyT/6wqfwvj6lgQpdRj+Gjj8UJDSP0nOQCUwt6thyyjZbfFbYn+/ zGHFJvGitp2+MR/bNyNzeFhyOWiI1wdIN2uPNNSNVaVGPlMcgrdWzvRgLXslOAZ5juA6 GcGj9KK38z0da/yAKFJExpE7Aoyc42kM3hJ57sWq9CMLKJ3cQkfC0R9sQwF4q+wVSbxV xxhQgyi6SRVRHJbuGjS3gETlxJIvyto+WL3lBAFhx+gmcfKYMNkB5tKJoY5gY91mRcrn qmSL0NPEC9PeiUugLc3Dkw/zaxpB03fjHl3C3xCyaQ+D7V7I90KFn0sAGTmnbgUU3H5G TpYQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=references:in-reply-to:message-id:date:subject:to:from :dkim-signature:arc-authentication-results; bh=CRFGIkACYdhsrid2AXWnYI7AzR/KX37VuvJT4YNOP+I=; b=EqbeZ6UacXrhPbGxbCFVqYzZyNdHPhuPElSNr86jVN4Bb5Ug0KAbUUvaUQx8hIOgYd kc8gnflVfzGVIxO6H/CZucFArwj4stI/H1ZePhKSV03lKGOC0JT4fW9Z746VBT8DUun2 HlHPqllDatR6ysdheZNPW2ZIfnuPJVyrWInnja+EJcp1Gsg9WyuNvcoyDyt9ZHdjhL2U uT75N4Ki0sZks3Yg/egyquLLwKsTXFrB5OrGIX9rD4vsf1YEvRTn2Gpt93qmjch4jzCN yMoGpVRbvImoI4cTMlNr4B7ViAca8icFsG19bJLSuhEg+zd9jDnAbqRcOyBRB4ubBhKB 22hA== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@amazon.co.uk header.s=amazon201209 header.b=LMZ5KgNO; spf=pass (google.com: domain of prvs=55583cd03=dwmw@amazon.com designates 52.95.49.90 as permitted sender) smtp.mailfrom=prvs=55583cd03=dwmw@amazon.com; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=amazon.co.uk Authentication-Results: mx.google.com; dkim=pass header.i=@amazon.co.uk header.s=amazon201209 header.b=LMZ5KgNO; spf=pass (google.com: domain of prvs=55583cd03=dwmw@amazon.com designates 52.95.49.90 as permitted sender) smtp.mailfrom=prvs=55583cd03=dwmw@amazon.com; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=amazon.co.uk X-IronPort-AV: E=Sophos;i="5.46,408,1511827200"; d="scan'208";a="328962564" From: David Woodhouse To: arjan@linux.intel.com, tglx@linutronix.de, karahmed@amazon.de, x86@kernel.org, linux-kernel@vger.kernel.org, tim.c.chen@linux.intel.com, bp@alien8.de, peterz@infradead.org, pbonzini@redhat.com, ak@linux.intel.com, torvalds@linux-foundation.org, gregkh@linux-foundation.org, dave.hansen@intel.com, gnomes@lxorguk.ukuu.org.uk Subject: [PATCH v3 1/6] x86/cpufeatures: Add CPUID_7_EDX CPUID leaf Date: Wed, 24 Jan 2018 16:57:00 +0000 Message-Id: <1516813025-10794-2-git-send-email-dwmw@amazon.co.uk> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1516813025-10794-1-git-send-email-dwmw@amazon.co.uk> References: <1516813025-10794-1-git-send-email-dwmw@amazon.co.uk> X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1590493766117388034?= X-GMAIL-MSGID: =?utf-8?q?1590493766117388034?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: This is a pure feature bits leaf. We have two AVX512 feature bits in it already which were handled as scattered bits, and I'm about to add three more from this leaf for speculation control features. Signed-off-by: David Woodhouse Reviewed-by: Borislav Petkov --- arch/x86/include/asm/cpufeature.h | 7 +++++-- arch/x86/include/asm/cpufeatures.h | 8 +++++--- arch/x86/include/asm/disabled-features.h | 3 ++- arch/x86/include/asm/required-features.h | 3 ++- arch/x86/kernel/cpu/common.c | 1 + arch/x86/kernel/cpu/scattered.c | 2 -- 6 files changed, 15 insertions(+), 9 deletions(-) diff --git a/arch/x86/include/asm/cpufeature.h b/arch/x86/include/asm/cpufeature.h index ea9a7dd..70eddb3 100644 --- a/arch/x86/include/asm/cpufeature.h +++ b/arch/x86/include/asm/cpufeature.h @@ -29,6 +29,7 @@ enum cpuid_leafs CPUID_8000_000A_EDX, CPUID_7_ECX, CPUID_8000_0007_EBX, + CPUID_7_EDX, }; #ifdef CONFIG_X86_FEATURE_NAMES @@ -79,8 +80,9 @@ extern const char * const x86_bug_flags[NBUGINTS*32]; CHECK_BIT_IN_MASK_WORD(REQUIRED_MASK, 15, feature_bit) || \ CHECK_BIT_IN_MASK_WORD(REQUIRED_MASK, 16, feature_bit) || \ CHECK_BIT_IN_MASK_WORD(REQUIRED_MASK, 17, feature_bit) || \ + CHECK_BIT_IN_MASK_WORD(REQUIRED_MASK, 18, feature_bit) || \ REQUIRED_MASK_CHECK || \ - BUILD_BUG_ON_ZERO(NCAPINTS != 18)) + BUILD_BUG_ON_ZERO(NCAPINTS != 19)) #define DISABLED_MASK_BIT_SET(feature_bit) \ ( CHECK_BIT_IN_MASK_WORD(DISABLED_MASK, 0, feature_bit) || \ @@ -101,8 +103,9 @@ extern const char * const x86_bug_flags[NBUGINTS*32]; CHECK_BIT_IN_MASK_WORD(DISABLED_MASK, 15, feature_bit) || \ CHECK_BIT_IN_MASK_WORD(DISABLED_MASK, 16, feature_bit) || \ CHECK_BIT_IN_MASK_WORD(DISABLED_MASK, 17, feature_bit) || \ + CHECK_BIT_IN_MASK_WORD(DISABLED_MASK, 18, feature_bit) || \ DISABLED_MASK_CHECK || \ - BUILD_BUG_ON_ZERO(NCAPINTS != 18)) + BUILD_BUG_ON_ZERO(NCAPINTS != 19)) #define cpu_has(c, bit) \ (__builtin_constant_p(bit) && REQUIRED_MASK_BIT_SET(bit) ? 1 : \ diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cpufeatures.h index 25b9375..7b25cf3 100644 --- a/arch/x86/include/asm/cpufeatures.h +++ b/arch/x86/include/asm/cpufeatures.h @@ -13,7 +13,7 @@ /* * Defines x86 CPU feature bits */ -#define NCAPINTS 18 /* N 32-bit words worth of info */ +#define NCAPINTS 19 /* N 32-bit words worth of info */ #define NBUGINTS 1 /* N 32-bit bug flags */ /* @@ -206,8 +206,6 @@ #define X86_FEATURE_RETPOLINE ( 7*32+12) /* Generic Retpoline mitigation for Spectre variant 2 */ #define X86_FEATURE_RETPOLINE_AMD ( 7*32+13) /* AMD Retpoline mitigation for Spectre variant 2 */ #define X86_FEATURE_INTEL_PPIN ( 7*32+14) /* Intel Processor Inventory Number */ -#define X86_FEATURE_AVX512_4VNNIW ( 7*32+16) /* AVX-512 Neural Network Instructions */ -#define X86_FEATURE_AVX512_4FMAPS ( 7*32+17) /* AVX-512 Multiply Accumulation Single precision */ #define X86_FEATURE_MBA ( 7*32+18) /* Memory Bandwidth Allocation */ #define X86_FEATURE_RSB_CTXSW ( 7*32+19) /* Fill RSB on context switches */ @@ -319,6 +317,10 @@ #define X86_FEATURE_SUCCOR (17*32+ 1) /* Uncorrectable error containment and recovery */ #define X86_FEATURE_SMCA (17*32+ 3) /* Scalable MCA */ +/* Intel-defined CPU features, CPUID level 0x00000007:0 (EDX), word 18 */ +#define X86_FEATURE_AVX512_4VNNIW (18*32+ 2) /* AVX-512 Neural Network Instructions */ +#define X86_FEATURE_AVX512_4FMAPS (18*32+ 3) /* AVX-512 Multiply Accumulation Single precision */ + /* * BUG word(s) */ diff --git a/arch/x86/include/asm/disabled-features.h b/arch/x86/include/asm/disabled-features.h index e428e16..c6a3af1 100644 --- a/arch/x86/include/asm/disabled-features.h +++ b/arch/x86/include/asm/disabled-features.h @@ -71,6 +71,7 @@ #define DISABLED_MASK15 0 #define DISABLED_MASK16 (DISABLE_PKU|DISABLE_OSPKE|DISABLE_LA57) #define DISABLED_MASK17 0 -#define DISABLED_MASK_CHECK BUILD_BUG_ON_ZERO(NCAPINTS != 18) +#define DISABLED_MASK18 0 +#define DISABLED_MASK_CHECK BUILD_BUG_ON_ZERO(NCAPINTS != 19) #endif /* _ASM_X86_DISABLED_FEATURES_H */ diff --git a/arch/x86/include/asm/required-features.h b/arch/x86/include/asm/required-features.h index d91ba04..fb3a6de 100644 --- a/arch/x86/include/asm/required-features.h +++ b/arch/x86/include/asm/required-features.h @@ -106,6 +106,7 @@ #define REQUIRED_MASK15 0 #define REQUIRED_MASK16 (NEED_LA57) #define REQUIRED_MASK17 0 -#define REQUIRED_MASK_CHECK BUILD_BUG_ON_ZERO(NCAPINTS != 18) +#define REQUIRED_MASK18 0 +#define REQUIRED_MASK_CHECK BUILD_BUG_ON_ZERO(NCAPINTS != 19) #endif /* _ASM_X86_REQUIRED_FEATURES_H */ diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c index 372ba3f..e5d66e9 100644 --- a/arch/x86/kernel/cpu/common.c +++ b/arch/x86/kernel/cpu/common.c @@ -745,6 +745,7 @@ void get_cpu_cap(struct cpuinfo_x86 *c) cpuid_count(0x00000007, 0, &eax, &ebx, &ecx, &edx); c->x86_capability[CPUID_7_0_EBX] = ebx; c->x86_capability[CPUID_7_ECX] = ecx; + c->x86_capability[CPUID_7_EDX] = edx; } /* Extended state features: level 0x0000000d */ diff --git a/arch/x86/kernel/cpu/scattered.c b/arch/x86/kernel/cpu/scattered.c index d0e6976..df11f5d 100644 --- a/arch/x86/kernel/cpu/scattered.c +++ b/arch/x86/kernel/cpu/scattered.c @@ -21,8 +21,6 @@ struct cpuid_bit { static const struct cpuid_bit cpuid_bits[] = { { X86_FEATURE_APERFMPERF, CPUID_ECX, 0, 0x00000006, 0 }, { X86_FEATURE_EPB, CPUID_ECX, 3, 0x00000006, 0 }, - { X86_FEATURE_AVX512_4VNNIW, CPUID_EDX, 2, 0x00000007, 0 }, - { X86_FEATURE_AVX512_4FMAPS, CPUID_EDX, 3, 0x00000007, 0 }, { X86_FEATURE_CAT_L3, CPUID_EBX, 1, 0x00000010, 0 }, { X86_FEATURE_CAT_L2, CPUID_EBX, 2, 0x00000010, 0 }, { X86_FEATURE_CDP_L3, CPUID_ECX, 2, 0x00000010, 1 }, -- 2.7.4