From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-26.3 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT,USER_IN_DEF_DKIM_WL autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AF709C4338F for ; Wed, 4 Aug 2021 08:58:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9A18061073 for ; Wed, 4 Aug 2021 08:58:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236865AbhHDI7I (ORCPT ); Wed, 4 Aug 2021 04:59:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35162 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236863AbhHDI7F (ORCPT ); Wed, 4 Aug 2021 04:59:05 -0400 Received: from mail-qv1-xf4a.google.com (mail-qv1-xf4a.google.com [IPv6:2607:f8b0:4864:20::f4a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5CD67C0613D5 for ; Wed, 4 Aug 2021 01:58:53 -0700 (PDT) Received: by mail-qv1-xf4a.google.com with SMTP id u11-20020ad45aab0000b029033e289c093aso1294470qvg.10 for ; Wed, 04 Aug 2021 01:58:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=h8C+AkSSxjD2I6RXdGSsBwEWeDSTzFjVwyFJmn30s0c=; b=vdFpyj+9XNPjdYnHOx6TwDyWXfkwfTUZA5Sw6ri/Z+MfoVjX9B5ei1iIA6qchNTckg Js4/woRxok9rGl937dT5UR6w8jykMhwsS++V75ZeD8wlloCL6wCsYKsehUNaIOE43JeR Z2I0iFTOk5qzEKQKx3u2dbLLBMotmDxqqKCR94OqjLYyygFGecaxna6m9TnnTENZ1dlO BcCV64E3066DzzNmcmkPW3oPneJUjkCGeWxgt3hXPaU/8EVSRFSD6lZNyz1DT33Lkoi7 qZmZBVlnNgK5BwZRYc/LHdxEGICI0QBX432vw8WwyIBzzYfANL3FddNoQdY4qIW6LGFV epqw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=h8C+AkSSxjD2I6RXdGSsBwEWeDSTzFjVwyFJmn30s0c=; b=G4v2mRAdLq1jIkjxb1oWOaQ3Ogawn/gDdoGTnrut+Zsdz5tDJpUZrM7Y1ML+7hg8ZR 3cm+R3T9Xby9/INUIPzuDMIYI29im1Gja3G0X1Iy4nMNe6K8Pxhh9sdj+SiVg39NwCxh KkheJxJjpEt3swGI5u4Id1JS3nPrUulsJ09EA9B5T6JA6s3YaMGYJkFV2ylDRBKmON9C othjTuyjg9gI2Jxg4F4I3ttOEsBm7Yu8zWCFu+VHymzhabQbGI2pke5MNAXMzS4CyfJF vfbGhvIjj9ScJ8E7+vuteDChfKSDvjsLtj5slvaZLWSLLpsclJOK+CsXUJZhxoT2WAsn Daxg== X-Gm-Message-State: AOAM532rj5k+v8Z7ClZHkOJ0kiFteH4iOwC0wMgev+akqNdnugsw9FDU 0B6reW/DcxzLx93HC6MghY4jhXTID4tPNfF92+AZB+79/+/Cph9RYNuRve3XYVrVSmsF+NVZj2S aN3P4JPU216I536YyVcfuobNd/6rwJfbBXtofoIr44whzNwkTbr0VKz5h5Q== X-Google-Smtp-Source: ABdhPJx+GeA32n6jMUHsP7WogSpQpinH4eyTOFkLIo8qvlVC8zogWUDIRuiTAtVqSj3R5xgXeAPAlnAcOpw= X-Received: from oupton.c.googlers.com ([fda3:e722:ac3:cc00:2b:ff92:c0a8:404]) (user=oupton job=sendgmr) by 2002:a05:6214:134c:: with SMTP id b12mr24474131qvw.39.1628067532459; Wed, 04 Aug 2021 01:58:52 -0700 (PDT) Date: Wed, 4 Aug 2021 08:58:14 +0000 In-Reply-To: <20210804085819.846610-1-oupton@google.com> Message-Id: <20210804085819.846610-17-oupton@google.com> Mime-Version: 1.0 References: <20210804085819.846610-1-oupton@google.com> X-Mailer: git-send-email 2.32.0.605.g8dce9f2422-goog Subject: [PATCH v6 16/21] arm64: cpufeature: Enumerate support for Enhanced Counter Virtualization From: Oliver Upton To: kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu Cc: Paolo Bonzini , Sean Christopherson , Marc Zyngier , Peter Shier , Jim Mattson , David Matlack , Ricardo Koller , Jing Zhang , Raghavendra Rao Anata , James Morse , Alexandru Elisei , Suzuki K Poulose , linux-arm-kernel@lists.infradead.org, Andrew Jones , Will Deacon , Catalin Marinas , Oliver Upton Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Introduce a new cpucap to indicate if the system supports full enhanced counter virtualization (i.e. ID_AA64MMFR0_EL1.ECV==0x2). Signed-off-by: Oliver Upton --- arch/arm64/include/asm/sysreg.h | 2 ++ arch/arm64/kernel/cpufeature.c | 10 ++++++++++ arch/arm64/tools/cpucaps | 1 + 3 files changed, 13 insertions(+) diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h index 7b9c3acba684..4dfc44066dfb 100644 --- a/arch/arm64/include/asm/sysreg.h +++ b/arch/arm64/include/asm/sysreg.h @@ -847,6 +847,8 @@ #define ID_AA64MMFR0_ASID_SHIFT 4 #define ID_AA64MMFR0_PARANGE_SHIFT 0 +#define ID_AA64MMFR0_ECV_VIRT 0x1 +#define ID_AA64MMFR0_ECV_PHYS 0x2 #define ID_AA64MMFR0_TGRAN4_NI 0xf #define ID_AA64MMFR0_TGRAN4_SUPPORTED 0x0 #define ID_AA64MMFR0_TGRAN64_NI 0xf diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index 0ead8bfedf20..94c349e179d3 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -2301,6 +2301,16 @@ static const struct arm64_cpu_capabilities arm64_features[] = { .matches = has_cpuid_feature, .min_field_value = 1, }, + { + .desc = "Enhanced Counter Virtualization (Physical)", + .capability = ARM64_ECV, + .type = ARM64_CPUCAP_SYSTEM_FEATURE, + .sys_reg = SYS_ID_AA64MMFR0_EL1, + .sign = FTR_UNSIGNED, + .field_pos = ID_AA64MMFR0_ECV_SHIFT, + .matches = has_cpuid_feature, + .min_field_value = ID_AA64MMFR0_ECV_PHYS, + }, {}, }; diff --git a/arch/arm64/tools/cpucaps b/arch/arm64/tools/cpucaps index 49305c2e6dfd..d819ea614da5 100644 --- a/arch/arm64/tools/cpucaps +++ b/arch/arm64/tools/cpucaps @@ -3,6 +3,7 @@ # Internal CPU capabilities constants, keep this list sorted BTI +ECV # Unreliable: use system_supports_32bit_el0() instead. 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charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu Introduce a new cpucap to indicate if the system supports full enhanced counter virtualization (i.e. ID_AA64MMFR0_EL1.ECV==0x2). Signed-off-by: Oliver Upton --- arch/arm64/include/asm/sysreg.h | 2 ++ arch/arm64/kernel/cpufeature.c | 10 ++++++++++ arch/arm64/tools/cpucaps | 1 + 3 files changed, 13 insertions(+) diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h index 7b9c3acba684..4dfc44066dfb 100644 --- a/arch/arm64/include/asm/sysreg.h +++ b/arch/arm64/include/asm/sysreg.h @@ -847,6 +847,8 @@ #define ID_AA64MMFR0_ASID_SHIFT 4 #define ID_AA64MMFR0_PARANGE_SHIFT 0 +#define ID_AA64MMFR0_ECV_VIRT 0x1 +#define ID_AA64MMFR0_ECV_PHYS 0x2 #define ID_AA64MMFR0_TGRAN4_NI 0xf #define ID_AA64MMFR0_TGRAN4_SUPPORTED 0x0 #define ID_AA64MMFR0_TGRAN64_NI 0xf diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index 0ead8bfedf20..94c349e179d3 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -2301,6 +2301,16 @@ static const struct arm64_cpu_capabilities arm64_features[] = { .matches = has_cpuid_feature, .min_field_value = 1, }, + { + .desc = "Enhanced Counter Virtualization (Physical)", + .capability = ARM64_ECV, + .type = ARM64_CPUCAP_SYSTEM_FEATURE, + .sys_reg = SYS_ID_AA64MMFR0_EL1, + .sign = FTR_UNSIGNED, + .field_pos = ID_AA64MMFR0_ECV_SHIFT, + .matches = has_cpuid_feature, + .min_field_value = ID_AA64MMFR0_ECV_PHYS, + }, {}, }; diff --git a/arch/arm64/tools/cpucaps b/arch/arm64/tools/cpucaps index 49305c2e6dfd..d819ea614da5 100644 --- a/arch/arm64/tools/cpucaps +++ b/arch/arm64/tools/cpucaps @@ -3,6 +3,7 @@ # Internal CPU capabilities constants, keep this list sorted BTI +ECV # Unreliable: use system_supports_32bit_el0() instead. 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Introduce a new cpucap to indicate if the system supports full enhanced counter virtualization (i.e. ID_AA64MMFR0_EL1.ECV==0x2). Signed-off-by: Oliver Upton --- arch/arm64/include/asm/sysreg.h | 2 ++ arch/arm64/kernel/cpufeature.c | 10 ++++++++++ arch/arm64/tools/cpucaps | 1 + 3 files changed, 13 insertions(+) diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h index 7b9c3acba684..4dfc44066dfb 100644 --- a/arch/arm64/include/asm/sysreg.h +++ b/arch/arm64/include/asm/sysreg.h @@ -847,6 +847,8 @@ #define ID_AA64MMFR0_ASID_SHIFT 4 #define ID_AA64MMFR0_PARANGE_SHIFT 0 +#define ID_AA64MMFR0_ECV_VIRT 0x1 +#define ID_AA64MMFR0_ECV_PHYS 0x2 #define ID_AA64MMFR0_TGRAN4_NI 0xf #define ID_AA64MMFR0_TGRAN4_SUPPORTED 0x0 #define ID_AA64MMFR0_TGRAN64_NI 0xf diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index 0ead8bfedf20..94c349e179d3 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -2301,6 +2301,16 @@ static const struct arm64_cpu_capabilities arm64_features[] = { .matches = has_cpuid_feature, .min_field_value = 1, }, + { + .desc = "Enhanced Counter Virtualization (Physical)", + .capability = ARM64_ECV, + .type = ARM64_CPUCAP_SYSTEM_FEATURE, + .sys_reg = SYS_ID_AA64MMFR0_EL1, + .sign = FTR_UNSIGNED, + .field_pos = ID_AA64MMFR0_ECV_SHIFT, + .matches = has_cpuid_feature, + .min_field_value = ID_AA64MMFR0_ECV_PHYS, + }, {}, }; diff --git a/arch/arm64/tools/cpucaps b/arch/arm64/tools/cpucaps index 49305c2e6dfd..d819ea614da5 100644 --- a/arch/arm64/tools/cpucaps +++ b/arch/arm64/tools/cpucaps @@ -3,6 +3,7 @@ # Internal CPU capabilities constants, keep this list sorted BTI +ECV # Unreliable: use system_supports_32bit_el0() instead. HAS_32BIT_EL0_DO_NOT_USE HAS_32BIT_EL1 -- 2.32.0.605.g8dce9f2422-goog _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel