From patchwork Mon Feb 18 19:52:37 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dave Martin X-Patchwork-Id: 10818773 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 89D081390 for ; Mon, 18 Feb 2019 19:57:41 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 756A82B7B2 for ; Mon, 18 Feb 2019 19:57:41 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 697F22BAD8; Mon, 18 Feb 2019 19:57:41 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id E619B2B7B2 for ; Mon, 18 Feb 2019 19:57:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=XGQ0gyadvayuVKbYB9Iu3NhMNIjJyGhnitMANQt1IrE=; b=ejaA3dpWlYJIOfJ2FQSqFQ1JIB JZ3CNVpcidrWFs/N0H9nEeh2LAXKg0iZkTqHAU7D1WoTewO1JFsfZEppVkjpjvSUxm0OiSMagvHuJ gAgFoCObWgapQkAOsBvOwDjeFm+SeeiVkEUrq3EqqLyoqczVdVOnqE8o7NS+NyQ+/TomZMpt6pXHi UWd72sGuoGAFthuKFbrdbrh+vMUrTFkLosJVO8W4MsY6gAJ6QJ/G9EUgv8WaVf+EC2+hHSVyprjVY NFQInz6DWCttSqLJgZeCnPxrOZId8Eox2/ZjeR0dTyzB0xDd3ZgUvBSNzPO2FfLe1hHoEa3yVbNfG 8XL9r0Bg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gvp2j-0000wP-7s; Mon, 18 Feb 2019 19:57:33 +0000 Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70] helo=foss.arm.com) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gvozt-00055q-N6 for linux-arm-kernel@lists.infradead.org; Mon, 18 Feb 2019 19:54:56 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 5828E2D91; Mon, 18 Feb 2019 11:54:36 -0800 (PST) Received: from e103592.cambridge.arm.com (usa-sjc-imap-foss1.foss.arm.com [10.72.51.249]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 406D73FB75; Mon, 18 Feb 2019 11:54:19 -0800 (PST) From: Dave Martin To: kvmarm@lists.cs.columbia.edu Subject: [PATCH v5 24/26] KVM: arm64: Add a capabillity to advertise SVE support Date: Mon, 18 Feb 2019 19:52:37 +0000 Message-Id: <1550519559-15915-25-git-send-email-Dave.Martin@arm.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1550519559-15915-1-git-send-email-Dave.Martin@arm.com> References: <1550519559-15915-1-git-send-email-Dave.Martin@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190218_115437_883106_808F2529 X-CRM114-Status: GOOD ( 14.74 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell , Okamoto Takayuki , Christoffer Dall , Ard Biesheuvel , Marc Zyngier , Catalin Marinas , Will Deacon , Zhang Lei , Julien Grall , =?utf-8?q?Alex_Benn=C3=A9e?= , linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP To provide a uniform way to check for KVM SVE support amongst other features, this patch adds a suitable capability KVM_CAP_ARM_SVE, and reports it as present when SVE is available. Signed-off-by: Dave Martin Reviewed-by: Julien Thierry --- arch/arm64/kvm/reset.c | 8 ++++++++ include/uapi/linux/kvm.h | 1 + 2 files changed, 9 insertions(+) diff --git a/arch/arm64/kvm/reset.c b/arch/arm64/kvm/reset.c index e67cd2e..f636b34 100644 --- a/arch/arm64/kvm/reset.c +++ b/arch/arm64/kvm/reset.c @@ -35,6 +35,7 @@ #include #include #include +#include /* Maximum phys_shift supported for any VM on this host */ static u32 kvm_ipa_limit; @@ -93,6 +94,9 @@ int kvm_arch_vm_ioctl_check_extension(struct kvm *kvm, long ext) case KVM_CAP_ARM_VM_IPA_SIZE: r = kvm_ipa_limit; break; + case KVM_CAP_ARM_SVE: + r = system_supports_sve(); + break; default: r = 0; } @@ -105,6 +109,10 @@ static int kvm_reset_sve(struct kvm_vcpu *vcpu) if (!system_supports_sve()) return -EINVAL; + /* Verify that KVM startup enforced this when SVE was detected: */ + if (WARN_ON(!has_vhe())) + return -EINVAL; + /* If resetting an already-configured vcpu, just zero the SVE regs: */ if (vcpu->arch.sve_state) { size_t size = vcpu_sve_state_size(vcpu); diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h index dc77a5a..4ea0d92 100644 --- a/include/uapi/linux/kvm.h +++ b/include/uapi/linux/kvm.h @@ -988,6 +988,7 @@ struct kvm_ppc_resize_hpt { #define KVM_CAP_ARM_VM_IPA_SIZE 165 #define KVM_CAP_MANUAL_DIRTY_LOG_PROTECT 166 #define KVM_CAP_HYPERV_CPUID 167 +#define KVM_CAP_ARM_SVE 168 #ifdef KVM_CAP_IRQ_ROUTING