Message ID | 20200211174938.27809-5-maz@kernel.org (mailing list archive) |
---|---|
State | New, archived |
Headers | show
Return-Path: <SRS0=9UBk=37=lists.infradead.org=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@kernel.org> Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 90D8D14B4 for <patchwork-linux-arm@patchwork.kernel.org>; Tue, 11 Feb 2020 17:50:59 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 67C0920661 for <patchwork-linux-arm@patchwork.kernel.org>; Tue, 11 Feb 2020 17:50:59 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="fY/j/7Le"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="bidf3TOn" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 67C0920661 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org 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:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version: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=jFmiHbAtUGvkMtXemfi0+Hv/nWlTRd8z7mWxZET/LKQ=; b=fY/j/7Le8f6Wix s34mxW/S8fiwP6xJuEDOuM++6UuGV4jFCx64maQfQuVChZtzxIAG1ooclwbjkeudxeIZNrZSNA+w2 brxSNR2zvUjo1nSw8fEP47flUI3pTCR+gcGFRbdQv1lXgR/l8ptL0lyvRylcQthEsEO1zMS4M6AdK TwVUVOJ8/EIyCQv4ysAMDPRN0Y1a8yeej+vsJlS/91j3GSxvgBaeswWnQjInnUCVsl/pzmIlzCALb KZqdYg8X344tE+YA+lgA3gVk7v8oTbxiFba8emDbRGse9qhgipCvSTLTMT9+FCo5VedLi7QqpIpcZ eUFrnvttMCGjXpVWpM2w==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1j1ZgY-00017T-Cx; Tue, 11 Feb 2020 17:50:58 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1j1Zfa-0007MS-Aj for linux-arm-kernel@lists.infradead.org; Tue, 11 Feb 2020 17:49:59 +0000 Received: from disco-boy.misterjones.org (disco-boy.misterjones.org [51.254.78.96]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id E08DE2086A; Tue, 11 Feb 2020 17:49:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581443398; bh=vZYuRZEYB65TB5BcmIONClbvBia5wiG+UbdUv2W2Gl0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bidf3TOnosFS8mKox3Y7XNJQiv3wt2HAC43WhRps4CyrGo0e0auz4bpkSPeolSFfV rU60Gda2lcRS4mEdynFEKhC8vzdj4S87iE6LeWp3dReN/Z5s+mKxf1nrxXscQ+cJ4t CM8G0+YrndZeKSP1bIiQT+7F8nuvdXYV+DAoFEK8= Received: from 78.163-31-62.static.virginmediabusiness.co.uk ([62.31.163.78] helo=why.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from <maz@kernel.org>) id 1j1ZfY-004O7k-5R; Tue, 11 Feb 2020 17:49:56 +0000 From: Marc Zyngier <maz@kernel.org> To: linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org Subject: [PATCH v2 04/94] KVM: arm64: nv: Reset VCPU to EL2 registers if VCPU nested virt is set Date: Tue, 11 Feb 2020 17:48:08 +0000 Message-Id: <20200211174938.27809-5-maz@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200211174938.27809-1-maz@kernel.org> References: <20200211174938.27809-1-maz@kernel.org> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 62.31.163.78 X-SA-Exim-Rcpt-To: linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, andre.przywara@arm.com, christoffer.dall@arm.com, Dave.Martin@arm.com, jintack@cs.columbia.edu, alexandru.elisei@arm.com, james.morse@arm.com, julien.thierry.kdev@gmail.com, suzuki.poulose@arm.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200211_094958_404456_2DEE56E3 X-CRM114-Status: GOOD ( 15.45 ) X-Spam-Score: -5.2 (-----) X-Spam-Report: SpamAssassin version 3.4.3 on bombadil.infradead.org summary: Content analysis details: (-5.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -5.0 RCVD_IN_DNSWL_HI RBL: Sender listed at https://www.dnswl.org/, high trust [198.145.29.99 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.0 DKIMWL_WL_HIGH DKIMwl.org - Whitelisted High sender X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: <linux-arm-kernel.lists.infradead.org> List-Unsubscribe: <http://lists.infradead.org/mailman/options/linux-arm-kernel>, <mailto:linux-arm-kernel-request@lists.infradead.org?subject=unsubscribe> List-Archive: <http://lists.infradead.org/pipermail/linux-arm-kernel/> List-Post: <mailto:linux-arm-kernel@lists.infradead.org> List-Help: <mailto:linux-arm-kernel-request@lists.infradead.org?subject=help> List-Subscribe: <http://lists.infradead.org/mailman/listinfo/linux-arm-kernel>, <mailto:linux-arm-kernel-request@lists.infradead.org?subject=subscribe> Cc: Suzuki K Poulose <suzuki.poulose@arm.com>, Andre Przywara <andre.przywara@arm.com>, Christoffer Dall <christoffer.dall@arm.com>, Dave Martin <Dave.Martin@arm.com>, James Morse <james.morse@arm.com>, Alexandru Elisei <alexandru.elisei@arm.com>, Jintack Lim <jintack@cs.columbia.edu>, Julien Thierry <julien.thierry.kdev@gmail.com> Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" <linux-arm-kernel-bounces@lists.infradead.org> Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org |
Series |
KVM: arm64: ARMv8.3/8.4 Nested Virtualization support
|
expand
|
diff --git a/arch/arm64/kvm/reset.c b/arch/arm64/kvm/reset.c index 30b7ea680f66..5c50df274239 100644 --- a/arch/arm64/kvm/reset.c +++ b/arch/arm64/kvm/reset.c @@ -28,6 +28,7 @@ #include <asm/kvm_coproc.h> #include <asm/kvm_emulate.h> #include <asm/kvm_mmu.h> +#include <asm/kvm_nested.h> #include <asm/virt.h> /* Maximum phys_shift supported for any VM on this host */ @@ -36,15 +37,14 @@ static u32 kvm_ipa_limit; /* * ARMv8 Reset Values */ -static const struct kvm_regs default_regs_reset = { - .regs.pstate = (PSR_MODE_EL1h | PSR_A_BIT | PSR_I_BIT | - PSR_F_BIT | PSR_D_BIT), -}; +#define VCPU_RESET_PSTATE_EL1 (PSR_MODE_EL1h | PSR_A_BIT | PSR_I_BIT | \ + PSR_F_BIT | PSR_D_BIT) -static const struct kvm_regs default_regs_reset32 = { - .regs.pstate = (PSR_AA32_MODE_SVC | PSR_AA32_A_BIT | - PSR_AA32_I_BIT | PSR_AA32_F_BIT), -}; +#define VCPU_RESET_PSTATE_EL2 (PSR_MODE_EL2h | PSR_A_BIT | PSR_I_BIT | \ + PSR_F_BIT | PSR_D_BIT) + +#define VCPU_RESET_PSTATE_SVC (PSR_AA32_MODE_SVC | PSR_AA32_A_BIT | \ + PSR_AA32_I_BIT | PSR_AA32_F_BIT) static bool cpu_has_32bit_el1(void) { @@ -260,6 +260,7 @@ int kvm_reset_vcpu(struct kvm_vcpu *vcpu) const struct kvm_regs *cpu_reset; int ret = -EINVAL; bool loaded; + u32 pstate; /* Reset PMU outside of the non-preemptible section */ kvm_pmu_vcpu_reset(vcpu); @@ -288,18 +289,25 @@ int kvm_reset_vcpu(struct kvm_vcpu *vcpu) switch (vcpu->arch.target) { default: if (test_bit(KVM_ARM_VCPU_EL1_32BIT, vcpu->arch.features)) { - if (!cpu_has_32bit_el1()) + /* + * The CPU must support 32bit EL1, and 32bit + * NV is just not a thing... + */ + if (!cpu_has_32bit_el1() || nested_virt_in_use(vcpu)) goto out; - cpu_reset = &default_regs_reset32; + pstate = VCPU_RESET_PSTATE_SVC; + } else if (nested_virt_in_use(vcpu)) { + pstate = VCPU_RESET_PSTATE_EL2; } else { - cpu_reset = &default_regs_reset; + pstate = VCPU_RESET_PSTATE_EL1; } break; } /* Reset core registers */ - memcpy(vcpu_gp_regs(vcpu), cpu_reset, sizeof(*cpu_reset)); + memset(vcpu_gp_regs(vcpu), 0, sizeof(*cpu_reset)); + vcpu_gp_regs(vcpu)->regs.pstate = pstate; /* Reset system registers */ kvm_reset_sys_regs(vcpu);