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[209.132.180.67]) by mx.google.com with ESMTP id e186si87707361pgc.45.2017.01.08.22.26.13; Sun, 08 Jan 2017 22:26:13 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S939681AbdAIG0E (ORCPT + 25 others); Mon, 9 Jan 2017 01:26:04 -0500 Received: from outprodmail01.cc.columbia.edu ([128.59.72.39]:38011 "EHLO outprodmail01.cc.columbia.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S939371AbdAIGZm (ORCPT ); Mon, 9 Jan 2017 01:25:42 -0500 Received: from hazelnut (hazelnut.cc.columbia.edu [128.59.213.250]) by outprodmail01.cc.columbia.edu (8.14.4/8.14.4) with ESMTP id v096PW8c017317 for ; Mon, 9 Jan 2017 01:25:41 -0500 Received: from hazelnut (localhost.localdomain [127.0.0.1]) by hazelnut (Postfix) with ESMTP id CF0FB8A for ; Mon, 9 Jan 2017 01:25:41 -0500 (EST) Received: from sendprodmail03.cc.columbia.edu (sendprodmail03.cc.columbia.edu [128.59.72.15]) by hazelnut (Postfix) with ESMTP id 9EB6287 for ; Mon, 9 Jan 2017 01:25:41 -0500 (EST) Received: from mail-qk0-f199.google.com (mail-qk0-f199.google.com [209.85.220.199]) by sendprodmail03.cc.columbia.edu (8.14.4/8.14.4) with ESMTP id v096Pfwd056611 (version=TLSv1/SSLv3 cipher=AES128-GCM-SHA256 bits=128 verify=NOT) for ; Mon, 9 Jan 2017 01:25:41 -0500 Received: by mail-qk0-f199.google.com with SMTP id d75so52975195qkc.0 for ; Sun, 08 Jan 2017 22:25:41 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=o9kwvAhK/55Ebidna7vjgevhaQVg/d74HviugU/HtKo=; b=enJrmiaMxAmzZnGVhQyybsN4VjOD+sZlx1JzlbayorQIUFZ3JrKrdhGCVLg+7BpSXO 1kauiBbl5A5rhyAwApqGxjjSDHJO7bFA2GeAXiqxWBZHI/3z3UOs3sKkAvIaWIc7hXgA 4ltByLGJAZ7ae/8g4IrHPSFWZ/yeg27j9k1nALo4DBMbg94453K+/zyKShYqqtSt3Drl FQfjcGfSRZgbubEqgb7TeLTj7NPmHqcf20gs6LeGU9LpPMZ68mDuoijJ1daKh7GmDOuw /Wl1Rat4SPZDMuJJTOr3yHWh7+trXTY88gWm5lk5KScexo54M8ybk2YK1KiYlsYNnfS8 /efg== X-Gm-Message-State: AIkVDXLqyRZbLXcBnB83rt5t+/QeHO/pZYy/BpOjy1wpuskaPW2deKuqMNKyVuSw6o7sRzRQw03njTTDyHLrHlUfP8mwlByqN8A/ArVrYD2UgZdtA859hPXTGY62HsG2To1Ghs++tBw1R/oVPO0cNB3/58g= X-Received: by 10.55.107.4 with SMTP id g4mr51222174qkc.75.1483943141262; Sun, 08 Jan 2017 22:25:41 -0800 (PST) X-Received: by 10.55.107.4 with SMTP id g4mr51222146qkc.75.1483943141112; Sun, 08 Jan 2017 22:25:41 -0800 (PST) Received: from jintack.cs.columbia.edu ([2001:18d8:ffff:16:21a:4aff:feaa:f900]) by smtp.gmail.com with ESMTPSA id h3sm8623257qtc.6.2017.01.08.22.25.39 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Sun, 08 Jan 2017 22:25:40 -0800 (PST) From: Jintack Lim To: christoffer.dall@linaro.org, marc.zyngier@arm.com, pbonzini@redhat.com, rkrcmar@redhat.com, linux@armlinux.org.uk, catalin.marinas@arm.com, will.deacon@arm.com, vladimir.murzin@arm.com, suzuki.poulose@arm.com, mark.rutland@arm.com, james.morse@arm.com, lorenzo.pieralisi@arm.com, kevin.brodsky@arm.com, wcohen@redhat.com, shankerd@codeaurora.org, geoff@infradead.org, andre.przywara@arm.com, eric.auger@redhat.com, anna-maria@linutronix.de, shihwei@cs.columbia.edu, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, linux-kernel@vger.kernel.org Cc: jintack@cs.columbia.edu Subject: [RFC 08/55] KVM: arm64: Set virtual EL2 context depending on the guest exception level Date: Mon, 9 Jan 2017 01:24:04 -0500 Message-Id: <1483943091-1364-9-git-send-email-jintack@cs.columbia.edu> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1483943091-1364-1-git-send-email-jintack@cs.columbia.edu> References: <1483943091-1364-1-git-send-email-jintack@cs.columbia.edu> X-No-Spam-Score: Local X-Scanned-By: MIMEDefang 2.78 on 128.59.72.15 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Christoffer Dall Set up virutal EL2 context to hardware if the guest exception level is EL2. Signed-off-by: Christoffer Dall Signed-off-by: Jintack Lim --- arch/arm64/kvm/context.c | 32 ++++++++++++++++++++++++++------ 1 file changed, 26 insertions(+), 6 deletions(-) -- 1.9.1 diff --git a/arch/arm64/kvm/context.c b/arch/arm64/kvm/context.c index 320afc6..acb4b1e 100644 --- a/arch/arm64/kvm/context.c +++ b/arch/arm64/kvm/context.c @@ -25,10 +25,25 @@ void kvm_arm_setup_shadow_state(struct kvm_vcpu *vcpu) { struct kvm_cpu_context *ctxt = &vcpu->arch.ctxt; + if (unlikely(vcpu_mode_el2(vcpu))) { + ctxt->hw_pstate = *vcpu_cpsr(vcpu) & ~PSR_MODE_MASK; - ctxt->hw_pstate = *vcpu_cpsr(vcpu); - ctxt->hw_sys_regs = ctxt->sys_regs; - ctxt->hw_sp_el1 = ctxt->gp_regs.sp_el1; + /* + * We emulate virtual EL2 mode in hardware EL1 mode using the + * same stack pointer mode as the guest expects. + */ + if ((*vcpu_cpsr(vcpu) & PSR_MODE_MASK) == PSR_MODE_EL2h) + ctxt->hw_pstate |= PSR_MODE_EL1h; + else + ctxt->hw_pstate |= PSR_MODE_EL1t; + + ctxt->hw_sys_regs = ctxt->shadow_sys_regs; + ctxt->hw_sp_el1 = ctxt->el2_regs[SP_EL2]; + } else { + ctxt->hw_pstate = *vcpu_cpsr(vcpu); + ctxt->hw_sys_regs = ctxt->sys_regs; + ctxt->hw_sp_el1 = ctxt->gp_regs.sp_el1; + } } /** @@ -38,9 +53,14 @@ void kvm_arm_setup_shadow_state(struct kvm_vcpu *vcpu) void kvm_arm_restore_shadow_state(struct kvm_vcpu *vcpu) { struct kvm_cpu_context *ctxt = &vcpu->arch.ctxt; - - *vcpu_cpsr(vcpu) = ctxt->hw_pstate; - ctxt->gp_regs.sp_el1 = ctxt->hw_sp_el1; + if (unlikely(vcpu_mode_el2(vcpu))) { + *vcpu_cpsr(vcpu) &= PSR_MODE_MASK; + *vcpu_cpsr(vcpu) |= ctxt->hw_pstate & ~PSR_MODE_MASK; + ctxt->el2_regs[SP_EL2] = ctxt->hw_sp_el1; + } else { + *vcpu_cpsr(vcpu) = ctxt->hw_pstate; + ctxt->gp_regs.sp_el1 = ctxt->hw_sp_el1; + } } void kvm_arm_init_cpu_context(kvm_cpu_context_t *cpu_ctxt)