From patchwork Fri Jun 21 09:38:03 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marc Zyngier X-Patchwork-Id: 11009535 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 DED7E1580 for ; Fri, 21 Jun 2019 10:01:09 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id CC296289EC for ; Fri, 21 Jun 2019 10:01:09 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C05B0289F3; Fri, 21 Jun 2019 10:01:09 +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=unavailable 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 6EA99289EC for ; Fri, 21 Jun 2019 10:01:09 +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: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=/ZAB9u8QNUsfCSBDeS3+WbJfaUZhZ2LdBo/Mu/PqfXc=; b=eNepQFnWTVZ1S1 JEt2QGV0L7evoQmdSQdP9VfI1WX8ntJxifefRnHa+XhZTO4YSqR4NUzcqML+kw2uxSqO5DIP0plY/ 4jIsdvJWMXoBpEpx7DJDQo42UDMhxY4NPxMz9pcfH64G2QUnXS7GCwyClTOKU2kQdT+I5h7CV2Rgv c9mQ4Dv9ns6FpGhkvMqfARobUXz2cmbUfUWSADa2PuVMJZrVTFXG5pp0fuJHLdbkWw0rgJ+cxGZbI NE6E9ACJqrRyGHAuoKDilkQ2gHzrsCf/YeDDpx/1eDI6M5IX4ST5RTY9bbEGLgVnMcqESwfD2mCKF WWv0CojC/ZLX0fPFY61A==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1heGLv-00041L-Ry; Fri, 21 Jun 2019 10:01:03 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1heG1G-0007Gm-MB for linux-arm-kernel@lists.infradead.org; Fri, 21 Jun 2019 09:39:44 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 54252142F; Fri, 21 Jun 2019 02:39:42 -0700 (PDT) Received: from filthy-habits.cambridge.arm.com (filthy-habits.cambridge.arm.com [10.1.197.61]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id F3ADA3F246; Fri, 21 Jun 2019 02:39:40 -0700 (PDT) From: Marc Zyngier To: linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org Subject: [PATCH 19/59] KVM: arm64: nv: Trap SPSR_EL1, ELR_EL1 and VBAR_EL1 from virtual EL2 Date: Fri, 21 Jun 2019 10:38:03 +0100 Message-Id: <20190621093843.220980-20-marc.zyngier@arm.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190621093843.220980-1-marc.zyngier@arm.com> References: <20190621093843.220980-1-marc.zyngier@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190621_023942_912042_4D24D284 X-CRM114-Status: GOOD ( 11.28 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Julien Thierry , Andre Przywara , Suzuki K Poulose , Christoffer Dall , Dave Martin , James Morse , Jintack Lim 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 From: Jintack Lim For the same reason we trap virtual memory register accesses at virtual EL2, we need to trap SPSR_EL1, ELR_EL1 and VBAR_EL1 accesses. ARM v8.3 introduces the HCR_EL2.NV1 bit to be able to trap on those register accesses in EL1. Do not set this bit until the whole nesting support is completed. Signed-off-by: Jintack Lim Signed-off-by: Marc Zyngier --- arch/arm64/kvm/sys_regs.c | 29 ++++++++++++++++++++++++++++- 1 file changed, 28 insertions(+), 1 deletion(-) diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index 0464d8e29cba..7fc87657382d 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -1606,6 +1606,30 @@ static bool access_sp_el1(struct kvm_vcpu *vcpu, return true; } +static bool access_elr(struct kvm_vcpu *vcpu, + struct sys_reg_params *p, + const struct sys_reg_desc *r) +{ + if (p->is_write) + vcpu->arch.ctxt.gp_regs.elr_el1 = p->regval; + else + p->regval = vcpu->arch.ctxt.gp_regs.elr_el1; + + return true; +} + +static bool access_spsr(struct kvm_vcpu *vcpu, + struct sys_reg_params *p, + const struct sys_reg_desc *r) +{ + if (p->is_write) + vcpu->arch.ctxt.gp_regs.spsr[KVM_SPSR_EL1] = p->regval; + else + p->regval = vcpu->arch.ctxt.gp_regs.spsr[KVM_SPSR_EL1]; + + return true; +} + static bool access_spsr_el2(struct kvm_vcpu *vcpu, struct sys_reg_params *p, const struct sys_reg_desc *r) @@ -1761,6 +1785,9 @@ static const struct sys_reg_desc sys_reg_descs[] = { PTRAUTH_KEY(APDB), PTRAUTH_KEY(APGA), + { SYS_DESC(SYS_SPSR_EL1), access_spsr}, + { SYS_DESC(SYS_ELR_EL1), access_elr}, + { SYS_DESC(SYS_AFSR0_EL1), access_vm_reg, reset_unknown, AFSR0_EL1 }, { SYS_DESC(SYS_AFSR1_EL1), access_vm_reg, reset_unknown, AFSR1_EL1 }, { SYS_DESC(SYS_ESR_EL1), access_vm_reg, reset_unknown, ESR_EL1 }, @@ -1789,7 +1816,7 @@ static const struct sys_reg_desc sys_reg_descs[] = { { SYS_DESC(SYS_LORC_EL1), trap_loregion }, { SYS_DESC(SYS_LORID_EL1), trap_loregion }, - { SYS_DESC(SYS_VBAR_EL1), NULL, reset_val, VBAR_EL1, 0 }, + { SYS_DESC(SYS_VBAR_EL1), access_rw, reset_val, VBAR_EL1, 0 }, { SYS_DESC(SYS_DISR_EL1), NULL, reset_val, DISR_EL1, 0 }, { SYS_DESC(SYS_ICC_IAR0_EL1), write_to_read_only },