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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id F2B5CC433EF for ; Fri, 28 Jan 2022 12:19:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1348432AbiA1MTw (ORCPT ); Fri, 28 Jan 2022 07:19:52 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40316 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1348409AbiA1MTq (ORCPT ); Fri, 28 Jan 2022 07:19:46 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 87E69C061714 for ; Fri, 28 Jan 2022 04:19:46 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 279E661AF8 for ; Fri, 28 Jan 2022 12:19:46 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 92028C340E6; Fri, 28 Jan 2022 12:19:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1643372385; bh=1TKpt2fZ4/6VrKO+E6RHrsdqW5r4GqGnD3k4R554Sgw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hoLHbvFerJqDS1noBK61ur8goVD5giqfaDpTf+It3pn3Rq0S1GTAAhVi46jWaoc7f M6/ZKdxPMZMo6XVVSPWEDxj1w+OMIVhipnUIkrtjyC9ZjsgPEPzS34RZGmiWLLJkCG kX4zXD6GQHeY9Dmp1ffVdW0OBI3T+py7PYCIOv1P86jRgoYOC548vnTTk6o7wDpOQq n2F34rOx5vpJY4cia8KR2T8uMmeYiZjLvPA4c0xCzvO3AAHW0aMDP0iAj7yqRCoyzp AFO3ZiknbwALOHTWLfGfv/Uy2iNKkzO3c/GFct0HATApcFQBAHvU6wzToUHFCwL8Yv Y+zpRAZskCnKA== Received: from sofa.misterjones.org ([185.219.108.64] helo=why.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1nDQE5-003njR-PJ; Fri, 28 Jan 2022 12:19:37 +0000 From: Marc Zyngier To: linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org Cc: Andre Przywara , Christoffer Dall , Jintack Lim , Haibo Xu , Ganapatrao Kulkarni , Chase Conklin , "Russell King (Oracle)" , James Morse , Suzuki K Poulose , Alexandru Elisei , karl.heubaum@oracle.com, mihai.carabas@oracle.com, miguel.luis@oracle.com, kernel-team@android.com Subject: [PATCH v6 26/64] KVM: arm64: nv: Respect the virtual HCR_EL2.NV1 bit setting Date: Fri, 28 Jan 2022 12:18:34 +0000 Message-Id: <20220128121912.509006-27-maz@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220128121912.509006-1-maz@kernel.org> References: <20220128121912.509006-1-maz@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SA-Exim-Connect-IP: 185.219.108.64 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, jintack@cs.columbia.edu, haibo.xu@linaro.org, gankulkarni@os.amperecomputing.com, chase.conklin@arm.com, linux@armlinux.org.uk, james.morse@arm.com, suzuki.poulose@arm.com, alexandru.elisei@arm.com, karl.heubaum@oracle.com, mihai.carabas@oracle.com, miguel.luis@oracle.com, kernel-team@android.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org From: Jintack Lim Forward ELR_EL1, SPSR_EL1 and VBAR_EL1 traps to the virtual EL2 if the virtual HCR_EL2.NV bit is set. This is for recursive nested virtualization. Signed-off-by: Jintack Lim Signed-off-by: Marc Zyngier --- arch/arm64/include/asm/kvm_arm.h | 1 + arch/arm64/include/asm/kvm_nested.h | 1 + arch/arm64/kvm/emulate-nested.c | 5 +++++ arch/arm64/kvm/sys_regs.c | 22 +++++++++++++++++++++- 4 files changed, 28 insertions(+), 1 deletion(-) diff --git a/arch/arm64/include/asm/kvm_arm.h b/arch/arm64/include/asm/kvm_arm.h index 8043827e7dc0..748c2b068d4e 100644 --- a/arch/arm64/include/asm/kvm_arm.h +++ b/arch/arm64/include/asm/kvm_arm.h @@ -20,6 +20,7 @@ #define HCR_AMVOFFEN (UL(1) << 51) #define HCR_FIEN (UL(1) << 47) #define HCR_FWB (UL(1) << 46) +#define HCR_NV1 (UL(1) << 43) #define HCR_NV (UL(1) << 42) #define HCR_API (UL(1) << 41) #define HCR_APK (UL(1) << 40) diff --git a/arch/arm64/include/asm/kvm_nested.h b/arch/arm64/include/asm/kvm_nested.h index 37ff6458296d..82fc8b6c990b 100644 --- a/arch/arm64/include/asm/kvm_nested.h +++ b/arch/arm64/include/asm/kvm_nested.h @@ -68,5 +68,6 @@ static inline u64 translate_cnthctl_el2_to_cntkctl_el1(u64 cnthctl) int handle_wfx_nested(struct kvm_vcpu *vcpu, bool is_wfe); extern bool forward_traps(struct kvm_vcpu *vcpu, u64 control_bit); extern bool forward_nv_traps(struct kvm_vcpu *vcpu); +extern bool forward_nv1_traps(struct kvm_vcpu *vcpu); #endif /* __ARM64_KVM_NESTED_H */ diff --git a/arch/arm64/kvm/emulate-nested.c b/arch/arm64/kvm/emulate-nested.c index 7dd98d6e96e0..0109dfd664dd 100644 --- a/arch/arm64/kvm/emulate-nested.c +++ b/arch/arm64/kvm/emulate-nested.c @@ -33,6 +33,11 @@ bool forward_nv_traps(struct kvm_vcpu *vcpu) return forward_traps(vcpu, HCR_NV); } +bool forward_nv1_traps(struct kvm_vcpu *vcpu) +{ + return forward_traps(vcpu, HCR_NV1); +} + static u64 kvm_check_illegal_exception_return(struct kvm_vcpu *vcpu, u64 spsr) { u64 mode = spsr & PSR_MODE_MASK; diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index edaf287c7ec9..31d739d59f67 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -288,6 +288,16 @@ static bool access_rw(struct kvm_vcpu *vcpu, return true; } +static bool access_vbar_el1(struct kvm_vcpu *vcpu, + struct sys_reg_params *p, + const struct sys_reg_desc *r) +{ + if (forward_nv1_traps(vcpu)) + return false; + + return access_rw(vcpu, p, r); +} + /* * See note at ARMv7 ARM B1.14.4 (TL;DR: S/W ops are not easily virtualized). */ @@ -1669,6 +1679,7 @@ 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) @@ -1676,6 +1687,9 @@ static bool access_elr(struct kvm_vcpu *vcpu, if (el12_reg(p) && forward_nv_traps(vcpu)) return false; + if (!el12_reg(p) && forward_nv1_traps(vcpu)) + return false; + if (p->is_write) vcpu_write_sys_reg(vcpu, p->regval, ELR_EL1); else @@ -1691,6 +1705,9 @@ static bool access_spsr(struct kvm_vcpu *vcpu, if (el12_reg(p) && forward_nv_traps(vcpu)) return false; + if (!el12_reg(p) && forward_nv1_traps(vcpu)) + return false; + if (p->is_write) __vcpu_sys_reg(vcpu, SPSR_EL1) = p->regval; else @@ -1706,6 +1723,9 @@ static bool access_spsr_el2(struct kvm_vcpu *vcpu, if (el12_reg(p) && forward_nv_traps(vcpu)) return false; + if (!el12_reg(p) && forward_nv1_traps(vcpu)) + return false; + if (p->is_write) vcpu_write_sys_reg(vcpu, p->regval, SPSR_EL2); else @@ -1914,7 +1934,7 @@ 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), access_rw, reset_val, VBAR_EL1, 0 }, + { SYS_DESC(SYS_VBAR_EL1), access_vbar_el1, 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 }, -- 2.30.2 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 Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4DD2AC433FE for ; Fri, 28 Jan 2022 12:19:53 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id F26204B0DF; Fri, 28 Jan 2022 07:19:52 -0500 (EST) X-Virus-Scanned: at lists.cs.columbia.edu Authentication-Results: mm01.cs.columbia.edu (amavisd-new); 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Fri, 28 Jan 2022 12:19:46 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 92028C340E6; Fri, 28 Jan 2022 12:19:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1643372385; bh=1TKpt2fZ4/6VrKO+E6RHrsdqW5r4GqGnD3k4R554Sgw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hoLHbvFerJqDS1noBK61ur8goVD5giqfaDpTf+It3pn3Rq0S1GTAAhVi46jWaoc7f M6/ZKdxPMZMo6XVVSPWEDxj1w+OMIVhipnUIkrtjyC9ZjsgPEPzS34RZGmiWLLJkCG kX4zXD6GQHeY9Dmp1ffVdW0OBI3T+py7PYCIOv1P86jRgoYOC548vnTTk6o7wDpOQq n2F34rOx5vpJY4cia8KR2T8uMmeYiZjLvPA4c0xCzvO3AAHW0aMDP0iAj7yqRCoyzp AFO3ZiknbwALOHTWLfGfv/Uy2iNKkzO3c/GFct0HATApcFQBAHvU6wzToUHFCwL8Yv Y+zpRAZskCnKA== Received: from sofa.misterjones.org ([185.219.108.64] helo=why.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1nDQE5-003njR-PJ; Fri, 28 Jan 2022 12:19:37 +0000 From: Marc Zyngier To: linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org Subject: [PATCH v6 26/64] KVM: arm64: nv: Respect the virtual HCR_EL2.NV1 bit setting Date: Fri, 28 Jan 2022 12:18:34 +0000 Message-Id: <20220128121912.509006-27-maz@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220128121912.509006-1-maz@kernel.org> References: <20220128121912.509006-1-maz@kernel.org> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 185.219.108.64 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, jintack@cs.columbia.edu, haibo.xu@linaro.org, gankulkarni@os.amperecomputing.com, chase.conklin@arm.com, linux@armlinux.org.uk, james.morse@arm.com, suzuki.poulose@arm.com, alexandru.elisei@arm.com, karl.heubaum@oracle.com, mihai.carabas@oracle.com, miguel.luis@oracle.com, kernel-team@android.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false Cc: kernel-team@android.com, Andre Przywara , Christoffer Dall , Chase Conklin , "Russell King \(Oracle\)" , mihai.carabas@oracle.com, Ganapatrao Kulkarni X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu From: Jintack Lim Forward ELR_EL1, SPSR_EL1 and VBAR_EL1 traps to the virtual EL2 if the virtual HCR_EL2.NV bit is set. This is for recursive nested virtualization. Signed-off-by: Jintack Lim Signed-off-by: Marc Zyngier --- arch/arm64/include/asm/kvm_arm.h | 1 + arch/arm64/include/asm/kvm_nested.h | 1 + arch/arm64/kvm/emulate-nested.c | 5 +++++ arch/arm64/kvm/sys_regs.c | 22 +++++++++++++++++++++- 4 files changed, 28 insertions(+), 1 deletion(-) diff --git a/arch/arm64/include/asm/kvm_arm.h b/arch/arm64/include/asm/kvm_arm.h index 8043827e7dc0..748c2b068d4e 100644 --- a/arch/arm64/include/asm/kvm_arm.h +++ b/arch/arm64/include/asm/kvm_arm.h @@ -20,6 +20,7 @@ #define HCR_AMVOFFEN (UL(1) << 51) #define HCR_FIEN (UL(1) << 47) #define HCR_FWB (UL(1) << 46) +#define HCR_NV1 (UL(1) << 43) #define HCR_NV (UL(1) << 42) #define HCR_API (UL(1) << 41) #define HCR_APK (UL(1) << 40) diff --git a/arch/arm64/include/asm/kvm_nested.h b/arch/arm64/include/asm/kvm_nested.h index 37ff6458296d..82fc8b6c990b 100644 --- a/arch/arm64/include/asm/kvm_nested.h +++ b/arch/arm64/include/asm/kvm_nested.h @@ -68,5 +68,6 @@ static inline u64 translate_cnthctl_el2_to_cntkctl_el1(u64 cnthctl) int handle_wfx_nested(struct kvm_vcpu *vcpu, bool is_wfe); extern bool forward_traps(struct kvm_vcpu *vcpu, u64 control_bit); extern bool forward_nv_traps(struct kvm_vcpu *vcpu); +extern bool forward_nv1_traps(struct kvm_vcpu *vcpu); #endif /* __ARM64_KVM_NESTED_H */ diff --git a/arch/arm64/kvm/emulate-nested.c b/arch/arm64/kvm/emulate-nested.c index 7dd98d6e96e0..0109dfd664dd 100644 --- a/arch/arm64/kvm/emulate-nested.c +++ b/arch/arm64/kvm/emulate-nested.c @@ -33,6 +33,11 @@ bool forward_nv_traps(struct kvm_vcpu *vcpu) return forward_traps(vcpu, HCR_NV); } +bool forward_nv1_traps(struct kvm_vcpu *vcpu) +{ + return forward_traps(vcpu, HCR_NV1); +} + static u64 kvm_check_illegal_exception_return(struct kvm_vcpu *vcpu, u64 spsr) { u64 mode = spsr & PSR_MODE_MASK; diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index edaf287c7ec9..31d739d59f67 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -288,6 +288,16 @@ static bool access_rw(struct kvm_vcpu *vcpu, return true; } +static bool access_vbar_el1(struct kvm_vcpu *vcpu, + struct sys_reg_params *p, + const struct sys_reg_desc *r) +{ + if (forward_nv1_traps(vcpu)) + return false; + + return access_rw(vcpu, p, r); +} + /* * See note at ARMv7 ARM B1.14.4 (TL;DR: S/W ops are not easily virtualized). */ @@ -1669,6 +1679,7 @@ 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) @@ -1676,6 +1687,9 @@ static bool access_elr(struct kvm_vcpu *vcpu, if (el12_reg(p) && forward_nv_traps(vcpu)) return false; + if (!el12_reg(p) && forward_nv1_traps(vcpu)) + return false; + if (p->is_write) vcpu_write_sys_reg(vcpu, p->regval, ELR_EL1); else @@ -1691,6 +1705,9 @@ static bool access_spsr(struct kvm_vcpu *vcpu, if (el12_reg(p) && forward_nv_traps(vcpu)) return false; + if (!el12_reg(p) && forward_nv1_traps(vcpu)) + return false; + if (p->is_write) __vcpu_sys_reg(vcpu, SPSR_EL1) = p->regval; else @@ -1706,6 +1723,9 @@ static bool access_spsr_el2(struct kvm_vcpu *vcpu, if (el12_reg(p) && forward_nv_traps(vcpu)) return false; + if (!el12_reg(p) && forward_nv1_traps(vcpu)) + return false; + if (p->is_write) vcpu_write_sys_reg(vcpu, p->regval, SPSR_EL2); else @@ -1914,7 +1934,7 @@ 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), access_rw, reset_val, VBAR_EL1, 0 }, + { SYS_DESC(SYS_VBAR_EL1), access_vbar_el1, 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 }, -- 2.30.2 _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm 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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 3DD3CC433EF for ; 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Fri, 28 Jan 2022 12:19:37 +0000 From: Marc Zyngier To: linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org Cc: Andre Przywara , Christoffer Dall , Jintack Lim , Haibo Xu , Ganapatrao Kulkarni , Chase Conklin , "Russell King (Oracle)" , James Morse , Suzuki K Poulose , Alexandru Elisei , karl.heubaum@oracle.com, mihai.carabas@oracle.com, miguel.luis@oracle.com, kernel-team@android.com Subject: [PATCH v6 26/64] KVM: arm64: nv: Respect the virtual HCR_EL2.NV1 bit setting Date: Fri, 28 Jan 2022 12:18:34 +0000 Message-Id: <20220128121912.509006-27-maz@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220128121912.509006-1-maz@kernel.org> References: <20220128121912.509006-1-maz@kernel.org> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 185.219.108.64 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, jintack@cs.columbia.edu, haibo.xu@linaro.org, gankulkarni@os.amperecomputing.com, chase.conklin@arm.com, linux@armlinux.org.uk, james.morse@arm.com, suzuki.poulose@arm.com, alexandru.elisei@arm.com, karl.heubaum@oracle.com, mihai.carabas@oracle.com, miguel.luis@oracle.com, kernel-team@android.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-20220128_041948_463437_AF4FF759 X-CRM114-Status: GOOD ( 16.18 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; 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 From: Jintack Lim Forward ELR_EL1, SPSR_EL1 and VBAR_EL1 traps to the virtual EL2 if the virtual HCR_EL2.NV bit is set. This is for recursive nested virtualization. Signed-off-by: Jintack Lim Signed-off-by: Marc Zyngier --- arch/arm64/include/asm/kvm_arm.h | 1 + arch/arm64/include/asm/kvm_nested.h | 1 + arch/arm64/kvm/emulate-nested.c | 5 +++++ arch/arm64/kvm/sys_regs.c | 22 +++++++++++++++++++++- 4 files changed, 28 insertions(+), 1 deletion(-) diff --git a/arch/arm64/include/asm/kvm_arm.h b/arch/arm64/include/asm/kvm_arm.h index 8043827e7dc0..748c2b068d4e 100644 --- a/arch/arm64/include/asm/kvm_arm.h +++ b/arch/arm64/include/asm/kvm_arm.h @@ -20,6 +20,7 @@ #define HCR_AMVOFFEN (UL(1) << 51) #define HCR_FIEN (UL(1) << 47) #define HCR_FWB (UL(1) << 46) +#define HCR_NV1 (UL(1) << 43) #define HCR_NV (UL(1) << 42) #define HCR_API (UL(1) << 41) #define HCR_APK (UL(1) << 40) diff --git a/arch/arm64/include/asm/kvm_nested.h b/arch/arm64/include/asm/kvm_nested.h index 37ff6458296d..82fc8b6c990b 100644 --- a/arch/arm64/include/asm/kvm_nested.h +++ b/arch/arm64/include/asm/kvm_nested.h @@ -68,5 +68,6 @@ static inline u64 translate_cnthctl_el2_to_cntkctl_el1(u64 cnthctl) int handle_wfx_nested(struct kvm_vcpu *vcpu, bool is_wfe); extern bool forward_traps(struct kvm_vcpu *vcpu, u64 control_bit); extern bool forward_nv_traps(struct kvm_vcpu *vcpu); +extern bool forward_nv1_traps(struct kvm_vcpu *vcpu); #endif /* __ARM64_KVM_NESTED_H */ diff --git a/arch/arm64/kvm/emulate-nested.c b/arch/arm64/kvm/emulate-nested.c index 7dd98d6e96e0..0109dfd664dd 100644 --- a/arch/arm64/kvm/emulate-nested.c +++ b/arch/arm64/kvm/emulate-nested.c @@ -33,6 +33,11 @@ bool forward_nv_traps(struct kvm_vcpu *vcpu) return forward_traps(vcpu, HCR_NV); } +bool forward_nv1_traps(struct kvm_vcpu *vcpu) +{ + return forward_traps(vcpu, HCR_NV1); +} + static u64 kvm_check_illegal_exception_return(struct kvm_vcpu *vcpu, u64 spsr) { u64 mode = spsr & PSR_MODE_MASK; diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index edaf287c7ec9..31d739d59f67 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -288,6 +288,16 @@ static bool access_rw(struct kvm_vcpu *vcpu, return true; } +static bool access_vbar_el1(struct kvm_vcpu *vcpu, + struct sys_reg_params *p, + const struct sys_reg_desc *r) +{ + if (forward_nv1_traps(vcpu)) + return false; + + return access_rw(vcpu, p, r); +} + /* * See note at ARMv7 ARM B1.14.4 (TL;DR: S/W ops are not easily virtualized). */ @@ -1669,6 +1679,7 @@ 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) @@ -1676,6 +1687,9 @@ static bool access_elr(struct kvm_vcpu *vcpu, if (el12_reg(p) && forward_nv_traps(vcpu)) return false; + if (!el12_reg(p) && forward_nv1_traps(vcpu)) + return false; + if (p->is_write) vcpu_write_sys_reg(vcpu, p->regval, ELR_EL1); else @@ -1691,6 +1705,9 @@ static bool access_spsr(struct kvm_vcpu *vcpu, if (el12_reg(p) && forward_nv_traps(vcpu)) return false; + if (!el12_reg(p) && forward_nv1_traps(vcpu)) + return false; + if (p->is_write) __vcpu_sys_reg(vcpu, SPSR_EL1) = p->regval; else @@ -1706,6 +1723,9 @@ static bool access_spsr_el2(struct kvm_vcpu *vcpu, if (el12_reg(p) && forward_nv_traps(vcpu)) return false; + if (!el12_reg(p) && forward_nv1_traps(vcpu)) + return false; + if (p->is_write) vcpu_write_sys_reg(vcpu, p->regval, SPSR_EL2); else @@ -1914,7 +1934,7 @@ 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), access_rw, reset_val, VBAR_EL1, 0 }, + { SYS_DESC(SYS_VBAR_EL1), access_vbar_el1, 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 }, -- 2.30.2 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel