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 8812CC77B75 for ; Mon, 15 May 2023 17:47:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=5Dr5Ssd2R33aqSVa98mNDrQombm5Pz0UZQr/KKnY+/A=; b=Net3MDW5NkNY3f ZV+VOuWWizU+OUZeeMwBRha2ifNbEyoyhxvq/qBswYl2OFnZXA8un6bXs7Qg6Qd+vnuMQ5mCDcY7R 25mvOanJRU0lqLSazzT51ci8I+v2Dp83NDxorDzmx4f9G/K2i9RHUEwDr45jJgd26UM8KO0vlwed7 ZCYusixdEkwX7LSbYc6Nmzjoz1nYVSi8xLkmpgXFjz8UddKzRMHOoAzc+WcwZea91n9UpCoExa547 J7vFjui2CpGRq2xrfB3OTvnI2LxmJvFxu95XwdVov1bnhKRXsmiqLWV6MECFRtZRe+NXY1JNlWvwd R44HI+tNNAAKXCXyb1KQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1pycHh-002znf-2w; Mon, 15 May 2023 17:46:57 +0000 Received: from dfw.source.kernel.org ([139.178.84.217]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1pycHe-002zm1-2s for linux-arm-kernel@lists.infradead.org; Mon, 15 May 2023 17:46:56 +0000 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 6F46562EFE; Mon, 15 May 2023 17:46:54 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D1162C433D2; Mon, 15 May 2023 17:46:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1684172813; bh=psrHzuctoY4A00LSQJnXXY7988BD9rN0ECYit6Zxphc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=mQSiSyh0YzweA7D4m+8zi9oMj7TRTDJkUxtZ0vaKzRX+s2aDt31qjIvxPRZgLhF2D 3mceAGB8h10A5S56fbz5SQLXwmeWOrYCvvsWn54BZI+k2Y/Oa1n59BoE8W/GW01/m0 Klqk9m3mwye5TmSMG/W4hJVleDff9VSKNZca2O3zYe6jHZcsSAPirY+aEj965hafsQ UZ05PgeNr7dg+uCZPsZdqROxaPeGy997XIAJBJYkJ3YiIN2If7yGm4/8l28aL1g6kt cMTMqQGCUOjCReffUDFjVQy2rPOiZhindEyqaNLZcpgBFVD8Y5wkroebku/xvgxheM QV/ftQB0gcl2A== Received: from sofa.misterjones.org ([185.219.108.64] helo=valley-girl.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1pyc2h-00FJAF-0B; Mon, 15 May 2023 18:31:27 +0100 From: Marc Zyngier To: kvmarm@lists.linux.dev, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Alexandru Elisei , Andre Przywara , Chase Conklin , Christoffer Dall , Ganapatrao Kulkarni , Darren Hart , Jintack Lim , Russell King , Miguel Luis , James Morse , Suzuki K Poulose , Oliver Upton , Zenghui Yu Subject: [PATCH v10 14/59] KVM: arm64: nv: Add non-VHE-EL2->EL1 translation helpers Date: Mon, 15 May 2023 18:30:18 +0100 Message-Id: <20230515173103.1017669-15-maz@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230515173103.1017669-1-maz@kernel.org> References: <20230515173103.1017669-1-maz@kernel.org> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: kvmarm@lists.linux.dev, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, alexandru.elisei@arm.com, andre.przywara@arm.com, chase.conklin@arm.com, christoffer.dall@arm.com, gankulkarni@os.amperecomputing.com, darren@os.amperecomputing.com, jintack@cs.columbia.edu, rmk+kernel@armlinux.org.uk, miguel.luis@oracle.com, james.morse@arm.com, suzuki.poulose@arm.com, oliver.upton@linux.dev, yuzenghui@huawei.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-20230515_104655_003745_7626F1AC X-CRM114-Status: GOOD ( 15.67 ) 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 Some EL2 system registers immediately affect the current execution of the system, so we need to use their respective EL1 counterparts. For this we need to define a mapping between the two. In general, this only affects non-VHE guest hypervisors, as VHE system registers are compatible with the EL1 counterparts. These helpers will get used in subsequent patches. Co-developed-by: Andre Przywara Signed-off-by: Andre Przywara Signed-off-by: Marc Zyngier --- arch/arm64/include/asm/kvm_nested.h | 48 +++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) diff --git a/arch/arm64/include/asm/kvm_nested.h b/arch/arm64/include/asm/kvm_nested.h index fa23cc9c2adc..9099df57037d 100644 --- a/arch/arm64/include/asm/kvm_nested.h +++ b/arch/arm64/include/asm/kvm_nested.h @@ -2,6 +2,7 @@ #ifndef __ARM64_KVM_NESTED_H #define __ARM64_KVM_NESTED_H +#include #include static inline bool vcpu_has_nv(const struct kvm_vcpu *vcpu) @@ -11,6 +12,53 @@ static inline bool vcpu_has_nv(const struct kvm_vcpu *vcpu) test_bit(KVM_ARM_VCPU_HAS_EL2, vcpu->arch.features)); } +/* Translation helpers from non-VHE EL2 to EL1 */ +static inline u64 tcr_el2_ps_to_tcr_el1_ips(u64 tcr_el2) +{ + return (u64)FIELD_GET(TCR_EL2_PS_MASK, tcr_el2) << TCR_IPS_SHIFT; +} + +static inline u64 translate_tcr_el2_to_tcr_el1(u64 tcr) +{ + return TCR_EPD1_MASK | /* disable TTBR1_EL1 */ + ((tcr & TCR_EL2_TBI) ? TCR_TBI0 : 0) | + tcr_el2_ps_to_tcr_el1_ips(tcr) | + (tcr & TCR_EL2_TG0_MASK) | + (tcr & TCR_EL2_ORGN0_MASK) | + (tcr & TCR_EL2_IRGN0_MASK) | + (tcr & TCR_EL2_T0SZ_MASK); +} + +static inline u64 translate_cptr_el2_to_cpacr_el1(u64 cptr_el2) +{ + u64 cpacr_el1 = 0; + + if (cptr_el2 & CPTR_EL2_TTA) + cpacr_el1 |= CPACR_ELx_TTA; + if (!(cptr_el2 & CPTR_EL2_TFP)) + cpacr_el1 |= CPACR_ELx_FPEN; + if (!(cptr_el2 & CPTR_EL2_TZ)) + cpacr_el1 |= CPACR_ELx_ZEN; + + return cpacr_el1; +} + +static inline u64 translate_sctlr_el2_to_sctlr_el1(u64 val) +{ + /* Only preserve the minimal set of bits we support */ + val &= (SCTLR_ELx_M | SCTLR_ELx_A | SCTLR_ELx_C | SCTLR_ELx_SA | + SCTLR_ELx_I | SCTLR_ELx_IESB | SCTLR_ELx_WXN | SCTLR_ELx_EE); + val |= SCTLR_EL1_RES1; + + return val; +} + +static inline u64 translate_ttbr0_el2_to_ttbr0_el1(u64 ttbr0) +{ + /* Clear the ASID field */ + return ttbr0 & ~GENMASK_ULL(63, 48); +} + extern bool __check_nv_sr_forward(struct kvm_vcpu *vcpu); struct sys_reg_params; -- 2.34.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel