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 7FA83C636D7 for ; Thu, 9 Feb 2023 18:02:26 +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=pMCv+Hfe/Iz35RI6/4ne5H8XS5vJs9IdpJeN8k6xIyc=; b=dKzBU45o5jetuN 0nE4CnfAzpBScvPyJlf8IttU/ZYdNRd5BBFcrQWwtYNVIYa7gC/QyrwIWVWiE0jgLn2YeWTNOAYCI MRqJgIyjWZ6F8GwEDx5qWykhBMdWxKdOypAj3AAP9AgZdYY0C7NJsd0BzkZF0mlYWSa8Bwp9UAHwL 2T9ZMCjlF8mGZvU13KTDEXda5MomTZzEm22tAi6fpUtMAEMjPGwtKzxErDHHMYg0H1tarDnzdvsbZ bOvhxaKYShaBlBEXqaIqmc3XsNg/rhL2iDKmZyTkqV8BF72lgImAUlb+ITA74+S7fk3EQwwIeFZFF MaxXocvuSTPJxe29uFzA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1pQBE5-002fZ4-K5; Thu, 09 Feb 2023 18:00:53 +0000 Received: from ams.source.kernel.org ([145.40.68.75]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1pQBCB-002ech-3g for linux-arm-kernel@lists.infradead.org; Thu, 09 Feb 2023 17:58:56 +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 ams.source.kernel.org (Postfix) with ESMTPS id C3490B82288; Thu, 9 Feb 2023 17:58:50 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6690CC433A8; Thu, 9 Feb 2023 17:58:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1675965529; bh=bDxJtBbv3EPtICbhn9EntHIP/DYyRvi5Hb9bcUYfVhk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ALgXvNLEKbyFx1ns99W6jqFDBYAitcEL0d40uD+KR+73Kk0yN1YknZk9CHDyRVi0N 8CpCWw7D+obNO34m4UWCayfZls1CMoqYrc2XQ68Ydg3AZiO2bArclNYzmfCIIqyY7S KlHe1SPyxj0tiVn5LZf8TwHPhk0VzZhdi4kVN6zWStx1dWBiGTPNdfBYp8q22Qusko pCYerEswdcbBQWm2XYoVJgKWWzDw90n4L/N8nS9uFXJDlMtuBK6Nt0iCNuoqomhAg2 aUmWOATOW9k7fqbbvPru+HSj6kThjiDhSKsHJbZEzyLHD4zRX7avOdRILtm30sxd1Z OwvcdrBwLhcnw== 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 1pQBC3-0093r7-Ej; Thu, 09 Feb 2023 17:58:47 +0000 From: Marc Zyngier To: kvmarm@lists.linux.dev, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Alexandru Elisei , Andre Przywara , Catalin Marinas , Christoffer Dall , Ganapatrao Kulkarni , Russell King , James Morse , Suzuki K Poulose , Oliver Upton , Zenghui Yu Subject: [PATCH 07/18] KVM: arm64: nv: Add nested virt VCPU primitives for vEL2 VCPU state Date: Thu, 9 Feb 2023 17:58:09 +0000 Message-Id: <20230209175820.1939006-8-maz@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230209175820.1939006-1-maz@kernel.org> References: <20230209175820.1939006-1-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, catalin.marinas@arm.com, christoffer.dall@arm.com, gankulkarni@os.amperecomputing.com, rmk+kernel@armlinux.org.uk, 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-20230209_095855_507149_E60037D0 X-CRM114-Status: GOOD ( 15.38 ) 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: Christoffer Dall When running a nested hypervisor we commonly have to figure out if the VCPU mode is running in the context of a guest hypervisor or guest guest, or just a normal guest. Add convenient primitives for this. Reviewed-by: Russell King (Oracle) Signed-off-by: Christoffer Dall Signed-off-by: Marc Zyngier --- arch/arm64/include/asm/kvm_emulate.h | 56 ++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) diff --git a/arch/arm64/include/asm/kvm_emulate.h b/arch/arm64/include/asm/kvm_emulate.h index 193583df2d9c..e5d826dc0b63 100644 --- a/arch/arm64/include/asm/kvm_emulate.h +++ b/arch/arm64/include/asm/kvm_emulate.h @@ -183,6 +183,62 @@ static __always_inline void vcpu_set_reg(struct kvm_vcpu *vcpu, u8 reg_num, vcpu_gp_regs(vcpu)->regs[reg_num] = val; } +static inline bool vcpu_is_el2_ctxt(const struct kvm_cpu_context *ctxt) +{ + switch (ctxt->regs.pstate & (PSR_MODE32_BIT | PSR_MODE_MASK)) { + case PSR_MODE_EL2h: + case PSR_MODE_EL2t: + return true; + default: + return false; + } +} + +static inline bool vcpu_is_el2(const struct kvm_vcpu *vcpu) +{ + return vcpu_is_el2_ctxt(&vcpu->arch.ctxt); +} + +static inline bool __vcpu_el2_e2h_is_set(const struct kvm_cpu_context *ctxt) +{ + return ctxt_sys_reg(ctxt, HCR_EL2) & HCR_E2H; +} + +static inline bool vcpu_el2_e2h_is_set(const struct kvm_vcpu *vcpu) +{ + return __vcpu_el2_e2h_is_set(&vcpu->arch.ctxt); +} + +static inline bool __vcpu_el2_tge_is_set(const struct kvm_cpu_context *ctxt) +{ + return ctxt_sys_reg(ctxt, HCR_EL2) & HCR_TGE; +} + +static inline bool vcpu_el2_tge_is_set(const struct kvm_vcpu *vcpu) +{ + return __vcpu_el2_tge_is_set(&vcpu->arch.ctxt); +} + +static inline bool __is_hyp_ctxt(const struct kvm_cpu_context *ctxt) +{ + /* + * We are in a hypervisor context if the vcpu mode is EL2 or + * E2H and TGE bits are set. The latter means we are in the user space + * of the VHE kernel. ARMv8.1 ARM describes this as 'InHost' + * + * Note that the HCR_EL2.{E2H,TGE}={0,1} isn't really handled in the + * rest of the KVM code, and will result in a misbehaving guest. + */ + return vcpu_is_el2_ctxt(ctxt) || + (__vcpu_el2_e2h_is_set(ctxt) && __vcpu_el2_tge_is_set(ctxt)) || + __vcpu_el2_tge_is_set(ctxt); +} + +static inline bool is_hyp_ctxt(const struct kvm_vcpu *vcpu) +{ + return __is_hyp_ctxt(&vcpu->arch.ctxt); +} + /* * The layout of SPSR for an AArch32 state is different when observed from an * AArch64 SPSR_ELx or an AArch32 SPSR_*. This function generates the AArch32 -- 2.34.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel