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 5F067C433EF for ; Mon, 29 Nov 2021 21:00:09 +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=rnUPc8Ac5nKCq+VTGZl+00vEx1LFS993n8J83n45gVg=; b=E4dRWFzOg0z5/c j5toWoLtHYHoRXaepfm9w0SZddTf91QHAwwt7EVOaLr7DIvmn1n4fYMvp1ETMrk/EnkgGKc5D5qz+ iTbikxF0D7N1uEtKSKOfyp3aCsB0h1yK7KKlncAZ2nUayexw5weNGQj8k+31Y8Jbb+KsZAeIFBHYB BpXzvL4LCDR7rY5hWNnW6rIDAfb5dmr+PAuvx5MnJfm491xhp/hn4VFwJ5Wl6/Y1L+s0XcnkqC8xZ a/3O89UHS6FaTQ2TBk/uRK31IvHDfmFSEK8VTytRwirGaOj/2gtjqw1M87VTty+VqOSA+HJdbb1F6 Xcjb7ajjAa2yuff0cRyw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mrnj0-002YTR-6G; Mon, 29 Nov 2021 20:58:11 +0000 Received: from sin.source.kernel.org ([2604:1380:40e1:4800::1]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mrmw3-002FPI-MJ for linux-arm-kernel@lists.infradead.org; Mon, 29 Nov 2021 20:07:37 +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 sin.source.kernel.org (Postfix) with ESMTPS id F1F31CE1685; Mon, 29 Nov 2021 20:07:32 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4577DC53FD1; Mon, 29 Nov 2021 20:07:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1638216451; bh=1Zg7MxAD5sCmymbTc5EDtJN7PJqUKc+Pm1ZgNIxAhTo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=W4XTdAZp+1uhCCcn0OpsCMPgwIR5JUIoCu7wuBOcTv6GnWqnYOSpk7oOLwNLzsslk jHjD6r3f1eIbv40BL/aKgl6QJnHny40IfBmr/BkGMam9zH+2up8EtXhLVkZ8QJPICr teUlY1ZlnGVNKUBoL1QWSixEXgPhBlKqNy0ZSPXKmzkE9BJolLS18vwVual0GyFncW tzxTJrUYOgMEAjgsq8cQ/TFMQziy2s/80QFumABtoAbNevB79XkTR5HKVNJCEGH2bm T6arsamaHwYfWDhww4EYkt00qTPgHLnTyi7fRcHHIZuuNECZx2LE/7SHbSyFH/BcGu R8zzIRbsBpvOA== 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 1mrmqq-008gvR-Oz; Mon, 29 Nov 2021 20:02:12 +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 , James Morse , Suzuki K Poulose , Alexandru Elisei , kernel-team@android.com Subject: [PATCH v5 11/69] KVM: arm64: nv: Add nested virt VCPU primitives for vEL2 VCPU state Date: Mon, 29 Nov 2021 20:00:52 +0000 Message-Id: <20211129200150.351436-12-maz@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20211129200150.351436-1-maz@kernel.org> References: <20211129200150.351436-1-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, james.morse@arm.com, suzuki.poulose@arm.com, alexandru.elisei@arm.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-20211129_120736_177023_548DF596 X-CRM114-Status: GOOD ( 15.10 ) 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. Signed-off-by: Christoffer Dall Signed-off-by: Marc Zyngier --- arch/arm64/include/asm/kvm_emulate.h | 55 ++++++++++++++++++++++++++++ 1 file changed, 55 insertions(+) diff --git a/arch/arm64/include/asm/kvm_emulate.h b/arch/arm64/include/asm/kvm_emulate.h index f4871e47b2d0..f4b079945d0f 100644 --- a/arch/arm64/include/asm/kvm_emulate.h +++ b/arch/arm64/include/asm/kvm_emulate.h @@ -176,6 +176,61 @@ 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_mode_el2_ctxt(const struct kvm_cpu_context *ctxt) +{ + unsigned long cpsr = ctxt->regs.pstate; + + switch (cpsr & (PSR_MODE32_BIT | PSR_MODE_MASK)) { + case PSR_MODE_EL2h: + case PSR_MODE_EL2t: + return true; + default: + return false; + } +} + +static inline bool vcpu_mode_el2(const struct kvm_vcpu *vcpu) +{ + return vcpu_mode_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' + */ + return vcpu_mode_el2_ctxt(ctxt) || + (__vcpu_el2_e2h_is_set(ctxt) && __vcpu_el2_tge_is_set(ctxt)) || + WARN_ON(__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 -- 2.30.2 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel