From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jintack Lim Subject: [RFC PATCH v2 09/38] KVM: arm64: Add the shadow context for virtual EL2 execution Date: Tue, 18 Jul 2017 11:58:35 -0500 Message-ID: <1500397144-16232-10-git-send-email-jintack.lim@linaro.org> References: <1500397144-16232-1-git-send-email-jintack.lim@linaro.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: kvm@vger.kernel.org, david.daney@cavium.com, catalin.marinas@arm.com, will.deacon@arm.com, stefan@hello-penguin.com, corbet@lwn.net, daniel.lezcano@linaro.org, linux@armlinux.org.uk, linux-arm-kernel@lists.infradead.org, andy.gross@linaro.org, cov@codeaurora.org, wcohen@redhat.com, mchehab@kernel.org, ard.biesheuvel@linaro.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, pbonzini@redhat.com, akpm@linux-foundation.org To: kvmarm@lists.cs.columbia.edu, christoffer.dall@linaro.org, marc.zyngier@arm.com Return-path: In-Reply-To: <1500397144-16232-1-git-send-email-jintack.lim@linaro.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu List-Id: kvm.vger.kernel.org With the nested virtualization support, a hypervisor running inside a VM (i.e. a guest hypervisor) is now deprivilaged and runs in EL1 instead of EL2. So, the host hypervisor manages the shadow context for the virtual EL2 execution. Signed-off-by: Jintack Lim --- arch/arm64/include/asm/kvm_host.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 57dccde..46880c3 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -229,6 +229,19 @@ struct kvm_cpu_context { }; u64 el2_special_regs[NR_EL2_SPECIAL_REGS]; + + u64 shadow_sys_regs[NR_SYS_REGS]; /* only used for virtual EL2 */ + + /* + * hw_* will be written to the hardware when entering to a VM. + * They have either the virtual EL2 or EL1/EL0 context depending + * on the vcpu mode. + */ + u64 *hw_sys_regs; + u64 hw_sp_el1; + u64 hw_pstate; + u64 hw_elr_el1; + u64 hw_spsr_el1; }; typedef struct kvm_cpu_context kvm_cpu_context_t; -- 1.9.1