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 X-Spam-Level: X-Spam-Status: No, score=-16.5 required=3.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED,DKIM_INVALID,DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 423A3C63697 for ; Thu, 26 Nov 2020 15:55:11 +0000 (UTC) Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by mail.kernel.org (Postfix) with ESMTP id D077821D7E for ; Thu, 26 Nov 2020 15:55:10 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=google.com header.i=@google.com header.b="mX8bYR+x" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D077821D7E Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=google.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvmarm-bounces@lists.cs.columbia.edu Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 855164BCEF; Thu, 26 Nov 2020 10:55:10 -0500 (EST) X-Virus-Scanned: at lists.cs.columbia.edu Authentication-Results: mm01.cs.columbia.edu (amavisd-new); dkim=softfail (fail, message has been altered) header.i=@google.com Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id XqLWPOYbodVG; Thu, 26 Nov 2020 10:55:09 -0500 (EST) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 75AF24C0C0; Thu, 26 Nov 2020 10:55:09 -0500 (EST) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id BCDEA4BC69 for ; Thu, 26 Nov 2020 10:55:07 -0500 (EST) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id cKW2UFBTunOP for ; Thu, 26 Nov 2020 10:55:06 -0500 (EST) Received: from mail-wr1-f68.google.com (mail-wr1-f68.google.com [209.85.221.68]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id B67294BA29 for ; Thu, 26 Nov 2020 10:55:06 -0500 (EST) Received: by mail-wr1-f68.google.com with SMTP id p8so2640894wrx.5 for ; Thu, 26 Nov 2020 07:55:06 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=yTPqxuNIHyHcxIGVDRFuzMb//a26J9RNoM2ThcyKbSM=; b=mX8bYR+xBsOyOIWEN8DX7gK/3reSGxDblgkVy4BFuCXdMl/4FvAYp/nmuGo1JoWP9P t6aYDDfb/OykyYNtU+YjrQpGHnafiTiCP67R+SMGTyaiF8vjgYt0Fvys9qkoErbLGFR9 we1WLjGlgUNDIDPEBeUD4Alzz5Om/fnxds/Oxp5CzjqLXbiXrL9tA5FQ1fQEZMm617TK IdSpNFJ2H05e+uXFDCHwheCyX3oSyvQ7+b/+18Q/kDteenUlTRRV+WrhBV712PuxD+Kx wmzbfiP7gvyDFfsWCOAGPdMnOJDwhL/l00+ToHh9zpX87qwlANYNEterelAS3s8rUwBU 5CJg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=yTPqxuNIHyHcxIGVDRFuzMb//a26J9RNoM2ThcyKbSM=; b=ZzD8fiJW9iIC4/LFUqPW/PPfv9CVHYRNnCUuh/YrEk/trWbUXQUIS5PVuImcV/bFIg UImo2uehTxf6i8HKqB4zPV1ckJI0mEHTmhRgxhhWkYChtJ0EbH6zxhSzSNaCFpdHBJeu /6YY6UPOIO8oZIj0He/813yr9PrI1ntuUubcarvRc9IhZ6ldHvyTZQVP3T0me6qXMGrs BvrG3NXkfP4N/4Hi7OSmxiJd5TLwJyMwnkj07Sagu6PunmwuaXsFcZSSkh7JSmdE3VYa GRZD5tiSOI/2Ffd7slRGRcai3ibMF30OQgjUyaaOnyrZC4XIZdeib9ufbvXLtCH1duh/ cAwA== X-Gm-Message-State: AOAM531O8QJJm34yH13twuZp+srPT9Fa+rYK4psjp7dl4JfMXkv7z94d +OjTkH2bcrTujotZdHApoqJpRJnSacfc+73n X-Google-Smtp-Source: ABdhPJwX4rEG3aPSmYGdOs6RN45Cetge/Lz5Y7cdyVn5fxjNFMXKsImO/VR5cgpiiWFbabfK0CSr1g== X-Received: by 2002:adf:f888:: with SMTP id u8mr4544222wrp.381.1606406105448; Thu, 26 Nov 2020 07:55:05 -0800 (PST) Received: from localhost ([2a01:4b00:8523:2d03:f008:704d:8d4b:9951]) by smtp.gmail.com with ESMTPSA id s25sm8628255wmh.16.2020.11.26.07.55.04 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 26 Nov 2020 07:55:04 -0800 (PST) From: David Brazdil To: kvmarm@lists.cs.columbia.edu Subject: [PATCH v3 18/23] kvm: arm64: Add function to enter host from KVM nVHE hyp code Date: Thu, 26 Nov 2020 15:54:16 +0000 Message-Id: <20201126155421.14901-19-dbrazdil@google.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201126155421.14901-1-dbrazdil@google.com> References: <20201126155421.14901-1-dbrazdil@google.com> MIME-Version: 1.0 Cc: Lorenzo Pieralisi , kernel-team@android.com, Jonathan Corbet , Catalin Marinas , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, Sudeep Holla , linux-arm-kernel@lists.infradead.org, Marc Zyngier , Tejun Heo , Dennis Zhou , Christoph Lameter , Will Deacon 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 All nVHE hyp code is currently executed as handlers of host's HVCs. This will change as nVHE starts intercepting host's PSCI CPU_ON SMCs. The newly booted CPU will need to initialize EL2 state and then enter the host. Add __host_enter function that branches into the existing host state-restoring code after the trap handler would have returned. Signed-off-by: David Brazdil --- arch/arm64/kvm/hyp/nvhe/host.S | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/arch/arm64/kvm/hyp/nvhe/host.S b/arch/arm64/kvm/hyp/nvhe/host.S index 2b56f0bdf874..a820dfdc9c25 100644 --- a/arch/arm64/kvm/hyp/nvhe/host.S +++ b/arch/arm64/kvm/hyp/nvhe/host.S @@ -39,6 +39,7 @@ SYM_FUNC_START(__host_exit) bl handle_trap /* Restore host regs x0-x17 */ +__host_enter_restore_full: ldp x0, x1, [x29, #CPU_XREG_OFFSET(0)] ldp x2, x3, [x29, #CPU_XREG_OFFSET(2)] ldp x4, x5, [x29, #CPU_XREG_OFFSET(4)] @@ -61,6 +62,14 @@ __host_enter_without_restoring: sb SYM_FUNC_END(__host_exit) +/* + * void __noreturn __host_enter(struct kvm_cpu_context *host_ctxt); + */ +SYM_FUNC_START(__host_enter) + mov x29, x0 + b __host_enter_restore_full +SYM_FUNC_END(__host_enter) + /* * void __noreturn __hyp_do_panic(bool restore_host, u64 spsr, u64 elr, u64 par); */ -- 2.29.2.454.gaff20da3a2-goog _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm