From patchwork Mon Feb 10 06:02:56 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mauro Carvalho Chehab X-Patchwork-Id: 11372579 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id AC8D192A for ; Mon, 10 Feb 2020 06:04:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8B26B21927 for ; Mon, 10 Feb 2020 06:04:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581314640; bh=kza+nIaub/EO+u1abwbBpyZvce4UHjBfCCjb8bXTkqw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=AW2wHejqohwxbtGhk8JyPznea8MQ9fQD4rRGf3a4Y8mYy598SCKEYPQQlDQcso4mv 409zy5YpXRWGno3GrxN9+dBGwjfiB2IvqTAzRS/N0cC/dK4P5shoA1SKi6Sni78TKh OPiinmgx2zY91FNc7NGOuPq2E7LY4+n0aVB5wg+k= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727752AbgBJGDp (ORCPT ); Mon, 10 Feb 2020 01:03:45 -0500 Received: from bombadil.infradead.org ([198.137.202.133]:36330 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727508AbgBJGDM (ORCPT ); Mon, 10 Feb 2020 01:03:12 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Sender:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description; bh=p2YhU3jfC3+pZD58yyGjx9QrnEOyUsPJA0xSIIWllRk=; b=c9V4kU8saJN9Y9mvu0C3MA0dxc 2rNYXuRxjKsOO1gQZkbQyxByF2w2v6RHgT15ytnblAeVKkxTVLq62d49oRnZuR0PrGF8St9nlp+g8 bsAmfV0ch6BoCJVR6v+G7YPb6f6IWoKonrdKBGfbGrUpAOC4tvhjHjVEDKkwQhCciBlrgprgKp432 J07yMjFfnEWRAC4/SMnjBSHeqmTTvIN4hJeQ2JTNP+LeFzWs9JGrjW0H41dBcXhAo7W+sy38LO6kX ojRYybOh2CCo52dlXCWD9zySo1lpkMhLvZYFv2aX9WVf0JBTNLJeiPEumzHtcP6mq3/wufxissrCS hzjIDpeA==; Received: from [80.156.29.194] (helo=bombadil.infradead.org) by bombadil.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1j12A4-0006Ts-2b; Mon, 10 Feb 2020 06:03:12 +0000 Received: from mchehab by bombadil.infradead.org with local (Exim 4.92.3) (envelope-from ) id 1j12A2-00C2W0-Cs; Mon, 10 Feb 2020 07:03:10 +0100 From: Mauro Carvalho Chehab To: Linux Media Mailing List Cc: Mauro Carvalho Chehab , Mauro Carvalho Chehab , Paolo Bonzini , Jonathan Corbet , kvm@vger.kernel.org, linux-doc@vger.kernel.org Subject: [PATCH 18/28] docs: kvm: convert arm/hyp-abi.txt to ReST Date: Mon, 10 Feb 2020 07:02:56 +0100 Message-Id: X-Mailer: git-send-email 2.24.1 In-Reply-To: References: MIME-Version: 1.0 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org - Add proper markups for titles; - Adjust whitespaces and blank lines to match ReST needs; - Mark literal blocks as such. Signed-off-by: Mauro Carvalho Chehab --- .../virt/kvm/arm/{hyp-abi.txt => hyp-abi.rst} | 28 +++++++++++++------ Documentation/virt/kvm/arm/index.rst | 1 + 2 files changed, 20 insertions(+), 9 deletions(-) rename Documentation/virt/kvm/arm/{hyp-abi.txt => hyp-abi.rst} (79%) diff --git a/Documentation/virt/kvm/arm/hyp-abi.txt b/Documentation/virt/kvm/arm/hyp-abi.rst similarity index 79% rename from Documentation/virt/kvm/arm/hyp-abi.txt rename to Documentation/virt/kvm/arm/hyp-abi.rst index a20a0bee268d..d1fc27d848e9 100644 --- a/Documentation/virt/kvm/arm/hyp-abi.txt +++ b/Documentation/virt/kvm/arm/hyp-abi.rst @@ -1,4 +1,8 @@ -* Internal ABI between the kernel and HYP +.. SPDX-License-Identifier: GPL-2.0 + +======================================= +Internal ABI between the kernel and HYP +======================================= This file documents the interaction between the Linux kernel and the hypervisor layer when running Linux as a hypervisor (for example @@ -19,25 +23,31 @@ and only act on individual CPUs. Unless specified otherwise, any built-in hypervisor must implement these functions (see arch/arm{,64}/include/asm/virt.h): -* r0/x0 = HVC_SET_VECTORS - r1/x1 = vectors +* :: + + r0/x0 = HVC_SET_VECTORS + r1/x1 = vectors Set HVBAR/VBAR_EL2 to 'vectors' to enable a hypervisor. 'vectors' must be a physical address, and respect the alignment requirements of the architecture. Only implemented by the initial stubs, not by Linux hypervisors. -* r0/x0 = HVC_RESET_VECTORS +* :: + + r0/x0 = HVC_RESET_VECTORS Turn HYP/EL2 MMU off, and reset HVBAR/VBAR_EL2 to the initials stubs' exception vector value. This effectively disables an existing hypervisor. -* r0/x0 = HVC_SOFT_RESTART - r1/x1 = restart address - x2 = x0's value when entering the next payload (arm64) - x3 = x1's value when entering the next payload (arm64) - x4 = x2's value when entering the next payload (arm64) +* :: + + r0/x0 = HVC_SOFT_RESTART + r1/x1 = restart address + x2 = x0's value when entering the next payload (arm64) + x3 = x1's value when entering the next payload (arm64) + x4 = x2's value when entering the next payload (arm64) Mask all exceptions, disable the MMU, move the arguments into place (arm64 only), and jump to the restart address while at HYP/EL2. This diff --git a/Documentation/virt/kvm/arm/index.rst b/Documentation/virt/kvm/arm/index.rst index e039d9b1e076..134fa5fa77e5 100644 --- a/Documentation/virt/kvm/arm/index.rst +++ b/Documentation/virt/kvm/arm/index.rst @@ -7,4 +7,5 @@ ARM .. toctree:: :maxdepth: 2 + hyp-abi pvtime