From nobody Tue Feb 10 08:03:32 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org ARC-Seal: i=1; a=rsa-sha256; t=1578483458; cv=none; d=zohomail.com; s=zohoarc; b=cRplDqNKmkYzNGGhDboiKDq4AZn8XzXqPRObuJ8a+ONBLvG3rKoX4sledHtqTyFNRUZBYh7MXgot3kvEaArsdVigJDgQpfX5WNrieqBSCXR2J6FGouDf6OeWjcuiV6LmQKi+HVHtMnPcDnuhuZTjeyCYeyzG/2KI+cHDN7ZKEA4= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1578483458; h=Content-Type:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=S+d6qPk3DuY1yrOr7+9ItFngMHdgqK9nGRjcZ29pMCg=; b=RU0EW18VrpopKq8V7RYmD321uNwY04LEHCCgZxlkBdOGx3yEEMcoVDPJN8wJizkVRAZimbTc9XDPg9WAk3RvOe//l4OrYlYk1tmHEviyEiuJniq8yRwIBUsz+QFZh7ymu4W1Qitt9kFbI8Q05Ygt1Q23nwwZe+7M+pTnjGtpbgg= ARC-Authentication-Results: i=1; mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1578483458978136.31255960374187; Wed, 8 Jan 2020 03:37:38 -0800 (PST) Received: from localhost ([::1]:42420 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ip9eb-0002n4-J1 for importer@patchew.org; Wed, 08 Jan 2020 06:37:37 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:55606) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ip9Zs-0005Gl-5c for qemu-devel@nongnu.org; Wed, 08 Jan 2020 06:32:46 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ip9Zq-0002fF-Hq for qemu-devel@nongnu.org; Wed, 08 Jan 2020 06:32:44 -0500 Received: from szxga04-in.huawei.com ([45.249.212.190]:2232 helo=huawei.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1ip9Zm-0002Y2-QK; Wed, 08 Jan 2020 06:32:39 -0500 Received: from DGGEMS401-HUB.china.huawei.com (unknown [172.30.72.60]) by Forcepoint Email with ESMTP id 8016C5DFD393B87F7E52; Wed, 8 Jan 2020 19:32:32 +0800 (CST) Received: from localhost.localdomain (10.151.151.249) by DGGEMS401-HUB.china.huawei.com (10.3.19.201) with Microsoft SMTP Server id 14.3.439.0; Wed, 8 Jan 2020 19:32:26 +0800 From: Dongjiu Geng To: , , , , , , , , , , , , , , , Subject: [PATCH v22 2/9] docs: APEI GHES generation and CPER record description Date: Wed, 8 Jan 2020 19:32:16 +0800 Message-ID: <1578483143-14905-3-git-send-email-gengdongjiu@huawei.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1578483143-14905-1-git-send-email-gengdongjiu@huawei.com> References: <1578483143-14905-1-git-send-email-gengdongjiu@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.151.151.249] X-CFilter-Loop: Reflected X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 45.249.212.190 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: zhengxiang9@huawei.com, linuxarm@huawei.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add APEI/GHES detailed design document Signed-off-by: Dongjiu Geng Signed-off-by: Xiang Zheng Reviewed-by: Michael S. Tsirkin Reviewed-by: Igor Mammedov --- docs/specs/acpi_hest_ghes.rst | 110 ++++++++++++++++++++++++++++++++++++++= ++++ docs/specs/index.rst | 1 + 2 files changed, 111 insertions(+) create mode 100644 docs/specs/acpi_hest_ghes.rst diff --git a/docs/specs/acpi_hest_ghes.rst b/docs/specs/acpi_hest_ghes.rst new file mode 100644 index 0000000..7a1aa90 --- /dev/null +++ b/docs/specs/acpi_hest_ghes.rst @@ -0,0 +1,110 @@ +APEI tables generating and CPER record +=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D + +.. + Copyright (c) 2019 HUAWEI TECHNOLOGIES CO., LTD. + + This work is licensed under the terms of the GNU GPL, version 2 or late= r. + See the COPYING file in the top-level directory. + +Design Details +-------------- + +:: + + etc/acpi/tables etc/hardware_errors + =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D = =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D + + +--------------------------+ +----------------------------+ + | | HEST | +--------->| error_block_address1 |= ------+ + | +--------------------------+ | +----------------------------+= | + | | GHES1 | | +------->| error_block_address2 |= ------+-+ + | +--------------------------+ | | +----------------------------+= | | + | | ................. | | | | .............. |= | | + | | error_status_address-----+-+ | -----------------------------+= | | + | | ................. | | +--->| error_block_addressN |= ------+-+---+ + | | read_ack_register--------+-+ | | +----------------------------+= | | | + | | read_ack_preserve | +-+---+--->| read_ack_register1 |= | | | + | | read_ack_write | | | +----------------------------+= | | | + + +--------------------------+ | +-+--->| read_ack_register2 |= | | | + | | GHES2 | | | | +----------------------------+= | | | + + +--------------------------+ | | | | ............. |= | | | + | | ................. | | | | +----------------------------+= | | | + | | error_status_address-----+---+ | | +->| read_ack_registerN |= | | | + | | ................. | | | | +----------------------------+= | | | + | | read_ack_register--------+-----+ | | |Generic Error Status Block 1|= <-----+ | | + | | read_ack_preserve | | | |-+------------------------+-+= | | + | | read_ack_write | | | | | CPER | |= | | + + +--------------------------| | | | | CPER | |= | | + | | ............... | | | | | .... | |= | | + + +--------------------------+ | | | | CPER | |= | | + | | GHESN | | | |-+------------------------+-|= | | + + +--------------------------+ | | |Generic Error Status Block 2|= <-------+ | + | | ................. | | | |-+------------------------+-+= | + | | error_status_address-----+-------+ | | | CPER | |= | + | | ................. | | | | CPER | |= | + | | read_ack_register--------+---------+ | | .... | |= | + | | read_ack_preserve | | | CPER | |= | + | | read_ack_write | +-+------------------------+-+= | + + +--------------------------+ | .......... |= | + |----------------------------+= | + |Generic Error Status Block N = |<----------+ + |-+-------------------------+-+ + | | CPER | | + | | CPER | | + | | .... | | + | | CPER | | + +-+-------------------------+-+ + + +(1) QEMU generates the ACPI HEST table. This table goes in the current + "etc/acpi/tables" fw_cfg blob. Each error source has different + notification types. + +(2) A new fw_cfg blob called "etc/hardware_errors" is introduced. QEMU + also needs to populate this blob. The "etc/hardware_errors" fw_cfg blob + contains an address registers table and an Error Status Data Block tab= le. + +(3) The address registers table contains N Error Block Address entries + and N Read Ack Register entries. The size for each entry is 8-byte. + The Error Status Data Block table contains N Error Status Data Block + entries. The size for each entry is 4096(0x1000) bytes. The total size + for the "etc/hardware_errors" fw_cfg blob is (N * 8 * 2 + N * 4096) by= tes. + N is the number of the kinds of hardware error sources. + +(4) QEMU generates the ACPI linker/loader script for the firmware. The + firmware pre-allocates memory for "etc/acpi/tables", "etc/hardware_err= ors" + and copies blob contents there. + +(5) QEMU generates N ADD_POINTER commands, which patch addresses in the + "error_status_address" fields of the HEST table with a pointer to the + corresponding "address registers" in the "etc/hardware_errors" blob. + +(6) QEMU generates N ADD_POINTER commands, which patch addresses in the + "read_ack_register" fields of the HEST table with a pointer to the + corresponding "read_ack_register" within the "etc/hardware_errors" blo= b. + +(7) QEMU generates N ADD_POINTER commands for the firmware, which patch + addresses in the "error_block_address" fields with a pointer to the + respective "Error Status Data Block" in the "etc/hardware_errors" blob. + +(8) QEMU defines a third and write-only fw_cfg blob which is called + "etc/hardware_errors_addr". Through that blob, the firmware can send b= ack + the guest-side allocation addresses to QEMU. The "etc/hardware_errors_= addr" + blob contains a 8-byte entry. QEMU generates a single WRITE_POINTER co= mmand + for the firmware. The firmware will write back the start address of + "etc/hardware_errors" blob to the fw_cfg file "etc/hardware_errors_add= r". + +(9) When QEMU gets a SIGBUS from the kernel, QEMU writes CPER into corresp= onding + "Error Status Data Block", guest memory, and then injects platform spe= cific + interrupt (in case of arm/virt machine it's Synchronous External Abort= ) as a + notification which is necessary for notifying the guest. + +(10) This notification (in virtual hardware) will be handled by the guest + kernel, on receiving notification, guest APEI driver could read the C= PER error + and take appropriate action. + +(11) kvm_arch_on_sigbus_vcpu() uses source_id as index in "etc/hardware_er= rors" to + find out "Error Status Data Block" entry corresponding to error sourc= e. So supported + source_id values should be assigned here and not be changed afterward= s to make sure + that guest will write error into expected "Error Status Data Block" e= ven if guest was + migrated to a newer QEMU. diff --git a/docs/specs/index.rst b/docs/specs/index.rst index 984ba44..3019b9c 100644 --- a/docs/specs/index.rst +++ b/docs/specs/index.rst @@ -13,3 +13,4 @@ Contents: ppc-xive ppc-spapr-xive acpi_hw_reduced_hotplug + acpi_hest_ghes --=20 1.8.3.1