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Mon, 26 Oct 2020 20:20:11 +0000 Received: from abhmp0019.oracle.com (abhmp0019.oracle.com [141.146.116.25]) by userv0121.oracle.com (8.14.4/8.13.8) with ESMTP id 09QKKAvl009717; Mon, 26 Oct 2020 20:20:10 GMT Received: from vm345.localdomain (/10.149.224.210) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Mon, 26 Oct 2020 13:20:09 -0700 From: Eric DeVolder To: qemu-devel@nongnu.org Subject: [PATCH 0/1] acpi: Implement ACPI ERST support for guests Date: Mon, 26 Oct 2020 16:19:32 -0400 Message-Id: <1603743573-9870-1-git-send-email-eric.devolder@oracle.com> X-Mailer: git-send-email 1.8.3.1 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9786 signatures=668682 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 phishscore=0 bulkscore=0 suspectscore=1 malwarescore=0 mlxlogscore=601 mlxscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2010260133 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9786 signatures=668682 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxscore=0 impostorscore=0 mlxlogscore=613 malwarescore=0 lowpriorityscore=0 bulkscore=0 priorityscore=1501 spamscore=0 phishscore=0 clxscore=1011 suspectscore=1 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2010260133 Received-SPF: pass client-ip=141.146.126.79; envelope-from=eric.devolder@oracle.com; helo=aserp2130.oracle.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/10/26 16:20:13 X-ACL-Warn: Detected OS = Linux 3.1-3.10 [fuzzy] X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, UNPARSEABLE_RELAY=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-Mailman-Approved-At: Mon, 26 Oct 2020 16:46:19 -0400 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: ehabkost@redhat.com, mst@redhat.com, konrad.wilk@oracle.com, pbonzini@redhat.com, imammedo@redhat.com, boris.ostrovsky@oracle.com, rth@twiddle.net Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" This changeset introduces support for the ACPI Error Record Serialization Table, ERST. The change to hw/acpi/meson.build simply adds in the new .c file for compilation. The change to hw/i386/acpi-build.c calls out the building of the ERST table (and also creates the associated device). The new file hw/acpi/erst.c contains the building of the ERST table, as well as the simple device for exchanging error records. The new file include/hw/acpi/erst.h contains associated definitions and declarations for ERST. The primary description of this changeset is in the patch commit message. NOTES: When reviewing, I would especially appreciate feedback on the following topics: - The hope is to have ERST always present if ACPI is enabled, however, I have found it difficult to devise a method for passing the base address that does not require the workaround at the bottom of build_erst(). The issues I encountered are: - desire to keep this is common ACPI code - the device requires a qdev_new(), this needs to happen early, thus the workaround in build_erst() - the base address is machine/arch specific (eg ARM vs x86) I've not found a nice way to thread this needle, so what I've settled on is to simply lump ERST on to the CONFIG_ACPI (rather than a separate CONFIG_ACPI_ERST), and the workaround at the bottom of build_erst(). I suspect there is a better way for a built-in/ always present device. This does not support "-device acpi-erst,...". - I found a base address that "worked", but would like an address that would be known to be availabe, and then to document/reserve it for ERST. This takes into account that the base address can be different for x86 vs ARM. - I've run this through checkpatch, and all issues addressed except for the long lines in build_erst(). For readable I left the long lines, but will change if asked. - What else do I need to provide? Signed-off-by: Eric DeVolder --- hw/acpi/erst.c | 909 +++++++++++++++++++++++++++++++++++++++++++++++++ hw/acpi/meson.build | 1 + hw/i386/acpi-build.c | 4 + include/hw/acpi/erst.h | 97 ++++++ 4 files changed, 1011 insertions(+) create mode 100644 hw/acpi/erst.c create mode 100644 include/hw/acpi/erst.h