From: Dongjiu Geng <gengdongjiu@huawei.com>
To: <mst@redhat.com>, <imammedo@redhat.com>,
<xiaoguangrong.eric@gmail.com>, <shannon.zhaosl@gmail.com>,
<peter.maydell@linaro.org>, <fam@euphon.net>, <rth@twiddle.net>,
<ehabkost@redhat.com>, <mtosatti@redhat.com>,
<qemu-devel@nongnu.org>, <kvm@vger.kernel.org>,
<qemu-arm@nongnu.org>, <pbonzini@redhat.com>,
<james.morse@arm.com>, <lersek@redhat.com>,
<jonathan.cameron@huawei.com>,
<shameerali.kolothum.thodi@huawei.com>
Cc: zhengxiang9@huawei.com, gengdongjiu@huawei.com
Subject: [PATCH v23 2/9] docs: APEI GHES generation and CPER record description
Date: Sun, 16 Feb 2020 18:24:01 +0800 [thread overview]
Message-ID: <20200216102408.22987-4-gengdongjiu@huawei.com> (raw)
In-Reply-To: <20200216102408.22987-1-gengdongjiu@huawei.com>
Add APEI/GHES detailed design document
Signed-off-by: Dongjiu Geng <gengdongjiu@huawei.com>
Signed-off-by: Xiang Zheng <zhengxiang9@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
---
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..68f1fbe
--- /dev/null
+++ b/docs/specs/acpi_hest_ghes.rst
@@ -0,0 +1,110 @@
+APEI tables generating and CPER record
+======================================
+
+..
+ Copyright (c) 2020 HUAWEI TECHNOLOGIES CO., LTD.
+
+ This work is licensed under the terms of the GNU GPL, version 2 or later.
+ See the COPYING file in the top-level directory.
+
+Design Details
+--------------
+
+::
+
+ etc/acpi/tables etc/hardware_errors
+ ==================== ===============================
+ + +--------------------------+ +----------------------------+
+ | | 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 table.
+
+(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) bytes.
+ 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_errors"
+ 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" blob.
+
+(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 back
+ the guest-side allocation addresses to QEMU. The "etc/hardware_errors_addr"
+ blob contains a 8-byte entry. QEMU generates a single WRITE_POINTER command
+ for the firmware. The firmware will write back the start address of
+ "etc/hardware_errors" blob to the fw_cfg file "etc/hardware_errors_addr".
+
+(9) When QEMU gets a SIGBUS from the kernel, QEMU writes CPER into corresponding
+ "Error Status Data Block", guest memory, and then injects platform specific
+ 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 CPER error
+ and take appropriate action.
+
+(11) kvm_arch_on_sigbus_vcpu() uses source_id as index in "etc/hardware_errors" to
+ find out "Error Status Data Block" entry corresponding to error source. So supported
+ source_id values should be assigned here and not be changed afterwards to make sure
+ that guest will write error into expected "Error Status Data Block" even if guest was
+ migrated to a newer QEMU.
diff --git a/docs/specs/index.rst b/docs/specs/index.rst
index de46a8b..426632a 100644
--- a/docs/specs/index.rst
+++ b/docs/specs/index.rst
@@ -14,3 +14,4 @@ Contents:
ppc-spapr-xive
acpi_hw_reduced_hotplug
tpm
+ acpi_hest_ghes
--
1.8.3.1
next prev parent reply other threads:[~2020-02-16 10:25 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-16 10:23 [PATCH v1] acpi: nvdimm: change NVDIMM_UUID_LE to a common macro Dongjiu Geng
2020-02-16 10:23 ` [PATCH v23 0/9] Add ARMv8 RAS virtualization support in QEMU Dongjiu Geng
2020-02-16 10:24 ` [PATCH v23 1/9] hw/arm/virt: Introduce a RAS machine option Dongjiu Geng
2020-02-16 10:24 ` Dongjiu Geng [this message]
2020-02-16 10:24 ` [PATCH v23 3/9] ACPI: Build related register address fields via hardware error fw_cfg blob Dongjiu Geng
2020-02-16 10:24 ` [PATCH v23 4/9] ACPI: Build Hardware Error Source Table Dongjiu Geng
2020-02-16 10:24 ` [PATCH v23 5/9] ACPI: Record the Generic Error Status Block address Dongjiu Geng
2020-02-16 10:24 ` [PATCH v23 6/9] KVM: Move hwpoison page related functions into kvm-all.c Dongjiu Geng
2020-02-16 10:24 ` [PATCH v23 7/9] ACPI: Record Generic Error Status Block(GESB) table Dongjiu Geng
2020-02-16 10:24 ` [PATCH v23 8/9] target-arm: kvm64: handle SIGBUS signal from kernel or KVM Dongjiu Geng
2020-02-16 10:24 ` [PATCH v23 9/9] MAINTAINERS: Add ACPI/HEST/GHES entries Dongjiu Geng
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200216102408.22987-4-gengdongjiu@huawei.com \
--to=gengdongjiu@huawei.com \
--cc=ehabkost@redhat.com \
--cc=fam@euphon.net \
--cc=imammedo@redhat.com \
--cc=james.morse@arm.com \
--cc=jonathan.cameron@huawei.com \
--cc=kvm@vger.kernel.org \
--cc=lersek@redhat.com \
--cc=mst@redhat.com \
--cc=mtosatti@redhat.com \
--cc=pbonzini@redhat.com \
--cc=peter.maydell@linaro.org \
--cc=qemu-arm@nongnu.org \
--cc=qemu-devel@nongnu.org \
--cc=rth@twiddle.net \
--cc=shameerali.kolothum.thodi@huawei.com \
--cc=shannon.zhaosl@gmail.com \
--cc=xiaoguangrong.eric@gmail.com \
--cc=zhengxiang9@huawei.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).