docs/specs/acpi_erst.rst

17 GET_ERROR_LOG_ADDRESS_RANGE_ATTRIBUTES) where non-volatile RAM is
19 implements the non-NVRAM "mode". This non-NVRAM "mode" is what is
22 time of this writing, Linux only supports the non-NVRAM "mode".
26 ---------------------
33 contain information available for post-mortem debugging.
43 resource-constrained microvms to very large guests, and in particular,
44 in direct-boot environments (which would lack UEFI run-time services).
51 -------------------
53 To use ACPI ERST, a memory-backend-file object and acpi-erst device
57  -object memory-backend-file,id=erstnvram,mem-path=acpi-erst.backing,size=0x10000,share=on \
58  -device acpi-erst,memdev=erstnvram
60 For proper operation, the ACPI ERST device needs a memory-backend-file
63  - id: The id of the memory-backend-file object is used to associate
64    this memory with the acpi-erst device.
65  - size: The size of the ACPI ERST backing storage. This parameter is
67  - mem-path: The location of the ACPI ERST backing storage file. This
69  - share: The share=on parameter is required so that updates to the
74  - memdev: Is the object id of the memory-backend-file.
75  - record_size: Specifies the size of the records (or slots) in the
81 -------------
88 64-bit registers.  All ERST actions/operations/side effects happen on
99 ----------------------
125         <------------------ 8KiB -------------------->
126         +--------------------------------------------+
128         +--------------------------------------------+
130         +--------------------------------------------+
132         +--------------------------------------------+
134         +--------------------------------------------+
136         +--------------------------------------------+
138         +--------------------------------------------+
148   +--------------------------------------------+
150   +--------------------------------------------+
152   +--------------------------------------------+
154   +--------------------------------------------+
156   +--------------------------------------------+
158   +--------------------------------------------+
160   +--------------------------------------------+
162   +--------------------------------------------+
176 The 'record_id' array fields are the 64-bit record identifiers of the
191 ----------