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[Qemu-devel] How to reserve guest physical region for ACPI
From: |
Xiao Guangrong |
Subject: |
[Qemu-devel] How to reserve guest physical region for ACPI |
Date: |
Mon, 28 Dec 2015 10:39:04 +0800 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.4.0 |
Hi Michael, Paolo,
Now it is the time to return to the challenge that how to reserve guest
physical region internally used by ACPI.
Igor suggested that:
| An alternative place to allocate reserve from could be high memory.
| For pc we have "reserved-memory-end" which currently makes sure
| that hotpluggable memory range isn't used by firmware
(https://lists.nongnu.org/archive/html/qemu-devel/2015-11/msg00926.html)
he also innovated a way to use 64-bit address in DSDT/SSDT.rev = 1:
| when writing ASL one shall make sure that only XP supported
| features are in global scope, which is evaluated when tables
| are loaded and features of rev2 and higher are inside methods.
| That way XP doesn't crash as far as it doesn't evaluate unsupported
| opcode and one can guard those opcodes checking _REV object if neccesary.
(https://lists.nongnu.org/archive/html/qemu-devel/2015-11/msg01010.html)
Michael, Paolo, what do you think about these ideas?
Thanks!
- [Qemu-devel] [PATCH v9 0/5] implement vNVDIMM, Xiao Guangrong, 2015/12/02
- [Qemu-devel] [PATCH v9 1/5] nvdimm: implement NVDIMM device abstract, Xiao Guangrong, 2015/12/02
- [Qemu-devel] [PATCH v9 2/5] acpi: support specified oem table id for build_header, Xiao Guangrong, 2015/12/02
- [Qemu-devel] [PATCH v9 3/5] nvdimm acpi: build ACPI NFIT table, Xiao Guangrong, 2015/12/02
- [Qemu-devel] [PATCH v9 5/5] nvdimm: add maintain info, Xiao Guangrong, 2015/12/02
- [Qemu-devel] [PATCH v9 4/5] nvdimm acpi: build ACPI nvdimm devices, Xiao Guangrong, 2015/12/02
- Re: [Qemu-devel] [PATCH v9 0/5] implement vNVDIMM, Xiao Guangrong, 2015/12/09
- [Qemu-devel] How to reserve guest physical region for ACPI,
Xiao Guangrong <=