On 09/13/15 14:34, Michael S. Tsirkin wrote: > On Sun, Sep 13, 2015 at 01:56:44PM +0200, Laszlo Ersek wrote: >> As the subject suggests, I have terrible news. >> >> I'll preserve the full context here, so that it's easy to scroll back to >> the ASL for reference. >> >> I'm also CC'ing edk2-devel, because a number of BIOS developers should >> be congregating there. > > Wow, bravo! It does look like we need to go back to > the drawing board.
Thank you. :) > The only crazy thing you didn't try is to use > an XSDT instead of the DSDT. > I find it unlikely that this will help ... > Actually, I forgot to mention it, but I *did* try to use XSDT, sort of automatically. I had mentioned earlier that EFI_ACPI_TABLE_PROTOCOL automatically links stuff into both RSDT and XSDT, and I verified in this case that the UEFI ACPI Data Table *was* linked into the XSDT. ----*---- [root@ovmf-fedora acpi.6]# dmesg | grep UEFI [ 0.000000] ACPI: UEFI 0x000000003E8F1000 00003E (v01 BOCHS QEMUPARM 00000001 BXPC 00000001) ----*---- [root@ovmf-fedora acpi.6]# cat xsdt.dsl /* * Intel ACPI Component Architecture * AML/ASL+ Disassembler version 20150515-64 * Copyright (c) 2000 - 2015 Intel Corporation * * Disassembly of xsdt.dat, Sun Sep 13 14:54:17 2015 * * ACPI Data Table [XSDT] * * Format: [HexOffset DecimalOffset ByteLength] FieldName : FieldValue */ [000h 0000 4] Signature : "XSDT" [Extended System Description Table] [004h 0004 4] Table Length : 0000004C [008h 0008 1] Revision : 01 [009h 0009 1] Checksum : 90 [00Ah 0010 6] Oem ID : "BOCHS " [010h 0016 8] Oem Table ID : "BXPCFACP" [018h 0024 4] Oem Revision : 00000001 [01Ch 0028 4] Asl Compiler ID : " " [020h 0032 4] Asl Compiler Revision : 01000013 [024h 0036 8] ACPI Table Address 0 : 000000003FEF5000 [02Ch 0044 8] ACPI Table Address 1 : 000000003FEF4000 [034h 0052 8] ACPI Table Address 2 : 000000003FEF3000 [03Ch 0060 8] ACPI Table Address 3 : 000000003FEF2000 [044h 0068 8] ACPI Table Address 4 : 000000003E8F1000 Raw Table Data: Length 76 (0x4C) 0000: 58 53 44 54 4C 00 00 00 01 90 42 4F 43 48 53 20 // XSDTL.....BOCHS 0010: 42 58 50 43 46 41 43 50 01 00 00 00 20 20 20 20 // BXPCFACP.... 0020: 13 00 00 01 00 50 EF 3F 00 00 00 00 00 40 EF 3F // .....P.?.....@.? 0030: 00 00 00 00 00 30 EF 3F 00 00 00 00 00 20 EF 3F // .....0.?..... .? 0040: 00 00 00 00 00 10 8F 3E 00 00 00 00 // .......>.... ----*---- See "ACPI Table Address 4", 3E8F1000. Thanks! Laszlo
