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8d127aa866
edk2 looks for the etc/hardware-info fw_cfg file to discover hardware which can not easily be found in other ways. Entries consist of a header with hardware type and entry size (HARDWARE_INFO_HEADER), followed by the actual hardware description (which is type specific). The file can have multiple entries. This patch adds the infrastructure to add entries to the file and an entry struct for simple devices (HARDWARE_INFO_SIMPLE_DEVICE) which have an mmio address only. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Message-ID: <20250225163031.1409078-2-kraxel@redhat.com>
31 lines
789 B
C
31 lines
789 B
C
/*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*
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* pass hardware information to uefi
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*
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* see OvmfPkg/Library/HardwareInfoLib/ in edk2
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*/
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#include "qemu/osdep.h"
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#include "hw/nvram/fw_cfg.h"
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#include "hw/uefi/hardware-info.h"
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static void *blob;
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static uint64_t blobsize;
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void hardware_info_register(HARDWARE_INFO_TYPE type, void *info, uint64_t infosize)
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{
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HARDWARE_INFO_HEADER hdr = {
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.type.value = cpu_to_le64(type),
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.size = cpu_to_le64(infosize),
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};
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blob = g_realloc(blob, blobsize + sizeof(hdr) + infosize);
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memcpy(blob + blobsize, &hdr, sizeof(hdr));
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blobsize += sizeof(hdr);
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memcpy(blob + blobsize, info, infosize);
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blobsize += infosize;
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fw_cfg_modify_file(fw_cfg_find(), "etc/hardware-info", blob, blobsize);
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}
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