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protos/linux_risc: Properly fill VirtualStart in memory map

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This lets Linux use UEFI runtime services.
This commit is contained in:
Kacper Słomiński
2024-06-16 19:02:49 +02:00
committed by mintsuki
parent b3d7688449
commit aed3b3348e
1 changed files with 6 additions and 4 deletions
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10
common/protos/linux_risc.c
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@@ -163,15 +163,17 @@ void *prepare_device_tree_blob(char *config, char *cmdline) {
panic(true, "linux: failed to set UEFI secure boot state: '%s'", fdt_strerror(ret));
}
// TODO(qookie): We should fill out VirtualStart for runtime entries and do
// SetVirtualMap here. Not doing this works, but Linux can't use UEFI
// runtime services.
size_t efi_mmap_entry_count = efi_mmap_size / efi_desc_size;
for (size_t i = 0; i < efi_mmap_entry_count; i++) {
EFI_MEMORY_DESCRIPTOR *entry = (void *)efi_mmap + i * efi_desc_size;
if (entry->Attribute & EFI_MEMORY_RUNTIME)
entry->VirtualStart = 0xFFFFFFFFFFFFFFFF;
entry->VirtualStart = entry->PhysicalStart;
}
EFI_STATUS status = gRT->SetVirtualAddressMap(efi_mmap_size, efi_desc_size, efi_desc_ver, efi_mmap);
if (status != EFI_SUCCESS) {
panic(false, "linux: failed to set UEFI virtual address map: '%x'", status);
}
return dtb;