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linux/efi: Perform efi_memmap_size=0 workaround for 32 on 64 as well

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mintsuki 2022-09-22 18:10:08 +02:00
parent 390372533f
commit b9f41799b4
1 changed files with 12 additions and 5 deletions
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17
common/protos/linux.c
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@ -30,6 +30,8 @@ noreturn void linux_spinup(void *entry, void *boot_params);
#define E820_MAX_ENTRIES_ZEROPAGE 128
#define EDDMAXNR 6
#define XLF_KERNEL_64 (1 << 0)
struct setup_header {
uint8_t setup_sects;
uint16_t root_flags;
@ -591,13 +593,18 @@ set_textmode:;
boot_params->efi_info.efi_memmap = (uint32_t)(uint64_t)(uintptr_t)efi_mmap;
boot_params->efi_info.efi_memmap_hi = (uint32_t)((uint64_t)(uintptr_t)efi_mmap >> 32);
#if defined (__x86_64__)
boot_params->efi_info.efi_memmap_size = efi_mmap_size;
if ((setup_header->xloadflags & XLF_KERNEL_64) == 0) {
#elif defined (__i386__)
// A memmap size of 0 will cause Linux to force bail out of trying to use
// 32-bit EFI runtime services without ignoring other EFI info.
// XXX: Figure out why 64-bit Linux hangs if trying to use 32-bit boot services.
boot_params->efi_info.efi_memmap_size = 0;
if ((setup_header->xloadflags & XLF_KERNEL_64) != 0) {
#endif
// A memmap size of 0 will cause Linux to force bail out of trying to use
// mismatched bitness EFI runtime services without ignoring other EFI info.
// XXX: Figure out why 64-bit Linux hangs if trying to use 32-bit boot services,
// and vice versa.
boot_params->efi_info.efi_memmap_size = 0;
} else {
boot_params->efi_info.efi_memmap_size = efi_mmap_size;
}
boot_params->efi_info.efi_memdesc_size = efi_desc_size;
boot_params->efi_info.efi_memdesc_version = efi_desc_ver;
#endif