diff --git a/grub-core/loader/arm64/linux.c b/grub-core/loader/arm64/linux.c index c68423f48..db82a6c7a 100644 --- a/grub-core/loader/arm64/linux.c +++ b/grub-core/loader/arm64/linux.c @@ -195,6 +195,42 @@ grub_linux_unload (void) return GRUB_ERR_NONE; } +/* + * As per linux/Documentation/arm/Booting + * ARM initrd needs to be covered by kernel linear mapping, + * so place it in the first 512MB of DRAM. + * + * As per linux/Documentation/arm64/booting.txt + * ARM64 initrd needs to be contained entirely within a 1GB aligned window + * of up to 32GB of size that covers the kernel image as well. + * Since the EFI stub loader will attempt to load the kernel near start of + * RAM, place the buffer in the first 32GB of RAM. + */ +#ifdef __arm__ +#define INITRD_MAX_ADDRESS_OFFSET (512U * 1024 * 1024) +#else /* __aarch64__ */ +#define INITRD_MAX_ADDRESS_OFFSET (32ULL * 1024 * 1024 * 1024) +#endif + +/* + * This function returns a pointer to a legally allocated initrd buffer, + * or NULL if unsuccessful + */ +static void * +allocate_initrd_mem (int initrd_pages) +{ + grub_addr_t max_addr; + + if (grub_efi_get_ram_base (&max_addr) != GRUB_ERR_NONE) + return NULL; + + max_addr += INITRD_MAX_ADDRESS_OFFSET - 1; + + return grub_efi_allocate_pages_real (max_addr, initrd_pages, + GRUB_EFI_ALLOCATE_MAX_ADDRESS, + GRUB_EFI_LOADER_DATA); +} + static grub_err_t grub_cmd_initrd (grub_command_t cmd __attribute__ ((unused)), int argc, char *argv[]) @@ -223,7 +259,8 @@ grub_cmd_initrd (grub_command_t cmd __attribute__ ((unused)), grub_dprintf ("linux", "Loading initrd\n"); initrd_pages = (GRUB_EFI_BYTES_TO_PAGES (initrd_size)); - initrd_mem = grub_efi_allocate_any_pages (initrd_pages); + initrd_mem = allocate_initrd_mem (initrd_pages); + if (!initrd_mem) { grub_error (GRUB_ERR_OUT_OF_MEMORY, N_("out of memory"));