diff options
| -rw-r--r-- | drivers/firmware/efi/libstub/arm-stub.c | 5 | ||||
| -rw-r--r-- | drivers/firmware/efi/libstub/efi-stub-helper.c | 10 | ||||
| -rw-r--r-- | drivers/firmware/efi/libstub/efistub.h | 1 | ||||
| -rw-r--r-- | drivers/firmware/efi/libstub/fdt.c | 3 |
4 files changed, 19 insertions, 0 deletions
diff --git a/drivers/firmware/efi/libstub/arm-stub.c b/drivers/firmware/efi/libstub/arm-stub.c index eee42d5e25ee..626ec4b4a664 100644 --- a/drivers/firmware/efi/libstub/arm-stub.c +++ b/drivers/firmware/efi/libstub/arm-stub.c @@ -370,6 +370,11 @@ void efi_get_virtmap(efi_memory_desc_t *memory_map, unsigned long map_size, paddr = in->phys_addr; size = in->num_pages * EFI_PAGE_SIZE; + if (novamap()) { + in->virt_addr = in->phys_addr; + continue; + } + /* * Make the mapping compatible with 64k pages: this allows * a 4k page size kernel to kexec a 64k page size kernel and diff --git a/drivers/firmware/efi/libstub/efi-stub-helper.c b/drivers/firmware/efi/libstub/efi-stub-helper.c index 8f2d000bec75..e4610e72b78f 100644 --- a/drivers/firmware/efi/libstub/efi-stub-helper.c +++ b/drivers/firmware/efi/libstub/efi-stub-helper.c @@ -31,6 +31,7 @@ static unsigned long __chunk_size = EFI_READ_CHUNK_SIZE; static int __section(.data) __nokaslr; static int __section(.data) __quiet; +static int __section(.data) __novamap; int __pure nokaslr(void) { @@ -40,6 +41,10 @@ int __pure is_quiet(void) { return __quiet; } +int __pure novamap(void) +{ + return __novamap; +} #define EFI_MMAP_NR_SLACK_SLOTS 8 @@ -479,6 +484,11 @@ efi_status_t efi_parse_options(char const *cmdline) __chunk_size = -1UL; } + if (!strncmp(str, "novamap", 7)) { + str += strlen("novamap"); + __novamap = 1; + } + /* Group words together, delimited by "," */ while (*str && *str != ' ' && *str != ',') str++; diff --git a/drivers/firmware/efi/libstub/efistub.h b/drivers/firmware/efi/libstub/efistub.h index cefcf6ba3150..1b1dfcaa6fb9 100644 --- a/drivers/firmware/efi/libstub/efistub.h +++ b/drivers/firmware/efi/libstub/efistub.h @@ -27,6 +27,7 @@ extern int __pure nokaslr(void); extern int __pure is_quiet(void); +extern int __pure novamap(void); #define pr_efi(sys_table, msg) do { \ if (!is_quiet()) efi_printk(sys_table, "EFI stub: "msg); \ diff --git a/drivers/firmware/efi/libstub/fdt.c b/drivers/firmware/efi/libstub/fdt.c index 7cfc51935c4b..5440ba17a1c5 100644 --- a/drivers/firmware/efi/libstub/fdt.c +++ b/drivers/firmware/efi/libstub/fdt.c @@ -318,6 +318,9 @@ efi_status_t allocate_new_fdt_and_exit_boot(efi_system_table_t *sys_table, if (status == EFI_SUCCESS) { efi_set_virtual_address_map_t *svam; + if (novamap()) + return EFI_SUCCESS; + /* Install the new virtual address map */ svam = sys_table->runtime->set_virtual_address_map; status = svam(runtime_entry_count * desc_size, desc_size, |