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authorLinus Torvalds2020-06-01 15:36:32 -0700
committerLinus Torvalds2020-06-01 15:36:32 -0700
commitc2b0fc847f3122e5a4176c3772626a7a8facced0 (patch)
tree8faa52de4e61cb58a12b2eea109ab28f1b43576e /drivers/firmware/efi/libstub/arm32-stub.c
parent533b220f7be4e461a5222a223d169b42856741ef (diff)
parentfb597f2a393294f3d3012ecb314f43b60fa48359 (diff)
Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm
Pull ARM updates from Russell King: - remove a now unnecessary usage of the KERNEL_DS for sys_oabi_epoll_ctl() - update my email address in a number of drivers - decompressor EFI updates from Ard Biesheuvel - module unwind section handling updates - sparsemem Kconfig cleanups - make act_mm macro respect THREAD_SIZE * tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm: ARM: 8980/1: Allow either FLATMEM or SPARSEMEM on the multiplatform build ARM: 8979/1: Remove redundant ARCH_SPARSEMEM_DEFAULT setting ARM: 8978/1: mm: make act_mm() respect THREAD_SIZE ARM: decompressor: run decompressor in place if loaded via UEFI ARM: decompressor: move GOT into .data for EFI enabled builds ARM: decompressor: defer loading of the contents of the LC0 structure ARM: decompressor: split off _edata and stack base into separate object ARM: decompressor: move headroom variable out of LC0 ARM: 8976/1: module: allow arch overrides for .init section names ARM: 8975/1: module: fix handling of unwind init sections ARM: 8974/1: use SPARSMEM_STATIC when SPARSEMEM is enabled ARM: 8971/1: replace the sole use of a symbol with its definition ARM: 8969/1: decompressor: simplify libfdt builds Update rmk's email address in various drivers ARM: compat: remove KERNEL_DS usage in sys_oabi_epoll_ctl()
Diffstat (limited to 'drivers/firmware/efi/libstub/arm32-stub.c')
-rw-r--r--drivers/firmware/efi/libstub/arm32-stub.c45
1 files changed, 6 insertions, 39 deletions
diff --git a/drivers/firmware/efi/libstub/arm32-stub.c b/drivers/firmware/efi/libstub/arm32-stub.c
index b038afe2ee7a..40243f524556 100644
--- a/drivers/firmware/efi/libstub/arm32-stub.c
+++ b/drivers/firmware/efi/libstub/arm32-stub.c
@@ -199,14 +199,8 @@ efi_status_t handle_kernel_image(unsigned long *image_addr,
unsigned long kernel_base;
efi_status_t status;
- /*
- * Verify that the DRAM base address is compatible with the ARM
- * boot protocol, which determines the base of DRAM by masking
- * off the low 27 bits of the address at which the zImage is
- * loaded. These assumptions are made by the decompressor,
- * before any memory map is available.
- */
- kernel_base = round_up(dram_base, SZ_128M);
+ /* use a 16 MiB aligned base for the decompressed kernel */
+ kernel_base = round_up(dram_base, SZ_16M) + TEXT_OFFSET;
/*
* Note that some platforms (notably, the Raspberry Pi 2) put
@@ -215,41 +209,14 @@ efi_status_t handle_kernel_image(unsigned long *image_addr,
* base of the kernel image is only partially used at the moment.
* (Up to 5 pages are used for the swapper page tables)
*/
- kernel_base += TEXT_OFFSET - 5 * PAGE_SIZE;
-
- status = reserve_kernel_base(kernel_base, reserve_addr, reserve_size);
+ status = reserve_kernel_base(kernel_base - 5 * PAGE_SIZE, reserve_addr,
+ reserve_size);
if (status != EFI_SUCCESS) {
efi_err("Unable to allocate memory for uncompressed kernel.\n");
return status;
}
- /*
- * Relocate the zImage, so that it appears in the lowest 128 MB
- * memory window.
- */
- *image_addr = (unsigned long)image->image_base;
- *image_size = image->image_size;
- status = efi_relocate_kernel(image_addr, *image_size, *image_size,
- kernel_base + MAX_UNCOMP_KERNEL_SIZE, 0, 0);
- if (status != EFI_SUCCESS) {
- efi_err("Failed to relocate kernel.\n");
- efi_free(*reserve_size, *reserve_addr);
- *reserve_size = 0;
- return status;
- }
-
- /*
- * Check to see if we were able to allocate memory low enough
- * in memory. The kernel determines the base of DRAM from the
- * address at which the zImage is loaded.
- */
- if (*image_addr + *image_size > dram_base + ZIMAGE_OFFSET_LIMIT) {
- efi_err("Failed to relocate kernel, no low memory available.\n");
- efi_free(*reserve_size, *reserve_addr);
- *reserve_size = 0;
- efi_free(*image_size, *image_addr);
- *image_size = 0;
- return EFI_LOAD_ERROR;
- }
+ *image_addr = kernel_base;
+ *image_size = 0;
return EFI_SUCCESS;
}