[PATCH 05/17] Add minimum address parameter to efi_low_alloc()
From: Roy Franz <hidden>
Date: 2013-08-07 03:51:13
Also in:
linux-efi, lkml
Subsystem:
extensible firmware interface (efi), the rest, x86 architecture (32-bit and 64-bit) · Maintainers:
Ard Biesheuvel, Linus Torvalds, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen
This allows allocations to be made low in memory while avoiding allocations at the base of memory. Signed-off-by: Roy Franz <redacted> --- arch/x86/boot/compressed/eboot.c | 11 ++++++----- drivers/firmware/efi/efi-stub-helper.c | 5 ++++- 2 files changed, 10 insertions(+), 6 deletions(-)
diff --git a/arch/x86/boot/compressed/eboot.c b/arch/x86/boot/compressed/eboot.c
index 2a4430a..f44ef2f 100644
--- a/arch/x86/boot/compressed/eboot.c
+++ b/arch/x86/boot/compressed/eboot.c@@ -458,7 +458,7 @@ struct boot_params *make_boot_params(void *handle, efi_system_table_t *_table) } status = efi_low_alloc(sys_table, 0x4000, 1, - (unsigned long *)&boot_params); + (unsigned long *)&boot_params, 0); if (status != EFI_SUCCESS) { efi_printk(sys_table, "Failed to alloc lowmem for boot params\n"); return NULL;
@@ -505,7 +505,7 @@ struct boot_params *make_boot_params(void *handle, efi_system_table_t *_table) options_size++; /* NUL termination */ status = efi_low_alloc(sys_table, options_size, 1, - &cmdline); + &cmdline, 0); if (status != EFI_SUCCESS) { efi_printk(sys_table, "Failed to alloc mem for cmdline\n"); goto fail;
@@ -563,7 +563,8 @@ static efi_status_t exit_boot(struct boot_params *boot_params, again: size += sizeof(*mem_map) * 2; _size = size; - status = efi_low_alloc(sys_table, size, 1, (unsigned long *)&mem_map); + status = efi_low_alloc(sys_table, size, 1, + (unsigned long *)&mem_map, 0); if (status != EFI_SUCCESS) return status;
@@ -697,7 +698,7 @@ static efi_status_t relocate_kernel(struct setup_header *hdr) nr_pages, &start); if (status != EFI_SUCCESS) { status = efi_low_alloc(sys_table, hdr->init_size, - hdr->kernel_alignment, &start); + hdr->kernel_alignment, &start, 0); if (status != EFI_SUCCESS) efi_printk(sys_table, "Failed to alloc mem for kernel\n"); }
@@ -745,7 +746,7 @@ struct boot_params *efi_main(void *handle, efi_system_table_t *_table, gdt->size = 0x800; status = efi_low_alloc(sys_table, gdt->size, 8, - (unsigned long *)&gdt->address); + (unsigned long *)&gdt->address, 0); if (status != EFI_SUCCESS) { efi_printk(sys_table, "Failed to alloc mem for gdt\n"); goto fail;
diff --git a/drivers/firmware/efi/efi-stub-helper.c b/drivers/firmware/efi/efi-stub-helper.c
index 8e6a7f9..63e3556 100644
--- a/drivers/firmware/efi/efi-stub-helper.c
+++ b/drivers/firmware/efi/efi-stub-helper.c@@ -167,7 +167,7 @@ fail: */ static efi_status_t efi_low_alloc(efi_system_table_t *sys_table_arg, unsigned long size, unsigned long align, - unsigned long *addr) + unsigned long *addr, unsigned long min) { unsigned long map_size, desc_size; efi_memory_desc_t *map;
@@ -204,6 +204,9 @@ static efi_status_t efi_low_alloc(efi_system_table_t *sys_table_arg, if (start == 0x0) start += 8; + if (start < min) + start = min; + start = round_up(start, align); if ((start + size) > end) continue;
--
1.7.10.4