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-rw-r--r--drivers/firmware/efi/libstub/efistub.h8
-rw-r--r--drivers/firmware/efi/libstub/fdt.c87
2 files changed, 56 insertions, 39 deletions
diff --git a/drivers/firmware/efi/libstub/efistub.h b/drivers/firmware/efi/libstub/efistub.h
index b98824e3800a..0e2a96b12cb3 100644
--- a/drivers/firmware/efi/libstub/efistub.h
+++ b/drivers/firmware/efi/libstub/efistub.h
@@ -39,14 +39,6 @@ efi_status_t efi_file_close(void *handle);
unsigned long get_dram_base(efi_system_table_t *sys_table_arg);
-efi_status_t update_fdt(efi_system_table_t *sys_table, void *orig_fdt,
- unsigned long orig_fdt_size,
- void *fdt, int new_fdt_size, char *cmdline_ptr,
- u64 initrd_addr, u64 initrd_size,
- efi_memory_desc_t *memory_map,
- unsigned long map_size, unsigned long desc_size,
- u32 desc_ver);
-
efi_status_t allocate_new_fdt_and_exit_boot(efi_system_table_t *sys_table,
void *handle,
unsigned long *new_fdt_addr,
diff --git a/drivers/firmware/efi/libstub/fdt.c b/drivers/firmware/efi/libstub/fdt.c
index a6a93116a8f0..921dfa047202 100644
--- a/drivers/firmware/efi/libstub/fdt.c
+++ b/drivers/firmware/efi/libstub/fdt.c
@@ -16,13 +16,10 @@
#include "efistub.h"
-efi_status_t update_fdt(efi_system_table_t *sys_table, void *orig_fdt,
- unsigned long orig_fdt_size,
- void *fdt, int new_fdt_size, char *cmdline_ptr,
- u64 initrd_addr, u64 initrd_size,
- efi_memory_desc_t *memory_map,
- unsigned long map_size, unsigned long desc_size,
- u32 desc_ver)
+static efi_status_t update_fdt(efi_system_table_t *sys_table, void *orig_fdt,
+ unsigned long orig_fdt_size,
+ void *fdt, int new_fdt_size, char *cmdline_ptr,
+ u64 initrd_addr, u64 initrd_size)
{
int node, num_rsv;
int status;
@@ -101,25 +98,23 @@ efi_status_t update_fdt(efi_system_table_t *sys_table, void *orig_fdt,
if (status)
goto fdt_set_fail;
- fdt_val64 = cpu_to_fdt64((u64)(unsigned long)memory_map);
+ fdt_val64 = U64_MAX; /* placeholder */
status = fdt_setprop(fdt, node, "linux,uefi-mmap-start",
&fdt_val64, sizeof(fdt_val64));
if (status)
goto fdt_set_fail;
- fdt_val32 = cpu_to_fdt32(map_size);
+ fdt_val32 = U32_MAX; /* placeholder */
status = fdt_setprop(fdt, node, "linux,uefi-mmap-size",
&fdt_val32, sizeof(fdt_val32));
if (status)
goto fdt_set_fail;
- fdt_val32 = cpu_to_fdt32(desc_size);
status = fdt_setprop(fdt, node, "linux,uefi-mmap-desc-size",
&fdt_val32, sizeof(fdt_val32));
if (status)
goto fdt_set_fail;
- fdt_val32 = cpu_to_fdt32(desc_ver);
status = fdt_setprop(fdt, node, "linux,uefi-mmap-desc-ver",
&fdt_val32, sizeof(fdt_val32));
if (status)
@@ -148,6 +143,43 @@ fdt_set_fail:
return EFI_LOAD_ERROR;
}
+static efi_status_t update_fdt_memmap(void *fdt, struct efi_boot_memmap *map)
+{
+ int node = fdt_path_offset(fdt, "/chosen");
+ u64 fdt_val64;
+ u32 fdt_val32;
+ int err;
+
+ if (node < 0)
+ return EFI_LOAD_ERROR;
+
+ fdt_val64 = cpu_to_fdt64((unsigned long)*map->map);
+ err = fdt_setprop_inplace(fdt, node, "linux,uefi-mmap-start",
+ &fdt_val64, sizeof(fdt_val64));
+ if (err)
+ return EFI_LOAD_ERROR;
+
+ fdt_val32 = cpu_to_fdt32(*map->map_size);
+ err = fdt_setprop_inplace(fdt, node, "linux,uefi-mmap-size",
+ &fdt_val32, sizeof(fdt_val32));
+ if (err)
+ return EFI_LOAD_ERROR;
+
+ fdt_val32 = cpu_to_fdt32(*map->desc_size);
+ err = fdt_setprop_inplace(fdt, node, "linux,uefi-mmap-desc-size",
+ &fdt_val32, sizeof(fdt_val32));
+ if (err)
+ return EFI_LOAD_ERROR;
+
+ fdt_val32 = cpu_to_fdt32(*map->desc_ver);
+ err = fdt_setprop_inplace(fdt, node, "linux,uefi-mmap-desc-ver",
+ &fdt_val32, sizeof(fdt_val32));
+ if (err)
+ return EFI_LOAD_ERROR;
+
+ return EFI_SUCCESS;
+}
+
#ifndef EFI_FDT_ALIGN
#define EFI_FDT_ALIGN EFI_PAGE_SIZE
#endif
@@ -243,20 +275,10 @@ efi_status_t allocate_new_fdt_and_exit_boot(efi_system_table_t *sys_table,
goto fail;
}
- /*
- * Now that we have done our final memory allocation (and free)
- * we can get the memory map key needed for
- * exit_boot_services().
- */
- status = efi_get_memory_map(sys_table, &map);
- if (status != EFI_SUCCESS)
- goto fail_free_new_fdt;
-
status = update_fdt(sys_table,
(void *)fdt_addr, fdt_size,
(void *)*new_fdt_addr, new_fdt_size,
- cmdline_ptr, initrd_addr, initrd_size,
- memory_map, map_size, desc_size, desc_ver);
+ cmdline_ptr, initrd_addr, initrd_size);
/* Succeeding the first time is the expected case. */
if (status == EFI_SUCCESS)
@@ -266,20 +288,16 @@ efi_status_t allocate_new_fdt_and_exit_boot(efi_system_table_t *sys_table,
/*
* We need to allocate more space for the new
* device tree, so free existing buffer that is
- * too small. Also free memory map, as we will need
- * to get new one that reflects the free/alloc we do
- * on the device tree buffer.
+ * too small.
*/
efi_free(sys_table, new_fdt_size, *new_fdt_addr);
- sys_table->boottime->free_pool(memory_map);
new_fdt_size += EFI_PAGE_SIZE;
} else {
pr_efi_err(sys_table, "Unable to construct new device tree.\n");
- goto fail_free_mmap;
+ goto fail_free_new_fdt;
}
}
- sys_table->boottime->free_pool(memory_map);
priv.runtime_map = runtime_map;
priv.runtime_entry_count = &runtime_entry_count;
status = efi_exit_boot_services(sys_table, handle, &map, &priv,
@@ -288,6 +306,16 @@ 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;
+ status = update_fdt_memmap((void *)*new_fdt_addr, &map);
+ if (status != EFI_SUCCESS) {
+ /*
+ * The kernel won't get far without the memory map, but
+ * may still be able to print something meaningful so
+ * return success here.
+ */
+ 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,
@@ -319,9 +347,6 @@ efi_status_t allocate_new_fdt_and_exit_boot(efi_system_table_t *sys_table,
pr_efi_err(sys_table, "Exit boot services failed.\n");
-fail_free_mmap:
- sys_table->boottime->free_pool(memory_map);
-
fail_free_new_fdt:
efi_free(sys_table, new_fdt_size, *new_fdt_addr);
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-14 18:29:59 +0300