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linux/debian/patches/bugfix/arm64/efi-libstub-arm-pass-latest...

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From 1816e2e5003836a142056957f7a813d846eba992 Mon Sep 17 00:00:00 2001
From: Riku Voipio <riku.voipio@linaro.org>
Date: Wed, 1 Feb 2017 13:37:49 +0200
Subject: [PATCH] Revert "efi/libstub/arm*: Pass latest memory map to the
kernel"
This reverts commit 74ce3fd64bc44f89856ff57bf684882dc098f93b.
---
drivers/firmware/efi/libstub/efistub.h | 8 ++++
drivers/firmware/efi/libstub/fdt.c | 87 ++++++++++++----------------------
2 files changed, 39 insertions(+), 56 deletions(-)
diff --git a/drivers/firmware/efi/libstub/efistub.h b/drivers/firmware/efi/libstub/efistub.h
index fac67992bede..ee49cd23ee63 100644
--- a/drivers/firmware/efi/libstub/efistub.h
+++ b/drivers/firmware/efi/libstub/efistub.h
@@ -30,6 +30,14 @@ 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 921dfa047202..a6a93116a8f0 100644
--- a/drivers/firmware/efi/libstub/fdt.c
+++ b/drivers/firmware/efi/libstub/fdt.c
@@ -16,10 +16,13 @@
#include "efistub.h"
-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)
+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)
{
int node, num_rsv;
int status;
@@ -98,23 +101,25 @@ static efi_status_t update_fdt(efi_system_table_t *sys_table, void *orig_fdt,
if (status)
goto fdt_set_fail;
- fdt_val64 = U64_MAX; /* placeholder */
+ fdt_val64 = cpu_to_fdt64((u64)(unsigned long)memory_map);
status = fdt_setprop(fdt, node, "linux,uefi-mmap-start",
&fdt_val64, sizeof(fdt_val64));
if (status)
goto fdt_set_fail;
- fdt_val32 = U32_MAX; /* placeholder */
+ fdt_val32 = cpu_to_fdt32(map_size);
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)
@@ -143,43 +148,6 @@ static efi_status_t update_fdt(efi_system_table_t *sys_table, void *orig_fdt,
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
@@ -275,10 +243,20 @@ 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);
+ cmdline_ptr, initrd_addr, initrd_size,
+ memory_map, map_size, desc_size, desc_ver);
/* Succeeding the first time is the expected case. */
if (status == EFI_SUCCESS)
@@ -288,16 +266,20 @@ 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.
+ * 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.
*/
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_new_fdt;
+ goto fail_free_mmap;
}
}
+ 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,
@@ -306,16 +288,6 @@ 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,
@@ -347,6 +319,9 @@ 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);
--
2.11.0
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