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efi/arm: libstub: add a root memreserve config table

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Installing UEFI configuration tables can only be done before calling
ExitBootServices(), so if we want to use the new MEMRESRVE config table
from the kernel proper, we need to install a dummy entry from the stub.

Tested-by: Jeremy Linton <jeremy.linton@arm.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
This commit is contained in:
Ard Biesheuvel 2018-09-21 09:32:45 -07:00
parent 71e0940d52
commit b844470f22
1 changed files with 27 additions and 0 deletions
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27
drivers/firmware/efi/libstub/arm-stub.c
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@ -69,6 +69,31 @@ static struct screen_info *setup_graphics(efi_system_table_t *sys_table_arg)
return si;
}
void install_memreserve_table(efi_system_table_t *sys_table_arg)
{
struct linux_efi_memreserve *rsv;
efi_guid_t memreserve_table_guid = LINUX_EFI_MEMRESERVE_TABLE_GUID;
efi_status_t status;
status = efi_call_early(allocate_pool, EFI_LOADER_DATA, sizeof(*rsv),
(void **)&rsv);
if (status != EFI_SUCCESS) {
pr_efi_err(sys_table_arg, "Failed to allocate memreserve entry!\n");
return;
}
rsv->next = 0;
rsv->base = 0;
rsv->size = 0;
status = efi_call_early(install_configuration_table,
&memreserve_table_guid,
rsv);
if (status != EFI_SUCCESS)
pr_efi_err(sys_table_arg, "Failed to install memreserve config table!\n");
}
/*
* This function handles the architcture specific differences between arm and
* arm64 regarding where the kernel image must be loaded and any memory that
@ -235,6 +260,8 @@ unsigned long efi_entry(void *handle, efi_system_table_t *sys_table,
}
}
install_memreserve_table(sys_table);
new_fdt_addr = fdt_addr;
status = allocate_new_fdt_and_exit_boot(sys_table, handle,
&new_fdt_addr, efi_get_max_fdt_addr(dram_base),