OS does not always need to call SetVirtualAddressMap.
(Ard confirmed this on arm64 linux.)
So let this API configurable. If disabled, it will return EFI_UNSUPPORTED
as UEFI specification requires.
Signed-off-by: AKASHI Takahiro <takahiro.aka...@linaro.org>
---
lib/efi_loader/Kconfig | 7 +++++++
lib/efi_loader/efi_runtime.c | 8 ++++++++
2 files changed, 15 insertions(+)
diff --git a/lib/efi_loader/Kconfig b/lib/efi_loader/Kconfig
index 8bf4b1754d06..bb9c7582b14d 100644
--- a/lib/efi_loader/Kconfig
+++ b/lib/efi_loader/Kconfig
@@ -44,6 +44,13 @@ config EFI_SET_TIME
Provide the SetTime() runtime service at boottime. This service
can be used by an EFI application to adjust the real time clock.
+config EFI_RUNTIME_SET_VIRTUAL_ADDRESS_MAP
+ bool "runtime service: SetVirtualAddressMap"
+ default n
+ help
+ Enable SetVirtualAddressMap runtime service. This API will be
+ called by OS just before it enters into virtual address mode.
+
config EFI_DEVICE_PATH_TO_TEXT
bool "Device path to text protocol"
default y
diff --git a/lib/efi_loader/efi_runtime.c b/lib/efi_loader/efi_runtime.c
index 9c50955c9bd0..60442cb21d37 100644
--- a/lib/efi_loader/efi_runtime.c
+++ b/lib/efi_loader/efi_runtime.c
@@ -374,10 +374,12 @@ static const struct efi_runtime_detach_list_struct
efi_runtime_detach_list[] = {
/* do_reset is gone */
.ptr = &efi_runtime_services.reset_system,
.patchto = efi_reset_system,
+#ifdef CONFIG_RUNTIME_SET_VIRTUAL_ADDRESS_MAP
}, {
/* invalidate_*cache_all are gone */
.ptr = &efi_runtime_services.set_virtual_address_map,
.patchto = &efi_unimplemented,
+#endif
}, {
/* RTC accessors are gone */
.ptr = &efi_runtime_services.get_time,
@@ -512,6 +514,7 @@ void efi_runtime_relocate(ulong offset, struct efi_mem_desc
*map)
invalidate_icache_all();
}
+#ifdef CONFIG_RUNTIME_SET_VIRTUAL_ADDRESS_MAP
/**
* efi_set_virtual_address_map() - change from physical to virtual mapping
*
@@ -619,6 +622,7 @@ static efi_status_t EFIAPI efi_set_virtual_address_map(
return EFI_EXIT(EFI_INVALID_PARAMETER);
}
+#endif /* CONFIG_RUNTIME_SET_VIRTUAL_ADDRESS_MAP */
/**
* efi_add_runtime_mmio() - add memory-mapped IO region
@@ -796,7 +800,11 @@ struct efi_runtime_services __efi_runtime_data
efi_runtime_services = {
.set_time = &efi_set_time_boottime,
.get_wakeup_time = (void *)&efi_unimplemented,
.set_wakeup_time = (void *)&efi_unimplemented,
+#ifdef CONFIG_RUNTIME_SET_VIRTUAL_ADDRESS_MAP
.set_virtual_address_map = &efi_set_virtual_address_map,
+#else
+ .set_virtual_address_map = (void *)&efi_unimplemented,
+#endif
.convert_pointer = (void *)&efi_invalid_parameter,
.get_variable = efi_get_variable,
.get_next_variable_name = efi_get_next_variable_name,
--
2.21.0
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