From: Arvind Sankar <nivedita@xxxxxxxxxxxx>
Commit
22090f84bc3f ("efi/libstub: unify EFI call wrappers for non-x86")
refactored the macros that are used to provide wrappers for mixed-mode
calls on x86, allowing us to boot a 64-bit kernel on 32-bit firmware.
Unfortunately, this broke mixed mode boot due to the fact that
efi_is_native() is not a macro on x86.
All of these macros should go together, so rather than testing each one
to see if it is defined, condition the generic macro definitions on a
new ARCH_HAS_EFISTUB_WRAPPERS, and remove the wrapper definitions on x86
as well if CONFIG_EFI_MIXED is not enabled.
Fixes: 22090f84bc3f ("efi/libstub: unify EFI call wrappers for non-x86")
Reported-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Signed-off-by: Arvind Sankar <nivedita@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20200504150248.62482-1-nivedita@xxxxxxxxxxxx
Signed-off-by: Ard Biesheuvel <ardb@xxxxxxxxxx>
---
arch/x86/include/asm/efi.h | 19 +++++++++++++++----
drivers/firmware/efi/libstub/efistub.h | 14 ++++----------
2 files changed, 19 insertions(+), 14 deletions(-)
diff --git a/arch/x86/include/asm/efi.h b/arch/x86/include/asm/efi.h
index cd0c3fbf6156..6b9ab0d8b2a7 100644
--- a/arch/x86/include/asm/efi.h
+++ b/arch/x86/include/asm/efi.h
@@ -225,13 +225,15 @@ efi_status_t efi_set_virtual_address_map(unsigned long memory_map_size,
/* arch specific definitions used by the stub code */
-extern const bool efi_is64;
+#ifdef CONFIG_EFI_MIXED
+
+#define ARCH_HAS_EFISTUB_WRAPPERS
static inline bool efi_is_64bit(void)
{
- if (IS_ENABLED(CONFIG_EFI_MIXED))
- return efi_is64;
- return IS_ENABLED(CONFIG_X86_64);
+ extern const bool efi_is64;
+
+ return efi_is64;
}
static inline bool efi_is_native(void)
@@ -356,6 +358,15 @@ static inline u32 efi64_convert_status(efi_status_t status)
runtime), \
func, __VA_ARGS__))
+#else /* CONFIG_EFI_MIXED */
+
+static inline bool efi_is_64bit(void)
+{
+ return IS_ENABLED(CONFIG_X86_64);
+}
+
+#endif /* CONFIG_EFI_MIXED */
+
extern bool efi_reboot_required(void);
extern bool efi_is_table_address(unsigned long phys_addr);
diff --git a/drivers/firmware/efi/libstub/efistub.h b/drivers/firmware/efi/libstub/efistub.h
index 874233cf8820..4f10a09563f3 100644
--- a/drivers/firmware/efi/libstub/efistub.h
+++ b/drivers/firmware/efi/libstub/efistub.h
@@ -33,20 +33,14 @@ extern bool efi_novamap;
extern const efi_system_table_t *efi_system_table;
-#ifndef efi_bs_call
+#ifndef ARCH_HAS_EFISTUB_WRAPPERS
+
+#define efi_is_native() (true)
#define efi_bs_call(func, ...) efi_system_table->boottime->func(__VA_ARGS__)
-#endif
-#ifndef efi_rt_call
#define efi_rt_call(func, ...) efi_system_table->runtime->func(__VA_ARGS__)
-#endif
-#ifndef efi_is_native
-#define efi_is_native() (true)
-#endif
-#ifndef efi_table_attr
#define efi_table_attr(inst, attr) (inst->attr)
-#endif
-#ifndef efi_call_proto
#define efi_call_proto(inst, func, ...) inst->func(inst, ##__VA_ARGS__)
+
#endif
#define efi_info(msg) do { \
--
2.17.1
