From: Evgeniy Baskov <baskov@xxxxxxxxx>
[ Commit 79729f26b074a5d2722c27fa76cc45ef721e65cd upstream ]
EFI_MEMORY_ATTRIBUTE_PROTOCOL servers as a better alternative to
DXE services for setting memory attributes in EFI Boot Services
environment. This protocol is better since it is a part of UEFI
specification itself and not UEFI PI specification like DXE
services.
Add EFI_MEMORY_ATTRIBUTE_PROTOCOL definitions.
Support mixed mode properly for its calls.
Tested-by: Mario Limonciello <mario.limonciello@xxxxxxx>
Signed-off-by: Evgeniy Baskov <baskov@xxxxxxxxx>
Signed-off-by: Ard Biesheuvel <ardb@xxxxxxxxxx>
---
arch/x86/include/asm/efi.h | 7 +++++++
drivers/firmware/efi/libstub/efistub.h | 20 ++++++++++++++++++++
include/linux/efi.h | 1 +
3 files changed, 28 insertions(+)
diff --git a/arch/x86/include/asm/efi.h b/arch/x86/include/asm/efi.h
index 233ae6986d6f..522ff2e443b3 100644
--- a/arch/x86/include/asm/efi.h
+++ b/arch/x86/include/asm/efi.h
@@ -325,6 +325,13 @@ static inline u32 efi64_convert_status(efi_status_t status)
#define __efi64_argmap_set_memory_space_attributes(phys, size, flags) \
(__efi64_split(phys), __efi64_split(size), __efi64_split(flags))
+/* Memory Attribute Protocol */
+#define __efi64_argmap_set_memory_attributes(protocol, phys, size, flags) \
+ ((protocol), __efi64_split(phys), __efi64_split(size), __efi64_split(flags))
+
+#define __efi64_argmap_clear_memory_attributes(protocol, phys, size, flags) \
+ ((protocol), __efi64_split(phys), __efi64_split(size), __efi64_split(flags))
+
/*
* The macros below handle the plumbing for the argument mapping. To add a
* mapping for a specific EFI method, simply define a macro
diff --git a/drivers/firmware/efi/libstub/efistub.h b/drivers/firmware/efi/libstub/efistub.h
index 002f02a6d359..6f5a1a16db15 100644
--- a/drivers/firmware/efi/libstub/efistub.h
+++ b/drivers/firmware/efi/libstub/efistub.h
@@ -419,6 +419,26 @@ union efi_dxe_services_table {
} mixed_mode;
};
+typedef union efi_memory_attribute_protocol efi_memory_attribute_protocol_t;
+
+union efi_memory_attribute_protocol {
+ struct {
+ efi_status_t (__efiapi *get_memory_attributes)(
+ efi_memory_attribute_protocol_t *, efi_physical_addr_t, u64, u64 *);
+
+ efi_status_t (__efiapi *set_memory_attributes)(
+ efi_memory_attribute_protocol_t *, efi_physical_addr_t, u64, u64);
+
+ efi_status_t (__efiapi *clear_memory_attributes)(
+ efi_memory_attribute_protocol_t *, efi_physical_addr_t, u64, u64);
+ };
+ struct {
+ u32 get_memory_attributes;
+ u32 set_memory_attributes;
+ u32 clear_memory_attributes;
+ } mixed_mode;
+};
+
typedef union efi_uga_draw_protocol efi_uga_draw_protocol_t;
union efi_uga_draw_protocol {
diff --git a/include/linux/efi.h b/include/linux/efi.h
index 4e1bfee9675d..de6d6558a4d3 100644
--- a/include/linux/efi.h
+++ b/include/linux/efi.h
@@ -390,6 +390,7 @@ void efi_native_runtime_setup(void);
#define EFI_RT_PROPERTIES_TABLE_GUID EFI_GUID(0xeb66918a, 0x7eef, 0x402a, 0x84, 0x2e, 0x93, 0x1d, 0x21, 0xc3, 0x8a, 0xe9)
#define EFI_DXE_SERVICES_TABLE_GUID EFI_GUID(0x05ad34ba, 0x6f02, 0x4214, 0x95, 0x2e, 0x4d, 0xa0, 0x39, 0x8e, 0x2b, 0xb9)
#define EFI_SMBIOS_PROTOCOL_GUID EFI_GUID(0x03583ff6, 0xcb36, 0x4940, 0x94, 0x7e, 0xb9, 0xb3, 0x9f, 0x4a, 0xfa, 0xf7)
+#define EFI_MEMORY_ATTRIBUTE_PROTOCOL_GUID EFI_GUID(0xf4560cf6, 0x40ec, 0x4b4a, 0xa1, 0x92, 0xbf, 0x1d, 0x57, 0xd0, 0xb1, 0x89)
#define EFI_IMAGE_SECURITY_DATABASE_GUID EFI_GUID(0xd719b2cb, 0x3d3a, 0x4596, 0xa3, 0xbc, 0xda, 0xd0, 0x0e, 0x67, 0x65, 0x6f)
#define EFI_SHIM_LOCK_GUID EFI_GUID(0x605dab50, 0xe046, 0x4300, 0xab, 0xb6, 0x3d, 0xd8, 0x10, 0xdd, 0x8b, 0x23)
--
2.44.0.278.ge034bb2e1d-goog
