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    Subject[PATCH v4 22/26] efi/libstub: Add memory attribute protocol definitions
    Date
    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@amd.com>
    Tested-by: Peter Jones <pjones@redhat.com>
    Signed-off-by: Evgeniy Baskov <baskov@ispras.ru>
    ---
    arch/x86/include/asm/efi.h | 7 +++++++
    drivers/firmware/efi/libstub/efistub.h | 22 ++++++++++++++++++++++
    include/linux/efi.h | 1 +
    3 files changed, 30 insertions(+)

    diff --git a/arch/x86/include/asm/efi.h b/arch/x86/include/asm/efi.h
    index a63154e049d7..cd19b9eca3f6 100644
    --- a/arch/x86/include/asm/efi.h
    +++ b/arch/x86/include/asm/efi.h
    @@ -335,6 +335,13 @@ static inline u32 efi64_convert_status(efi_status_t status)
    #define __efi64_argmap_open_volume(prot, file) \
    ((prot), efi64_zero_upper(file))

    +/* 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 c55325f829e7..cd8a7b089b7d 100644
    --- a/drivers/firmware/efi/libstub/efistub.h
    +++ b/drivers/firmware/efi/libstub/efistub.h
    @@ -43,6 +43,9 @@ extern const efi_system_table_t *efi_system_table;
    typedef union efi_dxe_services_table efi_dxe_services_table_t;
    extern const efi_dxe_services_table_t *efi_dxe_table;

    +typedef union efi_memory_attribute_protocol efi_memory_attribute_protocol_t;
    +extern efi_memory_attribute_protocol_t *efi_mem_attrib_proto;
    +
    efi_status_t __efiapi efi_pe_entry(efi_handle_t handle,
    efi_system_table_t *sys_table_arg);

    @@ -442,6 +445,25 @@ union efi_dxe_services_table {
    } mixed_mode;
    };

    +union efi_memory_attribute_protocol {
    + struct {
    + void *get_memory_attributes;
    + 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 4b27519143f5..8a333d993829 100644
    --- a/include/linux/efi.h
    +++ b/include/linux/efi.h
    @@ -391,6 +391,7 @@ 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)
    --
    2.37.4
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