Merge tag 'efi-next-for-v6.8' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi
Merge commit. Changes below are compared with the first parent: 7c6a3fc9.
Changes
19 files changed · +987 −33
Only the first 600 diff lines are shown. Download the complete patch.
arch/loongarch/include/asm/efi.h
View filediff --git a/arch/loongarch/include/asm/efi.h b/arch/loongarch/include/asm/efi.h
index 91d81f9..eddc8e7 100644
--- a/arch/loongarch/include/asm/efi.h
+++ b/arch/loongarch/include/asm/efi.h
@@ -32,6 +32,4 @@ static inline unsigned long efi_get_kimg_min_align(void)
#define EFI_KIMG_PREFERRED_ADDRESS PHYSADDR(VMLINUX_LOAD_ADDRESS)
-unsigned long kernel_entry_address(unsigned long kernel_addr);
-
#endif /* _ASM_LOONGARCH_EFI_H */
arch/loongarch/kernel/head.S
View filediff --git a/arch/loongarch/kernel/head.S b/arch/loongarch/kernel/head.S
index 53b883d..0ecab42 100644
--- a/arch/loongarch/kernel/head.S
+++ b/arch/loongarch/kernel/head.S
@@ -34,7 +34,6 @@ pe_header:
SYM_DATA(kernel_asize, .long _kernel_asize);
SYM_DATA(kernel_fsize, .long _kernel_fsize);
-SYM_DATA(kernel_offset, .long _kernel_offset);
#endif
arch/loongarch/kernel/image-vars.h
View filediff --git a/arch/loongarch/kernel/image-vars.h b/arch/loongarch/kernel/image-vars.h
index 5087416..41ddcf5 100644
--- a/arch/loongarch/kernel/image-vars.h
+++ b/arch/loongarch/kernel/image-vars.h
@@ -11,7 +11,6 @@ __efistub_strcmp = strcmp;
__efistub_kernel_entry = kernel_entry;
__efistub_kernel_asize = kernel_asize;
__efistub_kernel_fsize = kernel_fsize;
-__efistub_kernel_offset = kernel_offset;
#if defined(CONFIG_EFI_EARLYCON) || defined(CONFIG_SYSFB)
__efistub_screen_info = screen_info;
#endif
arch/loongarch/kernel/vmlinux.lds.S
View filediff --git a/arch/loongarch/kernel/vmlinux.lds.S b/arch/loongarch/kernel/vmlinux.lds.S
index bb2ec86..a5d0cd2 100644
--- a/arch/loongarch/kernel/vmlinux.lds.S
+++ b/arch/loongarch/kernel/vmlinux.lds.S
@@ -143,7 +143,6 @@ SECTIONS
_kernel_fsize = _edata - _text;
_kernel_vsize = _end - __initdata_begin;
_kernel_rsize = _edata - __initdata_begin;
- _kernel_offset = kernel_offset - _text;
#endif
.gptab.sdata : {
drivers/firmware/efi/Kconfig
View filediff --git a/drivers/firmware/efi/Kconfig b/drivers/firmware/efi/Kconfig
index cb374b2..72f2537 100644
--- a/drivers/firmware/efi/Kconfig
+++ b/drivers/firmware/efi/Kconfig
@@ -301,3 +301,18 @@ config UEFI_CPER_X86
bool
depends on UEFI_CPER && X86
default y
+
+config TEE_STMM_EFI
+ tristate "TEE-based EFI runtime variable service driver"
+ depends on EFI && OPTEE
+ help
+ Select this config option if TEE is compiled to include StandAloneMM
+ as a separate secure partition. It has the ability to check and store
+ EFI variables on an RPMB or any other non-volatile medium used by
+ StandAloneMM.
+
+ Enabling this will change the EFI runtime services from the firmware
+ provided functions to TEE calls.
+
+ To compile this driver as a module, choose M here: the module
+ will be called tee_stmm_efi.
drivers/firmware/efi/Makefile
View filediff --git a/drivers/firmware/efi/Makefile b/drivers/firmware/efi/Makefile
index e489fef..a2d0009 100644
--- a/drivers/firmware/efi/Makefile
+++ b/drivers/firmware/efi/Makefile
@@ -42,3 +42,4 @@ obj-$(CONFIG_EFI_EARLYCON) += earlycon.o
obj-$(CONFIG_UEFI_CPER_ARM) += cper-arm.o
obj-$(CONFIG_UEFI_CPER_X86) += cper-x86.o
obj-$(CONFIG_UNACCEPTED_MEMORY) += unaccepted_memory.o
+obj-$(CONFIG_TEE_STMM_EFI) += stmm/tee_stmm_efi.o
drivers/firmware/efi/efi.c
View filediff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c
index 9d3910d..4fcda50 100644
--- a/drivers/firmware/efi/efi.c
+++ b/drivers/firmware/efi/efi.c
@@ -32,6 +32,7 @@
#include <linux/ucs2_string.h>
#include <linux/memblock.h>
#include <linux/security.h>
+#include <linux/notifier.h>
#include <asm/early_ioremap.h>
@@ -187,6 +188,9 @@ static const struct attribute_group efi_subsys_attr_group = {
.is_visible = efi_attr_is_visible,
};
+struct blocking_notifier_head efivar_ops_nh;
+EXPORT_SYMBOL_GPL(efivar_ops_nh);
+
static struct efivars generic_efivars;
static struct efivar_operations generic_ops;
@@ -231,6 +235,18 @@ static void generic_ops_unregister(void)
efivars_unregister(&generic_efivars);
}
+void efivars_generic_ops_register(void)
+{
+ generic_ops_register();
+}
+EXPORT_SYMBOL_GPL(efivars_generic_ops_register);
+
+void efivars_generic_ops_unregister(void)
+{
+ generic_ops_unregister();
+}
+EXPORT_SYMBOL_GPL(efivars_generic_ops_unregister);
+
#ifdef CONFIG_EFI_CUSTOM_SSDT_OVERLAYS
#define EFIVAR_SSDT_NAME_MAX 16UL
static char efivar_ssdt[EFIVAR_SSDT_NAME_MAX] __initdata;
@@ -419,6 +435,8 @@ static int __init efisubsys_init(void)
platform_device_register_simple("efivars", 0, NULL, 0);
}
+ BLOCKING_INIT_NOTIFIER_HEAD(&efivar_ops_nh);
+
error = sysfs_create_group(efi_kobj, &efi_subsys_attr_group);
if (error) {
pr_err("efi: Sysfs attribute export failed with error %d.\n",
drivers/firmware/efi/libstub/loongarch-stub.c
View filediff --git a/drivers/firmware/efi/libstub/loongarch-stub.c b/drivers/firmware/efi/libstub/loongarch-stub.c
index d6ec5d4..736b6aa 100644
--- a/drivers/firmware/efi/libstub/loongarch-stub.c
+++ b/drivers/firmware/efi/libstub/loongarch-stub.c
@@ -8,10 +8,10 @@
#include <asm/efi.h>
#include <asm/addrspace.h>
#include "efistub.h"
+#include "loongarch-stub.h"
extern int kernel_asize;
extern int kernel_fsize;
-extern int kernel_offset;
extern int kernel_entry;
efi_status_t handle_kernel_image(unsigned long *image_addr,
@@ -24,7 +24,7 @@ efi_status_t handle_kernel_image(unsigned long *image_addr,
efi_status_t status;
unsigned long kernel_addr = 0;
- kernel_addr = (unsigned long)&kernel_offset - kernel_offset;
+ kernel_addr = (unsigned long)image->image_base;
status = efi_relocate_kernel(&kernel_addr, kernel_fsize, kernel_asize,
EFI_KIMG_PREFERRED_ADDRESS, efi_get_kimg_min_align(), 0x0);
@@ -35,9 +35,10 @@ efi_status_t handle_kernel_image(unsigned long *image_addr,
return status;
}
-unsigned long kernel_entry_address(unsigned long kernel_addr)
+unsigned long kernel_entry_address(unsigned long kernel_addr,
+ efi_loaded_image_t *image)
{
- unsigned long base = (unsigned long)&kernel_offset - kernel_offset;
+ unsigned long base = (unsigned long)image->image_base;
return (unsigned long)&kernel_entry - base + kernel_addr;
}
drivers/firmware/efi/libstub/loongarch-stub.h
View filediff --git a/drivers/firmware/efi/libstub/loongarch-stub.h b/drivers/firmware/efi/libstub/loongarch-stub.h
new file mode 100644
index 0000000..cd01595
--- /dev/null
+++ b/drivers/firmware/efi/libstub/loongarch-stub.h
@@ -0,0 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+unsigned long kernel_entry_address(unsigned long kernel_addr,
+ efi_loaded_image_t *image);
drivers/firmware/efi/libstub/loongarch.c
View filediff --git a/drivers/firmware/efi/libstub/loongarch.c b/drivers/firmware/efi/libstub/loongarch.c
index 0e0aa6c..684c935 100644
--- a/drivers/firmware/efi/libstub/loongarch.c
+++ b/drivers/firmware/efi/libstub/loongarch.c
@@ -8,6 +8,7 @@
#include <asm/efi.h>
#include <asm/addrspace.h>
#include "efistub.h"
+#include "loongarch-stub.h"
typedef void __noreturn (*kernel_entry_t)(bool efi, unsigned long cmdline,
unsigned long systab);
@@ -37,7 +38,8 @@ static efi_status_t exit_boot_func(struct efi_boot_memmap *map, void *priv)
return EFI_SUCCESS;
}
-unsigned long __weak kernel_entry_address(unsigned long kernel_addr)
+unsigned long __weak kernel_entry_address(unsigned long kernel_addr,
+ efi_loaded_image_t *image)
{
return *(unsigned long *)(kernel_addr + 8) - VMLINUX_LOAD_ADDRESS + kernel_addr;
}
@@ -73,7 +75,7 @@ efi_status_t efi_boot_kernel(void *handle, efi_loaded_image_t *image,
csr_write64(CSR_DMW0_INIT, LOONGARCH_CSR_DMWIN0);
csr_write64(CSR_DMW1_INIT, LOONGARCH_CSR_DMWIN1);
- real_kernel_entry = (void *)kernel_entry_address(kernel_addr);
+ real_kernel_entry = (void *)kernel_entry_address(kernel_addr, image);
real_kernel_entry(true, (unsigned long)cmdline_ptr,
(unsigned long)efi_system_table);
drivers/firmware/efi/memmap.c
View filediff --git a/drivers/firmware/efi/memmap.c b/drivers/firmware/efi/memmap.c
index a118046..3365944 100644
--- a/drivers/firmware/efi/memmap.c
+++ b/drivers/firmware/efi/memmap.c
@@ -32,7 +32,7 @@
* space isn't setup. Once the kernel is fully booted we can fallback
* to the more robust memremap*() API.
*
- * Returns zero on success, a negative error code on failure.
+ * Returns: zero on success, a negative error code on failure.
*/
int __init __efi_memmap_init(struct efi_memory_map_data *data)
{
@@ -77,6 +77,8 @@ int __init __efi_memmap_init(struct efi_memory_map_data *data)
*
* Use early_memremap() to map the passed in EFI memory map and assign
* it to efi.memmap.
+ *
+ * Returns: zero on success, a negative error code on failure.
*/
int __init efi_memmap_init_early(struct efi_memory_map_data *data)
{
@@ -107,7 +109,7 @@ void __init efi_memmap_unmap(void)
/**
* efi_memmap_init_late - Map efi.memmap with memremap()
- * @phys_addr: Physical address of the new EFI memory map
+ * @addr: Physical address of the new EFI memory map
* @size: Size in bytes of the new EFI memory map
*
* Setup a mapping of the EFI memory map using ioremap_cache(). This
@@ -126,7 +128,7 @@ void __init efi_memmap_unmap(void)
* runtime so that things like efi_mem_desc_lookup() and
* efi_mem_attributes() always work.
*
- * Returns zero on success, a negative error code on failure.
+ * Returns: zero on success, a negative error code on failure.
*/
int __init efi_memmap_init_late(phys_addr_t addr, unsigned long size)
{
drivers/firmware/efi/stmm/mm_communication.h
View filediff --git a/drivers/firmware/efi/stmm/mm_communication.h b/drivers/firmware/efi/stmm/mm_communication.h
new file mode 100644
index 0000000..52a1f32
--- /dev/null
+++ b/drivers/firmware/efi/stmm/mm_communication.h
@@ -0,0 +1,236 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Headers for EFI variable service via StandAloneMM, EDK2 application running
+ * in OP-TEE. Most of the structs and defines resemble the EDK2 naming.
+ *
+ * Copyright (c) 2017, Intel Corporation. All rights reserved.
+ * Copyright (C) 2020 Linaro Ltd.
+ */
+
+#ifndef _MM_COMMUNICATION_H_
+#define _MM_COMMUNICATION_H_
+
+/*
+ * Interface to the pseudo Trusted Application (TA), which provides a
+ * communication channel with the Standalone MM (Management Mode)
+ * Secure Partition running at Secure-EL0
+ */
+
+#define PTA_STMM_CMD_COMMUNICATE 0
+
+/*
+ * Defined in OP-TEE, this UUID is used to identify the pseudo-TA.
+ * OP-TEE is using big endian GUIDs while UEFI uses little endian ones
+ */
+#define PTA_STMM_UUID \
+ UUID_INIT(0xed32d533, 0x99e6, 0x4209, \
+ 0x9c, 0xc0, 0x2d, 0x72, 0xcd, 0xd9, 0x98, 0xa7)
+
+#define EFI_MM_VARIABLE_GUID \
+ EFI_GUID(0xed32d533, 0x99e6, 0x4209, \
+ 0x9c, 0xc0, 0x2d, 0x72, 0xcd, 0xd9, 0x98, 0xa7)
+
+/**
+ * struct efi_mm_communicate_header - Header used for SMM variable communication
+
+ * @header_guid: header use for disambiguation of content
+ * @message_len: length of the message. Does not include the size of the
+ * header
+ * @data: payload of the message
+ *
+ * Defined in the PI spec as EFI_MM_COMMUNICATE_HEADER.
+ * To avoid confusion in interpreting frames, the communication buffer should
+ * always begin with efi_mm_communicate_header.
+ */
+struct efi_mm_communicate_header {
+ efi_guid_t header_guid;
+ size_t message_len;
+ u8 data[];
+} __packed;
+
+#define MM_COMMUNICATE_HEADER_SIZE \
+ (sizeof(struct efi_mm_communicate_header))
+
+/* SPM return error codes */
+#define ARM_SVC_SPM_RET_SUCCESS 0
+#define ARM_SVC_SPM_RET_NOT_SUPPORTED -1
+#define ARM_SVC_SPM_RET_INVALID_PARAMS -2
+#define ARM_SVC_SPM_RET_DENIED -3
+#define ARM_SVC_SPM_RET_NO_MEMORY -5
+
+#define SMM_VARIABLE_FUNCTION_GET_VARIABLE 1
+/*
+ * The payload for this function is
+ * SMM_VARIABLE_COMMUNICATE_GET_NEXT_VARIABLE_NAME.
+ */
+#define SMM_VARIABLE_FUNCTION_GET_NEXT_VARIABLE_NAME 2
+/*
+ * The payload for this function is SMM_VARIABLE_COMMUNICATE_ACCESS_VARIABLE.
+ */
+#define SMM_VARIABLE_FUNCTION_SET_VARIABLE 3
+/*
+ * The payload for this function is
+ * SMM_VARIABLE_COMMUNICATE_QUERY_VARIABLE_INFO.
+ */
+#define SMM_VARIABLE_FUNCTION_QUERY_VARIABLE_INFO 4
+/*
+ * It is a notify event, no extra payload for this function.
+ */
+#define SMM_VARIABLE_FUNCTION_READY_TO_BOOT 5
+/*
+ * It is a notify event, no extra payload for this function.
+ */
+#define SMM_VARIABLE_FUNCTION_EXIT_BOOT_SERVICE 6
+/*
+ * The payload for this function is VARIABLE_INFO_ENTRY.
+ * The GUID in EFI_SMM_COMMUNICATE_HEADER is gEfiSmmVariableProtocolGuid.
+ */
+#define SMM_VARIABLE_FUNCTION_GET_STATISTICS 7
+/*
+ * The payload for this function is SMM_VARIABLE_COMMUNICATE_LOCK_VARIABLE
+ */
+#define SMM_VARIABLE_FUNCTION_LOCK_VARIABLE 8
+
+#define SMM_VARIABLE_FUNCTION_VAR_CHECK_VARIABLE_PROPERTY_SET 9
+
+#define SMM_VARIABLE_FUNCTION_VAR_CHECK_VARIABLE_PROPERTY_GET 10
+
+#define SMM_VARIABLE_FUNCTION_GET_PAYLOAD_SIZE 11
+/*
+ * The payload for this function is
+ * SMM_VARIABLE_COMMUNICATE_RUNTIME_VARIABLE_CACHE_CONTEXT
+ */
+#define SMM_VARIABLE_FUNCTION_INIT_RUNTIME_VARIABLE_CACHE_CONTEXT 12
+
+#define SMM_VARIABLE_FUNCTION_SYNC_RUNTIME_CACHE 13
+/*
+ * The payload for this function is
+ * SMM_VARIABLE_COMMUNICATE_GET_RUNTIME_CACHE_INFO
+ */
+#define SMM_VARIABLE_FUNCTION_GET_RUNTIME_CACHE_INFO 14
+
+/**
+ * struct smm_variable_communicate_header - Used for SMM variable communication
+
+ * @function: function to call in Smm.
+ * @ret_status: return status
+ * @data: payload
+ */
+struct smm_variable_communicate_header {
+ size_t function;
+ efi_status_t ret_status;
+ u8 data[];
+};
+
+#define MM_VARIABLE_COMMUNICATE_SIZE \
+ (sizeof(struct smm_variable_communicate_header))
+
+/**
+ * struct smm_variable_access - Used to communicate with StMM by
+ * SetVariable and GetVariable.
+
+ * @guid: vendor GUID
+ * @data_size: size of EFI variable data
+ * @name_size: size of EFI name
+ * @attr: attributes
+ * @name: variable name
+ *
+ */
+struct smm_variable_access {
+ efi_guid_t guid;
+ size_t data_size;
+ size_t name_size;
+ u32 attr;
+ u16 name[];
+};
+
+#define MM_VARIABLE_ACCESS_HEADER_SIZE \
+ (sizeof(struct smm_variable_access))
+/**
+ * struct smm_variable_payload_size - Used to get the max allowed
+ * payload used in StMM.
+ *
+ * @size: size to fill in
+ *
+ */
+struct smm_variable_payload_size {
+ size_t size;
+};
+
+/**
+ * struct smm_variable_getnext - Used to communicate with StMM for
+ * GetNextVariableName.
+ *
+ * @guid: vendor GUID
+ * @name_size: size of the name of the variable
+ * @name: variable name
+ *
+ */
+struct smm_variable_getnext {
+ efi_guid_t guid;
+ size_t name_size;
+ u16 name[];
+};
+
+#define MM_VARIABLE_GET_NEXT_HEADER_SIZE \
+ (sizeof(struct smm_variable_getnext))
+
+/**
+ * struct smm_variable_query_info - Used to communicate with StMM for
+ * QueryVariableInfo.
+ *
+ * @max_variable_storage: max available storage
+ * @remaining_variable_storage: remaining available storage
+ * @max_variable_size: max variable supported size
+ * @attr: attributes to query storage for
+ *
+ */
+struct smm_variable_query_info {
+ u64 max_variable_storage;
+ u64 remaining_variable_storage;
+ u64 max_variable_size;
+ u32 attr;
+};
+
+#define VAR_CHECK_VARIABLE_PROPERTY_REVISION 0x0001
+#define VAR_CHECK_VARIABLE_PROPERTY_READ_ONLY BIT(0)
+/**
+ * struct var_check_property - Used to store variable properties in StMM
+ *
+ * @revision: magic revision number for variable property checking
+ * @property: properties mask for the variable used in StMM.
+ * Currently RO flag is supported
+ * @attributes: variable attributes used in StMM checking when properties
+ * for a variable are enabled
+ * @minsize: minimum allowed size for variable payload checked against
+ * smm_variable_access->datasize in StMM
+ * @maxsize: maximum allowed size for variable payload checked against
+ * smm_variable_access->datasize in StMM
+ *
+ */
+struct var_check_property {
+ u16 revision;
+ u16 property;
+ u32 attributes;
+ size_t minsize;
+ size_t maxsize;
+};
+
+/**
+ * struct smm_variable_var_check_property - Used to communicate variable
+ * properties with StMM
+ *
+ * @guid: vendor GUID
+ * @name_size: size of EFI name
+ * @property: variable properties struct
+ * @name: variable name
+ *
+ */
+struct smm_variable_var_check_property {
+ efi_guid_t guid;
+ size_t name_size;
+ struct var_check_property property;
+ u16 name[];
+};
+
+#endif /* _MM_COMMUNICATION_H_ */
drivers/firmware/efi/stmm/tee_stmm_efi.c
View filediff --git a/drivers/firmware/efi/stmm/tee_stmm_efi.c b/drivers/firmware/efi/stmm/tee_stmm_efi.c
new file mode 100644
index 0000000..f741ca2
--- /dev/null
+++ b/drivers/firmware/efi/stmm/tee_stmm_efi.c
@@ -0,0 +1,616 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * EFI variable service via TEE
+ *
+ * Copyright (C) 2022 Linaro
+ */
+
+#include <linux/efi.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/tee.h>
+#include <linux/tee_drv.h>
+#include <linux/ucs2_string.h>
+#include "mm_communication.h"
+
+static struct efivars tee_efivars;
+static struct efivar_operations tee_efivar_ops;
+
+static size_t max_buffer_size; /* comm + var + func + data */
+static size_t max_payload_size; /* func + data */
+
+struct tee_stmm_efi_private {
+ struct tee_context *ctx;
+ u32 session;
+ struct device *dev;
+};
+
+static struct tee_stmm_efi_private pvt_data;
+
+/* UUID of the stmm PTA */
+static const struct tee_client_device_id tee_stmm_efi_id_table[] = {
+ {PTA_STMM_UUID},
+ {}
+};
+
+static int tee_ctx_match(struct tee_ioctl_version_data *ver, const void *data)
+{
+ /* currently only OP-TEE is supported as a communication path */
+ if (ver->impl_id == TEE_IMPL_ID_OPTEE)
+ return 1;
+ else
+ return 0;
+}
+
+/**
+ * tee_mm_communicate() - Pass a buffer to StandaloneMM running in TEE
+ *
+ * @comm_buf: locally allocated communication buffer
+ * @dsize: buffer size
+ * Return: status code
+ */
+static efi_status_t tee_mm_communicate(void *comm_buf, size_t dsize)
+{
+ size_t buf_size;
+ struct efi_mm_communicate_header *mm_hdr;
+ struct tee_ioctl_invoke_arg arg;
+ struct tee_param param[4];
+ struct tee_shm *shm = NULL;
+ int rc;
+
+ if (!comm_buf)
+ return EFI_INVALID_PARAMETER;
+
+ mm_hdr = (struct efi_mm_communicate_header *)comm_buf;
+ buf_size = mm_hdr->message_len + sizeof(efi_guid_t) + sizeof(size_t);
+
+ if (dsize != buf_size)
+ return EFI_INVALID_PARAMETER;
+
+ shm = tee_shm_register_kernel_buf(pvt_data.ctx, comm_buf, buf_size);
+ if (IS_ERR(shm)) {
+ dev_err(pvt_data.dev, "Unable to register shared memory\n");
+ return EFI_UNSUPPORTED;
+ }
+
+ memset(&arg, 0, sizeof(arg));
+ arg.func = PTA_STMM_CMD_COMMUNICATE;
+ arg.session = pvt_data.session;
+ arg.num_params = 4;
+
+ memset(param, 0, sizeof(param));
+ param[0].attr = TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INOUT;
+ param[0].u.memref.size = buf_size;
+ param[0].u.memref.shm = shm;
+ param[1].attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_OUTPUT;
+ param[2].attr = TEE_IOCTL_PARAM_ATTR_TYPE_NONE;
+ param[3].attr = TEE_IOCTL_PARAM_ATTR_TYPE_NONE;
+
+ rc = tee_client_invoke_func(pvt_data.ctx, &arg, param);
+ tee_shm_free(shm);
+
+ if (rc < 0 || arg.ret != 0) {
+ dev_err(pvt_data.dev,
+ "PTA_STMM_CMD_COMMUNICATE invoke error: 0x%x\n", arg.ret);
+ return EFI_DEVICE_ERROR;
+ }
+
+ switch (param[1].u.value.a) {
+ case ARM_SVC_SPM_RET_SUCCESS:
+ return EFI_SUCCESS;
+
+ case ARM_SVC_SPM_RET_INVALID_PARAMS:
+ return EFI_INVALID_PARAMETER;
+
This diff is incomplete. Download the complete patch.
drivers/firmware/efi/vars.c
View fileThis diff is incomplete. Download the complete patch.
fs/efivarfs/inode.c
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fs/efivarfs/internal.h
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fs/efivarfs/super.c
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fs/efivarfs/vars.c
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include/linux/efi.h
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