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[46.103.15.185]) by smtp.gmail.com with ESMTPSA id e7-20020a056402104700b00459f4974128sm807211edu.50.2022.10.06.06.08.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 06 Oct 2022 06:08:57 -0700 (PDT) From: Ilias Apalodimas To: xypron.glpk@gmx.de Cc: takahiro.akashi@linaro.org, Ilias Apalodimas , u-boot@lists.denx.de Subject: [PATCH 1/2] efi_loader: define internal implementations of install/uninstallmultiple Date: Thu, 6 Oct 2022 16:08:43 +0300 Message-Id: <20221006130847.22861-2-ilias.apalodimas@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20221006130847.22861-1-ilias.apalodimas@linaro.org> References: <20221006130847.22861-1-ilias.apalodimas@linaro.org> MIME-Version: 1.0 X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.39 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" X-Virus-Scanned: clamav-milter 0.103.6 at phobos.denx.de X-Virus-Status: Clean A following patch is cleaning up the core EFI code trying to remove sequences of efi_create_handle, efi_add_protocol. Although this works fine there's a problem with the latter since it is usually combined with efi_delete_handle() which blindly removes all protocols on a handle and deletes the handle. We should try to adhere to the EFI spec which only deletes a handle if the last instance of a protocol has been removed. Another problem is that efi_delete_handle() never checks for opened protocols, but the EFI spec defines that the caller is responsible for ensuring that there are no references to a protocol interface that is going to be removed. So let's fix this by replacing all callsites of efi_create_handle(), efi_add_protocol() , efi_delete_handle() with Install/UninstallMultipleProtocol. In order to do that redefine functions that can be used by the U-Boot proper internally and add '_ext' variants that will be used from the EFI API Signed-off-by: Ilias Apalodimas --- include/efi.h | 2 + include/efi_loader.h | 6 +- lib/efi_loader/efi_boottime.c | 214 +++++++++++++++++++++++-------- lib/efi_loader/efi_capsule.c | 15 ++- lib/efi_loader/efi_console.c | 14 +- lib/efi_loader/efi_disk.c | 10 +- lib/efi_loader/efi_load_initrd.c | 15 +-- lib/efi_loader/efi_root_node.c | 44 +++---- 8 files changed, 216 insertions(+), 104 deletions(-) diff --git a/include/efi.h b/include/efi.h index 6159f34ad2be..42f4e58a917e 100644 --- a/include/efi.h +++ b/include/efi.h @@ -37,12 +37,14 @@ #define EFIAPI __attribute__((ms_abi)) #define efi_va_list __builtin_ms_va_list #define efi_va_start __builtin_ms_va_start +#define efi_va_copy __builtin_ms_va_copy #define efi_va_arg __builtin_va_arg #define efi_va_end __builtin_ms_va_end #else #define EFIAPI asmlinkage #define efi_va_list va_list #define efi_va_start va_start +#define efi_va_copy va_copy #define efi_va_arg va_arg #define efi_va_end va_end #endif /* __x86_64__ */ diff --git a/include/efi_loader.h b/include/efi_loader.h index ad01395b39c3..2b294d64efd0 100644 --- a/include/efi_loader.h +++ b/include/efi_loader.h @@ -655,8 +655,10 @@ efi_status_t efi_remove_protocol(const efi_handle_t handle, /* Delete all protocols from a handle */ efi_status_t efi_remove_all_protocols(const efi_handle_t handle); /* Install multiple protocol interfaces */ -efi_status_t EFIAPI efi_install_multiple_protocol_interfaces - (efi_handle_t *handle, ...); +efi_status_t EFIAPI +efi_install_multiple_protocol_interfaces(efi_handle_t *handle, ...); +efi_status_t EFIAPI +efi_uninstall_multiple_protocol_interfaces(efi_handle_t handle, ...); /* Get handles that support a given protocol */ efi_status_t EFIAPI efi_locate_handle_buffer( enum efi_locate_search_type search_type, diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c index 1bfd094e89f8..e776d25830f0 100644 --- a/lib/efi_loader/efi_boottime.c +++ b/lib/efi_loader/efi_boottime.c @@ -2590,35 +2590,31 @@ found: } /** - * efi_install_multiple_protocol_interfaces() - Install multiple protocol + * efi_install_multiple_protocol_interfaces_int() - Install multiple protocol * interfaces * @handle: handle on which the protocol interfaces shall be installed - * @...: NULL terminated argument list with pairs of protocol GUIDS and - * interfaces + * @argptr: va_list of args * - * This function implements the MultipleProtocolInterfaces service. - * - * See the Unified Extensible Firmware Interface (UEFI) specification for - * details. + * Core functionality of efi_install_multiple_protocol_interfaces + * Must not be called directly * * Return: status code */ -efi_status_t EFIAPI efi_install_multiple_protocol_interfaces - (efi_handle_t *handle, ...) +static efi_status_t EFIAPI +efi_install_multiple_protocol_interfaces_int(efi_handle_t *handle, + efi_va_list argptr) { - EFI_ENTRY("%p", handle); - - efi_va_list argptr; const efi_guid_t *protocol; void *protocol_interface; efi_handle_t old_handle; - efi_status_t r = EFI_SUCCESS; + efi_status_t ret = EFI_SUCCESS; int i = 0; + efi_va_list argptr_copy; if (!handle) - return EFI_EXIT(EFI_INVALID_PARAMETER); + return EFI_INVALID_PARAMETER; - efi_va_start(argptr, handle); + efi_va_copy(argptr_copy, argptr); for (;;) { protocol = efi_va_arg(argptr, efi_guid_t*); if (!protocol) @@ -2628,104 +2624,212 @@ efi_status_t EFIAPI efi_install_multiple_protocol_interfaces if (!guidcmp(protocol, &efi_guid_device_path)) { struct efi_device_path *dp = protocol_interface; - r = EFI_CALL(efi_locate_device_path(protocol, &dp, - &old_handle)); - if (r == EFI_SUCCESS && + ret = EFI_CALL(efi_locate_device_path(protocol, &dp, + &old_handle)); + if (ret == EFI_SUCCESS && dp->type == DEVICE_PATH_TYPE_END) { EFI_PRINT("Path %pD already installed\n", protocol_interface); - r = EFI_ALREADY_STARTED; + ret = EFI_ALREADY_STARTED; break; } } - r = EFI_CALL(efi_install_protocol_interface( - handle, protocol, - EFI_NATIVE_INTERFACE, - protocol_interface)); - if (r != EFI_SUCCESS) + ret = EFI_CALL(efi_install_protocol_interface(handle, protocol, + EFI_NATIVE_INTERFACE, + protocol_interface)); + if (ret != EFI_SUCCESS) break; i++; } - efi_va_end(argptr); - if (r == EFI_SUCCESS) - return EFI_EXIT(r); + if (ret == EFI_SUCCESS) + goto out; /* If an error occurred undo all changes. */ - efi_va_start(argptr, handle); for (; i; --i) { - protocol = efi_va_arg(argptr, efi_guid_t*); - protocol_interface = efi_va_arg(argptr, void*); + protocol = efi_va_arg(argptr_copy, efi_guid_t*); + protocol_interface = efi_va_arg(argptr_copy, void*); EFI_CALL(efi_uninstall_protocol_interface(*handle, protocol, protocol_interface)); } - efi_va_end(argptr); - return EFI_EXIT(r); +out: + efi_va_end(argptr_copy); + return ret; + } /** - * efi_uninstall_multiple_protocol_interfaces() - uninstall multiple protocol - * interfaces - * @handle: handle from which the protocol interfaces shall be removed + * efi_install_multiple_protocol_interfaces() - Install multiple protocol + * interfaces + * @handle: handle on which the protocol interfaces shall be installed * @...: NULL terminated argument list with pairs of protocol GUIDS and * interfaces * - * This function implements the UninstallMultipleProtocolInterfaces service. + * + * This is the function for internal usage in U-Boot. For the API function + * implementing the InstallMultipleProtocol service see + * efi_install_multiple_protocol_interfaces_ext() + * + * Return: status code + */ +efi_status_t EFIAPI +efi_install_multiple_protocol_interfaces(efi_handle_t *handle, ...) +{ + efi_status_t ret; + efi_va_list argptr; + + efi_va_start(argptr, handle); + ret = efi_install_multiple_protocol_interfaces_int(handle, argptr); + efi_va_end(argptr); + return ret; +} + +/** + * efi_install_multiple_protocol_interfaces_ext() - Install multiple protocol + * interfaces + * @handle: handle on which the protocol interfaces shall be installed + * @...: NULL terminated argument list with pairs of protocol GUIDS and + * interfaces + * + * This function implements the MultipleProtocolInterfaces service. * * See the Unified Extensible Firmware Interface (UEFI) specification for * details. * * Return: status code */ -static efi_status_t EFIAPI efi_uninstall_multiple_protocol_interfaces( - efi_handle_t handle, ...) +static efi_status_t EFIAPI +efi_install_multiple_protocol_interfaces_ext(efi_handle_t *handle, ...) { EFI_ENTRY("%p", handle); - + efi_status_t ret; efi_va_list argptr; + + efi_va_start(argptr, handle); + ret = efi_install_multiple_protocol_interfaces_int(handle, argptr); + efi_va_end(argptr); + return EFI_EXIT(ret); +} + +/** + * efi_uninstall_multiple_protocol_interfaces_int() - wrapper for uninstall + * multiple protocol + * interfaces + * @handle: handle from which the protocol interfaces shall be removed + * @argptr: va_list of args + * + * Core functionality of efi_uninstall_multiple_protocol_interfaces + * Must not be called directly + * + * Return: status code + */ +static efi_status_t EFIAPI +efi_uninstall_multiple_protocol_interfaces_int(efi_handle_t handle, + efi_va_list argptr) +{ const efi_guid_t *protocol; void *protocol_interface; - efi_status_t r = EFI_SUCCESS; + efi_status_t ret; size_t i = 0; + efi_va_list argptr_copy; if (!handle) - return EFI_EXIT(EFI_INVALID_PARAMETER); + return EFI_INVALID_PARAMETER; - efi_va_start(argptr, handle); + efi_va_copy(argptr_copy, argptr); for (;;) { protocol = efi_va_arg(argptr, efi_guid_t*); if (!protocol) break; protocol_interface = efi_va_arg(argptr, void*); - r = efi_uninstall_protocol(handle, protocol, - protocol_interface); - if (r != EFI_SUCCESS) + ret = efi_uninstall_protocol(handle, protocol, + protocol_interface); + if (ret != EFI_SUCCESS) break; i++; } - efi_va_end(argptr); - if (r == EFI_SUCCESS) { + if (ret == EFI_SUCCESS) { /* If the last protocol has been removed, delete the handle. */ if (list_empty(&handle->protocols)) { list_del(&handle->link); free(handle); } - return EFI_EXIT(r); + goto out; } /* If an error occurred undo all changes. */ - efi_va_start(argptr, handle); for (; i; --i) { - protocol = efi_va_arg(argptr, efi_guid_t*); - protocol_interface = efi_va_arg(argptr, void*); + protocol = efi_va_arg(argptr_copy, efi_guid_t*); + protocol_interface = efi_va_arg(argptr_copy, void*); EFI_CALL(efi_install_protocol_interface(&handle, protocol, EFI_NATIVE_INTERFACE, protocol_interface)); } + /* + * If any errors are generated while the protocol interfaces are being + * uninstalled, then the protocols uninstalled prior to the error will + * be reinstalled using InstallProtocolInterface() and the status code + * EFI_INVALID_PARAMETER is returned. + */ + ret = EFI_INVALID_PARAMETER; + +out: + efi_va_end(argptr_copy); + return ret; +} + +/** + * efi_uninstall_multiple_protocol_interfaces() - uninstall multiple protocol + * interfaces + * @handle: handle from which the protocol interfaces shall be removed + * @...: NULL terminated argument list with pairs of protocol GUIDS and + * interfaces + * + * This function implements the UninstallMultipleProtocolInterfaces service. + * + * This is the function for internal usage in U-Boot. For the API function + * implementing the UninstallMultipleProtocolInterfaces service see + * efi_uninstall_multiple_protocol_interfaces_ext() + * + * Return: status code + */ +efi_status_t EFIAPI +efi_uninstall_multiple_protocol_interfaces(efi_handle_t handle, ...) +{ + efi_status_t ret; + efi_va_list argptr; + + efi_va_start(argptr, handle); + ret = efi_uninstall_multiple_protocol_interfaces_int(handle, argptr); efi_va_end(argptr); + return ret; +} + +/** + * efi_uninstall_multiple_protocol_interfaces_ext() - uninstall multiple protocol + * interfaces + * @handle: handle from which the protocol interfaces shall be removed + * @...: NULL terminated argument list with pairs of protocol GUIDS and + * interfaces + * + * This function implements the UninstallMultipleProtocolInterfaces service. + * + * See the Unified Extensible Firmware Interface (UEFI) specification for + * details. + * + * Return: status code + */ +static efi_status_t EFIAPI +efi_uninstall_multiple_protocol_interfaces_ext(efi_handle_t handle, ...) +{ + EFI_ENTRY("%p", handle); + efi_status_t ret; + efi_va_list argptr; - /* In case of an error always return EFI_INVALID_PARAMETER */ - return EFI_EXIT(EFI_INVALID_PARAMETER); + efi_va_start(argptr, handle); + ret = efi_uninstall_multiple_protocol_interfaces_int(handle, argptr); + efi_va_end(argptr); + return EFI_EXIT(ret); } /** @@ -3785,9 +3889,9 @@ static struct efi_boot_services efi_boot_services = { .locate_handle_buffer = efi_locate_handle_buffer, .locate_protocol = efi_locate_protocol, .install_multiple_protocol_interfaces = - efi_install_multiple_protocol_interfaces, + efi_install_multiple_protocol_interfaces_ext, .uninstall_multiple_protocol_interfaces = - efi_uninstall_multiple_protocol_interfaces, + efi_uninstall_multiple_protocol_interfaces_ext, .calculate_crc32 = efi_calculate_crc32, .copy_mem = efi_copy_mem, .set_mem = efi_set_mem, diff --git a/lib/efi_loader/efi_capsule.c b/lib/efi_loader/efi_capsule.c index a6b98f066a0b..b6bd2d6af882 100644 --- a/lib/efi_loader/efi_capsule.c +++ b/lib/efi_loader/efi_capsule.c @@ -636,17 +636,18 @@ efi_status_t __weak efi_load_capsule_drivers(void) if (IS_ENABLED(CONFIG_EFI_CAPSULE_FIRMWARE_FIT)) { handle = NULL; - ret = EFI_CALL(efi_install_multiple_protocol_interfaces( - &handle, &efi_guid_firmware_management_protocol, - &efi_fmp_fit, NULL)); + ret = efi_install_multiple_protocol_interfaces(&handle, + &efi_guid_firmware_management_protocol, + &efi_fmp_fit, + NULL); } if (IS_ENABLED(CONFIG_EFI_CAPSULE_FIRMWARE_RAW)) { handle = NULL; - ret = EFI_CALL(efi_install_multiple_protocol_interfaces( - &handle, - &efi_guid_firmware_management_protocol, - &efi_fmp_raw, NULL)); + ret = efi_install_multiple_protocol_interfaces(&handle, + &efi_guid_firmware_management_protocol, + &efi_fmp_raw, + NULL); } return ret; diff --git a/lib/efi_loader/efi_console.c b/lib/efi_loader/efi_console.c index cf9fbd9cb54d..3354b217a9a4 100644 --- a/lib/efi_loader/efi_console.c +++ b/lib/efi_loader/efi_console.c @@ -1278,12 +1278,14 @@ efi_status_t efi_console_register(void) struct efi_device_path *dp; /* Install protocols on root node */ - r = EFI_CALL(efi_install_multiple_protocol_interfaces - (&efi_root, - &efi_guid_text_output_protocol, &efi_con_out, - &efi_guid_text_input_protocol, &efi_con_in, - &efi_guid_text_input_ex_protocol, &efi_con_in_ex, - NULL)); + r = efi_install_multiple_protocol_interfaces(&efi_root, + &efi_guid_text_output_protocol, + &efi_con_out, + &efi_guid_text_input_protocol, + &efi_con_in, + &efi_guid_text_input_ex_protocol, + &efi_con_in_ex, + NULL); /* Create console node and install device path protocols */ if (CONFIG_IS_ENABLED(DM_SERIAL)) { diff --git a/lib/efi_loader/efi_disk.c b/lib/efi_loader/efi_disk.c index 39ea1a68a683..fb96b0508528 100644 --- a/lib/efi_loader/efi_disk.c +++ b/lib/efi_loader/efi_disk.c @@ -449,10 +449,12 @@ static efi_status_t efi_disk_add_dev( * in this case. */ handle = &diskobj->header; - ret = EFI_CALL(efi_install_multiple_protocol_interfaces( - &handle, &efi_guid_device_path, diskobj->dp, - &efi_block_io_guid, &diskobj->ops, - guid, NULL, NULL)); + ret = efi_install_multiple_protocol_interfaces(&handle, + &efi_guid_device_path, + diskobj->dp, + &efi_block_io_guid, + &diskobj->ops, guid, + NULL, NULL); if (ret != EFI_SUCCESS) goto error; diff --git a/lib/efi_loader/efi_load_initrd.c b/lib/efi_loader/efi_load_initrd.c index 3d6044f76047..87fde3f88c2b 100644 --- a/lib/efi_loader/efi_load_initrd.c +++ b/lib/efi_loader/efi_load_initrd.c @@ -208,14 +208,13 @@ efi_status_t efi_initrd_register(void) if (ret != EFI_SUCCESS) return ret; - ret = EFI_CALL(efi_install_multiple_protocol_interfaces - (&efi_initrd_handle, - /* initramfs */ - &efi_guid_device_path, &dp_lf2_handle, - /* LOAD_FILE2 */ - &efi_guid_load_file2_protocol, - (void *)&efi_lf2_protocol, - NULL)); + ret = efi_install_multiple_protocol_interfaces(&efi_initrd_handle, + /* initramfs */ + &efi_guid_device_path, &dp_lf2_handle, + /* LOAD_FILE2 */ + &efi_guid_load_file2_protocol, + (void *)&efi_lf2_protocol, + NULL); return ret; } diff --git a/lib/efi_loader/efi_root_node.c b/lib/efi_loader/efi_root_node.c index 739c6867f412..b4696d54c33d 100644 --- a/lib/efi_loader/efi_root_node.c +++ b/lib/efi_loader/efi_root_node.c @@ -49,38 +49,38 @@ efi_status_t efi_root_node_register(void) dp->end.length = sizeof(struct efi_device_path); /* Create root node and install protocols */ - ret = EFI_CALL(efi_install_multiple_protocol_interfaces - (&efi_root, - /* Device path protocol */ - &efi_guid_device_path, dp, + ret = efi_install_multiple_protocol_interfaces + (&efi_root, + /* Device path protocol */ + &efi_guid_device_path, dp, #if CONFIG_IS_ENABLED(EFI_DEVICE_PATH_TO_TEXT) - /* Device path to text protocol */ - &efi_guid_device_path_to_text_protocol, - (void *)&efi_device_path_to_text, + /* Device path to text protocol */ + &efi_guid_device_path_to_text_protocol, + (void *)&efi_device_path_to_text, #endif #ifdef CONFIG_EFI_DEVICE_PATH_UTIL - /* Device path utilities protocol */ - &efi_guid_device_path_utilities_protocol, - (void *)&efi_device_path_utilities, + /* Device path utilities protocol */ + &efi_guid_device_path_utilities_protocol, + (void *)&efi_device_path_utilities, #endif #ifdef CONFIG_EFI_DT_FIXUP - /* Device-tree fix-up protocol */ - &efi_guid_dt_fixup_protocol, - (void *)&efi_dt_fixup_prot, + /* Device-tree fix-up protocol */ + &efi_guid_dt_fixup_protocol, + (void *)&efi_dt_fixup_prot, #endif #if CONFIG_IS_ENABLED(EFI_UNICODE_COLLATION_PROTOCOL2) - &efi_guid_unicode_collation_protocol2, - (void *)&efi_unicode_collation_protocol2, + &efi_guid_unicode_collation_protocol2, + (void *)&efi_unicode_collation_protocol2, #endif #if CONFIG_IS_ENABLED(EFI_LOADER_HII) - /* HII string protocol */ - &efi_guid_hii_string_protocol, - (void *)&efi_hii_string, - /* HII database protocol */ - &efi_guid_hii_database_protocol, - (void *)&efi_hii_database, + /* HII string protocol */ + &efi_guid_hii_string_protocol, + (void *)&efi_hii_string, + /* HII database protocol */ + &efi_guid_hii_database_protocol, + (void *)&efi_hii_database, #endif - NULL)); + NULL); efi_root->type = EFI_OBJECT_TYPE_U_BOOT_FIRMWARE; return ret; }