From ac5c9367548750e75ed1e7fc4354a3d20186d733 Mon Sep 17 00:00:00 2001 From: Daniel Kiper Date: Thu, 3 Dec 2020 16:01:47 +0100 Subject: [PATCH] efi: Add a function to read EFI variables with attributes It will be used to properly detect and report UEFI Secure Boot status to the x86 Linux kernel. The functionality will be added by subsequent patches. Signed-off-by: Ignat Korchagin Signed-off-by: Daniel Kiper Signed-off-by: Marco A Benatto Signed-off-by: Javier Martinez Canillas Reviewed-by: Daniel Kiper --- grub-core/kern/efi/efi.c | 16 +++++++++++++--- include/grub/efi/efi.h | 5 +++++ 2 files changed, 18 insertions(+), 3 deletions(-) diff --git a/grub-core/kern/efi/efi.c b/grub-core/kern/efi/efi.c index 9403b12cd..2942b8e35 100644 --- a/grub-core/kern/efi/efi.c +++ b/grub-core/kern/efi/efi.c @@ -224,8 +224,11 @@ grub_efi_set_variable(const char *var, const grub_efi_guid_t *guid, } grub_efi_status_t -grub_efi_get_variable (const char *var, const grub_efi_guid_t *guid, - grub_size_t *datasize_out, void **data_out) +grub_efi_get_variable_with_attributes (const char *var, + const grub_efi_guid_t *guid, + grub_size_t *datasize_out, + void **data_out, + grub_efi_uint32_t *attributes) { grub_efi_status_t status; grub_efi_uintn_t datasize = 0; @@ -262,7 +265,7 @@ grub_efi_get_variable (const char *var, const grub_efi_guid_t *guid, return GRUB_EFI_OUT_OF_RESOURCES; } - status = efi_call_5 (r->get_variable, var16, guid, NULL, &datasize, data); + status = efi_call_5 (r->get_variable, var16, guid, attributes, &datasize, data); grub_free (var16); if (status == GRUB_EFI_SUCCESS) @@ -276,6 +279,13 @@ grub_efi_get_variable (const char *var, const grub_efi_guid_t *guid, return status; } +grub_efi_status_t +grub_efi_get_variable (const char *var, const grub_efi_guid_t *guid, + grub_size_t *datasize_out, void **data_out) +{ + return grub_efi_get_variable_with_attributes (var, guid, datasize_out, data_out, NULL); +} + #pragma GCC diagnostic ignored "-Wcast-align" /* Search the mods section from the PE32/PE32+ image. This code uses diff --git a/include/grub/efi/efi.h b/include/grub/efi/efi.h index 8b2a0f1f5..83d958f99 100644 --- a/include/grub/efi/efi.h +++ b/include/grub/efi/efi.h @@ -74,6 +74,11 @@ grub_err_t EXPORT_FUNC (grub_efi_set_virtual_address_map) (grub_efi_uintn_t memo grub_efi_uintn_t descriptor_size, grub_efi_uint32_t descriptor_version, grub_efi_memory_descriptor_t *virtual_map); +grub_efi_status_t EXPORT_FUNC (grub_efi_get_variable_with_attributes) (const char *variable, + const grub_efi_guid_t *guid, + grub_size_t *datasize_out, + void **data_out, + grub_efi_uint32_t *attributes); grub_efi_status_t EXPORT_FUNC (grub_efi_get_variable) (const char *variable, const grub_efi_guid_t *guid, grub_size_t *datasize_out, -- 2.29.2