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96 lines
3.7 KiB
96 lines
3.7 KiB
From bbf8235eb297047521ac83b594389d70ecfb38df Mon Sep 17 00:00:00 2001
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From: Lennart Poettering <lennart@poettering.net>
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Date: Wed, 14 Dec 2022 18:48:52 +0100
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Subject: [PATCH] efi: add common implementation for loop finding EFI
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configuration tables
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(cherry picked from commit a04709c1ac81b28b1a4144166991ac56be94cfcd)
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Related: RHEL-16952
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---
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src/boot/efi/devicetree.c | 11 ++---------
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src/boot/efi/random-seed.c | 6 +-----
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src/boot/efi/util.c | 8 ++++++++
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src/boot/efi/util.h | 2 ++
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4 files changed, 13 insertions(+), 14 deletions(-)
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diff --git a/src/boot/efi/devicetree.c b/src/boot/efi/devicetree.c
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index daba5582aa..12015fce6b 100644
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--- a/src/boot/efi/devicetree.c
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+++ b/src/boot/efi/devicetree.c
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@@ -8,13 +8,6 @@
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#define FDT_V1_SIZE (7*4)
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-static void *get_dtb_table(void) {
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- for (UINTN i = 0; i < ST->NumberOfTableEntries; i++)
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- if (efi_guid_equal(&ST->ConfigurationTable[i].VendorGuid, &EfiDtbTableGuid))
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- return ST->ConfigurationTable[i].VendorTable;
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- return NULL;
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-}
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-
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static EFI_STATUS devicetree_allocate(struct devicetree_state *state, UINTN size) {
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UINTN pages = DIV_ROUND_UP(size, EFI_PAGE_SIZE);
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EFI_STATUS err;
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@@ -81,7 +74,7 @@ EFI_STATUS devicetree_install(struct devicetree_state *state, EFI_FILE *root_dir
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assert(root_dir);
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assert(name);
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- state->orig = get_dtb_table();
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+ state->orig = find_configuration_table(&EfiDtbTableGuid);
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if (!state->orig)
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return EFI_UNSUPPORTED;
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@@ -121,7 +114,7 @@ EFI_STATUS devicetree_install_from_memory(struct devicetree_state *state,
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assert(state);
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assert(dtb_buffer && dtb_length > 0);
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- state->orig = get_dtb_table();
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+ state->orig = find_configuration_table(&EfiDtbTableGuid);
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if (!state->orig)
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return EFI_UNSUPPORTED;
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diff --git a/src/boot/efi/random-seed.c b/src/boot/efi/random-seed.c
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index 6070145778..332f537d91 100644
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--- a/src/boot/efi/random-seed.c
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+++ b/src/boot/efi/random-seed.c
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@@ -146,11 +146,7 @@ EFI_STATUS process_random_seed(EFI_FILE *root_dir) {
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/* Some basic domain separation in case somebody uses this data elsewhere */
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sha256_process_bytes(HASH_LABEL, sizeof(HASH_LABEL) - 1, &hash);
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- for (size_t i = 0; i < ST->NumberOfTableEntries; ++i)
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- if (efi_guid_equal(&ST->ConfigurationTable[i].VendorGuid, &(const EFI_GUID) LINUX_EFI_RANDOM_SEED_TABLE_GUID)) {
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- previous_seed_table = ST->ConfigurationTable[i].VendorTable;
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- break;
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- }
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+ previous_seed_table = find_configuration_table(&(const EFI_GUID) LINUX_EFI_RANDOM_SEED_TABLE_GUID);
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if (!previous_seed_table) {
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size = 0;
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sha256_process_bytes(&size, sizeof(size), &hash);
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diff --git a/src/boot/efi/util.c b/src/boot/efi/util.c
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index 1f07fbc38c..0a6bb59dce 100644
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--- a/src/boot/efi/util.c
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+++ b/src/boot/efi/util.c
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@@ -747,3 +747,11 @@ bool in_hypervisor(void) {
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return !!(ecx & 0x80000000U);
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}
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#endif
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+
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+void *find_configuration_table(const EFI_GUID *guid) {
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+ for (UINTN i = 0; i < ST->NumberOfTableEntries; i++)
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+ if (efi_guid_equal(&ST->ConfigurationTable[i].VendorGuid, guid))
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+ return ST->ConfigurationTable[i].VendorTable;
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+
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+ return NULL;
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+}
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diff --git a/src/boot/efi/util.h b/src/boot/efi/util.h
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index a076f48dba..88fc60c17e 100644
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--- a/src/boot/efi/util.h
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+++ b/src/boot/efi/util.h
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@@ -221,3 +221,5 @@ static inline bool in_hypervisor(void) {
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static inline bool efi_guid_equal(const EFI_GUID *a, const EFI_GUID *b) {
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return memcmp(a, b, sizeof(EFI_GUID)) == 0;
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}
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+
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+void *find_configuration_table(const EFI_GUID *guid);
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