From 8b0a8165cdad0f4133837d753649ef4682e42c3b Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 7 Aug 2024 15:11:40 +0200 Subject: Merging upstream version 6.9.7. Signed-off-by: Daniel Baumann --- drivers/firmware/efi/libstub/efi-stub-helper.c | 98 ++++++++++++++++++-------- 1 file changed, 70 insertions(+), 28 deletions(-) (limited to 'drivers/firmware/efi/libstub/efi-stub-helper.c') diff --git a/drivers/firmware/efi/libstub/efi-stub-helper.c b/drivers/firmware/efi/libstub/efi-stub-helper.c index 3dc2f9aaf0..de659f6a81 100644 --- a/drivers/firmware/efi/libstub/efi-stub-helper.c +++ b/drivers/firmware/efi/libstub/efi-stub-helper.c @@ -11,6 +11,7 @@ #include #include +#include #include #include @@ -201,7 +202,7 @@ void efi_apply_loadoptions_quirk(const void **load_options, u32 *load_options_si *load_options_size = load_option_unpacked.optional_data_size; } -enum efistub_event { +enum efistub_event_type { EFISTUB_EVT_INITRD, EFISTUB_EVT_LOAD_OPTIONS, EFISTUB_EVT_COUNT, @@ -227,54 +228,95 @@ static const struct { }, }; +static_assert(sizeof(efi_tcg2_event_t) == sizeof(efi_cc_event_t)); + +union efistub_event { + efi_tcg2_event_t tcg2_data; + efi_cc_event_t cc_data; +}; + +struct efistub_measured_event { + union efistub_event event_data; + TCG_PCClientTaggedEvent tagged_event __packed; +}; + static efi_status_t efi_measure_tagged_event(unsigned long load_addr, unsigned long load_size, - enum efistub_event event) + enum efistub_event_type event) { + union { + efi_status_t + (__efiapi *hash_log_extend_event)(void *, u64, efi_physical_addr_t, + u64, const union efistub_event *); + struct { u32 hash_log_extend_event; } mixed_mode; + } method; + struct efistub_measured_event *evt; + int size = struct_size(evt, tagged_event.tagged_event_data, + events[event].event_data_len); efi_guid_t tcg2_guid = EFI_TCG2_PROTOCOL_GUID; efi_tcg2_protocol_t *tcg2 = NULL; + union efistub_event ev; efi_status_t status; + void *protocol; efi_bs_call(locate_protocol, &tcg2_guid, NULL, (void **)&tcg2); if (tcg2) { - struct efi_measured_event { - efi_tcg2_event_t event_data; - efi_tcg2_tagged_event_t tagged_event; - u8 tagged_event_data[]; - } *evt; - int size = sizeof(*evt) + events[event].event_data_len; - - status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, size, - (void **)&evt); - if (status != EFI_SUCCESS) - goto fail; - - evt->event_data = (struct efi_tcg2_event){ + ev.tcg2_data = (struct efi_tcg2_event){ .event_size = size, - .event_header.header_size = sizeof(evt->event_data.event_header), + .event_header.header_size = sizeof(ev.tcg2_data.event_header), .event_header.header_version = EFI_TCG2_EVENT_HEADER_VERSION, .event_header.pcr_index = events[event].pcr_index, .event_header.event_type = EV_EVENT_TAG, }; + protocol = tcg2; + method.hash_log_extend_event = + (void *)efi_table_attr(tcg2, hash_log_extend_event); + } else { + efi_guid_t cc_guid = EFI_CC_MEASUREMENT_PROTOCOL_GUID; + efi_cc_protocol_t *cc = NULL; - evt->tagged_event = (struct efi_tcg2_tagged_event){ - .tagged_event_id = events[event].event_id, - .tagged_event_data_size = events[event].event_data_len, - }; - - memcpy(evt->tagged_event_data, events[event].event_data, - events[event].event_data_len); + efi_bs_call(locate_protocol, &cc_guid, NULL, (void **)&cc); + if (!cc) + return EFI_UNSUPPORTED; - status = efi_call_proto(tcg2, hash_log_extend_event, 0, - load_addr, load_size, &evt->event_data); - efi_bs_call(free_pool, evt); + ev.cc_data = (struct efi_cc_event){ + .event_size = size, + .event_header.header_size = sizeof(ev.cc_data.event_header), + .event_header.header_version = EFI_CC_EVENT_HEADER_VERSION, + .event_header.event_type = EV_EVENT_TAG, + }; + status = efi_call_proto(cc, map_pcr_to_mr_index, + events[event].pcr_index, + &ev.cc_data.event_header.mr_index); if (status != EFI_SUCCESS) goto fail; - return EFI_SUCCESS; + + protocol = cc; + method.hash_log_extend_event = + (void *)efi_table_attr(cc, hash_log_extend_event); } - return EFI_UNSUPPORTED; + status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, size, (void **)&evt); + if (status != EFI_SUCCESS) + goto fail; + + *evt = (struct efistub_measured_event) { + .event_data = ev, + .tagged_event.tagged_event_id = events[event].event_id, + .tagged_event.tagged_event_data_size = events[event].event_data_len, + }; + + memcpy(evt->tagged_event.tagged_event_data, events[event].event_data, + events[event].event_data_len); + + status = efi_fn_call(&method, hash_log_extend_event, protocol, 0, + load_addr, load_size, &evt->event_data); + efi_bs_call(free_pool, evt); + + if (status == EFI_SUCCESS) + return EFI_SUCCESS; + fail: efi_warn("Failed to measure data for event %d: 0x%lx\n", event, status); return status; -- cgit v1.2.3