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x86: Fix TCPA bloblist size

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Excessive default value causes crash on hardware: x86 baytrail E3845

It is unclear where the data is being populated being 'BLOBLISTT_TCPA_LOG'
is not found elsewhere in the u-boot tree. This leads to confusion about
how much space for TPM log is actually needed.

This was tested on hardware using TPMv1.

Signed-off-by: Eric Schikschneit <eric.schikschneit@novatechautomation.com>
This commit is contained in:
Eric Schikschneit 2025-07-24 11:31:56 -05:00 committed by Tom Rini
parent 71f2564b17
commit a22a4fbe43
1 changed files with 1 additions and 2 deletions
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3
arch/x86/lib/acpi_table.c
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@ -144,7 +144,7 @@ int acpi_write_tcpa(struct acpi_ctx *ctx, const struct acpi_writer *entry)
struct acpi_table_header *header;
struct acpi_tcpa *tcpa;
u32 current;
int size = 0x10000; /* Use this as the default size */
int size = 1500; /* Use this as the default size */
void *log;
int ret;
@ -165,7 +165,6 @@ int acpi_write_tcpa(struct acpi_ctx *ctx, const struct acpi_writer *entry)
ret = bloblist_ensure_size_ret(BLOBLISTT_TCPA_LOG, &size, &log);
if (ret)
return log_msg_ret("blob", ret);
tcpa->platform_class = 0;
tcpa->laml = size;
tcpa->lasa = nomap_to_sysmem(log);