[xen staging] acpi: Set TPM2 LAML to actual log area size

[patchbot@xxxxxxx]

commit 242a5f75eea221cd959b6573bff9417b6d27f2be
Author:     Tu Dinh <ngoc-tu.dinh@xxxxxxxxxx>
AuthorDate: Wed Nov 12 09:36:06 2025 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Wed Nov 12 09:36:06 2025 +0100

    acpi: Set TPM2 LAML to actual log area size
    
    The LAML field should follow the TCG PC Client Platform Firmware Profile
    Specification Version. Version 1.06 Revision 52 says:
    
    'The TCG ACPI specification uses the field name "Log Area Minimum
     Length", but the field value is the actual log area length reserved by
     Platform Firmware, not a lower bound.'
    
    Remove the now-unused TPM_LOG_AREA_MINIMUM_SIZE.
    
    No functional change.
    
    Signed-off-by: Tu Dinh <ngoc-tu.dinh@xxxxxxxxxx>
    Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
---
 tools/libacpi/acpi2_0.h | 1 -
 tools/libacpi/build.c   | 2 +-
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/tools/libacpi/acpi2_0.h b/tools/libacpi/acpi2_0.h
index 6dfa939a8c..51623e2a8a 100644
--- a/tools/libacpi/acpi2_0.h
+++ b/tools/libacpi/acpi2_0.h
@@ -140,7 +140,6 @@ struct acpi_20_tpm2 {
 
 #define TPM_LOG_AREA_ADDRESS        0xFED50000
 
-#define TPM_LOG_AREA_MINIMUM_SIZE   (64 << 10)
 #define TPM_LOG_SIZE                (64 << 10)
 
 /*
diff --git a/tools/libacpi/build.c b/tools/libacpi/build.c
index 2f29863db1..95188e217e 100644
--- a/tools/libacpi/build.c
+++ b/tools/libacpi/build.c
@@ -473,7 +473,7 @@ static int construct_secondary_tables(struct acpi_ctxt 
*ctxt,
             tpm2->platform_class = TPM2_ACPI_CLASS_CLIENT;
             tpm2->control_area_address = TPM_CRB_CTRL_REQ;
             tpm2->start_method = TPM2_START_METHOD_CRB;
-            tpm2->log_area_minimum_length = TPM_LOG_AREA_MINIMUM_SIZE;
+            tpm2->log_area_minimum_length = TPM_LOG_SIZE;
             tpm2->log_area_start_address = TPM_LOG_AREA_ADDRESS;
 
             set_checksum(tpm2,
--
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