[PATCH 2/3] x86/acpi: Remove BGRT invalidation code

[Soumyajyotii Ssarkar <soumyajyotisarkar23@xxxxxxxxx>]

Now that BGRT images are preserved during EFI boot (via
EfiACPIReclaimMemory allocation), the invalidation code in
acpi_parse_bgrt() is no longer needed. The BGRT table remains
valid throughout boot.

This removes the code that was marking BGRT invalid when the
image memory was detected as unavailable, which was causing
ACPI warnings in Linux dom0.

Signed-off-by: Soumyajyotii Ssarkar <soumyajyotisarkar23@xxxxxxxxx>
---
 xen/arch/x86/acpi/boot.c | 23 -----------------------
 1 file changed, 23 deletions(-)

diff --git a/xen/arch/x86/acpi/boot.c b/xen/arch/x86/acpi/boot.c
index 1ca2360e00..fc88b559e6 100644
--- a/xen/arch/x86/acpi/boot.c
+++ b/xen/arch/x86/acpi/boot.c
@@ -327,27 +327,6 @@ static int __init cf_check acpi_parse_hpet(struct 
acpi_table_header *table)
        return 0;
 }

-static int __init cf_check acpi_invalidate_bgrt(struct acpi_table_header 
*table)
-{
-       struct acpi_table_bgrt *bgrt_tbl =
-               container_of(table, struct acpi_table_bgrt, header);
-
-       if (table->length < sizeof(*bgrt_tbl))
-               return -1;
-
-       if (bgrt_tbl->version == 1 && bgrt_tbl->image_address
-           && !page_is_ram_type(PFN_DOWN(bgrt_tbl->image_address),
-                                RAM_TYPE_CONVENTIONAL))
-               return 0;
-
-       printk(KERN_INFO PREFIX "BGRT: invalidating v%d image at %#"PRIx64"\n",
-              bgrt_tbl->version, bgrt_tbl->image_address);
-       bgrt_tbl->image_address = 0;
-       bgrt_tbl->status &= ~1;
-
-       return 0;
-}
-
 #define acpi_fadt_copy_address(dst, src, len) do {                     \
        if (fadt->header.revision >= FADT2_REVISION_ID &&               \
            fadt->header.length >= ACPI_FADT_V2_SIZE)                   \
@@ -752,7 +731,5 @@ int __init acpi_boot_init(void)

        acpi_hest_init();

-       acpi_table_parse(ACPI_SIG_BGRT, acpi_invalidate_bgrt);
-
        return 0;
 }
--
2.53.0