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146b78e08c
Add patches for coreboot 4.17: - show ME status even when device is disable (kept from 4.15) - zero unused part of SMBIOS region Signed-off-by: Daniel Pineda <daniel.pineda@puri.sm>
35 lines
1.3 KiB
Diff
35 lines
1.3 KiB
Diff
From 517c2ad54bfc44b984457ca30c34410487eb2be9 Mon Sep 17 00:00:00 2001
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From: Jonathon Hall <jonathon.hall@puri.sm>
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Date: Wed, 27 Jul 2022 09:45:40 -0400
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Subject: [PATCH 3/3] x86: Zero unused part of SMBIOS region
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Since SMBIOS was increased from 4K to 32K, the unused region could include
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parts of the ACPI region from a prior boot, which may confuse the OS if it
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finds remanent table signatures.
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Change-Id: I0ebac7c70a6887c6d3380702d242618e86e84185
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Signed-off-by: Jonathon Hall <jonathon.hall@puri.sm>
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---
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src/arch/x86/tables.c | 5 +++++
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1 file changed, 5 insertions(+)
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diff --git a/src/arch/x86/tables.c b/src/arch/x86/tables.c
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index 8d2f7b6f20..282dfc58a8 100644
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--- a/src/arch/x86/tables.c
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+++ b/src/arch/x86/tables.c
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@@ -151,6 +151,11 @@ static unsigned long write_smbios_table(unsigned long rom_table_end)
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new_high_table_pointer =
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smbios_write_tables(high_table_pointer);
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+ /* Clear the unused part of the region, in case other table
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+ * signatures could be present from a prior boot
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+ */
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+ memset((void *)new_high_table_pointer, 0, high_table_pointer +
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+ MAX_SMBIOS_SIZE - new_high_table_pointer);
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rom_table_end = ALIGN_UP(rom_table_end, 16);
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memcpy((void *)rom_table_end, (void *)high_table_pointer,
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sizeof(struct smbios_entry));
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--
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2.25.1
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