Commit 89067434 authored Feb 06, 2018 by Shunyong Yang Committed by Rafael J. Wysocki Feb 07, 2018

ACPI / tables: Add IORT to injectable table list



Loading IORT table from initrd can be used to fix severe firmware
IORT defects temporarily before platform/BIOS vendor releases an
upgraded BIOS binary.

Moreover, it is very powerful to debug SMMU node/device probe, MSI
allocation, stream id translation and IORT table from firmware.

It is also very useful to enable SMMU and devices behind SMMU before
firmware is ready.

This patch adds ACPI_SIG_IORT to the table, which enables IORT
from initrd to override which from firmware.

Signed-off-by: Yang Shunyong <shunyong.yang@hxt-semitech.com>
Acked-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

parent 1a9a126b

drivers/acpi/tables.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -456,7 +456,8 @@ static const char * const table_sigs[] = {
		ACPI_SIG_SLIC, ACPI_SIG_SPCR, ACPI_SIG_SPMI, ACPI_SIG_TCPA,
		ACPI_SIG_UEFI, ACPI_SIG_WAET, ACPI_SIG_WDAT, ACPI_SIG_WDDT,
		ACPI_SIG_WDRT, ACPI_SIG_DSDT, ACPI_SIG_FADT, ACPI_SIG_PSDT,
		ACPI_SIG_RSDT, ACPI_SIG_XSDT, ACPI_SIG_SSDT, NULL };
		ACPI_SIG_RSDT, ACPI_SIG_XSDT, ACPI_SIG_SSDT, ACPI_SIG_IORT,
		NULL };

		#define ACPI_HEADER_SIZE sizeof(struct acpi_table_header)

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