Commit bc5b492a authored by David Woodhouse's avatar David Woodhouse Committed by Will Deacon
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ACPICA: Detect FACS even for hardware reduced platforms 



ACPICA commit 44fc328a1a14b097d92b8be83989e4bf69b6e6cb

The FACS is optional even on hardware reduced platforms, and may exist
for the purpose of communicating the hardware_signature field to provoke
a clean reboot instead of a resume from hibernation.

Signed-off-by: default avatarDavid Woodhouse <dwmw@amazon.co.uk>
Acked-by: default avatarRafael J. Wysocki <rafael@kernel.org>
Link: https://lore.kernel.org/r/20240412073530.2222496-2-dwmw2@infradead.org


Signed-off-by: default avatarWill Deacon <will@kernel.org>
parent fec50db7

drivers/acpi/acpica/tbfadt.c

+13 −17
Original line number Diff line number Diff line
@@ -315,9 +315,6 @@ void acpi_tb_parse_fadt(void) 
				       ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL,

				       NULL, FALSE, TRUE, &acpi_gbl_dsdt_index);



	/* If Hardware Reduced flag is set, there is no FACS */



	if (!acpi_gbl_reduced_hardware) {

	if (acpi_gbl_FADT.facs) {

		acpi_tb_install_standard_table((acpi_physical_address)

					       acpi_gbl_FADT.facs,
@@ -333,7 +330,6 @@ void acpi_tb_parse_fadt(void) 
					       &acpi_gbl_xfacs_index);

	}

}

}



/*******************************************************************************

 *

drivers/acpi/acpica/tbutils.c

+1 −6
Original line number Diff line number Diff line
@@ -36,12 +36,7 @@ acpi_status acpi_tb_initialize_facs(void) 
{

	struct acpi_table_facs *facs;



	/* If Hardware Reduced flag is set, there is no FACS */



	if (acpi_gbl_reduced_hardware) {

		acpi_gbl_FACS = NULL;

		return (AE_OK);

	} else if (acpi_gbl_FADT.Xfacs &&

	if (acpi_gbl_FADT.Xfacs &&

		   (!acpi_gbl_FADT.facs

		    || !acpi_gbl_use32_bit_facs_addresses)) {

		(void)acpi_get_table_by_index(acpi_gbl_xfacs_index,