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efi/bgrt: Enable ACPI BGRT handling on arm64

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Now that the ACPI BGRT handling code has been made generic, we can
enable it for arm64.

Signed-off-by: Bhupesh Sharma <bhsharma@redhat.com>
[ Updated commit log to reflect that BGRT is only enabled for arm64, and added
  missing 'return' statement to the dummy acpi_parse_bgrt() function. ]
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-efi@vger.kernel.org
Link: http://lkml.kernel.org/r/20170404160245.27812-8-ard.biesheuvel@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Bhupesh Sharma 2017-04-04 17:02:41 +01:00 committed by Ingo Molnar
parent 75def552bb
commit 6e7300cff1
5 changed files with 15 additions and 7 deletions
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3
arch/arm64/kernel/acpi.c
View File

@ -18,6 +18,7 @@
#include <linux/acpi.h>
#include <linux/bootmem.h>
#include <linux/cpumask.h>
#include <linux/efi-bgrt.h>
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/irqdomain.h>
@ -233,6 +234,8 @@ done:
early_init_dt_scan_chosen_stdout();
} else {
parse_spcr(earlycon_init_is_deferred);
if (IS_ENABLED(CONFIG_ACPI_BGRT))
acpi_table_parse(ACPI_SIG_BGRT, acpi_parse_bgrt);
}
}

6
arch/x86/kernel/acpi/boot.c
View File

@ -1564,12 +1564,6 @@ int __init early_acpi_boot_init(void)
return 0;
}
static int __init acpi_parse_bgrt(struct acpi_table_header *table)
{
efi_bgrt_init(table);
return 0;
}
int __init acpi_boot_init(void)
{
/* those are executed after early-quirks are executed */

2
drivers/acpi/Kconfig
View File

@ -440,7 +440,7 @@ config ACPI_CUSTOM_METHOD
config ACPI_BGRT
bool "Boottime Graphics Resource Table support"
depends on EFI && X86
depends on EFI && (X86 || ARM64)
help
This driver adds support for exposing the ACPI Boottime Graphics
Resource Table, which allows the operating system to obtain

6
drivers/acpi/bgrt.c
View File

@ -81,6 +81,12 @@ static struct attribute_group bgrt_attribute_group = {
.bin_attrs = bgrt_bin_attributes,
};
int __init acpi_parse_bgrt(struct acpi_table_header *table)
{
efi_bgrt_init(table);
return 0;
}
static int __init bgrt_init(void)
{
int ret;

5
include/linux/efi-bgrt.h
View File

@ -6,6 +6,7 @@
#ifdef CONFIG_ACPI_BGRT
void efi_bgrt_init(struct acpi_table_header *table);
int __init acpi_parse_bgrt(struct acpi_table_header *table);
/* The BGRT data itself; only valid if bgrt_image != NULL. */
extern size_t bgrt_image_size;
@ -14,6 +15,10 @@ extern struct acpi_table_bgrt bgrt_tab;
#else /* !CONFIG_ACPI_BGRT */
static inline void efi_bgrt_init(struct acpi_table_header *table) {}
static inline int __init acpi_parse_bgrt(struct acpi_table_header *table)
{
return 0;
}
#endif /* !CONFIG_ACPI_BGRT */