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efi/bgrt: Enable ACPI BGRT handling on arm64 

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/acpi.h>
#include <linux/bootmem.h> #include <linux/bootmem.h>
#include <linux/cpumask.h> #include <linux/cpumask.h>
#include <linux/efi-bgrt.h>
#include <linux/init.h> #include <linux/init.h>
#include <linux/irq.h> #include <linux/irq.h>
#include <linux/irqdomain.h> #include <linux/irqdomain.h>
@ -233,6 +234,8 @@ done:
early_init_dt_scan_chosen_stdout(); early_init_dt_scan_chosen_stdout();
} else { } else {
parse_spcr(earlycon_init_is_deferred); 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; 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) int __init acpi_boot_init(void)
{ {
/* those are executed after early-quirks are executed */ /* 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 config ACPI_BGRT
bool "Boottime Graphics Resource Table support" bool "Boottime Graphics Resource Table support"
depends on EFI && X86 depends on EFI && (X86 || ARM64)
help help
This driver adds support for exposing the ACPI Boottime Graphics This driver adds support for exposing the ACPI Boottime Graphics
Resource Table, which allows the operating system to obtain 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, .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) static int __init bgrt_init(void)
{ {
int ret; int ret;

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

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