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path: root/drivers/acpi/bgrt.c
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2017-07-04ACPI: BGRT: constify attribute_group structuresArvind Yadav1-1/+1
attribute_groups are not supposed to change at runtime. All functions working with attribute_groups provided by <linux/sysfs.h> work with const attribute_group. So mark the non-const structs as const. Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-04-05efi/bgrt: Enable ACPI BGRT handling on arm64Bhupesh Sharma1-0/+6
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>
2017-02-01efi/x86: Move the EFI BGRT init code to early init codeDave Young1-8/+20
Before invoking the arch specific handler, efi_mem_reserve() reserves the given memory region through memblock. efi_bgrt_init() will call efi_mem_reserve() after mm_init(), at which time memblock is dead and should not be used anymore. The EFI BGRT code depends on ACPI initialization to get the BGRT ACPI table, so move parsing of the BGRT table to ACPI early boot code to ensure that efi_mem_reserve() in EFI BGRT code still use memblock safely. Tested-by: Bhupesh Sharma <bhsharma@redhat.com> Signed-off-by: Dave Young <dyoung@redhat.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Len Brown <lenb@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Matt Fleming <matt@codeblueprint.co.uk> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-acpi@vger.kernel.org Cc: linux-efi@vger.kernel.org Link: http://lkml.kernel.org/r/1485868902-20401-9-git-send-email-ard.biesheuvel@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-03-10drivers/acpi: make bgrt driver explicitly non-modularPaul Gortmaker1-7/+3
The Kconfig for this driver is currently: config ACPI_BGRT bool "Boottime Graphics Resource Table support" ...meaning that it currently is not being built as a module by anyone. Lets remove all modular references, so that when reading the driver there is no doubt it is builtin-only. Since module_init translates to device_initcall in the non-modular case, the init ordering remains unchanged with this commit. We also delete the MODULE_LICENSE tag etc. since all that information was (or is now) contained at the top of the file in the comments. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-08-22acpi: bgrt: fix build error due to attribute changeGreg Kroah-Hartman1-1/+0
No need to call sysfs_bin_attr_init, as the attribute is not dynamically created. Also, we renamed the attribute, so this one isn't even valid anymore. Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Cc: Len Brown <lenb@kernel.org> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-08-21ACPI: bgrt: take advantage of binary sysfs groupsGreg KH1-16/+10
Attribute groups now can handle binary sysfs attributes, so clean up the code here by using a binary attribute array. This saves us the extra call to create the binary attribute at saves 6 lines overall. Cc: Len Brown <lenb@kernel.org> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> -- I can take this in my driver-core tree if someone from ACPI acks it, otherwise, feel free to take it through the ACPI trees instead, just let me know. drivers/acpi/bgrt.c | 26 ++++++++++---------------- 1 file changed, 10 insertions(+), 16 deletions(-)
2012-09-29efi: Fix the ACPI BGRT driver for images located in EFI boot services memoryJosh Triplett1-67/+9
The ACPI BGRT driver accesses the BIOS logo image when it initializes. However, ACPI 5.0 (which introduces the BGRT) recommends putting the logo image in EFI boot services memory, so that the OS can reclaim that memory. Production systems follow this recommendation, breaking the ACPI BGRT driver. Move the bulk of the BGRT code to run during a new EFI late initialization phase, which occurs after switching EFI to virtual mode, and after initializing ACPI, but before freeing boot services memory. Copy the BIOS logo image to kernel memory at that point, and make it accessible to the BGRT driver. Rework the existing ACPI BGRT driver to act as a simple wrapper exposing that image (and the properties from the BGRT) via sysfs. Signed-off-by: Josh Triplett <josh@joshtriplett.org> Link: http://lkml.kernel.org/r/93ce9f823f1c1f3bb88bdd662cce08eee7a17f5d.1348876882.git.josh@joshtriplett.org Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-05-17acpi, bgrd: Add missing <linux/io.h> to drivers/acpi/bgrt.cH. Peter Anvin1-0/+1
The ACPI BGRT driver uses ioremap() and memcpy_fromio(), which means it needs to #include <linux/io.h>. [ hpa: This was hidden because <asm/acpi.h> used to include <asm/trampoline.h>, which then included <asm/io.h> ] Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Link: http://lkml.kernel.org/r/1336597442-9399-1-git-send-email-hpa@linux.intel.com Cc: Matthew Garrett <mjg@redhat.com> Cc: Len Brown <lenb@kernel.org>
2012-03-30ACPI: Add support for exposing BGRT dataMatthew Garrett1-0/+175
ACPI 5.0 adds the BGRT, a table that contains a pointer to the firmware boot splash and associated metadata. This simple driver exposes it via /sys/firmware/acpi in order to allow bootsplash applications to draw their splash around the firmware image and reduce the number of jarring graphical transitions during boot. Signed-off-by: Matthew Garrett <mjg@redhat.com> Signed-off-by: Len Brown <len.brown@intel.com>