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x86/early-quirks: export the stolen region as a resource

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We duplicate the stolen discovery code in early-quirks and in i915,
however if we just export the region as a resource from early-quirks we
can nuke the duplication.

Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: x86@kernel.org
Cc: linux-kernel@vger.kernel.org
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171211151822.20953-3-matthew.auld@intel.com
This commit is contained in:
Matthew Auld 2017-12-11 15:18:15 +00:00 committed by Joonas Lahtinen
parent 6f9fa996c9
commit 55f56fc460
2 changed files with 12 additions and 2 deletions
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11
arch/x86/kernel/early-quirks.c
View file

@ -532,6 +532,9 @@ static const struct pci_device_id intel_early_ids[] __initconst = {
INTEL_CNL_IDS(&gen9_early_ops),
};
struct resource intel_graphics_stolen_res __ro_after_init = DEFINE_RES_MEM(0, 0);
EXPORT_SYMBOL(intel_graphics_stolen_res);
static void __init
intel_graphics_stolen(int num, int slot, int func,
const struct intel_early_ops *early_ops)
@ -546,8 +549,12 @@ intel_graphics_stolen(int num, int slot, int func,
return;
end = base + size - 1;
printk(KERN_INFO "Reserving Intel graphics memory at %pa-%pa\n",
&base, &end);
intel_graphics_stolen_res.start = base;
intel_graphics_stolen_res.end = end;
printk(KERN_INFO "Reserving Intel graphics memory at %pR\n",
&intel_graphics_stolen_res);
/* Mark this space as reserved */
e820__range_add(base, size, E820_TYPE_RESERVED);

3
include/drm/i915_drm.h
View file

@ -36,6 +36,9 @@ extern bool i915_gpu_lower(void);
extern bool i915_gpu_busy(void);
extern bool i915_gpu_turbo_disable(void);
/* Exported from arch/x86/kernel/early-quirks.c */
extern struct resource intel_graphics_stolen_res;
/*
* The Bridge device's PCI config space has information about the
* fb aperture size and the amount of pre-reserved memory.