The patch titled
vgaarb: add user selectability of the number of GPUS in a system
has been added to the -mm tree. Its filename is
vgaarb-add-user-selectability-of-the-number-of-gpus-in-a-system.patch
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------------------------------------------------------
Subject: vgaarb: add user selectability of the number of GPUS in a system
From: Mike Travis <travis@xxxxxxx>
Update the VGA Arbiter to allow the user to select the number of GPU's
supported in a system.
Signed-off-by: Mike Travis <travis@xxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Robin Holt <holt@xxxxxxx>
Cc: H. Peter Anvin <hpa@xxxxxxxxx>
Cc: Jack Steiner <steiner@xxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/vga/Kconfig | 8 ++++++++
drivers/gpu/vga/vgaarb.c | 4 ++++
2 files changed, 12 insertions(+)
diff -puN drivers/gpu/vga/Kconfig~vgaarb-add-user-selectability-of-the-number-of-gpus-in-a-system drivers/gpu/vga/Kconfig
--- a/drivers/gpu/vga/Kconfig~vgaarb-add-user-selectability-of-the-number-of-gpus-in-a-system
+++ a/drivers/gpu/vga/Kconfig
@@ -8,3 +8,11 @@ config VGA_ARB
are accessed at same time they need some kind of coordination. Please
see Documentation/vgaarbiter.txt for more details. Select this to
enable VGA arbiter.
+
+config VGA_ARB_MAX_GPUS
+ int "Maximum number of GPUs"
+ default 64
+ depends on VGA_ARB
+ help
+ Reserves space in the kernel to maintain resource locking for
+ multiple GPUS. The overhead for each GPU is very small.
diff -puN drivers/gpu/vga/vgaarb.c~vgaarb-add-user-selectability-of-the-number-of-gpus-in-a-system drivers/gpu/vga/vgaarb.c
--- a/drivers/gpu/vga/vgaarb.c~vgaarb-add-user-selectability-of-the-number-of-gpus-in-a-system
+++ a/drivers/gpu/vga/vgaarb.c
@@ -688,7 +688,11 @@ EXPORT_SYMBOL(vga_client_register);
* the arbiter.
*/
+#ifdef CONFIG_VGA_ARB_MAX_GPUS
+#define MAX_USER_CARDS CONFIG_VGA_ARB_MAX_GPUS
+#else
#define MAX_USER_CARDS 16
+#endif
#define PCI_INVALID_CARD ((struct pci_dev *)-1UL)
/*
_
Patches currently in -mm which might be from travis@xxxxxxx are
pci-update-pci_set_vga_state-to-call-arch-functions.patch
x86_64-uv-update-uv-arch-to-target-legacy-vga-i-o-correctly.patch
vgaarb-fix-vga-arbiter-to-accept-pci-domains-other-than-0.patch
vgaarb-add-user-selectability-of-the-number-of-gpus-in-a-system.patch
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