Commit-ID: 5f95078a35e5857afa294a558c277196cf079668 Gitweb: http://git.kernel.org/tip/5f95078a35e5857afa294a558c277196cf079668 Author: Mike Travis <travis@xxxxxxx> AuthorDate: Tue, 2 Feb 2010 14:38:16 -0800 Committer: H. Peter Anvin <hpa@xxxxxxxxx> CommitDate: Fri, 5 Feb 2010 14:05:41 -0800 vgaarb: Add user selectability of the number of GPUS in a system 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> LKML-Reference: <201002022238.o12McG1F018733@xxxxxxxxxxxxxxxxxxxxxxxxxx> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Cc: Robin Holt <holt@xxxxxxx> Cc: Jack Steiner <steiner@xxxxxxx> Cc: Ingo Molnar <mingo@xxxxxxx> Cc: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx> Cc: David Airlie <airlied@xxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Signed-off-by: H. Peter Anvin <hpa@xxxxxxxxx> --- drivers/gpu/vga/Kconfig | 8 ++++++++ drivers/gpu/vga/vgaarb.c | 4 ++++ 2 files changed, 12 insertions(+), 0 deletions(-) diff --git a/drivers/gpu/vga/Kconfig b/drivers/gpu/vga/Kconfig index 790e675..cb1dcfe 100644 --- a/drivers/gpu/vga/Kconfig +++ b/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 --git a/drivers/gpu/vga/vgaarb.c b/drivers/gpu/vga/vgaarb.c index ba7fa9e..541fdfd 100644 --- a/drivers/gpu/vga/vgaarb.c +++ b/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) /* -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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