diff options
| author | Bjorn Helgaas <bhelgaas@google.com> | 2022-02-24 16:47:43 -0600 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2022-03-09 18:30:46 -0600 |
| commit | 1d38fe6ee6a874675ca3bba6b48e69a0e6176ffc (patch) | |
| tree | 0cd66e09cc52f37ba2863eb19e04e0cefd90d8e0 /drivers/pci/Kconfig | |
| parent | e783362eb54cd99b2cac8b3a9aeac942e6f6ac07 (diff) | |
PCI/VGA: Move vgaarb to drivers/pci
The VGA arbiter is really PCI-specific and doesn't depend on any GPU
things. Move it to the PCI subsystem.
Note that misc_init() must be called before vga_arb_device_init(). These
are both subsys_initcalls, so this ordering depends on the link order,
which is determined by drivers/Makefile:
obj-y += pci/
obj-y += char/ <-- misc_init()
obj-y += gpu/ <-- vga_arb_device_init() (before this commit)
The drivers/pci/ subsys_initcalls are called *before* misc_init(), so
convert vga_arb_device_init() to subsys_initcall_sync(), which is called
after *all* subsys_initcalls.
Link: https://lore.kernel.org/r/20220224224753.297579-2-helgaas@kernel.org
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci/Kconfig')
| -rw-r--r-- | drivers/pci/Kconfig | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig index d98fafdd0f99..133c73207782 100644 --- a/drivers/pci/Kconfig +++ b/drivers/pci/Kconfig @@ -252,6 +252,25 @@ config PCIE_BUS_PEER2PEER endchoice +config VGA_ARB + bool "VGA Arbitration" if EXPERT + default y + depends on (PCI && !S390) + help + Some "legacy" VGA devices implemented on PCI typically have the same + hard-decoded addresses as they did on ISA. When multiple PCI devices + are accessed at same time they need some kind of coordination. Please + see Documentation/gpu/vgaarbiter.rst for more details. Select this to + enable VGA arbiter. + +config VGA_ARB_MAX_GPUS + int "Maximum number of GPUs" + default 16 + 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. + source "drivers/pci/hotplug/Kconfig" source "drivers/pci/controller/Kconfig" source "drivers/pci/endpoint/Kconfig" |