174178fed3
This patch enables irqfd on arm/arm64. Both irqfd and resamplefd are supported. Injection is implemented in vgic.c without routing. This patch enables CONFIG_HAVE_KVM_EVENTFD and CONFIG_HAVE_KVM_IRQFD. KVM_CAP_IRQFD is now advertised. KVM_CAP_IRQFD_RESAMPLE capability automatically is advertised as soon as CONFIG_HAVE_KVM_IRQFD is set. Irqfd injection is restricted to SPI. The rationale behind not supporting PPI irqfd injection is that any device using a PPI would be a private-to-the-CPU device (timer for instance), so its state would have to be context-switched along with the VCPU and would require in-kernel wiring anyhow. It is not a relevant use case for irqfds. Signed-off-by: Eric Auger <eric.auger@linaro.org> Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Acked-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
59 lines
1.4 KiB
Plaintext
59 lines
1.4 KiB
Plaintext
#
|
|
# KVM configuration
|
|
#
|
|
|
|
source "virt/kvm/Kconfig"
|
|
|
|
menuconfig VIRTUALIZATION
|
|
bool "Virtualization"
|
|
---help---
|
|
Say Y here to get to see options for using your Linux host to run
|
|
other operating systems inside virtual machines (guests).
|
|
This option alone does not add any kernel code.
|
|
|
|
If you say N, all options in this submenu will be skipped and
|
|
disabled.
|
|
|
|
if VIRTUALIZATION
|
|
|
|
config KVM
|
|
bool "Kernel-based Virtual Machine (KVM) support"
|
|
depends on MMU && OF
|
|
select PREEMPT_NOTIFIERS
|
|
select ANON_INODES
|
|
select HAVE_KVM_CPU_RELAX_INTERCEPT
|
|
select HAVE_KVM_ARCH_TLB_FLUSH_ALL
|
|
select KVM_MMIO
|
|
select KVM_ARM_HOST
|
|
select KVM_GENERIC_DIRTYLOG_READ_PROTECT
|
|
select SRCU
|
|
select MMU_NOTIFIER
|
|
select HAVE_KVM_EVENTFD
|
|
select HAVE_KVM_IRQFD
|
|
depends on ARM_VIRT_EXT && ARM_LPAE && ARM_ARCH_TIMER
|
|
---help---
|
|
Support hosting virtualized guest machines.
|
|
|
|
This module provides access to the hardware capabilities through
|
|
a character device node named /dev/kvm.
|
|
|
|
If unsure, say N.
|
|
|
|
config KVM_ARM_HOST
|
|
bool
|
|
---help---
|
|
Provides host support for ARM processors.
|
|
|
|
config KVM_ARM_MAX_VCPUS
|
|
int "Number maximum supported virtual CPUs per VM"
|
|
depends on KVM_ARM_HOST
|
|
default 4
|
|
help
|
|
Static number of max supported virtual CPUs per VM.
|
|
|
|
If you choose a high number, the vcpu structures will be quite
|
|
large, so only choose a reasonable number that you expect to
|
|
actually use.
|
|
|
|
endif # VIRTUALIZATION
|