Andre Przywara 7d450e2821 KVM: arm/arm64: vgic-new: Add userland access to VGIC dist registers ... Userland may want to save and restore the state of the in-kernel VGIC, so we provide the code which takes a userland request and translate that into calls to our MMIO framework. From Christoffer: When accessing the VGIC state from userspace we really don't want a VCPU to be messing with the state at the same time, and the API specifies that we should return -EBUSY if any VCPUs are running. Check and prevent VCPUs from running by grabbing their mutexes, one by one, and error out if we fail. (Note: This could potentially be simplified to just do a simple check and see if any VCPUs are running, and return -EBUSY then, without enforcing the locking throughout the duration of the uaccess, if we think that taking/releasing all these mutexes for every single GIC register access is too heavyweight.) Signed-off-by: Andre Przywara <andre.przywara@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>		2016-05-20 15:40:03 +02:00
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kvm	KVM: arm/arm64: vgic-new: Add userland access to VGIC dist registers	2016-05-20 15:40:03 +02:00
lib	virt: IRQ bypass manager	2015-10-01 15:06:43 +02:00
Makefile	virt: Add virt directory to the top Makefile	2015-10-01 15:06:44 +02:00