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authorMarc Zyngier <marc.zyngier@arm.com>2014-07-08 15:09:07 +0400
committerChristoffer Dall <christoffer.dall@linaro.org>2014-09-19 05:48:58 +0400
commita98f26f183801685ef57333de4bafd4bbc692c7c (patch)
tree8b33a5d7d13d8c2f507223b548b766ba16d559b1 /Documentation/virtual
parent4956f2bc1fdee4bc336532f3f34635a8534cedfd (diff)
downloadlinux-a98f26f183801685ef57333de4bafd4bbc692c7c.tar.xz
arm/arm64: KVM: vgic: make number of irqs a configurable attribute
In order to make the number of interrupts configurable, use the new fancy device management API to add KVM_DEV_ARM_VGIC_GRP_NR_IRQS as a VGIC configurable attribute. Userspace can now specify the exact size of the GIC (by increments of 32 interrupts). Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'Documentation/virtual')
-rw-r--r--Documentation/virtual/kvm/devices/arm-vgic.txt10
1 files changed, 10 insertions, 0 deletions
diff --git a/Documentation/virtual/kvm/devices/arm-vgic.txt b/Documentation/virtual/kvm/devices/arm-vgic.txt
index 7f4e91b1316b..df8b0c7540b6 100644
--- a/Documentation/virtual/kvm/devices/arm-vgic.txt
+++ b/Documentation/virtual/kvm/devices/arm-vgic.txt
@@ -71,3 +71,13 @@ Groups:
Errors:
-ENODEV: Getting or setting this register is not yet supported
-EBUSY: One or more VCPUs are running
+
+ KVM_DEV_ARM_VGIC_GRP_NR_IRQS
+ Attributes:
+ A value describing the number of interrupts (SGI, PPI and SPI) for
+ this GIC instance, ranging from 64 to 1024, in increments of 32.
+
+ Errors:
+ -EINVAL: Value set is out of the expected range
+ -EBUSY: Value has already be set, or GIC has already been initialized
+ with default values.