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author | Linus Torvalds <torvalds@linux-foundation.org> | 2015-02-13 09:55:09 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-02-13 09:55:09 -0800 |
commit | b9085bcbf5f43adf60533f9b635b2e7faeed0fe9 (patch) | |
tree | e397abf5682a45c096e75b3d0fa99c8e228425fc /Documentation/virtual/kvm/devices/arm-vgic.txt | |
parent | c7d7b98671552abade78834c522b7308bda73c0d (diff) | |
parent | 6557bada461afeaa920a189fae2cff7c8fdce39f (diff) | |
download | linux-stable-b9085bcbf5f43adf60533f9b635b2e7faeed0fe9.tar.gz linux-stable-b9085bcbf5f43adf60533f9b635b2e7faeed0fe9.tar.bz2 linux-stable-b9085bcbf5f43adf60533f9b635b2e7faeed0fe9.zip |
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull KVM update from Paolo Bonzini:
"Fairly small update, but there are some interesting new features.
Common:
Optional support for adding a small amount of polling on each HLT
instruction executed in the guest (or equivalent for other
architectures). This can improve latency up to 50% on some
scenarios (e.g. O_DSYNC writes or TCP_RR netperf tests). This
also has to be enabled manually for now, but the plan is to
auto-tune this in the future.
ARM/ARM64:
The highlights are support for GICv3 emulation and dirty page
tracking
s390:
Several optimizations and bugfixes. Also a first: a feature
exposed by KVM (UUID and long guest name in /proc/sysinfo) before
it is available in IBM's hypervisor! :)
MIPS:
Bugfixes.
x86:
Support for PML (page modification logging, a new feature in
Broadwell Xeons that speeds up dirty page tracking), nested
virtualization improvements (nested APICv---a nice optimization),
usual round of emulation fixes.
There is also a new option to reduce latency of the TSC deadline
timer in the guest; this needs to be tuned manually.
Some commits are common between this pull and Catalin's; I see you
have already included his tree.
Powerpc:
Nothing yet.
The KVM/PPC changes will come in through the PPC maintainers,
because I haven't received them yet and I might end up being
offline for some part of next week"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (130 commits)
KVM: ia64: drop kvm.h from installed user headers
KVM: x86: fix build with !CONFIG_SMP
KVM: x86: emulate: correct page fault error code for NoWrite instructions
KVM: Disable compat ioctl for s390
KVM: s390: add cpu model support
KVM: s390: use facilities and cpu_id per KVM
KVM: s390/CPACF: Choose crypto control block format
s390/kernel: Update /proc/sysinfo file with Extended Name and UUID
KVM: s390: reenable LPP facility
KVM: s390: floating irqs: fix user triggerable endless loop
kvm: add halt_poll_ns module parameter
kvm: remove KVM_MMIO_SIZE
KVM: MIPS: Don't leak FPU/DSP to guest
KVM: MIPS: Disable HTW while in guest
KVM: nVMX: Enable nested posted interrupt processing
KVM: nVMX: Enable nested virtual interrupt delivery
KVM: nVMX: Enable nested apic register virtualization
KVM: nVMX: Make nested control MSRs per-cpu
KVM: nVMX: Enable nested virtualize x2apic mode
KVM: nVMX: Prepare for using hardware MSR bitmap
...
Diffstat (limited to 'Documentation/virtual/kvm/devices/arm-vgic.txt')
-rw-r--r-- | Documentation/virtual/kvm/devices/arm-vgic.txt | 37 |
1 files changed, 35 insertions, 2 deletions
diff --git a/Documentation/virtual/kvm/devices/arm-vgic.txt b/Documentation/virtual/kvm/devices/arm-vgic.txt index df8b0c7540b6..3fb905429e8a 100644 --- a/Documentation/virtual/kvm/devices/arm-vgic.txt +++ b/Documentation/virtual/kvm/devices/arm-vgic.txt @@ -3,22 +3,42 @@ ARM Virtual Generic Interrupt Controller (VGIC) Device types supported: KVM_DEV_TYPE_ARM_VGIC_V2 ARM Generic Interrupt Controller v2.0 + KVM_DEV_TYPE_ARM_VGIC_V3 ARM Generic Interrupt Controller v3.0 Only one VGIC instance may be instantiated through either this API or the legacy KVM_CREATE_IRQCHIP api. The created VGIC will act as the VM interrupt controller, requiring emulated user-space devices to inject interrupts to the VGIC instead of directly to CPUs. +Creating a guest GICv3 device requires a host GICv3 as well. +GICv3 implementations with hardware compatibility support allow a guest GICv2 +as well. + Groups: KVM_DEV_ARM_VGIC_GRP_ADDR Attributes: KVM_VGIC_V2_ADDR_TYPE_DIST (rw, 64-bit) Base address in the guest physical address space of the GIC distributor - register mappings. + register mappings. Only valid for KVM_DEV_TYPE_ARM_VGIC_V2. + This address needs to be 4K aligned and the region covers 4 KByte. KVM_VGIC_V2_ADDR_TYPE_CPU (rw, 64-bit) Base address in the guest physical address space of the GIC virtual cpu - interface register mappings. + interface register mappings. Only valid for KVM_DEV_TYPE_ARM_VGIC_V2. + This address needs to be 4K aligned and the region covers 4 KByte. + + KVM_VGIC_V3_ADDR_TYPE_DIST (rw, 64-bit) + Base address in the guest physical address space of the GICv3 distributor + register mappings. Only valid for KVM_DEV_TYPE_ARM_VGIC_V3. + This address needs to be 64K aligned and the region covers 64 KByte. + + KVM_VGIC_V3_ADDR_TYPE_REDIST (rw, 64-bit) + Base address in the guest physical address space of the GICv3 + redistributor register mappings. There are two 64K pages for each + VCPU and all of the redistributor pages are contiguous. + Only valid for KVM_DEV_TYPE_ARM_VGIC_V3. + This address needs to be 64K aligned. + KVM_DEV_ARM_VGIC_GRP_DIST_REGS Attributes: @@ -36,6 +56,7 @@ Groups: the register. Limitations: - Priorities are not implemented, and registers are RAZ/WI + - Currently only implemented for KVM_DEV_TYPE_ARM_VGIC_V2. Errors: -ENODEV: Getting or setting this register is not yet supported -EBUSY: One or more VCPUs are running @@ -68,6 +89,7 @@ Groups: Limitations: - Priorities are not implemented, and registers are RAZ/WI + - Currently only implemented for KVM_DEV_TYPE_ARM_VGIC_V2. Errors: -ENODEV: Getting or setting this register is not yet supported -EBUSY: One or more VCPUs are running @@ -81,3 +103,14 @@ Groups: -EINVAL: Value set is out of the expected range -EBUSY: Value has already be set, or GIC has already been initialized with default values. + + KVM_DEV_ARM_VGIC_GRP_CTRL + Attributes: + KVM_DEV_ARM_VGIC_CTRL_INIT + request the initialization of the VGIC, no additional parameter in + kvm_device_attr.addr. + Errors: + -ENXIO: VGIC not properly configured as required prior to calling + this attribute + -ENODEV: no online VCPU + -ENOMEM: memory shortage when allocating vgic internal data |