kernel.git/Documentation/virt/kvm/devices, branch linux-5.5.y

Merge tag 'kvmarm-5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD

2019-11-21T08:58:35Z

KVM/arm updates for Linux 5.5: - Allow non-ISV data aborts to be reported to userspace - Allow injection of data aborts from userspace - Expose stolen time to guests - GICv4 performance improvements - vgic ITS emulation fixes - Simplify FWB handling - Enable halt pool counters - Make the emulated timer PREEMPT_RT compliant Conflicts: include/uapi/linux/kvm.h

KVM: PPC: Book3S HV: XIVE: Allow userspace to set the # of VPs

2019-10-22T05:29:02Z

Add a new attribute to both XIVE and XICS-on-XIVE KVM devices so that userspace can tell how many interrupt servers it needs. If a VM needs less than the current default of KVM_MAX_VCPUS (2048), we can allocate less VPs in OPAL. Combined with a core stride (VSMT) that matches the number of guest threads per core, this may substantially increases the number of VMs that can run concurrently with an in-kernel XIVE device. Since the legacy XIVE KVM device is exposed to userspace through the XICS KVM API, a new attribute group is added to it for this purpose. While here, fix the syntax of the existing KVM_DEV_XICS_GRP_SOURCES in the XICS documentation. Signed-off-by: Greg Kurz Reviewed-by: Cédric Le Goater Signed-off-by: Paul Mackerras

KVM: arm64: Document PV-time interface

2019-10-21T18:20:25Z

Introduce a paravirtualization interface for KVM/arm64 based on the "Arm Paravirtualized Time for Arm-Base Systems" specification DEN 0057A. This only adds the details about "Stolen Time" as the details of "Live Physical Time" have not been fully agreed. User space can specify a reserved area of memory for the guest and inform KVM to populate the memory with information on time that the host kernel has stolen from the guest. A hypercall interface is provided for the guest to interrogate the hypervisor's support for this interface and the location of the shared memory structures. Signed-off-by: Steven Price Signed-off-by: Marc Zyngier

Documentation: move Documentation/virtual to Documentation/virt

2019-07-24T08:52:11Z

Renaming docs seems to be en vogue at the moment, so fix on of the grossly misnamed directories. We usually never use "virtual" as a shortcut for virtualization in the kernel, but always virt, as seen in the virt/ top-level directory. Fix up the documentation to match that. Fixes: ed16648eb5b8 ("Move kvm, uml, and lguest subdirectories under a common "virtual" directory, I.E:") Signed-off-by: Christoph Hellwig Signed-off-by: Paolo Bonzini