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authorLinus Torvalds <torvalds@linux-foundation.org>2017-11-16 13:00:24 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2017-11-16 13:00:24 -0800
commit974aa5630b318938273d7efe7a2cf031c7b927db (patch)
treeb79803c07b9c16d87058ce69f80ebe173cdfd838 /Documentation
parent441692aafc1731087bbaf657a8b6059d95c2a6df (diff)
parenta6014f1ab7088dc02b58991cfb6b32a34afdbf12 (diff)
downloadlinux-974aa5630b318938273d7efe7a2cf031c7b927db.tar.bz2
Merge tag 'kvm-4.15-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull KVM updates from Radim Krčmář: "First batch of KVM changes for 4.15 Common: - Python 3 support in kvm_stat - Accounting of slabs to kmemcg ARM: - Optimized arch timer handling for KVM/ARM - Improvements to the VGIC ITS code and introduction of an ITS reset ioctl - Unification of the 32-bit fault injection logic - More exact external abort matching logic PPC: - Support for running hashed page table (HPT) MMU mode on a host that is using the radix MMU mode; single threaded mode on POWER 9 is added as a pre-requisite - Resolution of merge conflicts with the last second 4.14 HPT fixes - Fixes and cleanups s390: - Some initial preparation patches for exitless interrupts and crypto - New capability for AIS migration - Fixes x86: - Improved emulation of LAPIC timer mode changes, MCi_STATUS MSRs, and after-reset state - Refined dependencies for VMX features - Fixes for nested SMI injection - A lot of cleanups" * tag 'kvm-4.15-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (89 commits) KVM: s390: provide a capability for AIS state migration KVM: s390: clear_io_irq() requests are not expected for adapter interrupts KVM: s390: abstract conversion between isc and enum irq_types KVM: s390: vsie: use common code functions for pinning KVM: s390: SIE considerations for AP Queue virtualization KVM: s390: document memory ordering for kvm_s390_vcpu_wakeup KVM: PPC: Book3S HV: Cosmetic post-merge cleanups KVM: arm/arm64: fix the incompatible matching for external abort KVM: arm/arm64: Unify 32bit fault injection KVM: arm/arm64: vgic-its: Implement KVM_DEV_ARM_ITS_CTRL_RESET KVM: arm/arm64: Document KVM_DEV_ARM_ITS_CTRL_RESET KVM: arm/arm64: vgic-its: Free caches when GITS_BASER Valid bit is cleared KVM: arm/arm64: vgic-its: New helper functions to free the caches KVM: arm/arm64: vgic-its: Remove kvm_its_unmap_device arm/arm64: KVM: Load the timer state when enabling the timer KVM: arm/arm64: Rework kvm_timer_should_fire KVM: arm/arm64: Get rid of kvm_timer_flush_hwstate KVM: arm/arm64: Avoid phys timer emulation in vcpu entry/exit KVM: arm/arm64: Move phys_timer_emulate function KVM: arm/arm64: Use kvm_arm_timer_set/get_reg for guest register traps ...
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/virtual/kvm/api.txt13
-rw-r--r--Documentation/virtual/kvm/devices/arm-vgic-its.txt20
-rw-r--r--Documentation/virtual/kvm/devices/s390_flic.txt5
3 files changed, 38 insertions, 0 deletions
diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt
index e63a35fafef0..f670e4b9e7f3 100644
--- a/Documentation/virtual/kvm/api.txt
+++ b/Documentation/virtual/kvm/api.txt
@@ -1124,10 +1124,14 @@ guest physical address space and must not conflict with any memory slot
or any mmio address. The guest may malfunction if it accesses this memory
region.
+Setting the address to 0 will result in resetting the address to its default
+(0xfffbc000).
+
This ioctl is required on Intel-based hosts. This is needed on Intel hardware
because of a quirk in the virtualization implementation (see the internals
documentation when it pops into existence).
+Fails if any VCPU has already been created.
4.41 KVM_SET_BOOT_CPU_ID
@@ -4347,3 +4351,12 @@ This capability indicates that userspace can load HV_X64_MSR_VP_INDEX msr. Its
value is used to denote the target vcpu for a SynIC interrupt. For
compatibilty, KVM initializes this msr to KVM's internal vcpu index. When this
capability is absent, userspace can still query this msr's value.
+
+8.13 KVM_CAP_S390_AIS_MIGRATION
+
+Architectures: s390
+Parameters: none
+
+This capability indicates if the flic device will be able to get/set the
+AIS states for migration via the KVM_DEV_FLIC_AISM_ALL attribute and allows
+to discover this without having to create a flic device.
diff --git a/Documentation/virtual/kvm/devices/arm-vgic-its.txt b/Documentation/virtual/kvm/devices/arm-vgic-its.txt
index eb06beb75960..8d5830eab26a 100644
--- a/Documentation/virtual/kvm/devices/arm-vgic-its.txt
+++ b/Documentation/virtual/kvm/devices/arm-vgic-its.txt
@@ -33,6 +33,10 @@ Groups:
request the initialization of the ITS, no additional parameter in
kvm_device_attr.addr.
+ KVM_DEV_ARM_ITS_CTRL_RESET
+ reset the ITS, no additional parameter in kvm_device_attr.addr.
+ See "ITS Reset State" section.
+
KVM_DEV_ARM_ITS_SAVE_TABLES
save the ITS table data into guest RAM, at the location provisioned
by the guest in corresponding registers/table entries.
@@ -157,3 +161,19 @@ Then vcpus can be started.
- pINTID is the physical LPI ID; if zero, it means the entry is not valid
and other fields are not meaningful.
- ICID is the collection ID
+
+ ITS Reset State:
+ ----------------
+
+RESET returns the ITS to the same state that it was when first created and
+initialized. When the RESET command returns, the following things are
+guaranteed:
+
+- The ITS is not enabled and quiescent
+ GITS_CTLR.Enabled = 0 .Quiescent=1
+- There is no internally cached state
+- No collection or device table are used
+ GITS_BASER<n>.Valid = 0
+- GITS_CBASER = 0, GITS_CREADR = 0, GITS_CWRITER = 0
+- The ABI version is unchanged and remains the one set when the ITS
+ device was first created.
diff --git a/Documentation/virtual/kvm/devices/s390_flic.txt b/Documentation/virtual/kvm/devices/s390_flic.txt
index 2f1cbf1301d2..a4e20a090174 100644
--- a/Documentation/virtual/kvm/devices/s390_flic.txt
+++ b/Documentation/virtual/kvm/devices/s390_flic.txt
@@ -151,8 +151,13 @@ struct kvm_s390_ais_all {
to an ISC (MSB0 bit 0 to ISC 0 and so on). The combination of simm bit and
nimm bit presents AIS mode for a ISC.
+ KVM_DEV_FLIC_AISM_ALL is indicated by KVM_CAP_S390_AIS_MIGRATION.
+
Note: The KVM_SET_DEVICE_ATTR/KVM_GET_DEVICE_ATTR device ioctls executed on
FLIC with an unknown group or attribute gives the error code EINVAL (instead of
ENXIO, as specified in the API documentation). It is not possible to conclude
that a FLIC operation is unavailable based on the error code resulting from a
usage attempt.
+
+Note: The KVM_DEV_FLIC_CLEAR_IO_IRQ ioctl will return EINVAL in case a zero
+schid is specified.