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| author | Radim Krčmář <rkrcmar@redhat.com> | 2017-09-07 18:22:04 +0200 |
|---|---|---|
| committer | Radim Krčmář <rkrcmar@redhat.com> | 2017-09-07 18:22:04 +0200 |
| commit | 082d3900a446283a6ec15917a1682db2cdf17621 (patch) | |
| tree | 1c6df56e1c51d30de19247b11ce5f5c329e16da6 /Documentation/virtual | |
| parent | Merge tag 'kvm-s390-next-4.14-2' of git://git.kernel.org/pub/scm/linux/kernel... (diff) | |
| parent | KVM: arm/arm64: Support uaccess of GICC_APRn (diff) | |
| download | linux-082d3900a446283a6ec15917a1682db2cdf17621.tar.xz linux-082d3900a446283a6ec15917a1682db2cdf17621.zip | |
Merge tag 'kvm-arm-for-v4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm
KVM/ARM Changes for v4.14
Two minor cleanups and improvements, a fix for decoding external abort
types from guests, and added support for migrating the active priority
of interrupts when running a GICv2 guest on a GICv3 host.
Diffstat (limited to 'Documentation/virtual')
| -rw-r--r-- | Documentation/virtual/kvm/devices/arm-vgic.txt | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/virtual/kvm/devices/arm-vgic.txt b/Documentation/virtual/kvm/devices/arm-vgic.txt index b2f60ca8b60c..b3ce12643553 100644 --- a/Documentation/virtual/kvm/devices/arm-vgic.txt +++ b/Documentation/virtual/kvm/devices/arm-vgic.txt @@ -83,6 +83,11 @@ Groups: Bits for undefined preemption levels are RAZ/WI. + Note that this differs from a CPU's view of the APRs on hardware in which + a GIC without the security extensions expose group 0 and group 1 active + priorities in separate register groups, whereas we show a combined view + similar to GICv2's GICH_APR. + For historical reasons and to provide ABI compatibility with userspace we export the GICC_PMR register in the format of the GICH_VMCR.VMPriMask field in the lower 5 bits of a word, meaning that userspace must always |