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| author | Cédric Le Goater <clg@kaod.org> | 2019-04-18 12:39:32 +0200 |
|---|---|---|
| committer | Paul Mackerras <paulus@ozlabs.org> | 2019-04-30 19:35:16 +1000 |
| commit | 5ca806474859a0e94584b3a63f9509a25758408e (patch) | |
| tree | 6fdcc8070443e749d03f7e884890e626ca96fe6f /Documentation/virtual | |
| parent | 13ce3297c5766b9541b6a7a255794c5168a7ae1a (diff) | |
| download | linux-5ca806474859a0e94584b3a63f9509a25758408e.tar.bz2 | |
KVM: PPC: Book3S HV: XIVE: Add a global reset control
This control is to be used by the H_INT_RESET hcall from QEMU. Its
purpose is to clear all configuration of the sources and EQs. This is
necessary in case of a kexec (for a kdump kernel for instance) to make
sure that no remaining configuration is left from the previous boot
setup so that the new kernel can start safely from a clean state.
The queue 7 is ignored when the XIVE device is configured to run in
single escalation mode. Prio 7 is used by escalations.
The XIVE VP is kept enabled as the vCPU is still active and connected
to the XIVE device.
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Diffstat (limited to 'Documentation/virtual')
| -rw-r--r-- | Documentation/virtual/kvm/devices/xive.txt | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/virtual/kvm/devices/xive.txt b/Documentation/virtual/kvm/devices/xive.txt index cc13bfd5cf53..429cbc4cf960 100644 --- a/Documentation/virtual/kvm/devices/xive.txt +++ b/Documentation/virtual/kvm/devices/xive.txt @@ -17,6 +17,11 @@ the legacy interrupt mode, referred as XICS (POWER7/8). 1. KVM_DEV_XIVE_GRP_CTRL Provides global controls on the device + Attributes: + 1.1 KVM_DEV_XIVE_RESET (write only) + Resets the interrupt controller configuration for sources and event + queues. To be used by kexec and kdump. + Errors: none 2. KVM_DEV_XIVE_GRP_SOURCE (write only) Initializes a new source in the XIVE device and mask it. |