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| author | Cédric Le Goater <clg@kaod.org> | 2019-04-18 13:39:38 +0300 |
|---|---|---|
| committer | Paul Mackerras <paulus@ozlabs.org> | 2019-04-30 12:35:16 +0300 |
| commit | 6520ca64cde71b75dae54f3fcb33517a93d82486 (patch) | |
| tree | 878b5eb4c434f2c5bf8fb112770149ecb688452a /Documentation/virtual | |
| parent | 39e9af3de5ca936098bc80ebe14401426673c208 (diff) | |
| download | linux-6520ca64cde71b75dae54f3fcb33517a93d82486.tar.xz | |
KVM: PPC: Book3S HV: XIVE: Add a mapping for the source ESB pages
Each source is associated with an Event State Buffer (ESB) with a
even/odd pair of pages which provides commands to manage the source:
to trigger, to EOI, to turn off the source for instance.
The custom VM fault handler will deduce the guest IRQ number from the
offset of the fault, and the ESB page of the associated XIVE interrupt
will be inserted into the VMA using the internal structure caching
information on the interrupts.
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 | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/virtual/kvm/devices/xive.txt b/Documentation/virtual/kvm/devices/xive.txt index 0cd7847ec38a..69ee62d3d4dc 100644 --- a/Documentation/virtual/kvm/devices/xive.txt +++ b/Documentation/virtual/kvm/devices/xive.txt @@ -36,6 +36,13 @@ the legacy interrupt mode, referred as XICS (POWER7/8). third (operating system) and the fourth (user level) are exposed the guest. + 2. Event State Buffer (ESB) + + Each source is associated with an Event State Buffer (ESB) with + either a pair of even/odd pair of pages which provides commands to + manage the source: to trigger, to EOI, to turn off the source for + instance. + * Groups: 1. KVM_DEV_XIVE_GRP_CTRL |