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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2018-01-12 13:37:12 +1100 |
|---|---|---|
| committer | Paul Mackerras <paulus@ozlabs.org> | 2018-01-19 12:10:21 +1100 |
| commit | bf4159da4751ab8eea43ca6e7c49193dbce8398c (patch) | |
| tree | f388b8cce6117fd8dd3d592dfa18d7d290ea35a9 /arch/powerpc/kvm/book3s_hv.c | |
| parent | c424c108233dc422a9a29ee833154006a5bdf9fc (diff) | |
| download | talos-obmc-linux-bf4159da4751ab8eea43ca6e7c49193dbce8398c.tar.gz talos-obmc-linux-bf4159da4751ab8eea43ca6e7c49193dbce8398c.zip | |
KVM: PPC: Book3S HV: Enable use of the new XIVE "single escalation" feature
That feature, provided by Power9 DD2.0 and later, when supported
by newer OPAL versions, allows us to sacrifice a queue (priority 7)
in favor of merging all the escalation interrupts of the queues
of a single VP into a single interrupt.
This reduces the number of host interrupts used up by KVM guests
especially when those guests use multiple priorities.
It will also enable a future change to control the masking of the
escalation interrupts more precisely to avoid spurious ones.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Diffstat (limited to 'arch/powerpc/kvm/book3s_hv.c')
0 files changed, 0 insertions, 0 deletions
