diff options
| author | Greg Kurz <groug@kaod.org> | 2019-02-19 18:18:03 +0100 |
|---|---|---|
| committer | David Gibson <david@gibson.dropbear.id.au> | 2019-02-26 09:21:25 +1100 |
| commit | 6cead90c5c9c462c56ddc41a0bd0b4cfef9f62a8 (patch) | |
| tree | d1e5651c0c61339b3d86c61e1c2981a561c4d6bc /hw/intc/xics.c | |
| parent | 09d876ce2c8ea3efd34e02d898c3122e04b814bc (diff) | |
xics: Write source state to KVM at claim time
The pseries machine only uses LSIs to support legacy PCI devices. Every
PHB claims 4 LSIs at realize time. When using in-kernel XICS (or upcoming
in-kernel XIVE), QEMU synchronizes the state of all irqs, including these
LSIs, later on at machine reset.
In order to support PHB hotplug, we need a way to tell KVM about the LSIs
that doesn't require a machine reset. An easy way to do that is to always
inform KVM when an interrupt is claimed, which really isn't a performance
path.
Signed-off-by: Greg Kurz <groug@kaod.org>
Message-Id: <155059668360.1466090.5969630516627776426.stgit@bahia.lab.toulouse-stg.fr.ibm.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Diffstat (limited to 'hw/intc/xics.c')
| -rw-r--r-- | hw/intc/xics.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/hw/intc/xics.c b/hw/intc/xics.c index 767fdeb829..af7dc709ab 100644 --- a/hw/intc/xics.c +++ b/hw/intc/xics.c @@ -758,6 +758,10 @@ void ics_set_irq_type(ICSState *ics, int srcno, bool lsi) ics->irqs[srcno].flags |= lsi ? XICS_FLAGS_IRQ_LSI : XICS_FLAGS_IRQ_MSI; + + if (kvm_irqchip_in_kernel()) { + ics_set_kvm_state_one(ics, srcno); + } } static void xics_register_types(void) |