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spapr/xive: add state synchronization with KVM

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This extends the KVM XIVE device backend with 'synchronize_state'
methods used to retrieve the state from KVM. The HW state of the
sources, the KVM device and the thread interrupt contexts are
collected for the monitor usage and also migration.

These get operations rely on their KVM counterpart in the host kernel
which acts as a proxy for OPAL, the host firmware. The set operations
will be added for migration support later.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20190513084245.25755-5-clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Cédric Le Goater 2019-05-13 10:42:35 +02:00 • committed by David Gibson
parent 0c575703e4
commit 7bfc759c02
5 changed files with 119 additions and 7 deletions
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17
hw/intc/spapr_xive.c
View file

@ -40,13 +40,6 @@
#define SPAPR_XIVE_NVT_BASE 0x400
/*
* The sPAPR machine has a unique XIVE IC device. Assign a fixed value
* to the controller block id value. It can nevertheless be changed
* for testing purpose.
*/
#define SPAPR_XIVE_BLOCK_ID 0x0
/*
* sPAPR NVT and END indexing helpers
*/
@ -157,6 +150,16 @@ void spapr_xive_pic_print_info(SpaprXive *xive, Monitor *mon)
XiveSource *xsrc = &xive->source;
int i;
if (kvm_irqchip_in_kernel()) {
Error *local_err = NULL;
kvmppc_xive_synchronize_state(xive, &local_err);
if (local_err) {
error_report_err(local_err);
return;
}
}
monitor_printf(mon, " LISN PQ EISN CPU/PRIO EQ\n");
for (i = 0; i < xive->nr_irqs; i++) {