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spapr/xive: Fix migration of hot-plugged CPUs

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The migration sequence of a guest using the XIVE exploitation mode
relies on the fact that the states of all devices are restored before
the machine is. This is not true for hot-plug devices such as CPUs
which state come after the machine. This breaks migration because the
thread interrupt context registers are not correctly set.

Fix migration of hotplugged CPUs by restoring their context in the
'post_load' handler of the XiveTCTX model.

Fixes: 277dd3d771 ("spapr/xive: add migration support for KVM")
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20190813064853.29310-1-clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Cédric Le Goater 2019-08-13 08:48:53 +02:00 • committed by David Gibson
parent 25c9780d38
commit 310cda5b5e
3 changed files with 38 additions and 3 deletions
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1
include/hw/ppc/xive.h
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@ -438,5 +438,6 @@ void kvmppc_xive_source_set_irq(void *opaque, int srcno, int val);
void kvmppc_xive_cpu_connect(XiveTCTX *tctx, Error **errp);
void kvmppc_xive_cpu_synchronize_state(XiveTCTX *tctx, Error **errp);
void kvmppc_xive_cpu_get_state(XiveTCTX *tctx, Error **errp);
void kvmppc_xive_cpu_set_state(XiveTCTX *tctx, Error **errp);
#endif /* PPC_XIVE_H */