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spapr: migration support for CAS-negotiated option vectors

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With the additional of the OV5_HP_EVT option vector, we now have
certain functionality (namely, memory unplug) that checks at run-time
for whether or not the guest negotiated the option via CAS. Because
we don't currently migrate these negotiated values, we are unable
to unplug memory from a guest after it's been migrated until after
the guest is rebooted and CAS-negotiation is repeated.

This patch fixes this by adding CAS-negotiated options to the
migration stream. We do this using a subsection, since the
negotiated value of OV5_HP_EVT is the only option currently needed
to maintain proper functionality for a running guest.

Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Michael Roth 2016-11-17 19:40:27 -06:00 • committed by David Gibson
parent 171da9d5db
commit 62ef3760d4
3 changed files with 82 additions and 0 deletions
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4
include/hw/ppc/spapr_ovec.h
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@ -37,6 +37,7 @@
#define _SPAPR_OVEC_H
#include "cpu.h"
#include "migration/vmstate.h"
typedef struct sPAPROptionVector sPAPROptionVector;
@ -64,4 +65,7 @@ sPAPROptionVector *spapr_ovec_parse_vector(target_ulong table_addr, int vector);
int spapr_ovec_populate_dt(void *fdt, int fdt_offset,
sPAPROptionVector *ov, const char *name);
/* migration */
extern const VMStateDescription vmstate_spapr_ovec;
#endif /* !defined (_SPAPR_OVEC_H) */