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migration: Include migration support for machine check handling

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This patch includes migration support for machine check
handling. Especially this patch blocks VM migration
requests until the machine check error handling is
complete as these errors are specific to the source
hardware and is irrelevant on the target hardware.

Signed-off-by: Aravinda Prasad <arawinda.p@gmail.com>
[Do not set FWNMI cap in post_load, now its done in .apply hook]
Signed-off-by: Ganesh Goudar <ganeshgr@linux.ibm.com>
Message-Id: <20200130184423.20519-7-ganeshgr@linux.ibm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Aravinda Prasad 2020-01-31 00:14:22 +05:30 • committed by David Gibson
parent f03496bc12
commit 2500fb423a
4 changed files with 66 additions and 1 deletions
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16
hw/ppc/spapr_events.c
View file

@ -43,6 +43,7 @@
#include "qemu/main-loop.h"
#include "hw/ppc/spapr_ovec.h"
#include <libfdt.h>
#include "migration/blocker.h"
#define RTAS_LOG_VERSION_MASK 0xff000000
#define RTAS_LOG_VERSION_6 0x06000000
@ -843,6 +844,8 @@ void spapr_mce_req_event(PowerPCCPU *cpu, bool recovered)
{
SpaprMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
CPUState *cs = CPU(cpu);
int ret;
Error *local_err = NULL;
if (spapr->guest_machine_check_addr == -1) {
/*
@ -872,8 +875,19 @@ void spapr_mce_req_event(PowerPCCPU *cpu, bool recovered)
return;
}
}
spapr->mc_status = cpu->vcpu_id;
ret = migrate_add_blocker(spapr->fwnmi_migration_blocker, &local_err);
if (ret == -EBUSY) {
/*
* We don't want to abort so we let the migration to continue.
* In a rare case, the machine check handler will run on the target.
* Though this is not preferable, it is better than aborting
* the migration or killing the VM.
*/
warn_report("Received a fwnmi while migration was in progress");
}
spapr->mc_status = cpu->vcpu_id;
spapr_mce_dispatch_elog(cpu, recovered);
}