diff options
| author | Greg Kurz <groug@kaod.org> | 2018-05-03 23:16:59 +0200 |
|---|---|---|
| committer | David Gibson <david@gibson.dropbear.id.au> | 2018-05-04 15:00:37 +1000 |
| commit | 0550b1206a91d66051a21441a02c4ff126b531fe (patch) | |
| tree | 793f8e424ef737b07fff635f6d3d29bfe7e74c63 /hw/ppc | |
| parent | aef19c04bf88e0f5f936301e6c29b239e488fbc6 (diff) | |
spapr: don't advertise radix GTSE if max-compat-cpu < power9
On a POWER9 host, if a guest runs in pre POWER9 compat mode, it necessarily
uses the hash MMU mode. In this case, we shouldn't advertise radix GTSE in
the ibm,arch-vec-5-platform-support DT property as the current code does.
The first reason is that it doesn't make sense, and the second one is that
causes the CAS-negotiated options subsection to be migrated. This breaks
backward migration to QEMU 2.7 and older versions on POWER8 hosts:
qemu-system-ppc64: error while loading state for instance 0x0 of device
'spapr'
qemu-system-ppc64: load of migration failed: No such file or directory
This patch hence initialize CPUs a bit earlier so that we can check the
requested compat mode, and don't set OV5_MMU_RADIX_GTSE for power8 and
older.
Signed-off-by: Greg Kurz <groug@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Diffstat (limited to 'hw/ppc')
| -rw-r--r-- | hw/ppc/spapr.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c index 19997f66c0..32ab3c43b6 100644 --- a/hw/ppc/spapr.c +++ b/hw/ppc/spapr.c @@ -2512,6 +2512,7 @@ static void spapr_machine_init(MachineState *machine) long load_limit, fw_size; char *filename; Error *resize_hpt_err = NULL; + PowerPCCPU *first_ppc_cpu; msi_nonbroken = true; @@ -2592,11 +2593,6 @@ static void spapr_machine_init(MachineState *machine) } spapr_ovec_set(spapr->ov5, OV5_FORM1_AFFINITY); - if (!kvm_enabled() || kvmppc_has_cap_mmu_radix()) { - /* KVM and TCG always allow GTSE with radix... */ - spapr_ovec_set(spapr->ov5, OV5_MMU_RADIX_GTSE); - } - /* ... but not with hash (currently). */ /* advertise support for dedicated HP event source to guests */ if (spapr->use_hotplug_event_source) { @@ -2614,6 +2610,15 @@ static void spapr_machine_init(MachineState *machine) /* init CPUs */ spapr_init_cpus(spapr); + first_ppc_cpu = POWERPC_CPU(first_cpu); + if ((!kvm_enabled() || kvmppc_has_cap_mmu_radix()) && + ppc_check_compat(first_ppc_cpu, CPU_POWERPC_LOGICAL_3_00, 0, + spapr->max_compat_pvr)) { + /* KVM and TCG always allow GTSE with radix... */ + spapr_ovec_set(spapr->ov5, OV5_MMU_RADIX_GTSE); + } + /* ... but not with hash (currently). */ + if (kvm_enabled()) { /* Enable H_LOGICAL_CI_* so SLOF can talk to in-kernel devices */ kvmppc_enable_logical_ci_hcalls(); |