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PPC: e500: advertise 4.2 MPIC only if KVM supports EPR 

Older KVM versions don't support EPR which breaks guests when we announce
MPIC variants that support EPR.

Catch that case and expose only MPIC version 2.0 which tells the guest that
we don't support the EPR capability yet.

Signed-off-by: Stuart Yoder <stuart.yoder@freescale.com>
[agraf: Add comment, route cap check through kvm_ppc.c]
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Stuart Yoder 2013-03-30 06:40:49 +00:00 committed by Alexander Graf
parent e71ec2e93d
commit 3b961124bf
3 changed files with 20 additions and 0 deletions
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7
hw/ppc/e500plat.c
View File

@ -16,6 +16,7 @@
#include "sysemu/device_tree.h"
#include "hw/pci/pci.h"
#include "hw/ppc/openpic.h"
#include "kvm_ppc.h"
static void e500plat_fixup_devtree(PPCE500Params *params, void *fdt)
{
@ -48,6 +49,12 @@ static void e500plat_init(QEMUMachineInitArgs *args)
.mpic_version = OPENPIC_MODEL_FSL_MPIC_42,
};
/* Older KVM versions don't support EPR which breaks guests when we announce
MPIC variants that support EPR. Revert to an older one for those */
if (kvm_enabled() && !kvmppc_has_cap_epr()) {
params.mpic_version = OPENPIC_MODEL_FSL_MPIC_20;
}
ppce500_init(&params);
}

7
target-ppc/kvm.c
View File

@ -63,6 +63,7 @@ static int cap_ppc_rma;
static int cap_spapr_tce;
static int cap_hior;
static int cap_one_reg;
static int cap_epr;
/* XXX We have a race condition where we actually have a level triggered
* interrupt, but the infrastructure can't expose that yet, so the guest
@ -95,6 +96,7 @@ int kvm_arch_init(KVMState *s)
cap_spapr_tce = kvm_check_extension(s, KVM_CAP_SPAPR_TCE);
cap_one_reg = kvm_check_extension(s, KVM_CAP_ONE_REG);
cap_hior = kvm_check_extension(s, KVM_CAP_PPC_HIOR);
cap_epr = kvm_check_extension(s, KVM_CAP_PPC_EPR);
if (!cap_interrupt_level) {
fprintf(stderr, "KVM: Couldn't find level irq capability. Expect the "
@ -1530,6 +1532,11 @@ int kvmppc_fixup_cpu(PowerPCCPU *cpu)
return 0;
}
bool kvmppc_has_cap_epr(void)
{
return cap_epr;
}
static int kvm_ppc_register_host_cpu_type(void)
{
TypeInfo type_info = {

6
target-ppc/kvm_ppc.h
View File

@ -33,6 +33,7 @@ int kvmppc_reset_htab(int shift_hint);
uint64_t kvmppc_rma_size(uint64_t current_size, unsigned int hash_shift);
#endif /* !CONFIG_USER_ONLY */
int kvmppc_fixup_cpu(PowerPCCPU *cpu);
bool kvmppc_has_cap_epr(void);
#else
@ -129,6 +130,11 @@ static inline int kvmppc_fixup_cpu(PowerPCCPU *cpu)
{
return -1;
}
static inline bool kvmppc_has_cap_epr(void)
{
return false;
}
#endif
#ifndef CONFIG_KVM