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KVM: PPC: Book3S HV: Set process table for HPT guests on POWER9 

This adds the implementation of the KVM_PPC_CONFIGURE_V3_MMU ioctl
for HPT guests on POWER9.  With this, we can return 1 for the
KVM_CAP_PPC_MMU_HASH_V3 capability.

Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Paul Mackerras 2017-01-30 21:21:42 +11:00 committed by Michael Ellerman
parent c927013227
commit 468808bd35
3 changed files with 33 additions and 5 deletions
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1
arch/powerpc/include/asm/kvm_host.h
View File

@ -264,6 +264,7 @@ struct kvm_arch {
atomic_t hpte_mod_interest;
cpumask_t need_tlb_flush;
int hpt_cma_alloc;
u64 process_table;
struct dentry *debugfs_dir;
struct dentry *htab_dentry;
#endif /* CONFIG_KVM_BOOK3S_HV_POSSIBLE */

35
arch/powerpc/kvm/book3s_hv.c
View File

@ -3091,8 +3091,8 @@ static void kvmppc_setup_partition_table(struct kvm *kvm)
/* HTABSIZE and HTABORG fields */
dw0 |= kvm->arch.sdr1;
/* Second dword has GR=0; other fields are unused since UPRT=0 */
dw1 = 0;
/* Second dword as set by userspace */
dw1 = kvm->arch.process_table;
mmu_partition_table_set_entry(kvm->arch.lpid, dw0, dw1);
}
@ -3657,10 +3657,37 @@ static void init_default_hcalls(void)
}
}
/* dummy implementations for now */
static int kvmhv_configure_mmu(struct kvm *kvm, struct kvm_ppc_mmuv3_cfg *cfg)
{
return -EINVAL;
unsigned long lpcr;
/* If not on a POWER9, reject it */
if (!cpu_has_feature(CPU_FTR_ARCH_300))
return -ENODEV;
/* If any unknown flags set, reject it */
if (cfg->flags & ~(KVM_PPC_MMUV3_RADIX | KVM_PPC_MMUV3_GTSE))
return -EINVAL;
/* We can't do radix yet */
if (cfg->flags & KVM_PPC_MMUV3_RADIX)
return -EINVAL;
/* GR (guest radix) bit in process_table field must match */
if (cfg->process_table & PATB_GR)
return -EINVAL;
/* Process table size field must be reasonable, i.e. <= 24 */
if ((cfg->process_table & PRTS_MASK) > 24)
return -EINVAL;
kvm->arch.process_table = cfg->process_table;
kvmppc_setup_partition_table(kvm);
lpcr = (cfg->flags & KVM_PPC_MMUV3_GTSE) ? LPCR_GTSE : 0;
kvmppc_update_lpcr(kvm, lpcr, LPCR_GTSE);
return 0;
}
static int kvmhv_get_rmmu_info(struct kvm *kvm, struct kvm_ppc_rmmu_info *info)

2
arch/powerpc/kvm/powerpc.c
View File

@ -569,7 +569,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
r = !!(0 && hv_enabled && radix_enabled());
break;
case KVM_CAP_PPC_MMU_HASH_V3:
r = !!(0 && hv_enabled && !radix_enabled() &&
r = !!(hv_enabled && !radix_enabled() &&
cpu_has_feature(CPU_FTR_ARCH_300));
break;
#endif