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KVM: PPC: Add load_from_eaddr and store_to_eaddr to the kvmppc_ops struct

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The kvmppc_ops struct is used to store function pointers to kvm
implementation specific functions.

Introduce two new functions load_from_eaddr and store_to_eaddr to be
used to load from and store to a guest effective address respectively.

Also implement these for the kvm-hv module. If we are using the radix
mmu then we can call the functions to access quadrant 1 and 2.

Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
This commit is contained in:
Suraj Jitindar Singh 2018-12-14 16:29:06 +11:00 committed by Paul Mackerras
parent d7b4561522
commit dceadcf91b
2 changed files with 44 additions and 0 deletions
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4
arch/powerpc/include/asm/kvm_ppc.h
View file

@ -328,6 +328,10 @@ struct kvmppc_ops {
unsigned long flags);
void (*giveup_ext)(struct kvm_vcpu *vcpu, ulong msr);
int (*enable_nested)(struct kvm *kvm);
int (*load_from_eaddr)(struct kvm_vcpu *vcpu, ulong *eaddr, void *ptr,
int size);
int (*store_to_eaddr)(struct kvm_vcpu *vcpu, ulong *eaddr, void *ptr,
int size);
};
extern struct kvmppc_ops *kvmppc_hv_ops;

40
arch/powerpc/kvm/book3s_hv.c
View file

@ -5237,6 +5237,44 @@ static int kvmhv_enable_nested(struct kvm *kvm)
return 0;
}
static int kvmhv_load_from_eaddr(struct kvm_vcpu *vcpu, ulong *eaddr, void *ptr,
int size)
{
int rc = -EINVAL;
if (kvmhv_vcpu_is_radix(vcpu)) {
rc = kvmhv_copy_from_guest_radix(vcpu, *eaddr, ptr, size);
if (rc > 0)
rc = -EINVAL;
}
/* For now quadrants are the only way to access nested guest memory */
if (rc && vcpu->arch.nested)
rc = -EAGAIN;
return rc;
}
static int kvmhv_store_to_eaddr(struct kvm_vcpu *vcpu, ulong *eaddr, void *ptr,
int size)
{
int rc = -EINVAL;
if (kvmhv_vcpu_is_radix(vcpu)) {
rc = kvmhv_copy_to_guest_radix(vcpu, *eaddr, ptr, size);
if (rc > 0)
rc = -EINVAL;
}
/* For now quadrants are the only way to access nested guest memory */
if (rc && vcpu->arch.nested)
rc = -EAGAIN;
return rc;
}
static struct kvmppc_ops kvm_ops_hv = {
.get_sregs = kvm_arch_vcpu_ioctl_get_sregs_hv,
.set_sregs = kvm_arch_vcpu_ioctl_set_sregs_hv,
@ -5277,6 +5315,8 @@ static struct kvmppc_ops kvm_ops_hv = {
.get_rmmu_info = kvmhv_get_rmmu_info,
.set_smt_mode = kvmhv_set_smt_mode,
.enable_nested = kvmhv_enable_nested,
.load_from_eaddr = kvmhv_load_from_eaddr,
.store_to_eaddr = kvmhv_store_to_eaddr,
};
static int kvm_init_subcore_bitmap(void)