diff options
| author | Alexander Graf <agraf@suse.de> | 2014-06-20 13:52:36 +0200 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2014-07-28 16:15:50 +0200 |
| commit | 7d15c06f1abfe4b893c6c2c8a306b02210a6a6db (patch) | |
| tree | 7c29513bfb6b32194ea7ac8c1b7c3e0048aacb12 /arch/powerpc/kvm/booke.c | |
| parent | 63fff5c1e3695ff5c9ad8c198a3b03ca4c0c73a8 (diff) | |
KVM: PPC: Implement kvmppc_xlate for all targets
We have a nice API to find the translated GPAs of a GVA including protection
flags. So far we only use it on Book3S, but there's no reason the same shouldn't
be used on BookE as well.
Implement a kvmppc_xlate() version for BookE and clean it up to make it more
readable in general.
Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'arch/powerpc/kvm/booke.c')
| -rw-r--r-- | arch/powerpc/kvm/booke.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c index 97bcde2dc075..2f697b49073b 100644 --- a/arch/powerpc/kvm/booke.c +++ b/arch/powerpc/kvm/booke.c @@ -1785,6 +1785,57 @@ void kvm_guest_protect_msr(struct kvm_vcpu *vcpu, ulong prot_bitmap, bool set) #endif } +int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr, enum xlate_instdata xlid, + enum xlate_readwrite xlrw, struct kvmppc_pte *pte) +{ + int gtlb_index; + gpa_t gpaddr; + +#ifdef CONFIG_KVM_E500V2 + if (!(vcpu->arch.shared->msr & MSR_PR) && + (eaddr & PAGE_MASK) == vcpu->arch.magic_page_ea) { + pte->eaddr = eaddr; + pte->raddr = (vcpu->arch.magic_page_pa & PAGE_MASK) | + (eaddr & ~PAGE_MASK); + pte->vpage = eaddr >> PAGE_SHIFT; + pte->may_read = true; + pte->may_write = true; + pte->may_execute = true; + + return 0; + } +#endif + + /* Check the guest TLB. */ + switch (xlid) { + case XLATE_INST: + gtlb_index = kvmppc_mmu_itlb_index(vcpu, eaddr); + break; + case XLATE_DATA: + gtlb_index = kvmppc_mmu_dtlb_index(vcpu, eaddr); + break; + default: + BUG(); + } + + /* Do we have a TLB entry at all? */ + if (gtlb_index < 0) + return -ENOENT; + + gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr); + + pte->eaddr = eaddr; + pte->raddr = (gpaddr & PAGE_MASK) | (eaddr & ~PAGE_MASK); + pte->vpage = eaddr >> PAGE_SHIFT; + + /* XXX read permissions from the guest TLB */ + pte->may_read = true; + pte->may_write = true; + pte->may_execute = true; + + return 0; +} + int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, struct kvm_guest_debug *dbg) { |