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KVM: PPC: Book3S_32: PR: Access HTAB in big endian 

The HTAB is always big endian. We access the guest's HTAB using
copy_from/to_user, but don't yet take care of the fact that we might
be running on an LE host.

Wrap all accesses to the guest HTAB with big endian accessors.

Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Alexander Graf 2014-04-24 12:51:44 +02:00
parent 740f834eb2
commit 860540bc50
1 changed files with 10 additions and 6 deletions
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16
arch/powerpc/kvm/book3s_32_mmu.c
View File

@ -208,6 +208,7 @@ static int kvmppc_mmu_book3s_32_xlate_pte(struct kvm_vcpu *vcpu, gva_t eaddr,
u32 sre;
hva_t ptegp;
u32 pteg[16];
u32 pte0, pte1;
u32 ptem = 0;
int i;
int found = 0;
@ -233,11 +234,13 @@ static int kvmppc_mmu_book3s_32_xlate_pte(struct kvm_vcpu *vcpu, gva_t eaddr,
}
for (i=0; i<16; i+=2) {
if (ptem == pteg[i]) {
pte0 = be32_to_cpu(pteg[i]);
pte1 = be32_to_cpu(pteg[i + 1]);
if (ptem == pte0) {
u8 pp;
pte->raddr = (pteg[i+1] & ~(0xFFFULL)) | (eaddr & 0xFFF);
pp = pteg[i+1] & 3;
pte->raddr = (pte1 & ~(0xFFFULL)) | (eaddr & 0xFFF);
pp = pte1 & 3;
if ((sr_kp(sre) && (vcpu->arch.shared->msr & MSR_PR)) ||
(sr_ks(sre) && !(vcpu->arch.shared->msr & MSR_PR)))
@ -260,7 +263,7 @@ static int kvmppc_mmu_book3s_32_xlate_pte(struct kvm_vcpu *vcpu, gva_t eaddr,
}
dprintk_pte("MMU: Found PTE -> %x %x - %x\n",
pteg[i], pteg[i+1], pp);
pte0, pte1, pp);
found = 1;
break;
}
@ -269,7 +272,7 @@ static int kvmppc_mmu_book3s_32_xlate_pte(struct kvm_vcpu *vcpu, gva_t eaddr,
/* Update PTE C and A bits, so the guest's swapper knows we used the
page */
if (found) {
u32 pte_r = pteg[i+1];
u32 pte_r = pte1;
char __user *addr = (char __user *) (ptegp + (i+1) * sizeof(u32));
/*
@ -296,7 +299,8 @@ no_page_found:
to_book3s(vcpu)->sdr1, ptegp);
for (i=0; i<16; i+=2) {
dprintk_pte(" %02d: 0x%x - 0x%x (0x%x)\n",
i, pteg[i], pteg[i+1], ptem);
i, be32_to_cpu(pteg[i]),
be32_to_cpu(pteg[i+1]), ptem);
}
}