static int pte64_check(struct mmu_ctx_hash64 *ctx, target_ulong pte0, target_ulong pte1, int h, int rwx) { target_ulong mmask; int access, ret, pp; ret = -1; /* Check validity and table match */ if ((pte0 & HPTE64_V_VALID) && (h == !!(pte0 & HPTE64_V_SECONDARY))) { bool nx; /* Check vsid & api */ mmask = PTE64_CHECK_MASK; pp = (pte1 & HPTE64_R_PP) | ((pte1 & HPTE64_R_PP0) >> 61); /* No execute if either noexec or guarded bits set */ nx = (pte1 & HPTE64_R_N) || (pte1 & HPTE64_R_G); if (HPTE64_V_COMPARE(pte0, ctx->ptem)) { if (ctx->raddr != (hwaddr)-1ULL) { /* all matches should have equal RPN, WIMG & PP */ if ((ctx->raddr & mmask) != (pte1 & mmask)) { qemu_log("Bad RPN/WIMG/PP\n"); return -3; } } /* Compute access rights */ access = ppc_hash64_pp_check(ctx->key, pp, nx); /* Keep the matching PTE informations */ ctx->raddr = pte1; ctx->prot = access; ret = ppc_hash64_check_prot(ctx->prot, rwx); if (ret == 0) { /* Access granted */ LOG_MMU("PTE access granted !\n"); } else { /* Access right violation */ LOG_MMU("PTE access rejected\n"); } } } return ret; }