diff options
Diffstat (limited to 'target/i386/helper.c')
| -rw-r--r-- | target/i386/helper.c | 54 |
1 files changed, 45 insertions, 9 deletions
diff --git a/target/i386/helper.c b/target/i386/helper.c index 4ecc0912a4..43e87ddba0 100644 --- a/target/i386/helper.c +++ b/target/i386/helper.c @@ -651,11 +651,11 @@ void cpu_x86_update_cr4(CPUX86State *env, uint32_t new_cr4) uint32_t hflags; #if defined(DEBUG_MMU) - printf("CR4 update: CR4=%08x\n", (uint32_t)env->cr[4]); + printf("CR4 update: %08x -> %08x\n", (uint32_t)env->cr[4], new_cr4); #endif if ((new_cr4 ^ env->cr[4]) & (CR4_PGE_MASK | CR4_PAE_MASK | CR4_PSE_MASK | - CR4_SMEP_MASK | CR4_SMAP_MASK)) { + CR4_SMEP_MASK | CR4_SMAP_MASK | CR4_LA57_MASK)) { tlb_flush(CPU(cpu), 1); } @@ -757,19 +757,41 @@ int x86_cpu_handle_mmu_fault(CPUState *cs, vaddr addr, #ifdef TARGET_X86_64 if (env->hflags & HF_LMA_MASK) { + bool la57 = env->cr[4] & CR4_LA57_MASK; + uint64_t pml5e_addr, pml5e; uint64_t pml4e_addr, pml4e; int32_t sext; /* test virtual address sign extension */ - sext = (int64_t)addr >> 47; + sext = la57 ? (int64_t)addr >> 56 : (int64_t)addr >> 47; if (sext != 0 && sext != -1) { env->error_code = 0; cs->exception_index = EXCP0D_GPF; return 1; } - pml4e_addr = ((env->cr[3] & ~0xfff) + (((addr >> 39) & 0x1ff) << 3)) & - env->a20_mask; + if (la57) { + pml5e_addr = ((env->cr[3] & ~0xfff) + + (((addr >> 48) & 0x1ff) << 3)) & env->a20_mask; + pml5e = x86_ldq_phys(cs, pml5e_addr); + if (!(pml5e & PG_PRESENT_MASK)) { + goto do_fault; + } + if (pml5e & (rsvd_mask | PG_PSE_MASK)) { + goto do_fault_rsvd; + } + if (!(pml5e & PG_ACCESSED_MASK)) { + pml5e |= PG_ACCESSED_MASK; + x86_stl_phys_notdirty(cs, pml5e_addr, pml5e); + } + ptep = pml5e ^ PG_NX_MASK; + } else { + pml5e = env->cr[3]; + ptep = PG_NX_MASK | PG_USER_MASK | PG_RW_MASK; + } + + pml4e_addr = ((pml5e & PG_ADDRESS_MASK) + + (((addr >> 39) & 0x1ff) << 3)) & env->a20_mask; pml4e = x86_ldq_phys(cs, pml4e_addr); if (!(pml4e & PG_PRESENT_MASK)) { goto do_fault; @@ -781,7 +803,7 @@ int x86_cpu_handle_mmu_fault(CPUState *cs, vaddr addr, pml4e |= PG_ACCESSED_MASK; x86_stl_phys_notdirty(cs, pml4e_addr, pml4e); } - ptep = pml4e ^ PG_NX_MASK; + ptep &= pml4e ^ PG_NX_MASK; pdpe_addr = ((pml4e & PG_ADDRESS_MASK) + (((addr >> 30) & 0x1ff) << 3)) & env->a20_mask; pdpe = x86_ldq_phys(cs, pdpe_addr); @@ -1024,16 +1046,30 @@ hwaddr x86_cpu_get_phys_page_debug(CPUState *cs, vaddr addr) #ifdef TARGET_X86_64 if (env->hflags & HF_LMA_MASK) { + bool la57 = env->cr[4] & CR4_LA57_MASK; + uint64_t pml5e_addr, pml5e; uint64_t pml4e_addr, pml4e; int32_t sext; /* test virtual address sign extension */ - sext = (int64_t)addr >> 47; + sext = la57 ? (int64_t)addr >> 56 : (int64_t)addr >> 47; if (sext != 0 && sext != -1) { return -1; } - pml4e_addr = ((env->cr[3] & ~0xfff) + (((addr >> 39) & 0x1ff) << 3)) & - env->a20_mask; + + if (la57) { + pml5e_addr = ((env->cr[3] & ~0xfff) + + (((addr >> 48) & 0x1ff) << 3)) & env->a20_mask; + pml5e = x86_ldq_phys(cs, pml5e_addr); + if (!(pml5e & PG_PRESENT_MASK)) { + return -1; + } + } else { + pml5e = env->cr[3]; + } + + pml4e_addr = ((pml5e & PG_ADDRESS_MASK) + + (((addr >> 39) & 0x1ff) << 3)) & env->a20_mask; pml4e = x86_ldq_phys(cs, pml4e_addr); if (!(pml4e & PG_PRESENT_MASK)) { return -1; |