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Merge branch 'kvm-updates/3.0' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Browse source 
* 'kvm-updates/3.0' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: Initialize kvm before registering the mmu notifier
  KVM: x86: use proper port value when checking io instruction permission
  KVM: add missing void __user * cast to access_ok() call
This commit is contained in:
Linus Torvalds 2011-06-07 19:06:28 -07:00
commit 58a9a36b54
2 changed files with 56 additions and 41 deletions
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82
arch/x86/kvm/emulate.c
View file

@ -47,38 +47,40 @@
#define DstDI (5<<1) /* Destination is in ES:(E)DI */ #define DstDI (5<<1) /* Destination is in ES:(E)DI */
#define DstMem64 (6<<1) /* 64bit memory operand */ #define DstMem64 (6<<1) /* 64bit memory operand */
#define DstImmUByte (7<<1) /* 8-bit unsigned immediate operand */ #define DstImmUByte (7<<1) /* 8-bit unsigned immediate operand */
#define DstMask (7<<1) #define DstDX (8<<1) /* Destination is in DX register */
#define DstMask (0xf<<1)
/* Source operand type. */ /* Source operand type. */
#define SrcNone (0<<4) /* No source operand. */ #define SrcNone (0<<5) /* No source operand. */
#define SrcReg (1<<4) /* Register operand. */ #define SrcReg (1<<5) /* Register operand. */
#define SrcMem (2<<4) /* Memory operand. */ #define SrcMem (2<<5) /* Memory operand. */
#define SrcMem16 (3<<4) /* Memory operand (16-bit). */ #define SrcMem16 (3<<5) /* Memory operand (16-bit). */
#define SrcMem32 (4<<4) /* Memory operand (32-bit). */ #define SrcMem32 (4<<5) /* Memory operand (32-bit). */
#define SrcImm (5<<4) /* Immediate operand. */ #define SrcImm (5<<5) /* Immediate operand. */
#define SrcImmByte (6<<4) /* 8-bit sign-extended immediate operand. */ #define SrcImmByte (6<<5) /* 8-bit sign-extended immediate operand. */
#define SrcOne (7<<4) /* Implied '1' */ #define SrcOne (7<<5) /* Implied '1' */
#define SrcImmUByte (8<<4) /* 8-bit unsigned immediate operand. */ #define SrcImmUByte (8<<5) /* 8-bit unsigned immediate operand. */
#define SrcImmU (9<<4) /* Immediate operand, unsigned */ #define SrcImmU (9<<5) /* Immediate operand, unsigned */
#define SrcSI (0xa<<4) /* Source is in the DS:RSI */ #define SrcSI (0xa<<5) /* Source is in the DS:RSI */
#define SrcImmFAddr (0xb<<4) /* Source is immediate far address */ #define SrcImmFAddr (0xb<<5) /* Source is immediate far address */
#define SrcMemFAddr (0xc<<4) /* Source is far address in memory */ #define SrcMemFAddr (0xc<<5) /* Source is far address in memory */
#define SrcAcc (0xd<<4) /* Source Accumulator */ #define SrcAcc (0xd<<5) /* Source Accumulator */
#define SrcImmU16 (0xe<<4) /* Immediate operand, unsigned, 16 bits */ #define SrcImmU16 (0xe<<5) /* Immediate operand, unsigned, 16 bits */
#define SrcMask (0xf<<4) #define SrcDX (0xf<<5) /* Source is in DX register */
#define SrcMask (0xf<<5)
/* Generic ModRM decode. */ /* Generic ModRM decode. */
#define ModRM (1<<8) #define ModRM (1<<9)
/* Destination is only written; never read. */ /* Destination is only written; never read. */
#define Mov (1<<9) #define Mov (1<<10)
#define BitOp (1<<10) #define BitOp (1<<11)
#define MemAbs (1<<11) /* Memory operand is absolute displacement */ #define MemAbs (1<<12) /* Memory operand is absolute displacement */
#define String (1<<12) /* String instruction (rep capable) */ #define String (1<<13) /* String instruction (rep capable) */
#define Stack (1<<13) /* Stack instruction (push/pop) */ #define Stack (1<<14) /* Stack instruction (push/pop) */
#define GroupMask (7<<14) /* Opcode uses one of the group mechanisms */ #define GroupMask (7<<15) /* Opcode uses one of the group mechanisms */
#define Group (1<<14) /* Bits 3:5 of modrm byte extend opcode */ #define Group (1<<15) /* Bits 3:5 of modrm byte extend opcode */
#define GroupDual (2<<14) /* Alternate decoding of mod == 3 */ #define GroupDual (2<<15) /* Alternate decoding of mod == 3 */
#define Prefix (3<<14) /* Instruction varies with 66/f2/f3 prefix */ #define Prefix (3<<15) /* Instruction varies with 66/f2/f3 prefix */
#define RMExt (4<<14) /* Opcode extension in ModRM r/m if mod == 3 */ #define RMExt (4<<15) /* Opcode extension in ModRM r/m if mod == 3 */
#define Sse (1<<17) /* SSE Vector instruction */ #define Sse (1<<18) /* SSE Vector instruction */
/* Misc flags */ /* Misc flags */
#define Prot (1<<21) /* instruction generates #UD if not in prot-mode */ #define Prot (1<<21) /* instruction generates #UD if not in prot-mode */
#define VendorSpecific (1<<22) /* Vendor specific instruction */ #define VendorSpecific (1<<22) /* Vendor specific instruction */
@ -3154,8 +3156,8 @@ static struct opcode opcode_table[256] = {
I(DstReg | SrcMem | ModRM | Src2Imm, em_imul_3op), I(DstReg | SrcMem | ModRM | Src2Imm, em_imul_3op),
I(SrcImmByte | Mov | Stack, em_push), I(SrcImmByte | Mov | Stack, em_push),
I(DstReg | SrcMem | ModRM | Src2ImmByte, em_imul_3op), I(DstReg | SrcMem | ModRM | Src2ImmByte, em_imul_3op),
D2bvIP(DstDI | Mov | String, ins, check_perm_in), /* insb, insw/insd */ D2bvIP(DstDI | SrcDX | Mov | String, ins, check_perm_in), /* insb, insw/insd */
D2bvIP(SrcSI | ImplicitOps | String, outs, check_perm_out), /* outsb, outsw/outsd */ D2bvIP(SrcSI | DstDX | String, outs, check_perm_out), /* outsb, outsw/outsd */
/* 0x70 - 0x7F */ /* 0x70 - 0x7F */
X16(D(SrcImmByte)), X16(D(SrcImmByte)),
/* 0x80 - 0x87 */ /* 0x80 - 0x87 */
@ -3212,8 +3214,8 @@ static struct opcode opcode_table[256] = {
/* 0xE8 - 0xEF */ /* 0xE8 - 0xEF */
D(SrcImm | Stack), D(SrcImm | ImplicitOps), D(SrcImm | Stack), D(SrcImm | ImplicitOps),
D(SrcImmFAddr | No64), D(SrcImmByte | ImplicitOps), D(SrcImmFAddr | No64), D(SrcImmByte | ImplicitOps),
D2bvIP(SrcNone | DstAcc, in, check_perm_in), D2bvIP(SrcDX | DstAcc, in, check_perm_in),
D2bvIP(SrcAcc | ImplicitOps, out, check_perm_out), D2bvIP(SrcAcc | DstDX, out, check_perm_out),
/* 0xF0 - 0xF7 */ /* 0xF0 - 0xF7 */
N, DI(ImplicitOps, icebp), N, N, N, DI(ImplicitOps, icebp), N, N,
DI(ImplicitOps | Priv, hlt), D(ImplicitOps), DI(ImplicitOps | Priv, hlt), D(ImplicitOps),
@ -3613,6 +3615,12 @@ x86_decode_insn(struct x86_emulate_ctxt *ctxt, void *insn, int insn_len)
memop.bytes = c->op_bytes + 2; memop.bytes = c->op_bytes + 2;
goto srcmem_common; goto srcmem_common;
break; break;
case SrcDX:
c->src.type = OP_REG;
c->src.bytes = 2;
c->src.addr.reg = &c->regs[VCPU_REGS_RDX];
fetch_register_operand(&c->src);
break;
} }
if (rc != X86EMUL_CONTINUE) if (rc != X86EMUL_CONTINUE)
@ -3682,6 +3690,12 @@ x86_decode_insn(struct x86_emulate_ctxt *ctxt, void *insn, int insn_len)
c->dst.addr.mem.seg = VCPU_SREG_ES; c->dst.addr.mem.seg = VCPU_SREG_ES;
c->dst.val = 0; c->dst.val = 0;
break; break;
case DstDX:
c->dst.type = OP_REG;
c->dst.bytes = 2;
c->dst.addr.reg = &c->regs[VCPU_REGS_RDX];
fetch_register_operand(&c->dst);
break;
case ImplicitOps: case ImplicitOps:
/* Special instructions do their own operand decoding. */ /* Special instructions do their own operand decoding. */
default: default:
@ -4027,7 +4041,6 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt)
break; break;
case 0xec: /* in al,dx */ case 0xec: /* in al,dx */
case 0xed: /* in (e/r)ax,dx */ case 0xed: /* in (e/r)ax,dx */
c->src.val = c->regs[VCPU_REGS_RDX];
do_io_in: do_io_in:
if (!pio_in_emulated(ctxt, ops, c->dst.bytes, c->src.val, if (!pio_in_emulated(ctxt, ops, c->dst.bytes, c->src.val,
&c->dst.val)) &c->dst.val))
@ -4035,7 +4048,6 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt)
break; break;
case 0xee: /* out dx,al */ case 0xee: /* out dx,al */
case 0xef: /* out dx,(e/r)ax */ case 0xef: /* out dx,(e/r)ax */
c->dst.val = c->regs[VCPU_REGS_RDX];
do_io_out: do_io_out:
ops->pio_out_emulated(ctxt, c->src.bytes, c->dst.val, ops->pio_out_emulated(ctxt, c->src.bytes, c->dst.val,
&c->src.val, 1); &c->src.val, 1);

15
virt/kvm/kvm_main.c
View file

@ -467,12 +467,8 @@ static struct kvm *kvm_create_vm(void)
if (!kvm->buses[i]) if (!kvm->buses[i])
goto out_err; goto out_err;
} }
spin_lock_init(&kvm->mmu_lock); spin_lock_init(&kvm->mmu_lock);
r = kvm_init_mmu_notifier(kvm);
if (r)
goto out_err;
kvm->mm = current->mm; kvm->mm = current->mm;
atomic_inc(&kvm->mm->mm_count); atomic_inc(&kvm->mm->mm_count);
kvm_eventfd_init(kvm); kvm_eventfd_init(kvm);
@ -480,6 +476,11 @@ static struct kvm *kvm_create_vm(void)
mutex_init(&kvm->irq_lock); mutex_init(&kvm->irq_lock);
mutex_init(&kvm->slots_lock); mutex_init(&kvm->slots_lock);
atomic_set(&kvm->users_count, 1); atomic_set(&kvm->users_count, 1);
r = kvm_init_mmu_notifier(kvm);
if (r)
goto out_err;
raw_spin_lock(&kvm_lock); raw_spin_lock(&kvm_lock);
list_add(&kvm->vm_list, &vm_list); list_add(&kvm->vm_list, &vm_list);
raw_spin_unlock(&kvm_lock); raw_spin_unlock(&kvm_lock);
@ -651,7 +652,9 @@ int __kvm_set_memory_region(struct kvm *kvm,
/* We can read the guest memory with __xxx_user() later on. */ /* We can read the guest memory with __xxx_user() later on. */
if (user_alloc && if (user_alloc &&
((mem->userspace_addr & (PAGE_SIZE - 1)) || ((mem->userspace_addr & (PAGE_SIZE - 1)) ||
!access_ok(VERIFY_WRITE, mem->userspace_addr, mem->memory_size))) !access_ok(VERIFY_WRITE,
(void __user *)(unsigned long)mem->userspace_addr,
mem->memory_size)))
goto out; goto out;
if (mem->slot >= KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS) if (mem->slot >= KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS)
goto out; goto out;