Merge branch 'next' (accumulated 3.16 merge window patches) into master

Now that 3.15 is released, this merges the 'next' branch into 'master',
bringing us to the normal situation where my 'master' branch is the
merge window.

* accumulated work in next: (6809 commits)
  ufs: sb mutex merge + mutex_destroy
  powerpc: update comments for generic idle conversion
  cris: update comments for generic idle conversion
  idle: remove cpu_idle() forward declarations
  nbd: zero from and len fields in NBD_CMD_DISCONNECT.
  mm: convert some level-less printks to pr_*
  MAINTAINERS: adi-buildroot-devel is moderated
  MAINTAINERS: add linux-api for review of API/ABI changes
  mm/kmemleak-test.c: use pr_fmt for logging
  fs/dlm/debug_fs.c: replace seq_printf by seq_puts
  fs/dlm/lockspace.c: convert simple_str to kstr
  fs/dlm/config.c: convert simple_str to kstr
  mm: mark remap_file_pages() syscall as deprecated
  mm: memcontrol: remove unnecessary memcg argument from soft limit functions
  mm: memcontrol: clean up memcg zoneinfo lookup
  mm/memblock.c: call kmemleak directly from memblock_(alloc|free)
  mm/mempool.c: update the kmemleak stack trace for mempool allocations
  lib/radix-tree.c: update the kmemleak stack trace for radix tree allocations
  mm: introduce kmemleak_update_trace()
  mm/kmemleak.c: use %u to print ->checksum
  ...

1 files changed, 104 insertions, 52 deletions

diff --git a/arch/powerpc/kvm/book3s_emulate.c b/arch/powerpc/kvm/book3s_emulate.c
index 99d40f8977e8..3f295269af37 100644
--- a/arch/powerpc/kvm/book3s_emulate.c
+++ b/arch/powerpc/kvm/book3s_emulate.c
@@ -80,7 +80,7 @@ static bool spr_allowed(struct kvm_vcpu *vcpu, enum priv_level level)
 		return false;
 
 	/* Limit user space to its own small SPR set */
-	if ((vcpu->arch.shared->msr & MSR_PR) && level > PRIV_PROBLEM)
+	if ((kvmppc_get_msr(vcpu) & MSR_PR) && level > PRIV_PROBLEM)
 		return false;
 
 	return true;
@@ -94,14 +94,31 @@ int kvmppc_core_emulate_op_pr(struct kvm_run *run, struct kvm_vcpu *vcpu,
 	int rs = get_rs(inst);
 	int ra = get_ra(inst);
 	int rb = get_rb(inst);
+	u32 inst_sc = 0x44000002;
 
 	switch (get_op(inst)) {
+	case 0:
+		emulated = EMULATE_FAIL;
+		if ((kvmppc_get_msr(vcpu) & MSR_LE) &&
+		    (inst == swab32(inst_sc))) {
+			/*
+			 * This is the byte reversed syscall instruction of our
+			 * hypercall handler. Early versions of LE Linux didn't
+			 * swap the instructions correctly and ended up in
+			 * illegal instructions.
+			 * Just always fail hypercalls on these broken systems.
+			 */
+			kvmppc_set_gpr(vcpu, 3, EV_UNIMPLEMENTED);
+			kvmppc_set_pc(vcpu, kvmppc_get_pc(vcpu) + 4);
+			emulated = EMULATE_DONE;
+		}
+		break;
 	case 19:
 		switch (get_xop(inst)) {
 		case OP_19_XOP_RFID:
 		case OP_19_XOP_RFI:
-			kvmppc_set_pc(vcpu, vcpu->arch.shared->srr0);
-			kvmppc_set_msr(vcpu, vcpu->arch.shared->srr1);
+			kvmppc_set_pc(vcpu, kvmppc_get_srr0(vcpu));
+			kvmppc_set_msr(vcpu, kvmppc_get_srr1(vcpu));
 			*advance = 0;
 			break;
 
@@ -113,16 +130,16 @@ int kvmppc_core_emulate_op_pr(struct kvm_run *run, struct kvm_vcpu *vcpu,
 	case 31:
 		switch (get_xop(inst)) {
 		case OP_31_XOP_MFMSR:
-			kvmppc_set_gpr(vcpu, rt, vcpu->arch.shared->msr);
+			kvmppc_set_gpr(vcpu, rt, kvmppc_get_msr(vcpu));
 			break;
 		case OP_31_XOP_MTMSRD:
 		{
 			ulong rs_val = kvmppc_get_gpr(vcpu, rs);
 			if (inst & 0x10000) {
-				ulong new_msr = vcpu->arch.shared->msr;
+				ulong new_msr = kvmppc_get_msr(vcpu);
 				new_msr &= ~(MSR_RI | MSR_EE);
 				new_msr |= rs_val & (MSR_RI | MSR_EE);
-				vcpu->arch.shared->msr = new_msr;
+				kvmppc_set_msr_fast(vcpu, new_msr);
 			} else
 				kvmppc_set_msr(vcpu, rs_val);
 			break;
@@ -179,7 +196,7 @@ int kvmppc_core_emulate_op_pr(struct kvm_run *run, struct kvm_vcpu *vcpu,
 			ulong cmd = kvmppc_get_gpr(vcpu, 3);
 			int i;
 
-		        if ((vcpu->arch.shared->msr & MSR_PR) ||
+		        if ((kvmppc_get_msr(vcpu) & MSR_PR) ||
 			    !vcpu->arch.papr_enabled) {
 				emulated = EMULATE_FAIL;
 				break;
@@ -261,14 +278,14 @@ int kvmppc_core_emulate_op_pr(struct kvm_run *run, struct kvm_vcpu *vcpu,
 				ra_val = kvmppc_get_gpr(vcpu, ra);
 
 			addr = (ra_val + rb_val) & ~31ULL;
-			if (!(vcpu->arch.shared->msr & MSR_SF))
+			if (!(kvmppc_get_msr(vcpu) & MSR_SF))
 				addr &= 0xffffffff;
 			vaddr = addr;
 
 			r = kvmppc_st(vcpu, &addr, 32, zeros, true);
 			if ((r == -ENOENT) || (r == -EPERM)) {
 				*advance = 0;
-				vcpu->arch.shared->dar = vaddr;
+				kvmppc_set_dar(vcpu, vaddr);
 				vcpu->arch.fault_dar = vaddr;
 
 				dsisr = DSISR_ISSTORE;
@@ -277,7 +294,7 @@ int kvmppc_core_emulate_op_pr(struct kvm_run *run, struct kvm_vcpu *vcpu,
 				else if (r == -EPERM)
 					dsisr |= DSISR_PROTFAULT;
 
-				vcpu->arch.shared->dsisr = dsisr;
+				kvmppc_set_dsisr(vcpu, dsisr);
 				vcpu->arch.fault_dsisr = dsisr;
 
 				kvmppc_book3s_queue_irqprio(vcpu,
@@ -356,10 +373,10 @@ int kvmppc_core_emulate_mtspr_pr(struct kvm_vcpu *vcpu, int sprn, ulong spr_val)
 		to_book3s(vcpu)->sdr1 = spr_val;
 		break;
 	case SPRN_DSISR:
-		vcpu->arch.shared->dsisr = spr_val;
+		kvmppc_set_dsisr(vcpu, spr_val);
 		break;
 	case SPRN_DAR:
-		vcpu->arch.shared->dar = spr_val;
+		kvmppc_set_dar(vcpu, spr_val);
 		break;
 	case SPRN_HIOR:
 		to_book3s(vcpu)->hior = spr_val;
@@ -438,6 +455,31 @@ int kvmppc_core_emulate_mtspr_pr(struct kvm_vcpu *vcpu, int sprn, ulong spr_val)
 	case SPRN_GQR7:
 		to_book3s(vcpu)->gqr[sprn - SPRN_GQR0] = spr_val;
 		break;
+	case SPRN_FSCR:
+		vcpu->arch.fscr = spr_val;
+		break;
+#ifdef CONFIG_PPC_BOOK3S_64
+	case SPRN_BESCR:
+		vcpu->arch.bescr = spr_val;
+		break;
+	case SPRN_EBBHR:
+		vcpu->arch.ebbhr = spr_val;
+		break;
+	case SPRN_EBBRR:
+		vcpu->arch.ebbrr = spr_val;
+		break;
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+	case SPRN_TFHAR:
+		vcpu->arch.tfhar = spr_val;
+		break;
+	case SPRN_TEXASR:
+		vcpu->arch.texasr = spr_val;
+		break;
+	case SPRN_TFIAR:
+		vcpu->arch.tfiar = spr_val;
+		break;
+#endif
+#endif
 	case SPRN_ICTC:
 	case SPRN_THRM1:
 	case SPRN_THRM2:
@@ -455,6 +497,13 @@ int kvmppc_core_emulate_mtspr_pr(struct kvm_vcpu *vcpu, int sprn, ulong spr_val)
 	case SPRN_WPAR_GEKKO:
 	case SPRN_MSSSR0:
 	case SPRN_DABR:
+#ifdef CONFIG_PPC_BOOK3S_64
+	case SPRN_MMCRS:
+	case SPRN_MMCRA:
+	case SPRN_MMCR0:
+	case SPRN_MMCR1:
+	case SPRN_MMCR2:
+#endif
 		break;
 unprivileged:
 	default:
@@ -493,10 +542,10 @@ int kvmppc_core_emulate_mfspr_pr(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val
 		*spr_val = to_book3s(vcpu)->sdr1;
 		break;
 	case SPRN_DSISR:
-		*spr_val = vcpu->arch.shared->dsisr;
+		*spr_val = kvmppc_get_dsisr(vcpu);
 		break;
 	case SPRN_DAR:
-		*spr_val = vcpu->arch.shared->dar;
+		*spr_val = kvmppc_get_dar(vcpu);
 		break;
 	case SPRN_HIOR:
 		*spr_val = to_book3s(vcpu)->hior;
@@ -538,6 +587,31 @@ int kvmppc_core_emulate_mfspr_pr(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val
 	case SPRN_GQR7:
 		*spr_val = to_book3s(vcpu)->gqr[sprn - SPRN_GQR0];
 		break;
+	case SPRN_FSCR:
+		*spr_val = vcpu->arch.fscr;
+		break;
+#ifdef CONFIG_PPC_BOOK3S_64
+	case SPRN_BESCR:
+		*spr_val = vcpu->arch.bescr;
+		break;
+	case SPRN_EBBHR:
+		*spr_val = vcpu->arch.ebbhr;
+		break;
+	case SPRN_EBBRR:
+		*spr_val = vcpu->arch.ebbrr;
+		break;
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+	case SPRN_TFHAR:
+		*spr_val = vcpu->arch.tfhar;
+		break;
+	case SPRN_TEXASR:
+		*spr_val = vcpu->arch.texasr;
+		break;
+	case SPRN_TFIAR:
+		*spr_val = vcpu->arch.tfiar;
+		break;
+#endif
+#endif
 	case SPRN_THRM1:
 	case SPRN_THRM2:
 	case SPRN_THRM3:
@@ -553,6 +627,14 @@ int kvmppc_core_emulate_mfspr_pr(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val
 	case SPRN_WPAR_GEKKO:
 	case SPRN_MSSSR0:
 	case SPRN_DABR:
+#ifdef CONFIG_PPC_BOOK3S_64
+	case SPRN_MMCRS:
+	case SPRN_MMCRA:
+	case SPRN_MMCR0:
+	case SPRN_MMCR1:
+	case SPRN_MMCR2:
+	case SPRN_TIR:
+#endif
 		*spr_val = 0;
 		break;
 	default:
@@ -569,48 +651,17 @@ unprivileged:
 
 u32 kvmppc_alignment_dsisr(struct kvm_vcpu *vcpu, unsigned int inst)
 {
-	u32 dsisr = 0;
-
-	/*
-	 * This is what the spec says about DSISR bits (not mentioned = 0):
-	 *
-	 * 12:13		[DS]	Set to bits 30:31
-	 * 15:16		[X]	Set to bits 29:30
-	 * 17			[X]	Set to bit 25
-	 *			[D/DS]	Set to bit 5
-	 * 18:21		[X]	Set to bits 21:24
-	 *			[D/DS]	Set to bits 1:4
-	 * 22:26			Set to bits 6:10 (RT/RS/FRT/FRS)
-	 * 27:31			Set to bits 11:15 (RA)
-	 */
-
-	switch (get_op(inst)) {
-	/* D-form */
-	case OP_LFS:
-	case OP_LFD:
-	case OP_STFD:
-	case OP_STFS:
-		dsisr |= (inst >> 12) & 0x4000;	/* bit 17 */
-		dsisr |= (inst >> 17) & 0x3c00; /* bits 18:21 */
-		break;
-	/* X-form */
-	case 31:
-		dsisr |= (inst << 14) & 0x18000; /* bits 15:16 */
-		dsisr |= (inst << 8)  & 0x04000; /* bit 17 */
-		dsisr |= (inst << 3)  & 0x03c00; /* bits 18:21 */
-		break;
-	default:
-		printk(KERN_INFO "KVM: Unaligned instruction 0x%x\n", inst);
-		break;
-	}
-
-	dsisr |= (inst >> 16) & 0x03ff; /* bits 22:31 */
-
-	return dsisr;
+	return make_dsisr(inst);
 }
 
 ulong kvmppc_alignment_dar(struct kvm_vcpu *vcpu, unsigned int inst)
 {
+#ifdef CONFIG_PPC_BOOK3S_64
+	/*
+	 * Linux's fix_alignment() assumes that DAR is valid, so can we
+	 */
+	return vcpu->arch.fault_dar;
+#else
 	ulong dar = 0;
 	ulong ra = get_ra(inst);
 	ulong rb = get_rb(inst);
@@ -635,4 +686,5 @@ ulong kvmppc_alignment_dar(struct kvm_vcpu *vcpu, unsigned int inst)
 	}
 
 	return dar;
+#endif
 }