Patchwork KVM: PPC: e500: Expose MMU registers via ONE_REG

login
register
mail settings
Submitter Mihai Caraman
Date March 19, 2013, 5:17 p.m.
Message ID <1363713431-27926-1-git-send-email-mihai.caraman@freescale.com>
Download mbox | patch
Permalink /patch/229151/
State Not Applicable
Delegated to: Anatolij Gustschin
Headers show

Comments

Mihai Caraman - March 19, 2013, 5:17 p.m.
MMU registers were exposed to user-space using sregs interface. Add them to
ONE_REG interface.

Signed-off-by: Mihai Caraman <mihai.caraman@freescale.com>
---
 Documentation/virtual/kvm/api.txt   |   13 +++++
 arch/powerpc/include/uapi/asm/kvm.h |   14 ++++++
 arch/powerpc/kvm/44x.c              |   12 +++++
 arch/powerpc/kvm/booke.c            |   67 +++++++++++++++++---------
 arch/powerpc/kvm/e500.c             |   14 ++++++
 arch/powerpc/kvm/e500.h             |    4 ++
 arch/powerpc/kvm/e500_mmu.c         |   89 +++++++++++++++++++++++++++++++++++
 arch/powerpc/kvm/e500mc.c           |   15 ++++++
 8 files changed, 204 insertions(+), 24 deletions(-)

Patch

diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt
index c2534c3..9aee4dd 100644
--- a/Documentation/virtual/kvm/api.txt
+++ b/Documentation/virtual/kvm/api.txt
@@ -1763,6 +1763,19 @@  registers, find a list below:
   PPC   | KVM_REG_PPC_EPCR	| 32
   PPC   | KVM_REG_PPC_EPR	| 32
 
+  PPC   | KVM_REG_PPC_MAS0	| 32
+  PPC   | KVM_REG_PPC_MAS1	| 32
+  PPC   | KVM_REG_PPC_MAS2	| 64
+  PPC   | KVM_REG_PPC_MAS7_3	| 64
+  PPC   | KVM_REG_PPC_MAS4	| 32
+  PPC   | KVM_REG_PPC_MAS6	| 32
+
+  PPC   | KVM_REG_PPC_MMUCFG	| 32
+  PPC   | KVM_REG_PPC_TLB0CFG	| 32
+  PPC   | KVM_REG_PPC_TLB1CFG	| 32
+  PPC   | KVM_REG_PPC_TLB2CFG	| 32
+  PPC   | KVM_REG_PPC_TLB3CFG	| 32
+
 4.69 KVM_GET_ONE_REG
 
 Capability: KVM_CAP_ONE_REG
diff --git a/arch/powerpc/include/uapi/asm/kvm.h b/arch/powerpc/include/uapi/asm/kvm.h
index 16064d0..70dfeef 100644
--- a/arch/powerpc/include/uapi/asm/kvm.h
+++ b/arch/powerpc/include/uapi/asm/kvm.h
@@ -417,4 +417,18 @@  struct kvm_get_htab_header {
 #define KVM_REG_PPC_EPCR	(KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x85)
 #define KVM_REG_PPC_EPR		(KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x86)
 
+/* MMU registers */
+#define KVM_REG_PPC_MAS0	(KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x87)
+#define KVM_REG_PPC_MAS1	(KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x88)
+#define KVM_REG_PPC_MAS2	(KVM_REG_PPC | KVM_REG_SIZE_U64 | 0x89)
+#define KVM_REG_PPC_MAS7_3	(KVM_REG_PPC | KVM_REG_SIZE_U64 | 0x8a)
+#define KVM_REG_PPC_MAS4	(KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x8b)
+#define KVM_REG_PPC_MAS6	(KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x8c)
+#define KVM_REG_PPC_MMUCFG	(KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x8d)
+/* TLBnCFG_N_ENTRY and TLBnCFG_ASSOC can be changed only using SW_TLB ioctl */
+#define KVM_REG_PPC_TLB0CFG	(KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x8e)
+#define KVM_REG_PPC_TLB1CFG	(KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x8f)
+#define KVM_REG_PPC_TLB2CFG	(KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x90)
+#define KVM_REG_PPC_TLB3CFG	(KVM_REG_PPC | KVM_REG_SIZE_U32 | 0x91)
+
 #endif /* __LINUX_KVM_POWERPC_H */
diff --git a/arch/powerpc/kvm/44x.c b/arch/powerpc/kvm/44x.c
index 3d7fd21..2f5c6b6 100644
--- a/arch/powerpc/kvm/44x.c
+++ b/arch/powerpc/kvm/44x.c
@@ -124,6 +124,18 @@  int kvmppc_core_set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
 	return kvmppc_set_sregs_ivor(vcpu, sregs);
 }
 
+int kvmppc_get_one_reg(struct kvm_vcpu *vcpu, u64 id,
+			union kvmppc_one_reg *val)
+{
+	return -EINVAL;
+}
+
+int kvmppc_set_one_reg(struct kvm_vcpu *vcpu, u64 id,
+		       union kvmppc_one_reg *val)
+{
+	return -EINVAL;
+}
+
 struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
 {
 	struct kvmppc_vcpu_44x *vcpu_44x;
diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c
index 020923e..1b25923d 100644
--- a/arch/powerpc/kvm/booke.c
+++ b/arch/powerpc/kvm/booke.c
@@ -1409,81 +1409,100 @@  int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 
 int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
 {
-	int r = -EINVAL;
+	int r = 0;
+	union kvmppc_one_reg val;
+	int size;
+	long int i;
+
+	size = one_reg_size(reg->id);
+	if (size > sizeof(val))
+		return -EINVAL;
 
 	switch (reg->id) {
 	case KVM_REG_PPC_IAC1:
 	case KVM_REG_PPC_IAC2:
 	case KVM_REG_PPC_IAC3:
 	case KVM_REG_PPC_IAC4: {
-		int iac = reg->id - KVM_REG_PPC_IAC1;
-		r = copy_to_user((u64 __user *)(long)reg->addr,
-				 &vcpu->arch.dbg_reg.iac[iac], sizeof(u64));
+		i = reg->id - KVM_REG_PPC_IAC1;
+		val = get_reg_val(reg->id, vcpu->arch.dbg_reg.iac[i]);
 		break;
 	}
 	case KVM_REG_PPC_DAC1:
 	case KVM_REG_PPC_DAC2: {
-		int dac = reg->id - KVM_REG_PPC_DAC1;
-		r = copy_to_user((u64 __user *)(long)reg->addr,
-				 &vcpu->arch.dbg_reg.dac[dac], sizeof(u64));
+		i = reg->id - KVM_REG_PPC_DAC1;
+		val = get_reg_val(reg->id, vcpu->arch.dbg_reg.dac[i]);
 		break;
 	}
 	case KVM_REG_PPC_EPR: {
 		u32 epr = get_guest_epr(vcpu);
-		r = put_user(epr, (u32 __user *)(long)reg->addr);
+		val = get_reg_val(reg->id, epr);
 		break;
 	}
 #if defined(CONFIG_64BIT)
 	case KVM_REG_PPC_EPCR:
-		r = put_user(vcpu->arch.epcr, (u32 __user *)(long)reg->addr);
+		val = get_reg_val(reg->id, vcpu->arch.epcr);
 		break;
 #endif
 	default:
+		r = kvmppc_get_one_reg(vcpu, reg->id, &val);
 		break;
 	}
+
+	if (r)
+		return r;
+
+	if (copy_to_user((char __user *)(unsigned long)reg->addr, &val, size))
+		r = -EFAULT;
+
 	return r;
 }
 
 int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
 {
-	int r = -EINVAL;
+	int r = 0;
+	union kvmppc_one_reg val;
+	int size;
+	long int i;
+
+	size = one_reg_size(reg->id);
+	if (size > sizeof(val))
+		return -EINVAL;
+
+	if (copy_from_user(&val, (char __user *)(unsigned long)reg->addr, size))
+		return -EFAULT;
 
 	switch (reg->id) {
 	case KVM_REG_PPC_IAC1:
 	case KVM_REG_PPC_IAC2:
 	case KVM_REG_PPC_IAC3:
 	case KVM_REG_PPC_IAC4: {
-		int iac = reg->id - KVM_REG_PPC_IAC1;
-		r = copy_from_user(&vcpu->arch.dbg_reg.iac[iac],
-			     (u64 __user *)(long)reg->addr, sizeof(u64));
+		i = reg->id - KVM_REG_PPC_IAC1;
+		vcpu->arch.dbg_reg.iac[i] = set_reg_val(reg->id, val);
 		break;
 	}
 	case KVM_REG_PPC_DAC1:
 	case KVM_REG_PPC_DAC2: {
-		int dac = reg->id - KVM_REG_PPC_DAC1;
-		r = copy_from_user(&vcpu->arch.dbg_reg.dac[dac],
-			     (u64 __user *)(long)reg->addr, sizeof(u64));
+		i = reg->id - KVM_REG_PPC_DAC1;
+		vcpu->arch.dbg_reg.dac[i] = set_reg_val(reg->id, val);
 		break;
 	}
 	case KVM_REG_PPC_EPR: {
-		u32 new_epr;
-		r = get_user(new_epr, (u32 __user *)(long)reg->addr);
-		if (!r)
-			kvmppc_set_epr(vcpu, new_epr);
+		u32 new_epr = set_reg_val(reg->id, val);
+		kvmppc_set_epr(vcpu, new_epr);
 		break;
 	}
 #if defined(CONFIG_64BIT)
 	case KVM_REG_PPC_EPCR: {
-		u32 new_epcr;
-		r = get_user(new_epcr, (u32 __user *)(long)reg->addr);
-		if (r == 0)
-			kvmppc_set_epcr(vcpu, new_epcr);
+		u32 new_epcr = set_reg_val(reg->id, val);
+		kvmppc_set_epcr(vcpu, new_epcr);
 		break;
 	}
 #endif
 	default:
+		r = kvmppc_set_one_reg(vcpu, reg->id, &val);
 		break;
 	}
+
 	return r;
 }
 
diff --git a/arch/powerpc/kvm/e500.c b/arch/powerpc/kvm/e500.c
index 6dd4de7..75875a9 100644
--- a/arch/powerpc/kvm/e500.c
+++ b/arch/powerpc/kvm/e500.c
@@ -425,6 +425,20 @@  int kvmppc_core_set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
 	return kvmppc_set_sregs_ivor(vcpu, sregs);
 }
 
+int kvmppc_get_one_reg(struct kvm_vcpu *vcpu, u64 id,
+			union kvmppc_one_reg *val)
+{
+	int r = kvmppc_get_one_reg_500_tlb(vcpu, id, val);
+	return r;
+}
+
+int kvmppc_set_one_reg(struct kvm_vcpu *vcpu, u64 id,
+		       union kvmppc_one_reg *val)
+{
+	int r = kvmppc_get_one_reg_500_tlb(vcpu, id, val);
+	return r;
+}
+
 struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
 {
 	struct kvmppc_vcpu_e500 *vcpu_e500;
diff --git a/arch/powerpc/kvm/e500.h b/arch/powerpc/kvm/e500.h
index 41cefd4..fe17f40 100644
--- a/arch/powerpc/kvm/e500.h
+++ b/arch/powerpc/kvm/e500.h
@@ -139,6 +139,10 @@  void kvmppc_e500_tlb_uninit(struct kvmppc_vcpu_e500 *vcpu_e500);
 void kvmppc_get_sregs_e500_tlb(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
 int kvmppc_set_sregs_e500_tlb(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
 
+int kvmppc_get_one_reg_500_tlb(struct kvm_vcpu *vcpu, u64 id,
+				union kvmppc_one_reg *val);
+int kvmppc_set_one_reg_500_tlb(struct kvm_vcpu *vcpu, u64 id,
+			       union kvmppc_one_reg *val);
 
 #ifdef CONFIG_KVM_E500V2
 unsigned int kvmppc_e500_get_sid(struct kvmppc_vcpu_e500 *vcpu_e500,
diff --git a/arch/powerpc/kvm/e500_mmu.c b/arch/powerpc/kvm/e500_mmu.c
index 66b6e31..b77b855 100644
--- a/arch/powerpc/kvm/e500_mmu.c
+++ b/arch/powerpc/kvm/e500_mmu.c
@@ -596,6 +596,95 @@  int kvmppc_set_sregs_e500_tlb(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
 	return 0;
 }
 
+int kvmppc_get_one_reg_500_tlb(struct kvm_vcpu *vcpu, u64 id,
+				union kvmppc_one_reg *val)
+{
+	int r = 0;
+	long int i;
+
+	switch (id) {
+	case KVM_REG_PPC_MAS0:
+		*val = get_reg_val(id, vcpu->arch.shared->mas0);
+	case KVM_REG_PPC_MAS1:
+		*val = get_reg_val(id, vcpu->arch.shared->mas1);
+	case KVM_REG_PPC_MAS2:
+		*val = get_reg_val(id, vcpu->arch.shared->mas2);
+	case KVM_REG_PPC_MAS7_3:
+		*val = get_reg_val(id, vcpu->arch.shared->mas7_3);
+	case KVM_REG_PPC_MAS4:
+		*val = get_reg_val(id, vcpu->arch.shared->mas4);
+	case KVM_REG_PPC_MAS6:
+		*val = get_reg_val(id, vcpu->arch.shared->mas6);
+	case KVM_REG_PPC_MMUCFG:
+		*val = get_reg_val(id, vcpu->arch.mmucfg);
+	case KVM_REG_PPC_TLB0CFG:
+	case KVM_REG_PPC_TLB1CFG:
+	case KVM_REG_PPC_TLB2CFG:
+	case KVM_REG_PPC_TLB3CFG:
+		i = id - KVM_REG_PPC_TLB0CFG;
+		*val = get_reg_val(id, vcpu->arch.tlbcfg[i]);
+	default:
+		r = -EINVAL;
+		break;
+	}
+
+	return r;
+}
+
+int kvmppc_set_one_reg_500_tlb(struct kvm_vcpu *vcpu, u64 id,
+			       union kvmppc_one_reg *val)
+{
+	int r = 0;
+	long int i;
+
+	switch (id) {
+	case KVM_REG_PPC_MAS0:
+		vcpu->arch.shared->mas0 = set_reg_val(id, *val);
+		break;
+	case KVM_REG_PPC_MAS1:
+		vcpu->arch.shared->mas1 = set_reg_val(id, *val);
+		break;
+	case KVM_REG_PPC_MAS2:
+		vcpu->arch.shared->mas2 = set_reg_val(id, *val);
+		break;
+	case KVM_REG_PPC_MAS7_3:
+		vcpu->arch.shared->mas7_3 = set_reg_val(id, *val);
+		break;
+	case KVM_REG_PPC_MAS4:
+		vcpu->arch.shared->mas4 = set_reg_val(id, *val);
+		break;
+	case KVM_REG_PPC_MAS6:
+		vcpu->arch.shared->mas6 = set_reg_val(id, *val);
+		break;
+	case KVM_REG_PPC_MMUCFG: {
+		u32 mmucfg = set_reg_val(id, *val);
+		vcpu->arch.mmucfg = mmucfg & ~MMUCFG_LPIDSIZE;
+		break;
+	}
+	case KVM_REG_PPC_TLB0CFG:
+	case KVM_REG_PPC_TLB1CFG:
+	case KVM_REG_PPC_TLB2CFG:
+	case KVM_REG_PPC_TLB3CFG: {
+		u32 tlbncfg = set_reg_val(id, *val);				
+		u32 geometry_mask = TLBnCFG_N_ENTRY | TLBnCFG_ASSOC;
+		i = id - KVM_REG_PPC_TLB0CFG;
+
+		/* MMU geometry (way/size) can be set only using SW_TLB */
+		if ((vcpu->arch.tlbcfg[i] & geometry_mask) !=
+		    (tlbncfg & geometry_mask))
+			r = -EINVAL;
+
+		vcpu->arch.tlbcfg[i] = set_reg_val(id, *val);
+		break;
+	}
+	default:
+		r = -EINVAL;
+		break;
+	}
+
+	return r;
+}
+
 static int vcpu_mmu_geometry_update(struct kvm_vcpu *vcpu,
 		struct kvm_book3e_206_tlb_params *params)
 {
diff --git a/arch/powerpc/kvm/e500mc.c b/arch/powerpc/kvm/e500mc.c
index 1f89d26..c255259 100644
--- a/arch/powerpc/kvm/e500mc.c
+++ b/arch/powerpc/kvm/e500mc.c
@@ -255,6 +255,20 @@  int kvmppc_core_set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
 	return kvmppc_set_sregs_ivor(vcpu, sregs);
 }
 
+int kvmppc_get_one_reg(struct kvm_vcpu *vcpu, u64 id,
+			union kvmppc_one_reg *val)
+{
+	int r = kvmppc_get_one_reg_500_tlb(vcpu, id, val);
+	return r;
+}
+
+int kvmppc_set_one_reg(struct kvm_vcpu *vcpu, u64 id,
+		       union kvmppc_one_reg *val)
+{
+	int r = kvmppc_set_one_reg_500_tlb(vcpu, id, val);
+	return r;
+}
+
 struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
 {
 	struct kvmppc_vcpu_e500 *vcpu_e500;
@@ -337,6 +351,7 @@  static int __init kvmppc_e500mc_init(void)
 	return kvm_init(NULL, sizeof(struct kvmppc_vcpu_e500), 0, THIS_MODULE);
 }
 
+
 static void __exit kvmppc_e500mc_exit(void)
 {
 	kvmppc_booke_exit();