Merge tag 'kvm-4.15-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull KVM updates from Radim Krčmář:
 "First batch of KVM changes for 4.15

  Common:
   - Python 3 support in kvm_stat
   - Accounting of slabs to kmemcg

  ARM:
   - Optimized arch timer handling for KVM/ARM
   - Improvements to the VGIC ITS code and introduction of an ITS reset
     ioctl
   - Unification of the 32-bit fault injection logic
   - More exact external abort matching logic

  PPC:
   - Support for running hashed page table (HPT) MMU mode on a host that
     is using the radix MMU mode; single threaded mode on POWER 9 is
     added as a pre-requisite
   - Resolution of merge conflicts with the last second 4.14 HPT fixes
   - Fixes and cleanups

  s390:
   - Some initial preparation patches for exitless interrupts and crypto
   - New capability for AIS migration
   - Fixes

  x86:
   - Improved emulation of LAPIC timer mode changes, MCi_STATUS MSRs,
     and after-reset state
   - Refined dependencies for VMX features
   - Fixes for nested SMI injection
   - A lot of cleanups"

* tag 'kvm-4.15-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (89 commits)
  KVM: s390: provide a capability for AIS state migration
  KVM: s390: clear_io_irq() requests are not expected for adapter interrupts
  KVM: s390: abstract conversion between isc and enum irq_types
  KVM: s390: vsie: use common code functions for pinning
  KVM: s390: SIE considerations for AP Queue virtualization
  KVM: s390: document memory ordering for kvm_s390_vcpu_wakeup
  KVM: PPC: Book3S HV: Cosmetic post-merge cleanups
  KVM: arm/arm64: fix the incompatible matching for external abort
  KVM: arm/arm64: Unify 32bit fault injection
  KVM: arm/arm64: vgic-its: Implement KVM_DEV_ARM_ITS_CTRL_RESET
  KVM: arm/arm64: Document KVM_DEV_ARM_ITS_CTRL_RESET
  KVM: arm/arm64: vgic-its: Free caches when GITS_BASER Valid bit is cleared
  KVM: arm/arm64: vgic-its: New helper functions to free the caches
  KVM: arm/arm64: vgic-its: Remove kvm_its_unmap_device
  arm/arm64: KVM: Load the timer state when enabling the timer
  KVM: arm/arm64: Rework kvm_timer_should_fire
  KVM: arm/arm64: Get rid of kvm_timer_flush_hwstate
  KVM: arm/arm64: Avoid phys timer emulation in vcpu entry/exit
  KVM: arm/arm64: Move phys_timer_emulate function
  KVM: arm/arm64: Use kvm_arm_timer_set/get_reg for guest register traps
  ...

6 files changed, 49 insertions, 146 deletions

diff --git a/arch/arm/include/asm/kvm_asm.h b/arch/arm/include/asm/kvm_asm.h
index 14d68a4d826f..36dd2962a42d 100644
--- a/arch/arm/include/asm/kvm_asm.h
+++ b/arch/arm/include/asm/kvm_asm.h
@@ -68,6 +68,8 @@ extern void __kvm_tlb_flush_vmid_ipa(struct kvm *kvm, phys_addr_t ipa);
 extern void __kvm_tlb_flush_vmid(struct kvm *kvm);
 extern void __kvm_tlb_flush_local_vmid(struct kvm_vcpu *vcpu);
 
+extern void __kvm_timer_set_cntvoff(u32 cntvoff_low, u32 cntvoff_high);
+
 extern int __kvm_vcpu_run(struct kvm_vcpu *vcpu);
 
 extern void __init_stage2_translation(void);
diff --git a/arch/arm/include/asm/kvm_emulate.h b/arch/arm/include/asm/kvm_emulate.h
index 98089ffd91bb..3d22eb87f919 100644
--- a/arch/arm/include/asm/kvm_emulate.h
+++ b/arch/arm/include/asm/kvm_emulate.h
@@ -25,7 +25,22 @@
 #include <asm/kvm_arm.h>
 #include <asm/cputype.h>
 
+/* arm64 compatibility macros */
+#define COMPAT_PSR_MODE_ABT	ABT_MODE
+#define COMPAT_PSR_MODE_UND	UND_MODE
+#define COMPAT_PSR_T_BIT	PSR_T_BIT
+#define COMPAT_PSR_I_BIT	PSR_I_BIT
+#define COMPAT_PSR_A_BIT	PSR_A_BIT
+#define COMPAT_PSR_E_BIT	PSR_E_BIT
+#define COMPAT_PSR_IT_MASK	PSR_IT_MASK
+
 unsigned long *vcpu_reg(struct kvm_vcpu *vcpu, u8 reg_num);
+
+static inline unsigned long *vcpu_reg32(struct kvm_vcpu *vcpu, u8 reg_num)
+{
+	return vcpu_reg(vcpu, reg_num);
+}
+
 unsigned long *vcpu_spsr(struct kvm_vcpu *vcpu);
 
 static inline unsigned long vcpu_get_reg(struct kvm_vcpu *vcpu,
@@ -42,10 +57,25 @@ static inline void vcpu_set_reg(struct kvm_vcpu *vcpu, u8 reg_num,
 
 bool kvm_condition_valid32(const struct kvm_vcpu *vcpu);
 void kvm_skip_instr32(struct kvm_vcpu *vcpu, bool is_wide_instr);
-void kvm_inject_undefined(struct kvm_vcpu *vcpu);
+void kvm_inject_undef32(struct kvm_vcpu *vcpu);
+void kvm_inject_dabt32(struct kvm_vcpu *vcpu, unsigned long addr);
+void kvm_inject_pabt32(struct kvm_vcpu *vcpu, unsigned long addr);
 void kvm_inject_vabt(struct kvm_vcpu *vcpu);
-void kvm_inject_dabt(struct kvm_vcpu *vcpu, unsigned long addr);
-void kvm_inject_pabt(struct kvm_vcpu *vcpu, unsigned long addr);
+
+static inline void kvm_inject_undefined(struct kvm_vcpu *vcpu)
+{
+	kvm_inject_undef32(vcpu);
+}
+
+static inline void kvm_inject_dabt(struct kvm_vcpu *vcpu, unsigned long addr)
+{
+	kvm_inject_dabt32(vcpu, addr);
+}
+
+static inline void kvm_inject_pabt(struct kvm_vcpu *vcpu, unsigned long addr)
+{
+	kvm_inject_pabt32(vcpu, addr);
+}
 
 static inline bool kvm_condition_valid(const struct kvm_vcpu *vcpu)
 {
@@ -203,7 +233,7 @@ static inline u8 kvm_vcpu_trap_get_fault_type(struct kvm_vcpu *vcpu)
 
 static inline bool kvm_vcpu_dabt_isextabt(struct kvm_vcpu *vcpu)
 {
-	switch (kvm_vcpu_trap_get_fault_type(vcpu)) {
+	switch (kvm_vcpu_trap_get_fault(vcpu)) {
 	case FSC_SEA:
 	case FSC_SEA_TTW0:
 	case FSC_SEA_TTW1:
diff --git a/arch/arm/include/asm/kvm_hyp.h b/arch/arm/include/asm/kvm_hyp.h
index 14b5903f0224..ab20ffa8b9e7 100644
--- a/arch/arm/include/asm/kvm_hyp.h
+++ b/arch/arm/include/asm/kvm_hyp.h
@@ -98,8 +98,8 @@
 #define cntvoff_el2			CNTVOFF
 #define cnthctl_el2			CNTHCTL
 
-void __timer_save_state(struct kvm_vcpu *vcpu);
-void __timer_restore_state(struct kvm_vcpu *vcpu);
+void __timer_enable_traps(struct kvm_vcpu *vcpu);
+void __timer_disable_traps(struct kvm_vcpu *vcpu);
 
 void __vgic_v2_save_state(struct kvm_vcpu *vcpu);
 void __vgic_v2_restore_state(struct kvm_vcpu *vcpu);
diff --git a/arch/arm/include/uapi/asm/kvm.h b/arch/arm/include/uapi/asm/kvm.h
index 1f57bbe82b6f..6edd177bb1c7 100644
--- a/arch/arm/include/uapi/asm/kvm.h
+++ b/arch/arm/include/uapi/asm/kvm.h
@@ -152,6 +152,12 @@ struct kvm_arch_memory_slot {
 	(__ARM_CP15_REG(op1, 0, crm, 0) | KVM_REG_SIZE_U64)
 #define ARM_CP15_REG64(...) __ARM_CP15_REG64(__VA_ARGS__)
 
+/* PL1 Physical Timer Registers */
+#define KVM_REG_ARM_PTIMER_CTL		ARM_CP15_REG32(0, 14, 2, 1)
+#define KVM_REG_ARM_PTIMER_CNT		ARM_CP15_REG64(0, 14)
+#define KVM_REG_ARM_PTIMER_CVAL		ARM_CP15_REG64(2, 14)
+
+/* Virtual Timer Registers */
 #define KVM_REG_ARM_TIMER_CTL		ARM_CP15_REG32(0, 14, 3, 1)
 #define KVM_REG_ARM_TIMER_CNT		ARM_CP15_REG64(1, 14)
 #define KVM_REG_ARM_TIMER_CVAL		ARM_CP15_REG64(3, 14)
@@ -216,6 +222,7 @@ struct kvm_arch_memory_slot {
 #define   KVM_DEV_ARM_ITS_SAVE_TABLES		1
 #define   KVM_DEV_ARM_ITS_RESTORE_TABLES	2
 #define   KVM_DEV_ARM_VGIC_SAVE_PENDING_TABLES	3
+#define   KVM_DEV_ARM_ITS_CTRL_RESET		4
 
 /* KVM_IRQ_LINE irq field index values */
 #define KVM_ARM_IRQ_TYPE_SHIFT		24
diff --git a/arch/arm/kvm/emulate.c b/arch/arm/kvm/emulate.c
index 30a13647c54c..cdff963f133a 100644
--- a/arch/arm/kvm/emulate.c
+++ b/arch/arm/kvm/emulate.c
@@ -165,143 +165,6 @@ unsigned long *vcpu_spsr(struct kvm_vcpu *vcpu)
  * Inject exceptions into the guest
  */
 
-static u32 exc_vector_base(struct kvm_vcpu *vcpu)
-{
-	u32 sctlr = vcpu_cp15(vcpu, c1_SCTLR);
-	u32 vbar = vcpu_cp15(vcpu, c12_VBAR);
-
-	if (sctlr & SCTLR_V)
-		return 0xffff0000;
-	else /* always have security exceptions */
-		return vbar;
-}
-
-/*
- * Switch to an exception mode, updating both CPSR and SPSR. Follow
- * the logic described in AArch32.EnterMode() from the ARMv8 ARM.
- */
-static void kvm_update_psr(struct kvm_vcpu *vcpu, unsigned long mode)
-{
-	unsigned long cpsr = *vcpu_cpsr(vcpu);
-	u32 sctlr = vcpu_cp15(vcpu, c1_SCTLR);
-
-	*vcpu_cpsr(vcpu) = (cpsr & ~MODE_MASK) | mode;
-
-	switch (mode) {
-	case FIQ_MODE:
-		*vcpu_cpsr(vcpu) |= PSR_F_BIT;
-		/* Fall through */
-	case ABT_MODE:
-	case IRQ_MODE:
-		*vcpu_cpsr(vcpu) |= PSR_A_BIT;
-		/* Fall through */
-	default:
-		*vcpu_cpsr(vcpu) |= PSR_I_BIT;
-	}
-
-	*vcpu_cpsr(vcpu) &= ~(PSR_IT_MASK | PSR_J_BIT | PSR_E_BIT | PSR_T_BIT);
-
-	if (sctlr & SCTLR_TE)
-		*vcpu_cpsr(vcpu) |= PSR_T_BIT;
-	if (sctlr & SCTLR_EE)
-		*vcpu_cpsr(vcpu) |= PSR_E_BIT;
-
-	/* Note: These now point to the mode banked copies */
-	*vcpu_spsr(vcpu) = cpsr;
-}
-
-/**
- * kvm_inject_undefined - inject an undefined exception into the guest
- * @vcpu: The VCPU to receive the undefined exception
- *
- * It is assumed that this code is called from the VCPU thread and that the
- * VCPU therefore is not currently executing guest code.
- *
- * Modelled after TakeUndefInstrException() pseudocode.
- */
-void kvm_inject_undefined(struct kvm_vcpu *vcpu)
-{
-	unsigned long cpsr = *vcpu_cpsr(vcpu);
-	bool is_thumb = (cpsr & PSR_T_BIT);
-	u32 vect_offset = 4;
-	u32 return_offset = (is_thumb) ? 2 : 4;
-
-	kvm_update_psr(vcpu, UND_MODE);
-	*vcpu_reg(vcpu, 14) = *vcpu_pc(vcpu) + return_offset;
-
-	/* Branch to exception vector */
-	*vcpu_pc(vcpu) = exc_vector_base(vcpu) + vect_offset;
-}
-
-/*
- * Modelled after TakeDataAbortException() and TakePrefetchAbortException
- * pseudocode.
- */
-static void inject_abt(struct kvm_vcpu *vcpu, bool is_pabt, unsigned long addr)
-{
-	u32 vect_offset;
-	u32 return_offset = (is_pabt) ? 4 : 8;
-	bool is_lpae;
-
-	kvm_update_psr(vcpu, ABT_MODE);
-	*vcpu_reg(vcpu, 14) = *vcpu_pc(vcpu) + return_offset;
-
-	if (is_pabt)
-		vect_offset = 12;
-	else
-		vect_offset = 16;
-
-	/* Branch to exception vector */
-	*vcpu_pc(vcpu) = exc_vector_base(vcpu) + vect_offset;
-
-	if (is_pabt) {
-		/* Set IFAR and IFSR */
-		vcpu_cp15(vcpu, c6_IFAR) = addr;
-		is_lpae = (vcpu_cp15(vcpu, c2_TTBCR) >> 31);
-		/* Always give debug fault for now - should give guest a clue */
-		if (is_lpae)
-			vcpu_cp15(vcpu, c5_IFSR) = 1 << 9 | 0x22;
-		else
-			vcpu_cp15(vcpu, c5_IFSR) = 2;
-	} else { /* !iabt */
-		/* Set DFAR and DFSR */
-		vcpu_cp15(vcpu, c6_DFAR) = addr;
-		is_lpae = (vcpu_cp15(vcpu, c2_TTBCR) >> 31);
-		/* Always give debug fault for now - should give guest a clue */
-		if (is_lpae)
-			vcpu_cp15(vcpu, c5_DFSR) = 1 << 9 | 0x22;
-		else
-			vcpu_cp15(vcpu, c5_DFSR) = 2;
-	}
-
-}
-
-/**
- * kvm_inject_dabt - inject a data abort into the guest
- * @vcpu: The VCPU to receive the undefined exception
- * @addr: The address to report in the DFAR
- *
- * It is assumed that this code is called from the VCPU thread and that the
- * VCPU therefore is not currently executing guest code.
- */
-void kvm_inject_dabt(struct kvm_vcpu *vcpu, unsigned long addr)
-{
-	inject_abt(vcpu, false, addr);
-}
-
-/**
- * kvm_inject_pabt - inject a prefetch abort into the guest
- * @vcpu: The VCPU to receive the undefined exception
- * @addr: The address to report in the DFAR
- *
- * It is assumed that this code is called from the VCPU thread and that the
- * VCPU therefore is not currently executing guest code.
- */
-void kvm_inject_pabt(struct kvm_vcpu *vcpu, unsigned long addr)
-{
-	inject_abt(vcpu, true, addr);
-}
-
 /**
  * kvm_inject_vabt - inject an async abort / SError into the guest
  * @vcpu: The VCPU to receive the exception
diff --git a/arch/arm/kvm/hyp/switch.c b/arch/arm/kvm/hyp/switch.c
index ebd2dd46adf7..330c9ce34ba5 100644
--- a/arch/arm/kvm/hyp/switch.c
+++ b/arch/arm/kvm/hyp/switch.c
@@ -174,7 +174,7 @@ int __hyp_text __kvm_vcpu_run(struct kvm_vcpu *vcpu)
 	__activate_vm(vcpu);
 
 	__vgic_restore_state(vcpu);
-	__timer_restore_state(vcpu);
+	__timer_enable_traps(vcpu);
 
 	__sysreg_restore_state(guest_ctxt);
 	__banked_restore_state(guest_ctxt);
@@ -191,7 +191,8 @@ again:
 
 	__banked_save_state(guest_ctxt);
 	__sysreg_save_state(guest_ctxt);
-	__timer_save_state(vcpu);
+	__timer_disable_traps(vcpu);
+
 	__vgic_save_state(vcpu);
 
 	__deactivate_traps(vcpu);
@@ -237,7 +238,7 @@ void __hyp_text __noreturn __hyp_panic(int cause)
 
 		vcpu = (struct kvm_vcpu *)read_sysreg(HTPIDR);
 		host_ctxt = kern_hyp_va(vcpu->arch.host_cpu_context);
-		__timer_save_state(vcpu);
+		__timer_disable_traps(vcpu);
 		__deactivate_traps(vcpu);
 		__deactivate_vm(vcpu);
 		__banked_restore_state(host_ctxt);