Commit 7753ea09 authored by Linus Torvalds's avatar Linus Torvalds

Merge tag 'kvm-4.15-2' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull KVM updates from Radim Krčmář:
 "Trimmed second batch of KVM changes for Linux 4.15:

   - GICv4 Support for KVM/ARM

   - re-introduce support for CPUs without virtual NMI (cc stable) and
     allow testing of KVM without virtual NMI on available CPUs

   - fix long-standing performance issues with assigned devices on AMD
     (cc stable)"

* tag 'kvm-4.15-2' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (30 commits)
  kvm: vmx: Allow disabling virtual NMI support
  kvm: vmx: Reinstate support for CPUs without virtual NMI
  KVM: SVM: obey guest PAT
  KVM: arm/arm64: Don't queue VLPIs on INV/INVALL
  KVM: arm/arm64: Fix GICv4 ITS initialization issues
  KVM: arm/arm64: GICv4: Theory of operations
  KVM: arm/arm64: GICv4: Enable VLPI support
  KVM: arm/arm64: GICv4: Prevent userspace from changing doorbell affinity
  KVM: arm/arm64: GICv4: Prevent a VM using GICv4 from being saved
  KVM: arm/arm64: GICv4: Enable virtual cpuif if VLPIs can be delivered
  KVM: arm/arm64: GICv4: Hook vPE scheduling into vgic flush/sync
  KVM: arm/arm64: GICv4: Use the doorbell interrupt as an unblocking source
  KVM: arm/arm64: GICv4: Add doorbell interrupt handling
  KVM: arm/arm64: GICv4: Use pending_last as a scheduling hint
  KVM: arm/arm64: GICv4: Handle INVALL applied to a vPE
  KVM: arm/arm64: GICv4: Propagate property updates to VLPIs
  KVM: arm/arm64: GICv4: Handle MOVALL applied to a vPE
  KVM: arm/arm64: GICv4: Handle CLEAR applied to a VLPI
  KVM: arm/arm64: GICv4: Propagate affinity changes to the physical ITS
  KVM: arm/arm64: GICv4: Unmap VLPI when freeing an LPI
  ...
parents 83ada031 d02fcf50
......@@ -1890,6 +1890,10 @@
[KVM,ARM] Trap guest accesses to GICv3 common
system registers
kvm-arm.vgic_v4_enable=
[KVM,ARM] Allow use of GICv4 for direct injection of
LPIs.
kvm-intel.ept= [KVM,Intel] Disable extended page tables
(virtualized MMU) support on capable Intel chips.
Default is 1 (enabled)
......
......@@ -64,6 +64,8 @@ Groups:
-EINVAL: Inconsistent restored data
-EFAULT: Invalid guest ram access
-EBUSY: One or more VCPUS are running
-EACCES: The virtual ITS is backed by a physical GICv4 ITS, and the
state is not available
KVM_DEV_ARM_VGIC_GRP_ITS_REGS
Attributes:
......
......@@ -4,6 +4,7 @@
#
source "virt/kvm/Kconfig"
source "virt/lib/Kconfig"
menuconfig VIRTUALIZATION
bool "Virtualization"
......@@ -23,6 +24,8 @@ config KVM
select PREEMPT_NOTIFIERS
select ANON_INODES
select ARM_GIC
select ARM_GIC_V3
select ARM_GIC_V3_ITS
select HAVE_KVM_CPU_RELAX_INTERCEPT
select HAVE_KVM_ARCH_TLB_FLUSH_ALL
select KVM_MMIO
......@@ -36,6 +39,8 @@ config KVM
select HAVE_KVM_IRQCHIP
select HAVE_KVM_IRQ_ROUTING
select HAVE_KVM_MSI
select IRQ_BYPASS_MANAGER
select HAVE_KVM_IRQ_BYPASS
depends on ARM_VIRT_EXT && ARM_LPAE && ARM_ARCH_TIMER
---help---
Support hosting virtualized guest machines.
......
......@@ -32,6 +32,7 @@ obj-y += $(KVM)/arm/vgic/vgic-init.o
obj-y += $(KVM)/arm/vgic/vgic-irqfd.o
obj-y += $(KVM)/arm/vgic/vgic-v2.o
obj-y += $(KVM)/arm/vgic/vgic-v3.o
obj-y += $(KVM)/arm/vgic/vgic-v4.o
obj-y += $(KVM)/arm/vgic/vgic-mmio.o
obj-y += $(KVM)/arm/vgic/vgic-mmio-v2.o
obj-y += $(KVM)/arm/vgic/vgic-mmio-v3.o
......
......@@ -4,6 +4,7 @@
#
source "virt/kvm/Kconfig"
source "virt/lib/Kconfig"
menuconfig VIRTUALIZATION
bool "Virtualization"
......@@ -36,6 +37,8 @@ config KVM
select HAVE_KVM_MSI
select HAVE_KVM_IRQCHIP
select HAVE_KVM_IRQ_ROUTING
select IRQ_BYPASS_MANAGER
select HAVE_KVM_IRQ_BYPASS
---help---
Support hosting virtualized guest machines.
We don't support KVM with 16K page tables yet, due to the multiple
......
......@@ -27,6 +27,7 @@ kvm-$(CONFIG_KVM_ARM_HOST) += $(KVM)/arm/vgic/vgic-init.o
kvm-$(CONFIG_KVM_ARM_HOST) += $(KVM)/arm/vgic/vgic-irqfd.o
kvm-$(CONFIG_KVM_ARM_HOST) += $(KVM)/arm/vgic/vgic-v2.o
kvm-$(CONFIG_KVM_ARM_HOST) += $(KVM)/arm/vgic/vgic-v3.o
kvm-$(CONFIG_KVM_ARM_HOST) += $(KVM)/arm/vgic/vgic-v4.o
kvm-$(CONFIG_KVM_ARM_HOST) += $(KVM)/arm/vgic/vgic-mmio.o
kvm-$(CONFIG_KVM_ARM_HOST) += $(KVM)/arm/vgic/vgic-mmio-v2.o
kvm-$(CONFIG_KVM_ARM_HOST) += $(KVM)/arm/vgic/vgic-mmio-v3.o
......
......@@ -3671,6 +3671,13 @@ static int svm_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr)
u32 ecx = msr->index;
u64 data = msr->data;
switch (ecx) {
case MSR_IA32_CR_PAT:
if (!kvm_mtrr_valid(vcpu, MSR_IA32_CR_PAT, data))
return 1;
vcpu->arch.pat = data;
svm->vmcb->save.g_pat = data;
mark_dirty(svm->vmcb, VMCB_NPT);
break;
case MSR_IA32_TSC:
kvm_write_tsc(vcpu, msr);
break;
......
This diff is collapsed.
......@@ -26,6 +26,8 @@
#include <linux/list.h>
#include <linux/jump_label.h>
#include <linux/irqchip/arm-gic-v4.h>
#define VGIC_V3_MAX_CPUS 255
#define VGIC_V2_MAX_CPUS 8
#define VGIC_NR_IRQS_LEGACY 256
......@@ -73,6 +75,9 @@ struct vgic_global {
/* Only needed for the legacy KVM_CREATE_IRQCHIP */
bool can_emulate_gicv2;
/* Hardware has GICv4? */
bool has_gicv4;
/* GIC system register CPU interface */
struct static_key_false gicv3_cpuif;
......@@ -116,6 +121,7 @@ struct vgic_irq {
bool hw; /* Tied to HW IRQ */
struct kref refcount; /* Used for LPIs */
u32 hwintid; /* HW INTID number */
unsigned int host_irq; /* linux irq corresponding to hwintid */
union {
u8 targets; /* GICv2 target VCPUs mask */
u32 mpidr; /* GICv3 target VCPU */
......@@ -232,6 +238,15 @@ struct vgic_dist {
/* used by vgic-debug */
struct vgic_state_iter *iter;
/*
* GICv4 ITS per-VM data, containing the IRQ domain, the VPE
* array, the property table pointer as well as allocation
* data. This essentially ties the Linux IRQ core and ITS
* together, and avoids leaking KVM's data structures anywhere
* else.
*/
struct its_vm its_vm;
};
struct vgic_v2_cpu_if {
......@@ -250,6 +265,14 @@ struct vgic_v3_cpu_if {
u32 vgic_ap0r[4];
u32 vgic_ap1r[4];
u64 vgic_lr[VGIC_V3_MAX_LRS];
/*
* GICv4 ITS per-VPE data, containing the doorbell IRQ, the
* pending table pointer, the its_vm pointer and a few other
* HW specific things. As for the its_vm structure, this is
* linking the Linux IRQ subsystem and the ITS together.
*/
struct its_vpe its_vpe;
};
struct vgic_cpu {
......@@ -307,9 +330,10 @@ void kvm_vgic_init_cpu_hardware(void);
int kvm_vgic_inject_irq(struct kvm *kvm, int cpuid, unsigned int intid,
bool level, void *owner);
int kvm_vgic_map_phys_irq(struct kvm_vcpu *vcpu, u32 virt_irq, u32 phys_irq);
int kvm_vgic_unmap_phys_irq(struct kvm_vcpu *vcpu, unsigned int virt_irq);
bool kvm_vgic_map_is_active(struct kvm_vcpu *vcpu, unsigned int virt_irq);
int kvm_vgic_map_phys_irq(struct kvm_vcpu *vcpu, unsigned int host_irq,
u32 vintid);
int kvm_vgic_unmap_phys_irq(struct kvm_vcpu *vcpu, unsigned int vintid);
bool kvm_vgic_map_is_active(struct kvm_vcpu *vcpu, unsigned int vintid);
int kvm_vgic_vcpu_pending_irq(struct kvm_vcpu *vcpu);
......@@ -349,4 +373,15 @@ int kvm_vgic_setup_default_irq_routing(struct kvm *kvm);
int kvm_vgic_set_owner(struct kvm_vcpu *vcpu, unsigned int intid, void *owner);
struct kvm_kernel_irq_routing_entry;
int kvm_vgic_v4_set_forwarding(struct kvm *kvm, int irq,
struct kvm_kernel_irq_routing_entry *irq_entry);
int kvm_vgic_v4_unset_forwarding(struct kvm *kvm, int irq,
struct kvm_kernel_irq_routing_entry *irq_entry);
void kvm_vgic_v4_enable_doorbell(struct kvm_vcpu *vcpu);
void kvm_vgic_v4_disable_doorbell(struct kvm_vcpu *vcpu);
#endif /* __KVM_ARM_VGIC_H */
......@@ -817,9 +817,6 @@ int kvm_timer_enable(struct kvm_vcpu *vcpu)
{
struct arch_timer_cpu *timer = &vcpu->arch.timer_cpu;
struct arch_timer_context *vtimer = vcpu_vtimer(vcpu);
struct irq_desc *desc;
struct irq_data *data;
int phys_irq;
int ret;
if (timer->enabled)
......@@ -837,26 +834,7 @@ int kvm_timer_enable(struct kvm_vcpu *vcpu)
return -EINVAL;
}
/*
* Find the physical IRQ number corresponding to the host_vtimer_irq
*/
desc = irq_to_desc(host_vtimer_irq);
if (!desc) {
kvm_err("%s: no interrupt descriptor\n", __func__);
return -EINVAL;
}
data = irq_desc_get_irq_data(desc);
while (data->parent_data)
data = data->parent_data;
phys_irq = data->hwirq;
/*
* Tell the VGIC that the virtual interrupt is tied to a
* physical interrupt. We do that once per VCPU.
*/
ret = kvm_vgic_map_phys_irq(vcpu, vtimer->irq.irq, phys_irq);
ret = kvm_vgic_map_phys_irq(vcpu, host_vtimer_irq, vtimer->irq.irq);
if (ret)
return ret;
......
......@@ -27,6 +27,8 @@
#include <linux/mman.h>
#include <linux/sched.h>
#include <linux/kvm.h>
#include <linux/kvm_irqfd.h>
#include <linux/irqbypass.h>
#include <trace/events/kvm.h>
#include <kvm/arm_pmu.h>
......@@ -175,6 +177,8 @@ void kvm_arch_destroy_vm(struct kvm *kvm)
{
int i;
kvm_vgic_destroy(kvm);
free_percpu(kvm->arch.last_vcpu_ran);
kvm->arch.last_vcpu_ran = NULL;
......@@ -184,8 +188,6 @@ void kvm_arch_destroy_vm(struct kvm *kvm)
kvm->vcpus[i] = NULL;
}
}
kvm_vgic_destroy(kvm);
}
int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
......@@ -313,11 +315,13 @@ int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu)
{
kvm_timer_schedule(vcpu);
kvm_vgic_v4_enable_doorbell(vcpu);
}
void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu)
{
kvm_timer_unschedule(vcpu);
kvm_vgic_v4_disable_doorbell(vcpu);
}
int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
......@@ -1450,6 +1454,46 @@ struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, unsigned long mpidr)
return NULL;
}
bool kvm_arch_has_irq_bypass(void)
{
return true;
}
int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer *cons,
struct irq_bypass_producer *prod)
{
struct kvm_kernel_irqfd *irqfd =
container_of(cons, struct kvm_kernel_irqfd, consumer);
return kvm_vgic_v4_set_forwarding(irqfd->kvm, prod->irq,
&irqfd->irq_entry);
}
void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer *cons,
struct irq_bypass_producer *prod)
{
struct kvm_kernel_irqfd *irqfd =
container_of(cons, struct kvm_kernel_irqfd, consumer);
kvm_vgic_v4_unset_forwarding(irqfd->kvm, prod->irq,
&irqfd->irq_entry);
}
void kvm_arch_irq_bypass_stop(struct irq_bypass_consumer *cons)
{
struct kvm_kernel_irqfd *irqfd =
container_of(cons, struct kvm_kernel_irqfd, consumer);
kvm_arm_halt_guest(irqfd->kvm);
}
void kvm_arch_irq_bypass_start(struct irq_bypass_consumer *cons)
{
struct kvm_kernel_irqfd *irqfd =
container_of(cons, struct kvm_kernel_irqfd, consumer);
kvm_arm_resume_guest(irqfd->kvm);
}
/**
* Initialize Hyp-mode and memory mappings on all CPUs.
*/
......
......@@ -258,7 +258,8 @@ void __hyp_text __vgic_v3_save_state(struct kvm_vcpu *vcpu)
cpu_if->vgic_ap1r[0] = __vgic_v3_read_ap1rn(0);
}
} else {
if (static_branch_unlikely(&vgic_v3_cpuif_trap))
if (static_branch_unlikely(&vgic_v3_cpuif_trap) ||
cpu_if->its_vpe.its_vm)
write_gicreg(0, ICH_HCR_EL2);
cpu_if->vgic_elrsr = 0xffff;
......@@ -337,9 +338,11 @@ void __hyp_text __vgic_v3_restore_state(struct kvm_vcpu *vcpu)
/*
* If we need to trap system registers, we must write
* ICH_HCR_EL2 anyway, even if no interrupts are being
* injected,
* injected. Same thing if GICv4 is used, as VLPI
* delivery is gated by ICH_HCR_EL2.En.
*/
if (static_branch_unlikely(&vgic_v3_cpuif_trap))
if (static_branch_unlikely(&vgic_v3_cpuif_trap) ||
cpu_if->its_vpe.its_vm)
write_gicreg(cpu_if->vgic_hcr, ICH_HCR_EL2);
}
......
......@@ -285,6 +285,10 @@ int vgic_init(struct kvm *kvm)
if (ret)
goto out;
ret = vgic_v4_init(kvm);
if (ret)
goto out;
kvm_for_each_vcpu(i, vcpu, kvm)
kvm_vgic_vcpu_enable(vcpu);
......@@ -320,6 +324,9 @@ static void kvm_vgic_dist_destroy(struct kvm *kvm)
kfree(dist->spis);
dist->nr_spis = 0;
if (vgic_supports_direct_msis(kvm))
vgic_v4_teardown(kvm);
}
void kvm_vgic_vcpu_destroy(struct kvm_vcpu *vcpu)
......
This diff is collapsed.
......@@ -54,6 +54,11 @@ bool vgic_has_its(struct kvm *kvm)
return dist->has_its;
}
bool vgic_supports_direct_msis(struct kvm *kvm)
{
return kvm_vgic_global_state.has_gicv4 && vgic_has_its(kvm);
}
static unsigned long vgic_mmio_read_v3_misc(struct kvm_vcpu *vcpu,
gpa_t addr, unsigned int len)
{
......
......@@ -24,6 +24,7 @@
static bool group0_trap;
static bool group1_trap;
static bool common_trap;
static bool gicv4_enable;
void vgic_v3_set_underflow(struct kvm_vcpu *vcpu)
{
......@@ -461,6 +462,12 @@ static int __init early_common_trap_cfg(char *buf)
}
early_param("kvm-arm.vgic_v3_common_trap", early_common_trap_cfg);
static int __init early_gicv4_enable(char *buf)
{
return strtobool(buf, &gicv4_enable);
}
early_param("kvm-arm.vgic_v4_enable", early_gicv4_enable);
/**
* vgic_v3_probe - probe for a GICv3 compatible interrupt controller in DT
* @node: pointer to the DT node
......@@ -480,6 +487,13 @@ int vgic_v3_probe(const struct gic_kvm_info *info)
kvm_vgic_global_state.can_emulate_gicv2 = false;
kvm_vgic_global_state.ich_vtr_el2 = ich_vtr_el2;
/* GICv4 support? */
if (info->has_v4) {
kvm_vgic_global_state.has_gicv4 = gicv4_enable;
kvm_info("GICv4 support %sabled\n",
gicv4_enable ? "en" : "dis");
}
if (!info->vcpu.start) {
kvm_info("GICv3: no GICV resource entry\n");
kvm_vgic_global_state.vcpu_base = 0;
......
This diff is collapsed.
......@@ -17,6 +17,8 @@
#include <linux/kvm.h>
#include <linux/kvm_host.h>
#include <linux/list_sort.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include "vgic.h"
......@@ -409,25 +411,56 @@ int kvm_vgic_inject_irq(struct kvm *kvm, int cpuid, unsigned int intid,
return 0;
}
int kvm_vgic_map_phys_irq(struct kvm_vcpu *vcpu, u32 virt_irq, u32 phys_irq)
/* @irq->irq_lock must be held */
static int kvm_vgic_map_irq(struct kvm_vcpu *vcpu, struct vgic_irq *irq,
unsigned int host_irq)
{
struct vgic_irq *irq = vgic_get_irq(vcpu->kvm, vcpu, virt_irq);
struct irq_desc *desc;
struct irq_data *data;
/*
* Find the physical IRQ number corresponding to @host_irq
*/
desc = irq_to_desc(host_irq);
if (!desc) {
kvm_err("%s: no interrupt descriptor\n", __func__);
return -EINVAL;
}
data = irq_desc_get_irq_data(desc);
while (data->parent_data)
data = data->parent_data;
irq->hw = true;
irq->host_irq = host_irq;
irq->hwintid = data->hwirq;
return 0;
}
/* @irq->irq_lock must be held */
static inline void kvm_vgic_unmap_irq(struct vgic_irq *irq)
{
irq->hw = false;
irq->hwintid = 0;
}
int kvm_vgic_map_phys_irq(struct kvm_vcpu *vcpu, unsigned int host_irq,
u32 vintid)
{
struct vgic_irq *irq = vgic_get_irq(vcpu->kvm, vcpu, vintid);
unsigned long flags;
int ret;
BUG_ON(!irq);
spin_lock_irqsave(&irq->irq_lock, flags);
irq->hw = true;
irq->hwintid = phys_irq;
ret = kvm_vgic_map_irq(vcpu, irq, host_irq);
spin_unlock_irqrestore(&irq->irq_lock, flags);
vgic_put_irq(vcpu->kvm, irq);
return 0;
return ret;
}
int kvm_vgic_unmap_phys_irq(struct kvm_vcpu *vcpu, unsigned int virt_irq)
int kvm_vgic_unmap_phys_irq(struct kvm_vcpu *vcpu, unsigned int vintid)
{
struct vgic_irq *irq;
unsigned long flags;
......@@ -435,14 +468,11 @@ int kvm_vgic_unmap_phys_irq(struct kvm_vcpu *vcpu, unsigned int virt_irq)
if (!vgic_initialized(vcpu->kvm))
return -EAGAIN;
irq = vgic_get_irq(vcpu->kvm, vcpu, virt_irq);
irq = vgic_get_irq(vcpu->kvm, vcpu, vintid);
BUG_ON(!irq);
spin_lock_irqsave(&irq->irq_lock, flags);
irq->hw = false;
irq->hwintid = 0;
kvm_vgic_unmap_irq(irq);
spin_unlock_irqrestore(&irq->irq_lock, flags);
vgic_put_irq(vcpu->kvm, irq);
......@@ -688,6 +718,8 @@ void kvm_vgic_sync_hwstate(struct kvm_vcpu *vcpu)
{
struct vgic_cpu *vgic_cpu = &vcpu->arch.vgic_cpu;
WARN_ON(vgic_v4_sync_hwstate(vcpu));
/* An empty ap_list_head implies used_lrs == 0 */
if (list_empty(&vcpu->arch.vgic_cpu.ap_list_head))
return;
......@@ -700,6 +732,8 @@ void kvm_vgic_sync_hwstate(struct kvm_vcpu *vcpu)
/* Flush our emulation state into the GIC hardware before entering the guest. */
void kvm_vgic_flush_hwstate(struct kvm_vcpu *vcpu)
{
WARN_ON(vgic_v4_flush_hwstate(vcpu));
/*
* If there are no virtual interrupts active or pending for this
* VCPU, then there is no work to do and we can bail out without
......@@ -751,6 +785,9 @@ int kvm_vgic_vcpu_pending_irq(struct kvm_vcpu *vcpu)
if (!vcpu->kvm->arch.vgic.enabled)
return false;
if (vcpu->arch.vgic_cpu.vgic_v3.its_vpe.pending_last)
return true;
spin_lock_irqsave(&vgic_cpu->ap_list_lock, flags);
list_for_each_entry(irq, &vgic_cpu->ap_list_head, ap_list) {
......@@ -784,9 +821,9 @@ void vgic_kick_vcpus(struct kvm *kvm)
}
}
bool kvm_vgic_map_is_active(struct kvm_vcpu *vcpu, unsigned int virt_irq)
bool kvm_vgic_map_is_active(struct kvm_vcpu *vcpu, unsigned int vintid)
{
struct vgic_irq *irq = vgic_get_irq(vcpu->kvm, vcpu, virt_irq);
struct vgic_irq *irq = vgic_get_irq(vcpu->kvm, vcpu, vintid);
bool map_is_active;
unsigned long flags;
......
......@@ -237,4 +237,14 @@ static inline int vgic_v3_max_apr_idx(struct kvm_vcpu *vcpu)
}
}
int vgic_its_resolve_lpi(struct kvm *kvm, struct vgic_its *its,
u32 devid, u32 eventid, struct vgic_irq **irq);
struct vgic_its *vgic_msi_to_its(struct kvm *kvm, struct kvm_msi *msi);
bool vgic_supports_direct_msis(struct kvm *kvm);
int vgic_v4_init(struct kvm *kvm);
void vgic_v4_teardown(struct kvm *kvm);
int vgic_v4_sync_hwstate(struct kvm_vcpu *vcpu);
int vgic_v4_flush_hwstate(struct kvm_vcpu *vcpu);
#endif
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