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authorPaolo Bonzini <pbonzini@redhat.com>2018-08-22 15:07:56 +0300
committerPaolo Bonzini <pbonzini@redhat.com>2018-08-22 15:07:56 +0300
commit631989303b06b8fdb15ec3b88aee2d25e80d4cec (patch)
tree25c00dc9392cb7b25e5c9355a6176f6f4be36924
parentad1d69735878a6bf797705b5d2a20316d35e1113 (diff)
parent976d34e2dab10ece5ea8fe7090b7692913f89084 (diff)
downloadlinux-631989303b06b8fdb15ec3b88aee2d25e80d4cec.tar.xz
Merge tag 'kvmarm-for-v4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD
KVM/arm updates for 4.19 - Support for Group0 interrupts in guests - Cache management optimizations for ARMv8.4 systems - Userspace interface for RAS, allowing error retrival and injection - Fault path optimization - Emulated physical timer fixes - Random cleanups
-rw-r--r--Documentation/virtual/kvm/api.txt80
-rw-r--r--Documentation/virtual/kvm/devices/arm-vgic-v3.txt8
-rw-r--r--Documentation/virtual/kvm/devices/arm-vgic.txt15
-rw-r--r--arch/arm/include/asm/kvm_emulate.h12
-rw-r--r--arch/arm/include/asm/kvm_host.h5
-rw-r--r--arch/arm/include/asm/kvm_mmu.h14
-rw-r--r--arch/arm/include/uapi/asm/kvm.h13
-rw-r--r--arch/arm/kvm/coproc.c25
-rw-r--r--arch/arm/kvm/guest.c23
-rw-r--r--arch/arm64/include/asm/cpucaps.h3
-rw-r--r--arch/arm64/include/asm/kvm_arm.h1
-rw-r--r--arch/arm64/include/asm/kvm_emulate.h17
-rw-r--r--arch/arm64/include/asm/kvm_host.h28
-rw-r--r--arch/arm64/include/asm/kvm_mmu.h35
-rw-r--r--arch/arm64/include/asm/memory.h7
-rw-r--r--arch/arm64/include/asm/pgtable-prot.h24
-rw-r--r--arch/arm64/include/asm/sysreg.h3
-rw-r--r--arch/arm64/include/uapi/asm/kvm.h13
-rw-r--r--arch/arm64/kernel/cpufeature.c20
-rw-r--r--arch/arm64/kvm/guest.c33
-rw-r--r--arch/arm64/kvm/hyp-init.S6
-rw-r--r--arch/arm64/kvm/hyp/sysreg-sr.c5
-rw-r--r--arch/arm64/kvm/inject_fault.c6
-rw-r--r--arch/arm64/kvm/reset.c4
-rw-r--r--arch/arm64/kvm/sys_regs.c54
-rw-r--r--include/kvm/arm_vgic.h9
-rw-r--r--include/linux/irqchip/arm-gic-v3.h10
-rw-r--r--include/linux/irqchip/arm-gic.h11
-rw-r--r--include/uapi/linux/kvm.h1
-rw-r--r--virt/kvm/arm/arch_timer.c15
-rw-r--r--virt/kvm/arm/arm.c51
-rw-r--r--virt/kvm/arm/mmu.c87
-rw-r--r--virt/kvm/arm/vgic/vgic-debug.c50
-rw-r--r--virt/kvm/arm/vgic/vgic-init.c24
-rw-r--r--virt/kvm/arm/vgic/vgic-its.c27
-rw-r--r--virt/kvm/arm/vgic/vgic-mmio-v2.c66
-rw-r--r--virt/kvm/arm/vgic/vgic-mmio-v3.c72
-rw-r--r--virt/kvm/arm/vgic/vgic-mmio.c56
-rw-r--r--virt/kvm/arm/vgic/vgic-mmio.h25
-rw-r--r--virt/kvm/arm/vgic/vgic-v2.c10
-rw-r--r--virt/kvm/arm/vgic/vgic-v3.c13
-rw-r--r--virt/kvm/arm/vgic/vgic.c19
-rw-r--r--virt/kvm/arm/vgic/vgic.h7
43 files changed, 834 insertions, 173 deletions
diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt
index 7b83b176c662..0acdbac3a2d7 100644
--- a/Documentation/virtual/kvm/api.txt
+++ b/Documentation/virtual/kvm/api.txt
@@ -835,11 +835,13 @@ struct kvm_clock_data {
Capability: KVM_CAP_VCPU_EVENTS
Extended by: KVM_CAP_INTR_SHADOW
-Architectures: x86
-Type: vm ioctl
+Architectures: x86, arm, arm64
+Type: vcpu ioctl
Parameters: struct kvm_vcpu_event (out)
Returns: 0 on success, -1 on error
+X86:
+
Gets currently pending exceptions, interrupts, and NMIs as well as related
states of the vcpu.
@@ -881,15 +883,64 @@ Only two fields are defined in the flags field:
- KVM_VCPUEVENT_VALID_SMM may be set in the flags field to signal that
smi contains a valid state.
+ARM/ARM64:
+
+If the guest accesses a device that is being emulated by the host kernel in
+such a way that a real device would generate a physical SError, KVM may make
+a virtual SError pending for that VCPU. This system error interrupt remains
+pending until the guest takes the exception by unmasking PSTATE.A.
+
+Running the VCPU may cause it to take a pending SError, or make an access that
+causes an SError to become pending. The event's description is only valid while
+the VPCU is not running.
+
+This API provides a way to read and write the pending 'event' state that is not
+visible to the guest. To save, restore or migrate a VCPU the struct representing
+the state can be read then written using this GET/SET API, along with the other
+guest-visible registers. It is not possible to 'cancel' an SError that has been
+made pending.
+
+A device being emulated in user-space may also wish to generate an SError. To do
+this the events structure can be populated by user-space. The current state
+should be read first, to ensure no existing SError is pending. If an existing
+SError is pending, the architecture's 'Multiple SError interrupts' rules should
+be followed. (2.5.3 of DDI0587.a "ARM Reliability, Availability, and
+Serviceability (RAS) Specification").
+
+SError exceptions always have an ESR value. Some CPUs have the ability to
+specify what the virtual SError's ESR value should be. These systems will
+advertise KVM_CAP_ARM_SET_SERROR_ESR. In this case exception.has_esr will
+always have a non-zero value when read, and the agent making an SError pending
+should specify the ISS field in the lower 24 bits of exception.serror_esr. If
+the system supports KVM_CAP_ARM_SET_SERROR_ESR, but user-space sets the events
+with exception.has_esr as zero, KVM will choose an ESR.
+
+Specifying exception.has_esr on a system that does not support it will return
+-EINVAL. Setting anything other than the lower 24bits of exception.serror_esr
+will return -EINVAL.
+
+struct kvm_vcpu_events {
+ struct {
+ __u8 serror_pending;
+ __u8 serror_has_esr;
+ /* Align it to 8 bytes */
+ __u8 pad[6];
+ __u64 serror_esr;
+ } exception;
+ __u32 reserved[12];
+};
+
4.32 KVM_SET_VCPU_EVENTS
Capability: KVM_CAP_VCPU_EVENTS
Extended by: KVM_CAP_INTR_SHADOW
-Architectures: x86
-Type: vm ioctl
+Architectures: x86, arm, arm64
+Type: vcpu ioctl
Parameters: struct kvm_vcpu_event (in)
Returns: 0 on success, -1 on error
+X86:
+
Set pending exceptions, interrupts, and NMIs as well as related states of the
vcpu.
@@ -910,6 +961,13 @@ shall be written into the VCPU.
KVM_VCPUEVENT_VALID_SMM can only be set if KVM_CAP_X86_SMM is available.
+ARM/ARM64:
+
+Set the pending SError exception state for this VCPU. It is not possible to
+'cancel' an Serror that has been made pending.
+
+See KVM_GET_VCPU_EVENTS for the data structure.
+
4.33 KVM_GET_DEBUGREGS
@@ -4690,3 +4748,17 @@ This capability indicates that KVM supports paravirtualized Hyper-V TLB Flush
hypercalls:
HvFlushVirtualAddressSpace, HvFlushVirtualAddressSpaceEx,
HvFlushVirtualAddressList, HvFlushVirtualAddressListEx.
+
+8.19 KVM_CAP_ARM_SET_SERROR_ESR
+
+Architectures: arm, arm64
+
+This capability indicates that userspace can specify (via the
+KVM_SET_VCPU_EVENTS ioctl) the syndrome value reported to the guest when it
+takes a virtual SError interrupt exception.
+If KVM advertises this capability, userspace can only specify the ISS field for
+the ESR syndrome. Other parts of the ESR, such as the EC are generated by the
+CPU when the exception is taken. If this virtual SError is taken to EL1 using
+AArch64, this value will be reported in the ISS field of ESR_ELx.
+
+See KVM_CAP_VCPU_EVENTS for more details.
diff --git a/Documentation/virtual/kvm/devices/arm-vgic-v3.txt b/Documentation/virtual/kvm/devices/arm-vgic-v3.txt
index 2408ab720ef7..ff290b43c8e5 100644
--- a/Documentation/virtual/kvm/devices/arm-vgic-v3.txt
+++ b/Documentation/virtual/kvm/devices/arm-vgic-v3.txt
@@ -100,6 +100,14 @@ Groups:
Note that distributor fields are not banked, but return the same value
regardless of the mpidr used to access the register.
+ GICD_IIDR.Revision is updated when the KVM implementation is changed in a
+ way directly observable by the guest or userspace. Userspace should read
+ GICD_IIDR from KVM and write back the read value to confirm its expected
+ behavior is aligned with the KVM implementation. Userspace should set
+ GICD_IIDR before setting any other registers to ensure the expected
+ behavior.
+
+
The GICD_STATUSR and GICR_STATUSR registers are architecturally defined such
that a write of a clear bit has no effect, whereas a write with a set bit
clears that value. To allow userspace to freely set the values of these two
diff --git a/Documentation/virtual/kvm/devices/arm-vgic.txt b/Documentation/virtual/kvm/devices/arm-vgic.txt
index b3ce12643553..97b6518148f8 100644
--- a/Documentation/virtual/kvm/devices/arm-vgic.txt
+++ b/Documentation/virtual/kvm/devices/arm-vgic.txt
@@ -49,9 +49,15 @@ Groups:
index is specified with the vcpu_index field. Note that most distributor
fields are not banked, but return the same value regardless of the
vcpu_index used to access the register.
- Limitations:
- - Priorities are not implemented, and registers are RAZ/WI
- - Currently only implemented for KVM_DEV_TYPE_ARM_VGIC_V2.
+
+ GICD_IIDR.Revision is updated when the KVM implementation of an emulated
+ GICv2 is changed in a way directly observable by the guest or userspace.
+ Userspace should read GICD_IIDR from KVM and write back the read value to
+ confirm its expected behavior is aligned with the KVM implementation.
+ Userspace should set GICD_IIDR before setting any other registers (both
+ KVM_DEV_ARM_VGIC_GRP_DIST_REGS and KVM_DEV_ARM_VGIC_GRP_CPU_REGS) to ensure
+ the expected behavior. Unless GICD_IIDR has been set from userspace, writes
+ to the interrupt group registers (GICD_IGROUPR) are ignored.
Errors:
-ENXIO: Getting or setting this register is not yet supported
-EBUSY: One or more VCPUs are running
@@ -94,9 +100,6 @@ Groups:
use the lower 5 bits to communicate with the KVM device and must shift the
value left by 3 places to obtain the actual priority mask level.
- Limitations:
- - Priorities are not implemented, and registers are RAZ/WI
- - Currently only implemented for KVM_DEV_TYPE_ARM_VGIC_V2.
Errors:
-ENXIO: Getting or setting this register is not yet supported
-EBUSY: One or more VCPUs are running
diff --git a/arch/arm/include/asm/kvm_emulate.h b/arch/arm/include/asm/kvm_emulate.h
index fe2fb1ddd771..77121b713bef 100644
--- a/arch/arm/include/asm/kvm_emulate.h
+++ b/arch/arm/include/asm/kvm_emulate.h
@@ -107,9 +107,19 @@ static inline unsigned long *vcpu_hcr(const struct kvm_vcpu *vcpu)
return (unsigned long *)&vcpu->arch.hcr;
}
+static inline void vcpu_clear_wfe_traps(struct kvm_vcpu *vcpu)
+{
+ vcpu->arch.hcr &= ~HCR_TWE;
+}
+
+static inline void vcpu_set_wfe_traps(struct kvm_vcpu *vcpu)
+{
+ vcpu->arch.hcr |= HCR_TWE;
+}
+
static inline bool vcpu_mode_is_32bit(const struct kvm_vcpu *vcpu)
{
- return 1;
+ return true;
}
static inline unsigned long *vcpu_pc(struct kvm_vcpu *vcpu)
diff --git a/arch/arm/include/asm/kvm_host.h b/arch/arm/include/asm/kvm_host.h
index 1f1fe4109b02..79906cecb091 100644
--- a/arch/arm/include/asm/kvm_host.h
+++ b/arch/arm/include/asm/kvm_host.h
@@ -216,6 +216,11 @@ int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
unsigned long kvm_call_hyp(void *hypfn, ...);
void force_vm_exit(const cpumask_t *mask);
+int __kvm_arm_vcpu_get_events(struct kvm_vcpu *vcpu,
+ struct kvm_vcpu_events *events);
+
+int __kvm_arm_vcpu_set_events(struct kvm_vcpu *vcpu,
+ struct kvm_vcpu_events *events);
#define KVM_ARCH_WANT_MMU_NOTIFIER
int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
diff --git a/arch/arm/include/asm/kvm_mmu.h b/arch/arm/include/asm/kvm_mmu.h
index 8553d68b7c8a..265ea9cf7df7 100644
--- a/arch/arm/include/asm/kvm_mmu.h
+++ b/arch/arm/include/asm/kvm_mmu.h
@@ -75,17 +75,9 @@ phys_addr_t kvm_get_idmap_vector(void);
int kvm_mmu_init(void);
void kvm_clear_hyp_idmap(void);
-static inline void kvm_set_pmd(pmd_t *pmd, pmd_t new_pmd)
-{
- *pmd = new_pmd;
- dsb(ishst);
-}
-
-static inline void kvm_set_pte(pte_t *pte, pte_t new_pte)
-{
- *pte = new_pte;
- dsb(ishst);
-}
+#define kvm_mk_pmd(ptep) __pmd(__pa(ptep) | PMD_TYPE_TABLE)
+#define kvm_mk_pud(pmdp) __pud(__pa(pmdp) | PMD_TYPE_TABLE)
+#define kvm_mk_pgd(pudp) ({ BUILD_BUG(); 0; })
static inline pte_t kvm_s2pte_mkwrite(pte_t pte)
{
diff --git a/arch/arm/include/uapi/asm/kvm.h b/arch/arm/include/uapi/asm/kvm.h
index 16e006f708ca..4602464ebdfb 100644
--- a/arch/arm/include/uapi/asm/kvm.h
+++ b/arch/arm/include/uapi/asm/kvm.h
@@ -27,6 +27,7 @@
#define __KVM_HAVE_GUEST_DEBUG
#define __KVM_HAVE_IRQ_LINE
#define __KVM_HAVE_READONLY_MEM
+#define __KVM_HAVE_VCPU_EVENTS
#define KVM_COALESCED_MMIO_PAGE_OFFSET 1
@@ -125,6 +126,18 @@ struct kvm_sync_regs {
struct kvm_arch_memory_slot {
};
+/* for KVM_GET/SET_VCPU_EVENTS */
+struct kvm_vcpu_events {
+ struct {
+ __u8 serror_pending;
+ __u8 serror_has_esr;
+ /* Align it to 8 bytes */
+ __u8 pad[6];
+ __u64 serror_esr;
+ } exception;
+ __u32 reserved[12];
+};
+
/* If you need to interpret the index values, here is the key: */
#define KVM_REG_ARM_COPROC_MASK 0x000000000FFF0000
#define KVM_REG_ARM_COPROC_SHIFT 16
diff --git a/arch/arm/kvm/coproc.c b/arch/arm/kvm/coproc.c
index 3a02e76699a6..450c7a4fbc8a 100644
--- a/arch/arm/kvm/coproc.c
+++ b/arch/arm/kvm/coproc.c
@@ -246,6 +246,7 @@ static bool access_gic_sgi(struct kvm_vcpu *vcpu,
const struct coproc_reg *r)
{
u64 reg;
+ bool g1;
if (!p->is_write)
return read_from_write_only(vcpu, p);
@@ -253,7 +254,25 @@ static bool access_gic_sgi(struct kvm_vcpu *vcpu,
reg = (u64)*vcpu_reg(vcpu, p->Rt2) << 32;
reg |= *vcpu_reg(vcpu, p->Rt1) ;
- vgic_v3_dispatch_sgi(vcpu, reg);
+ /*
+ * In a system where GICD_CTLR.DS=1, a ICC_SGI0R access generates
+ * Group0 SGIs only, while ICC_SGI1R can generate either group,
+ * depending on the SGI configuration. ICC_ASGI1R is effectively
+ * equivalent to ICC_SGI0R, as there is no "alternative" secure
+ * group.
+ */
+ switch (p->Op1) {
+ default: /* Keep GCC quiet */
+ case 0: /* ICC_SGI1R */
+ g1 = true;
+ break;
+ case 1: /* ICC_ASGI1R */
+ case 2: /* ICC_SGI0R */
+ g1 = false;
+ break;
+ }
+
+ vgic_v3_dispatch_sgi(vcpu, reg, g1);
return true;
}
@@ -459,6 +478,10 @@ static const struct coproc_reg cp15_regs[] = {
/* ICC_SGI1R */
{ CRm64(12), Op1( 0), is64, access_gic_sgi},
+ /* ICC_ASGI1R */
+ { CRm64(12), Op1( 1), is64, access_gic_sgi},
+ /* ICC_SGI0R */
+ { CRm64(12), Op1( 2), is64, access_gic_sgi},
/* VBAR: swapped by interrupt.S. */
{ CRn(12), CRm( 0), Op1( 0), Op2( 0), is32,
diff --git a/arch/arm/kvm/guest.c b/arch/arm/kvm/guest.c
index a18f33edc471..2b8de885b2bf 100644
--- a/arch/arm/kvm/guest.c
+++ b/arch/arm/kvm/guest.c
@@ -261,6 +261,29 @@ int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
return -EINVAL;
}
+
+int __kvm_arm_vcpu_get_events(struct kvm_vcpu *vcpu,
+ struct kvm_vcpu_events *events)
+{
+ events->exception.serror_pending = !!(*vcpu_hcr(vcpu) & HCR_VA);
+
+ return 0;
+}
+
+int __kvm_arm_vcpu_set_events(struct kvm_vcpu *vcpu,
+ struct kvm_vcpu_events *events)
+{
+ bool serror_pending = events->exception.serror_pending;
+ bool has_esr = events->exception.serror_has_esr;
+
+ if (serror_pending && has_esr)
+ return -EINVAL;
+ else if (serror_pending)
+ kvm_inject_vabt(vcpu);
+
+ return 0;
+}
+
int __attribute_const__ kvm_target_cpu(void)
{
switch (read_cpuid_part()) {
diff --git a/arch/arm64/include/asm/cpucaps.h b/arch/arm64/include/asm/cpucaps.h
index be3bf3d08916..ae1f70450fb2 100644
--- a/arch/arm64/include/asm/cpucaps.h
+++ b/arch/arm64/include/asm/cpucaps.h
@@ -50,7 +50,8 @@
#define ARM64_HW_DBM 29
#define ARM64_SSBD 30
#define ARM64_MISMATCHED_CACHE_TYPE 31
+#define ARM64_HAS_STAGE2_FWB 32
-#define ARM64_NCAPS 32
+#define ARM64_NCAPS 33
#endif /* __ASM_CPUCAPS_H */
diff --git a/arch/arm64/include/asm/kvm_arm.h b/arch/arm64/include/asm/kvm_arm.h
index 6dd285e979c9..aa45df752a16 100644
--- a/arch/arm64/include/asm/kvm_arm.h
+++ b/arch/arm64/include/asm/kvm_arm.h
@@ -23,6 +23,7 @@
#include <asm/types.h>
/* Hyp Configuration Register (HCR) bits */
+#define HCR_FWB (UL(1) << 46)
#define HCR_TEA (UL(1) << 37)
#define HCR_TERR (UL(1) << 36)
#define HCR_TLOR (UL(1) << 35)
diff --git a/arch/arm64/include/asm/kvm_emulate.h b/arch/arm64/include/asm/kvm_emulate.h
index 0c97e45d1dc3..6106a85ae0be 100644
--- a/arch/arm64/include/asm/kvm_emulate.h
+++ b/arch/arm64/include/asm/kvm_emulate.h
@@ -63,6 +63,8 @@ static inline void vcpu_reset_hcr(struct kvm_vcpu *vcpu)
/* trap error record accesses */
vcpu->arch.hcr_el2 |= HCR_TERR;
}
+ if (cpus_have_const_cap(ARM64_HAS_STAGE2_FWB))
+ vcpu->arch.hcr_el2 |= HCR_FWB;
if (test_bit(KVM_ARM_VCPU_EL1_32BIT, vcpu->arch.features))
vcpu->arch.hcr_el2 &= ~HCR_RW;
@@ -81,6 +83,21 @@ static inline unsigned long *vcpu_hcr(struct kvm_vcpu *vcpu)
return (unsigned long *)&vcpu->arch.hcr_el2;
}
+static inline void vcpu_clear_wfe_traps(struct kvm_vcpu *vcpu)
+{
+ vcpu->arch.hcr_el2 &= ~HCR_TWE;
+}
+
+static inline void vcpu_set_wfe_traps(struct kvm_vcpu *vcpu)
+{
+ vcpu->arch.hcr_el2 |= HCR_TWE;
+}
+
+static inline unsigned long vcpu_get_vsesr(struct kvm_vcpu *vcpu)
+{
+ return vcpu->arch.vsesr_el2;
+}
+
static inline void vcpu_set_vsesr(struct kvm_vcpu *vcpu, u64 vsesr)
{
vcpu->arch.vsesr_el2 = vsesr;
diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index fe8777b12f86..f26055f2306e 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -350,6 +350,11 @@ unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices);
int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
+int __kvm_arm_vcpu_get_events(struct kvm_vcpu *vcpu,
+ struct kvm_vcpu_events *events);
+
+int __kvm_arm_vcpu_set_events(struct kvm_vcpu *vcpu,
+ struct kvm_vcpu_events *events);
#define KVM_ARCH_WANT_MMU_NOTIFIER
int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
@@ -378,16 +383,23 @@ void handle_exit_early(struct kvm_vcpu *vcpu, struct kvm_run *run,
int kvm_perf_init(void);
int kvm_perf_teardown(void);
+void kvm_set_sei_esr(struct kvm_vcpu *vcpu, u64 syndrome);
+
struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, unsigned long mpidr);
-void __kvm_set_tpidr_el2(u64 tpidr_el2);
DECLARE_PER_CPU(kvm_cpu_context_t, kvm_host_cpu_state);
static inline void __cpu_init_hyp_mode(phys_addr_t pgd_ptr,
unsigned long hyp_stack_ptr,
unsigned long vector_ptr)
{
- u64 tpidr_el2;
+ /*
+ * Calculate the raw per-cpu offset without a translation from the
+ * kernel's mapping to the linear mapping, and store it in tpidr_el2
+ * so that we can use adr_l to access per-cpu variables in EL2.
+ */
+ u64 tpidr_el2 = ((u64)this_cpu_ptr(&kvm_host_cpu_state) -
+ (u64)kvm_ksym_ref(kvm_host_cpu_state));
/*
* Call initialization code, and switch to the full blown HYP code.
@@ -396,17 +408,7 @@ static inline void __cpu_init_hyp_mode(phys_addr_t pgd_ptr,
* cpus_have_const_cap() wrapper.
*/
BUG_ON(!static_branch_likely(&arm64_const_caps_ready));
- __kvm_call_hyp((void *)pgd_ptr, hyp_stack_ptr, vector_ptr);
-
- /*
- * Calculate the raw per-cpu offset without a translation from the
- * kernel's mapping to the linear mapping, and store it in tpidr_el2
- * so that we can use adr_l to access per-cpu variables in EL2.
- */
- tpidr_el2 = (u64)this_cpu_ptr(&kvm_host_cpu_state)
- - (u64)kvm_ksym_ref(kvm_host_cpu_state);
-
- kvm_call_hyp(__kvm_set_tpidr_el2, tpidr_el2);
+ __kvm_call_hyp((void *)pgd_ptr, hyp_stack_ptr, vector_ptr, tpidr_el2);
}
static inline bool kvm_arch_check_sve_has_vhe(void)
diff --git a/arch/arm64/include/asm/kvm_mmu.h b/arch/arm64/include/asm/kvm_mmu.h
index fb9a7127bb75..d6fff7de5539 100644
--- a/arch/arm64/include/asm/kvm_mmu.h
+++ b/arch/arm64/include/asm/kvm_mmu.h
@@ -169,8 +169,12 @@ phys_addr_t kvm_get_idmap_vector(void);
int kvm_mmu_init(void);
void kvm_clear_hyp_idmap(void);
-#define kvm_set_pte(ptep, pte) set_pte(ptep, pte)
-#define kvm_set_pmd(pmdp, pmd) set_pmd(pmdp, pmd)
+#define kvm_mk_pmd(ptep) \
+ __pmd(__phys_to_pmd_val(__pa(ptep)) | PMD_TYPE_TABLE)
+#define kvm_mk_pud(pmdp) \
+ __pud(__phys_to_pud_val(__pa(pmdp)) | PMD_TYPE_TABLE)
+#define kvm_mk_pgd(pudp) \
+ __pgd(__phys_to_pgd_val(__pa(pudp)) | PUD_TYPE_TABLE)
static inline pte_t kvm_s2pte_mkwrite(pte_t pte)
{
@@ -267,6 +271,15 @@ static inline void __clean_dcache_guest_page(kvm_pfn_t pfn, unsigned long size)
{
void *va = page_address(pfn_to_page(pfn));
+ /*
+ * With FWB, we ensure that the guest always accesses memory using
+ * cacheable attributes, and we don't have to clean to PoC when
+ * faulting in pages. Furthermore, FWB implies IDC, so cleaning to
+ * PoU is not required either in this case.
+ */
+ if (cpus_have_const_cap(ARM64_HAS_STAGE2_FWB))
+ return;
+
kvm_flush_dcache_to_poc(va, size);
}
@@ -287,20 +300,26 @@ static inline void __invalidate_icache_guest_page(kvm_pfn_t pfn,
static inline void __kvm_flush_dcache_pte(pte_t pte)
{
- struct page *page = pte_page(pte);
- kvm_flush_dcache_to_poc(page_address(page), PAGE_SIZE);
+ if (!cpus_have_const_cap(ARM64_HAS_STAGE2_FWB)) {
+ struct page *page = pte_page(pte);
+ kvm_flush_dcache_to_poc(page_address(page), PAGE_SIZE);
+ }
}
static inline void __kvm_flush_dcache_pmd(pmd_t pmd)
{
- struct page *page = pmd_page(pmd);
- kvm_flush_dcache_to_poc(page_address(page), PMD_SIZE);
+ if (!cpus_have_const_cap(ARM64_HAS_STAGE2_FWB)) {
+ struct page *page = pmd_page(pmd);
+ kvm_flush_dcache_to_poc(page_address(page), PMD_SIZE);
+ }
}
static inline void __kvm_flush_dcache_pud(pud_t pud)
{
- struct page *page = pud_page(pud);
- kvm_flush_dcache_to_poc(page_address(page), PUD_SIZE);
+ if (!cpus_have_const_cap(ARM64_HAS_STAGE2_FWB)) {
+ struct page *page = pud_page(pud);
+ kvm_flush_dcache_to_poc(page_address(page), PUD_SIZE);
+ }
}
#define kvm_virt_to_phys(x) __pa_symbol(x)
diff --git a/arch/arm64/include/asm/memory.h b/arch/arm64/include/asm/memory.h
index 49d99214f43c..b96442960aea 100644
--- a/arch/arm64/include/asm/memory.h
+++ b/arch/arm64/include/asm/memory.h
@@ -155,6 +155,13 @@
#define MT_S2_NORMAL 0xf
#define MT_S2_DEVICE_nGnRE 0x1
+/*
+ * Memory types for Stage-2 translation when ID_AA64MMFR2_EL1.FWB is 0001
+ * Stage-2 enforces Normal-WB and Device-nGnRE
+ */
+#define MT_S2_FWB_NORMAL 6
+#define MT_S2_FWB_DEVICE_nGnRE 1
+
#ifdef CONFIG_ARM64_4K_PAGES
#define IOREMAP_MAX_ORDER (PUD_SHIFT)
#else
diff --git a/arch/arm64/include/asm/pgtable-prot.h b/arch/arm64/include/asm/pgtable-prot.h
index 108ecad7acc5..78b942c1bea4 100644
--- a/arch/arm64/include/asm/pgtable-prot.h
+++ b/arch/arm64/include/asm/pgtable-prot.h
@@ -67,8 +67,28 @@
#define PAGE_HYP_RO __pgprot(_HYP_PAGE_DEFAULT | PTE_HYP | PTE_RDONLY | PTE_HYP_XN)
#define PAGE_HYP_DEVICE __pgprot(PROT_DEVICE_nGnRE | PTE_HYP)
-#define PAGE_S2 __pgprot(_PROT_DEFAULT | PTE_S2_MEMATTR(MT_S2_NORMAL) | PTE_S2_RDONLY | PTE_S2_XN)
-#define PAGE_S2_DEVICE __pgprot(_PROT_DEFAULT | PTE_S2_MEMATTR(MT_S2_DEVICE_nGnRE) | PTE_S2_RDONLY | PTE_S2_XN)
+#define PAGE_S2_MEMATTR(attr) \
+ ({ \
+ u64 __val; \
+ if (cpus_have_const_cap(ARM64_HAS_STAGE2_FWB)) \
+ __val = PTE_S2_MEMATTR(MT_S2_FWB_ ## attr); \
+ else \
+ __val = PTE_S2_MEMATTR(MT_S2_ ## attr); \
+ __val; \
+ })
+
+#define PAGE_S2_XN \
+ ({ \
+ u64 __val; \
+ if (cpus_have_const_cap(ARM64_HAS_CACHE_DIC)) \
+ __val = 0; \
+ else \
+ __val = PTE_S2_XN; \
+ __val; \
+ })
+
+#define PAGE_S2 __pgprot(_PROT_DEFAULT | PAGE_S2_MEMATTR(NORMAL) | PTE_S2_RDONLY | PAGE_S2_XN)
+#define PAGE_S2_DEVICE __pgprot(_PROT_DEFAULT | PAGE_S2_MEMATTR(DEVICE_nGnRE) | PTE_S2_RDONLY | PAGE_S2_XN)
#define PAGE_NONE __pgprot(((_PAGE_DEFAULT) & ~PTE_VALID) | PTE_PROT_NONE | PTE_RDONLY | PTE_NG | PTE_PXN | PTE_UXN)
#define PAGE_SHARED __pgprot(_PAGE_DEFAULT | PTE_USER | PTE_NG | PTE_PXN | PTE_UXN | PTE_WRITE)
diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h
index e205ec8489e9..c1470931b897 100644
--- a/arch/arm64/include/asm/sysreg.h
+++ b/arch/arm64/include/asm/sysreg.h
@@ -314,6 +314,8 @@
#define SYS_ICC_DIR_EL1 sys_reg(3, 0, 12, 11, 1)
#define SYS_ICC_RPR_EL1 sys_reg(3, 0, 12, 11, 3)
#define SYS_ICC_SGI1R_EL1 sys_reg(3, 0, 12, 11, 5)
+#define SYS_ICC_ASGI1R_EL1 sys_reg(3, 0, 12, 11, 6)
+#define SYS_ICC_SGI0R_EL1 sys_reg(3, 0, 12, 11, 7)
#define SYS_ICC_IAR1_EL1 sys_reg(3, 0, 12, 12, 0)
#define SYS_ICC_EOIR1_EL1 sys_reg(3, 0, 12, 12, 1)
#define SYS_ICC_HPPIR1_EL1 sys_reg(3, 0, 12, 12, 2)
@@ -579,6 +581,7 @@
#define ID_AA64MMFR1_VMIDBITS_16 2
/* id_aa64mmfr2 */
+#define ID_AA64MMFR2_FWB_SHIFT 40
#define ID_AA64MMFR2_AT_SHIFT 32
#define ID_AA64MMFR2_LVA_SHIFT 16
#define ID_AA64MMFR2_IESB_SHIFT 12
diff --git a/arch/arm64/include/uapi/asm/kvm.h b/arch/arm64/include/uapi/asm/kvm.h
index 4e76630dd655..97c3478ee6e7 100644
--- a/arch/arm64/include/uapi/asm/kvm.h
+++ b/arch/arm64/include/uapi/asm/kvm.h
@@ -39,6 +39,7 @@
#define __KVM_HAVE_GUEST_DEBUG
#define __KVM_HAVE_IRQ_LINE
#define __KVM_HAVE_READONLY_MEM
+#define __KVM_HAVE_VCPU_EVENTS
#define KVM_COALESCED_MMIO_PAGE_OFFSET 1
@@ -154,6 +155,18 @@ struct kvm_sync_regs {
struct kvm_arch_memory_slot {
};
+/* for KVM_GET/SET_VCPU_EVENTS */
+struct kvm_vcpu_events {
+ struct {
+ __u8 serror_pending;
+ __u8 serror_has_esr;
+ /* Align it to 8 bytes */
+ __u8 pad[6];
+ __u64 serror_esr;
+ } exception;
+ __u32 reserved[12];
+};
+
/* If you need to interpret the index values, here is the key: */
#define KVM_REG_ARM_COPROC_MASK 0x000000000FFF0000
#define KVM_REG_ARM_COPROC_SHIFT 16
diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
index 611e8921c3d4..e238b7932096 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c
@@ -192,6 +192,7 @@ static const struct arm64_ftr_bits ftr_id_aa64mmfr1[] = {
};
static const struct arm64_ftr_bits ftr_id_aa64mmfr2[] = {
+ ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64MMFR2_FWB_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64MMFR2_AT_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64MMFR2_LVA_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_HIDDEN, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64MMFR2_IESB_SHIFT, 4, 0),
@@ -1026,6 +1027,14 @@ static void cpu_copy_el2regs(const struct arm64_cpu_capabilities *__unused)
}
#endif
+static void cpu_has_fwb(const struct arm64_cpu_capabilities *__unused)
+{
+ u64 val = read_sysreg_s(SYS_CLIDR_EL1);
+
+ /* Check that CLIDR_EL1.LOU{U,IS} are both 0 */
+ WARN_ON(val & (7 << 27 | 7 << 21));
+}
+
static const struct arm64_cpu_capabilities arm64_features[] = {
{
.desc = "GIC system register CPU interface",
@@ -1182,6 +1191,17 @@ static const struct arm64_cpu_capabilities arm64_features[] = {
.type = ARM64_CPUCAP_SYSTEM_FEATURE,
.matches = has_cache_dic,
},
+ {
+ .desc = "Stage-2 Force Write-Back",
+ .type = ARM64_CPUCAP_SYSTEM_FEATURE,
+ .capability = ARM64_HAS_STAGE2_FWB,
+ .sys_reg = SYS_ID_AA64MMFR2_EL1,
+ .sign = FTR_UNSIGNED,
+ .field_pos = ID_AA64MMFR2_FWB_SHIFT,
+ .min_field_value = 1,
+ .matches = has_cpuid_feature,
+ .cpu_enable = cpu_has_fwb,
+ },
#ifdef CONFIG_ARM64_HW_AFDBM
{
/*
diff --git a/arch/arm64/kvm/guest.c b/arch/arm64/kvm/guest.c
index cdd4d9d6d575..07256b08226c 100644
--- a/arch/arm64/kvm/guest.c
+++ b/arch/arm64/kvm/guest.c
@@ -289,6 +289,39 @@ int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
return -EINVAL;
}
+int __kvm_arm_vcpu_get_events(struct kvm_vcpu *vcpu,
+ struct kvm_vcpu_events *events)
+{
+ events->exception.serror_pending = !!(vcpu->arch.hcr_el2 & HCR_VSE);
+ events->exception.serror_has_esr = cpus_have_const_cap(ARM64_HAS_RAS_EXTN);
+
+ if (events->exception.serror_pending && events->exception.serror_has_esr)
+ events->exception.serror_esr = vcpu_get_vsesr(vcpu);
+
+ return 0;
+}
+
+int __kvm_arm_vcpu_set_events(struct kvm_vcpu *vcpu,
+ struct kvm_vcpu_events *events)
+{
+ bool serror_pending = events->exception.serror_pending;
+ bool has_esr = events->exception.serror_has_esr;
+
+ if (serror_pending && has_esr) {
+ if (!cpus_have_const_cap(ARM64_HAS_RAS_EXTN))
+ return -EINVAL;
+
+ if (!((events->exception.serror_esr) & ~ESR_ELx_ISS_MASK))
+ kvm_set_sei_esr(vcpu, events->exception.serror_esr);
+ else
+ return -EINVAL;
+ } else if (serror_pending) {
+ kvm_inject_vabt(vcpu);
+ }
+
+ return 0;
+}
+
int __attribute_const__ kvm_target_cpu(void)
{
unsigned long implementor = read_cpuid_implementor();
diff --git a/arch/arm64/kvm/hyp-init.S b/arch/arm64/kvm/hyp-init.S
index 6fd91b31a131..ea9225160786 100644
--- a/arch/arm64/kvm/hyp-init.S
+++ b/arch/arm64/kvm/hyp-init.S
@@ -57,6 +57,7 @@ __invalid:
* x0: HYP pgd
* x1: HYP stack
* x2: HYP vectors
+ * x3: per-CPU offset
*/
__do_hyp_init:
/* Check for a stub HVC call */
@@ -119,9 +120,8 @@ CPU_BE( orr x4, x4, #SCTLR_ELx_EE)
mov sp, x1
msr vbar_el2, x2
- /* copy tpidr_el1 into tpidr_el2 for use by HYP */
- mrs x1, tpidr_el1
- msr tpidr_el2, x1
+ /* Set tpidr_el2 for use by HYP */
+ msr tpidr_el2, x3
/* Hello, World! */
eret
diff --git a/arch/arm64/kvm/hyp/sysreg-sr.c b/arch/arm64/kvm/hyp/sysreg-sr.c
index 35bc16832efe..9ce223944983 100644
--- a/arch/arm64/kvm/hyp/sysreg-sr.c
+++ b/arch/arm64/kvm/hyp/sysreg-sr.c
@@ -288,8 +288,3 @@ void kvm_vcpu_put_sysregs(struct kvm_vcpu *vcpu)
vcpu->arch.sysregs_loaded_on_cpu = false;
}
-
-void __hyp_text __kvm_set_tpidr_el2(u64 tpidr_el2)
-{
- asm("msr tpidr_el2, %0": : "r" (tpidr_el2));
-}
diff --git a/arch/arm64/kvm/inject_fault.c b/arch/arm64/kvm/inject_fault.c
index d8e71659ba7e..a55e91dfcf8f 100644
--- a/arch/arm64/kvm/inject_fault.c
+++ b/arch/arm64/kvm/inject_fault.c
@@ -164,9 +164,9 @@ void kvm_inject_undefined(struct kvm_vcpu *vcpu)
inject_undef64(vcpu);
}
-static void pend_guest_serror(struct kvm_vcpu *vcpu, u64 esr)
+void kvm_set_sei_esr(struct kvm_vcpu *vcpu, u64 esr)
{
- vcpu_set_vsesr(vcpu, esr);
+ vcpu_set_vsesr(vcpu, esr & ESR_ELx_ISS_MASK);
*vcpu_hcr(vcpu) |= HCR_VSE;
}
@@ -184,5 +184,5 @@ static void pend_guest_serror(struct kvm_vcpu *vcpu, u64 esr)
*/
void kvm_inject_vabt(struct kvm_vcpu *vcpu)
{
- pend_guest_serror(vcpu, ESR_ELx_ISV);
+ kvm_set_sei_esr(vcpu, ESR_ELx_ISV);
}
diff --git a/arch/arm64/kvm/reset.c b/arch/arm64/kvm/reset.c
index 4e4aedaf7ab7..e37c78bbe1ca 100644
--- a/arch/arm64/kvm/reset.c
+++ b/arch/arm64/kvm/reset.c
@@ -77,8 +77,12 @@ int kvm_arch_dev_ioctl_check_extension(struct kvm *kvm, long ext)
case KVM_CAP_ARM_PMU_V3:
r = kvm_arm_support_pmu_v3();
break;
+ case KVM_CAP_ARM_INJECT_SERROR_ESR:
+ r = cpus_have_const_cap(ARM64_HAS_RAS_EXTN);
+ break;
case KVM_CAP_SET_GUEST_DEBUG:
case KVM_CAP_VCPU_ATTRIBUTES:
+ case KVM_CAP_VCPU_EVENTS:
r = 1;
break;
default:
diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
index a4363735d3f8..22fbbdbece3c 100644
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c
@@ -194,7 +194,16 @@ static bool access_dcsw(struct kvm_vcpu *vcpu,
if (!p->is_write)
return read_from_write_only(vcpu, p, r);
- kvm_set_way_flush(vcpu);
+ /*
+ * Only track S/W ops if we don't have FWB. It still indicates
+ * that the guest is a bit broken (S/W operations should only
+ * be done by firmware, knowing that there is only a single
+ * CPU left in the system, and certainly not from non-secure
+ * software).
+ */
+ if (!cpus_have_const_cap(ARM64_HAS_STAGE2_FWB))
+ kvm_set_way_flush(vcpu);
+
return true;
}
@@ -243,10 +252,43 @@ static bool access_gic_sgi(struct kvm_vcpu *vcpu,
struct sys_reg_params *p,
const struct sys_reg_desc *r)
{
+ bool g1;
+
if (!p->is_write)
return read_from_write_only(vcpu, p, r);
- vgic_v3_dispatch_sgi(vcpu, p->regval);
+ /*
+ * In a system where GICD_CTLR.DS=1, a ICC_SGI0R_EL1 access generates
+ * Group0 SGIs only, while ICC_SGI1R_EL1 can generate either group,
+ * depending on the SGI configuration. ICC_ASGI1R_EL1 is effectively
+ * equivalent to ICC_SGI0R_EL1, as there is no "alternative" secure
+ * group.
+ */
+ if (p->is_aarch32) {
+ switch (p->Op1) {
+ default: /* Keep GCC quiet */
+ case 0: /* ICC_SGI1R */
+ g1 = true;
+ break;
+ case 1: /* ICC_ASGI1R */
+ case 2: /* ICC_SGI0R */
+ g1 = false;
+ break;
+ }
+ } else {
+ switch (p->Op2) {
+ default: /* Keep GCC quiet */
+ case 5: /* ICC_SGI1R_EL1 */
+ g1 = true;
+ break;
+ case 6: /* ICC_ASGI1R_EL1 */
+ case 7: /* ICC_SGI0R_EL1 */
+ g1 = false;
+ break;
+ }
+ }
+
+ vgic_v3_dispatch_sgi(vcpu, p->regval, g1);
return true;
}
@@ -1303,6 +1345,8 @@ static const struct sys_reg_desc sys_reg_descs[] = {
{ SYS_DESC(SYS_ICC_DIR_EL1), read_from_write_only },
{ SYS_DESC(SYS_ICC_RPR_EL1), write_to_read_only },
{ SYS_DESC(SYS_ICC_SGI1R_EL1), access_gic_sgi },
+ { SYS_DESC(SYS_ICC_ASGI1R_EL1), access_gic_sgi },
+ { SYS_DESC(SYS_ICC_SGI0R_EL1), access_gic_sgi },
{ SYS_DESC(SYS_ICC_IAR1_EL1), write_to_read_only },
{ SYS_DESC(SYS_ICC_EOIR1_EL1), read_from_write_only },
{ SYS_DESC(SYS_ICC_HPPIR1_EL1), write_to_read_only },
@@ -1613,8 +1657,6 @@ static const struct sys_reg_desc cp14_64_regs[] = {
* register).
*/
static const struct sys_reg_desc cp15_regs[] = {
- { Op1( 0), CRn( 0), CRm(12), Op2( 0), access_gic_sgi },
-
{ Op1( 0), CRn( 1), CRm( 0), Op2( 0), access_vm_reg, NULL, c1_SCTLR },
{ Op1( 0), CRn( 2), CRm( 0), Op2( 0), access_vm_reg, NULL, c2_TTBR0 },
{ Op1( 0), CRn( 2), CRm( 0), Op2( 1), access_vm_reg, NULL, c2_TTBR1 },
@@ -1737,8 +1779,10 @@ static const struct sys_reg_desc cp15_regs[] = {
static const struct sys_reg_desc cp15_64_regs[] = {
{ Op1( 0), CRn( 0), CRm( 2), Op2( 0), access_vm_reg, NULL, c2_TTBR0 },
{ Op1( 0), CRn( 0), CRm( 9), Op2( 0), access_pmu_evcntr },
- { Op1( 0), CRn( 0), CRm(12), Op2( 0), access_gic_sgi },
+ { Op1( 0), CRn( 0), CRm(12), Op2( 0), access_gic_sgi }, /* ICC_SGI1R */
{ Op1( 1), CRn( 0), CRm( 2), Op2( 0), access_vm_reg, NULL, c2_TTBR1 },
+ { Op1( 1), CRn( 0), CRm(12), Op2( 0), access_gic_sgi }, /* ICC_ASGI1R */
+ { Op1( 2), CRn( 0), CRm(12), Op2( 0), access_gic_sgi }, /* ICC_SGI0R */
{ Op1( 2), CRn( 0), CRm(14), Op2( 0), access_cntp_cval },
};
diff --git a/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h
index cfdd2484cc42..4f31f96bbfab 100644
--- a/include/kvm/arm_vgic.h
+++ b/include/kvm/arm_vgic.h
@@ -133,6 +133,7 @@ struct vgic_irq {
u8 source; /* GICv2 SGIs only */
u8 active_source; /* GICv2 SGIs only */
u8 priority;
+ u8 group; /* 0 == group 0, 1 == group 1 */
enum vgic_irq_config config; /* Level or edge */
/*
@@ -217,6 +218,12 @@ struct vgic_dist {
/* vGIC model the kernel emulates for the guest (GICv2 or GICv3) */
u32 vgic_model;
+ /* Implementation revision as reported in the GICD_IIDR */
+ u32 implementation_rev;
+
+ /* Userspace can write to GICv2 IGROUPR */
+ bool v2_groups_user_writable;
+
/* Do injected MSIs require an additional device ID? */
bool msis_require_devid;
@@ -366,7 +373,7 @@ void kvm_vgic_sync_hwstate(struct kvm_vcpu *vcpu);
void kvm_vgic_flush_hwstate(struct kvm_vcpu *vcpu);
void kvm_vgic_reset_mapped_irq(struct kvm_vcpu *vcpu, u32 vintid);
-void vgic_v3_dispatch_sgi(struct kvm_vcpu *vcpu, u64 reg);
+void vgic_v3_dispatch_sgi(struct kvm_vcpu *vcpu, u64 reg, bool allow_group1);
/**
* kvm_vgic_get_max_vcpus - Get the maximum number of VCPUs allowed by HW
diff --git a/include/linux/irqchip/arm-gic-v3.h b/include/linux/irqchip/arm-gic-v3.h
index 9d2ea3e907d0..8bdbb5f29494 100644
--- a/include/linux/irqchip/arm-gic-v3.h
+++ b/include/linux/irqchip/arm-gic-v3.h
@@ -61,6 +61,16 @@
#define GICD_CTLR_ENABLE_G1A (1U << 1)
#define GICD_CTLR_ENABLE_G1 (1U << 0)
+#define GICD_IIDR_IMPLEMENTER_SHIFT 0
+#define GICD_IIDR_IMPLEMENTER_MASK (0xfff << GICD_IIDR_IMPLEMENTER_SHIFT)
+#define GICD_IIDR_REVISION_SHIFT 12
+#define GICD_IIDR_REVISION_MASK (0xf << GICD_IIDR_REVISION_SHIFT)
+#define GICD_IIDR_VARIANT_SHIFT 16
+#define GICD_IIDR_VARIANT_MASK (0xf << GICD_IIDR_VARIANT_SHIFT)
+#define GICD_IIDR_PRODUCT_ID_SHIFT 24
+#define GICD_IIDR_PRODUCT_ID_MASK (0xff << GICD_IIDR_PRODUCT_ID_SHIFT)
+
+
/*
* In systems with a single security state (what we emulate in KVM)
* the meaning of the interrupt group enable bits is slightly different
diff --git a/include/linux/irqchip/arm-gic.h b/include/linux/irqchip/arm-gic.h
index 68d8b1f73682..6c4aaf04046c 100644
--- a/include/linux/irqchip/arm-gic.h
+++ b/include/linux/irqchip/arm-gic.h
@@ -71,6 +71,16 @@
(GICD_INT_DEF_PRI << 8) |\
GICD_INT_DEF_PRI)
+#define GICD_IIDR_IMPLEMENTER_SHIFT 0
+#define GICD_IIDR_IMPLEMENTER_MASK (0xfff << GICD_IIDR_IMPLEMENTER_SHIFT)
+#define GICD_IIDR_REVISION_SHIFT 12
+#define GICD_IIDR_REVISION_MASK (0xf << GICD_IIDR_REVISION_SHIFT)
+#define GICD_IIDR_VARIANT_SHIFT 16
+#define GICD_IIDR_VARIANT_MASK (0xf << GICD_IIDR_VARIANT_SHIFT)
+#define GICD_IIDR_PRODUCT_ID_SHIFT 24
+#define GICD_IIDR_PRODUCT_ID_MASK (0xff << GICD_IIDR_PRODUCT_ID_SHIFT)
+
+
#define GICH_HCR 0x0
#define GICH_VTR 0x4
#define GICH_VMCR 0x8
@@ -94,6 +104,7 @@
#define GICH_LR_PENDING_BIT (1 << 28)
#define GICH_LR_ACTIVE_BIT (1 << 29)
#define GICH_LR_EOI (1 << 19)
+#define GICH_LR_GROUP1 (1 << 30)
#define GICH_LR_HW (1 << 31)
#define GICH_VMCR_ENABLE_GRP0_SHIFT 0
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index 3cf632839337..07548de5c988 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -951,6 +951,7 @@ struct kvm_ppc_resize_hpt {
#define KVM_CAP_HYPERV_TLBFLUSH 155
#define KVM_CAP_S390_HPAGE_1M 156
#define KVM_CAP_NESTED_STATE 157
+#define KVM_CAP_ARM_INJECT_SERROR_ESR 158
#ifdef KVM_CAP_IRQ_ROUTING
diff --git a/virt/kvm/arm/arch_timer.c b/virt/kvm/arm/arch_timer.c
index bd3d57f40f1b..17cecc96f735 100644
--- a/virt/kvm/arm/arch_timer.c
+++ b/virt/kvm/arm/arch_timer.c
@@ -295,9 +295,9 @@ static void phys_timer_emulate(struct kvm_vcpu *vcpu)
struct arch_timer_context *ptimer = vcpu_ptimer(vcpu);
/*
- * If the timer can fire now we have just raised the IRQ line and we
- * don't need to have a soft timer scheduled for the future. If the
- * timer cannot fire at all, then we also don't need a soft timer.
+ * If the timer can fire now, we don't need to have a soft timer
+ * scheduled for the future. If the timer cannot fire at all,
+ * then we also don't need a soft timer.
*/
if (kvm_timer_should_fire(ptimer) || !kvm_timer_irq_can_fire(ptimer)) {
soft_timer_cancel(&timer->phys_timer, NULL);
@@ -332,10 +332,10 @@ static void kvm_timer_update_state(struct kvm_vcpu *vcpu)
level = kvm_timer_should_fire(vtimer);
kvm_timer_update_irq(vcpu, level, vtimer);
+ phys_timer_emulate(vcpu);
+
if (kvm_timer_should_fire(ptimer) != ptimer->irq.level)
kvm_timer_update_irq(vcpu, !ptimer->irq.level, ptimer);
-
- phys_timer_emulate(vcpu);
}
static void vtimer_save_state(struct kvm_vcpu *vcpu)
@@ -487,6 +487,7 @@ void kvm_timer_vcpu_load(struct kvm_vcpu *vcpu)
{
struct arch_timer_cpu *timer = &vcpu->arch.timer_cpu;
struct arch_timer_context *vtimer = vcpu_vtimer(vcpu);
+ struct arch_timer_context *ptimer = vcpu_ptimer(vcpu);
if (unlikely(!timer->enabled))
return;
@@ -502,6 +503,10 @@ void kvm_timer_vcpu_load(struct kvm_vcpu *vcpu)
/* Set the background timer for the physical timer emulation. */
phys_timer_emulate(vcpu);
+
+ /* If the timer fired while we weren't running, inject it now */
+ if (kvm_timer_should_fire(ptimer) != ptimer->irq.level)
+ kvm_timer_update_irq(vcpu, !ptimer->irq.level, ptimer);
}
bool kvm_timer_should_notify_user(struct kvm_vcpu *vcpu)
diff --git a/virt/kvm/arm/arm.c b/virt/kvm/arm/arm.c
index 108250e4d376..c92053bc3f96 100644
--- a/virt/kvm/arm/arm.c
+++ b/virt/kvm/arm/arm.c
@@ -30,6 +30,7 @@
#include <linux/kvm.h>
#include <linux/kvm_irqfd.h>
#include <linux/irqbypass.h>
+#include <linux/sched/stat.h>
#include <trace/events/kvm.h>
#include <kvm/arm_pmu.h>
#include <kvm/arm_psci.h>
@@ -380,6 +381,11 @@ void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
kvm_timer_vcpu_load(vcpu);
kvm_vcpu_load_sysregs(vcpu);
kvm_arch_vcpu_load_fp(vcpu);
+
+ if (single_task_running())
+ vcpu_clear_wfe_traps(vcpu);
+ else
+ vcpu_set_wfe_traps(vcpu);
}
void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
@@ -1044,6 +1050,32 @@ static int kvm_arm_vcpu_has_attr(struct kvm_vcpu *vcpu,
return ret;
}
+static int kvm_arm_vcpu_get_events(struct kvm_vcpu *vcpu,
+ struct kvm_vcpu_events *events)
+{
+ memset(events, 0, sizeof(*events));
+
+ return __kvm_arm_vcpu_get_events(vcpu, events);
+}
+
+static int kvm_arm_vcpu_set_events(struct kvm_vcpu *vcpu,
+ struct kvm_vcpu_events *events)
+{
+ int i;
+
+ /* check whether the reserved field is zero */
+ for (i = 0; i < ARRAY_SIZE(events->reserved); i++)
+ if (events->reserved[i])
+ return -EINVAL;
+
+ /* check whether the pad field is zero */
+ for (i = 0; i < ARRAY_SIZE(events->exception.pad); i++)
+ if (events->exception.pad[i])
+ return -EINVAL;
+
+ return __kvm_arm_vcpu_set_events(vcpu, events);
+}
+
long kvm_arch_vcpu_ioctl(struct file *filp,
unsigned int ioctl, unsigned long arg)
{
@@ -1124,6 +1156,25 @@ long kvm_arch_vcpu_ioctl(struct file *filp,
r = kvm_arm_vcpu_has_attr(vcpu, &attr);
break;
}
+ case KVM_GET_VCPU_EVENTS: {
+ struct kvm_vcpu_events events;
+
+ if (kvm_arm_vcpu_get_events(vcpu, &events))
+ return -EINVAL;
+
+ if (copy_to_user(argp, &events, sizeof(events)))
+ return -EFAULT;
+
+ return 0;
+ }
+ case KVM_SET_VCPU_EVENTS: {
+ struct kvm_vcpu_events events;
+
+ if (copy_from_user(&events, argp, sizeof(events)))
+ return -EFAULT;
+
+ return kvm_arm_vcpu_set_events(vcpu, &events);
+ }
default:
r = -EINVAL;
}
diff --git a/virt/kvm/arm/mmu.c b/virt/kvm/arm/mmu.c
index 1d90d79706bd..91aaf73b00df 100644
--- a/virt/kvm/arm/mmu.c
+++ b/virt/kvm/arm/mmu.c
@@ -177,6 +177,35 @@ static void clear_stage2_pmd_entry(struct kvm *kvm, pmd_t *pmd, phys_addr_t addr
put_page(virt_to_page(pmd));
}
+static inline void kvm_set_pte(pte_t *ptep, pte_t new_pte)
+{
+ WRITE_ONCE(*ptep, new_pte);
+ dsb(ishst);
+}
+
+static inline void kvm_set_pmd(pmd_t *pmdp, pmd_t new_pmd)
+{
+ WRITE_ONCE(*pmdp, new_pmd);
+ dsb(ishst);
+}
+
+static inline void kvm_pmd_populate(pmd_t *pmdp, pte_t *ptep)
+{
+ kvm_set_pmd(pmdp, kvm_mk_pmd(ptep));
+}
+
+static inline void kvm_pud_populate(pud_t *pudp, pmd_t *pmdp)
+{
+ WRITE_ONCE(*pudp, kvm_mk_pud(pmdp));
+ dsb(ishst);
+}
+
+static inline void kvm_pgd_populate(pgd_t *pgdp, pud_t *pudp)
+{
+ WRITE_ONCE(*pgdp, kvm_mk_pgd(pudp));
+ dsb(ishst);
+}
+
/*
* Unmapping vs dcache management:
*
@@ -196,6 +225,10 @@ static void clear_stage2_pmd_entry(struct kvm *kvm, pmd_t *pmd, phys_addr_t addr
* This is why right after unmapping a page/section and invalidating
* the corresponding TLBs, we call kvm_flush_dcache_p*() to make sure
* the IO subsystem will never hit in the cache.
+ *
+ * This is all avoided on systems that have ARM64_HAS_STAGE2_FWB, as
+ * we then fully enforce cacheability of RAM, no matter what the guest
+ * does.
*/
static void unmap_stage2_ptes(struct kvm *kvm, pmd_t *pmd,
phys_addr_t addr, phys_addr_t end)
@@ -576,7 +609,6 @@ static void create_hyp_pte_mappings(pmd_t *pmd, unsigned long start,
pte = pte_offset_kernel(pmd, addr);
kvm_set_pte(pte, pfn_pte(pfn, prot));
get_page(virt_to_page(pte));
- kvm_flush_dcache_to_poc(pte, sizeof(*pte));
pfn++;
} while (addr += PAGE_SIZE, addr != end);
}
@@ -601,9 +633,8 @@ static int create_hyp_pmd_mappings(pud_t *pud, unsigned long start,
kvm_err("Cannot allocate Hyp pte\n");
return -ENOMEM;
}
- pmd_populate_kernel(NULL, pmd, pte);
+ kvm_pmd_populate(pmd, pte);
get_page(virt_to_page(pmd));
- kvm_flush_dcache_to_poc(pmd, sizeof(*pmd));
}
next = pmd_addr_end(addr, end);
@@ -634,9 +665,8 @@ static int create_hyp_pud_mappings(pgd_t *pgd, unsigned long start,
kvm_err("Cannot allocate Hyp pmd\n");
return -ENOMEM;
}
- pud_populate(NULL, pud, pmd);
+ kvm_pud_populate(pud, pmd);
get_page(virt_to_page(pud));
- kvm_flush_dcache_to_poc(pud, sizeof(*pud));
}
next = pud_addr_end(addr, end);
@@ -671,9 +701,8 @@ static int __create_hyp_mappings(pgd_t *pgdp, unsigned long ptrs_per_pgd,
err = -ENOMEM;
goto out;
}
- pgd_populate(NULL, pgd, pud);
+ kvm_pgd_populate(pgd, pud);
get_page(virt_to_page(pgd));
- kvm_flush_dcache_to_poc(pgd, sizeof(*pgd));
}
next = pgd_addr_end(addr, end);
@@ -1015,19 +1044,35 @@ static int stage2_set_pmd_huge(struct kvm *kvm, struct kvm_mmu_memory_cache
pmd = stage2_get_pmd(kvm, cache, addr);
VM_BUG_ON(!pmd);
- /*
- * Mapping in huge pages should only happen through a fault. If a
- * page is merged into a transparent huge page, the individual
- * subpages of that huge page should be unmapped through MMU
- * notifiers before we get here.
- *
- * Merging of CompoundPages is not supported; they should become
- * splitting first, unmapped, merged, and mapped back in on-demand.
- */
- VM_BUG_ON(pmd_present(*pmd) && pmd_pfn(*pmd) != pmd_pfn(*new_pmd));
-
old_pmd = *pmd;
if (pmd_present(old_pmd)) {
+ /*
+ * Multiple vcpus faulting on the same PMD entry, can
+ * lead to them sequentially updating the PMD with the
+ * same value. Following the break-before-make
+ * (pmd_clear() followed by tlb_flush()) process can
+ * hinder forward progress due to refaults generated
+ * on missing translations.
+ *
+ * Skip updating the page table if the entry is
+ * unchanged.
+ */
+ if (pmd_val(old_pmd) == pmd_val(*new_pmd))
+ return 0;
+
+ /*
+ * Mapping in huge pages should only happen through a
+ * fault. If a page is merged into a transparent huge
+ * page, the individual subpages of that huge page
+ * should be unmapped through MMU notifiers before we
+ * get here.
+ *
+ * Merging of CompoundPages is not supported; they
+ * should become splitting first, unmapped, merged,
+ * and mapped back in on-demand.
+ */
+ VM_BUG_ON(pmd_pfn(old_pmd) != pmd_pfn(*new_pmd));
+
pmd_clear(pmd);
kvm_tlb_flush_vmid_ipa(kvm, addr);
} else {
@@ -1090,7 +1135,7 @@ static int stage2_set_pte(struct kvm *kvm, struct kvm_mmu_memory_cache *cache,
if (!cache)
return 0; /* ignore calls from kvm_set_spte_hva */
pte = mmu_memory_cache_alloc(cache);
- pmd_populate_kernel(NULL, pmd, pte);
+ kvm_pmd_populate(pmd, pte);
get_page(virt_to_page(pmd));
}
@@ -1102,6 +1147,10 @@ static int stage2_set_pte(struct kvm *kvm, struct kvm_mmu_memory_cache *cache,
/* Create 2nd stage page table mapping - Level 3 */
old_pte = *pte;
if (pte_present(old_pte)) {
+ /* Skip page table update if there is no change */
+ if (pte_val(old_pte) == pte_val(*new_pte))
+ return 0;
+
kvm_set_pte(pte, __pte(0));
kvm_tlb_flush_vmid_ipa(kvm, addr);
} else {
diff --git a/virt/kvm/arm/vgic/vgic-debug.c b/virt/kvm/arm/vgic/vgic-debug.c
index c589d4c2b478..07aa900bac56 100644
--- a/virt/kvm/arm/vgic/vgic-debug.c
+++ b/virt/kvm/arm/vgic/vgic-debug.c
@@ -36,9 +36,12 @@
struct vgic_state_iter {
int nr_cpus;
int nr_spis;
+ int nr_lpis;
int dist_id;
int vcpu_id;
int intid;
+ int lpi_idx;
+ u32 *lpi_array;
};
static void iter_next(struct vgic_state_iter *iter)
@@ -52,6 +55,12 @@ static void iter_next(struct vgic_state_iter *iter)
if (iter->intid == VGIC_NR_PRIVATE_IRQS &&
++iter->vcpu_id < iter->nr_cpus)
iter->intid = 0;
+
+ if (iter->intid >= (iter->nr_spis + VGIC_NR_PRIVATE_IRQS)) {
+ if (iter->lpi_idx < iter->nr_lpis)
+ iter->intid = iter->lpi_array[iter->lpi_idx];
+ iter->lpi_idx++;
+ }
}
static void iter_init(struct kvm *kvm, struct vgic_state_iter *iter,
@@ -63,6 +72,11 @@ static void iter_init(struct kvm *kvm, struct vgic_state_iter *iter,
iter->nr_cpus = nr_cpus;
iter->nr_spis = kvm->arch.vgic.nr_spis;
+ if (kvm->arch.vgic.vgic_model == KVM_DEV_TYPE_ARM_VGIC_V3) {
+ iter->nr_lpis = vgic_copy_lpi_list(kvm, NULL, &iter->lpi_array);
+ if (iter->nr_lpis < 0)
+ iter->nr_lpis = 0;
+ }
/* Fast forward to the right position if needed */
while (pos--)
@@ -73,7 +87,8 @@ static bool end_of_vgic(struct vgic_state_iter *iter)
{
return iter->dist_id > 0 &&
iter->vcpu_id == iter->nr_cpus &&
- (iter->intid - VGIC_NR_PRIVATE_IRQS) == iter->nr_spis;
+ iter->intid >= (iter->nr_spis + VGIC_NR_PRIVATE_IRQS) &&
+ iter->lpi_idx > iter->nr_lpis;
}
static void *vgic_debug_start(struct seq_file *s, loff_t *pos)
@@ -130,6 +145,7 @@ static void vgic_debug_stop(struct seq_file *s, void *v)
mutex_lock(&kvm->lock);
iter = kvm->arch.vgic.iter;
+ kfree(iter->lpi_array);
kfree(iter);
kvm->arch.vgic.iter = NULL;
mutex_unlock(&kvm->lock);
@@ -137,17 +153,20 @@ static void vgic_debug_stop(struct seq_file *s, void *v)
static void print_dist_state(struct seq_file *s, struct vgic_dist *dist)
{
+ bool v3 = dist->vgic_model == KVM_DEV_TYPE_ARM_VGIC_V3;
+
seq_printf(s, "Distributor\n");
seq_printf(s, "===========\n");
- seq_printf(s, "vgic_model:\t%s\n",
- (dist->vgic_model == KVM_DEV_TYPE_ARM_VGIC_V3) ?
- "GICv3" : "GICv2");
+ seq_printf(s, "vgic_model:\t%s\n", v3 ? "GICv3" : "GICv2");
seq_printf(s, "nr_spis:\t%d\n", dist->nr_spis);
+ if (v3)
+ seq_printf(s, "nr_lpis:\t%d\n", dist->lpi_list_count);
seq_printf(s, "enabled:\t%d\n", dist->enabled);
seq_printf(s, "\n");
seq_printf(s, "P=pending_latch, L=line_level, A=active\n");
seq_printf(s, "E=enabled, H=hw, C=config (level=1, edge=0)\n");
+ seq_printf(s, "G=group\n");
}
static void print_header(struct seq_file *s, struct vgic_irq *irq,
@@ -162,8 +181,8 @@ static void print_header(struct seq_file *s, struct vgic_irq *irq,
}
seq_printf(s, "\n");
- seq_printf(s, "%s%2d TYP ID TGT_ID PLAEHC HWID TARGET SRC PRI VCPU_ID\n", hdr, id);
- seq_printf(s, "---------------------------------------------------------------\n");
+ seq_printf(s, "%s%2d TYP ID TGT_ID PLAEHCG HWID TARGET SRC PRI VCPU_ID\n", hdr, id);
+ seq_printf(s, "----------------------------------------------------------------\n");
}
static void print_irq_state(struct seq_file *s, struct vgic_irq *irq,
@@ -174,15 +193,17 @@ static void print_irq_state(struct seq_file *s, struct vgic_irq *irq,
type = "SGI";
else if (irq->intid < VGIC_NR_PRIVATE_IRQS)
type = "PPI";
- else
+ else if (irq->intid < VGIC_MAX_SPI)
type = "SPI";
+ else
+ type = "LPI";
if (irq->intid ==0 || irq->intid == VGIC_NR_PRIVATE_IRQS)
print_header(s, irq, vcpu);
seq_printf(s, " %s %4d "
" %2d "
- "%d%d%d%d%d%d "
+ "%d%d%d%d%d%d%d "
"%8d "
"%8x "
" %2x "
@@ -197,12 +218,12 @@ static void print_irq_state(struct seq_file *s, struct vgic_irq *irq,
irq->enabled,
irq->hw,
irq->config == VGIC_CONFIG_LEVEL,
+ irq->group,
irq->hwintid,
irq->mpidr,
irq->source,
irq->priority,
(irq->vcpu) ? irq->vcpu->vcpu_id : -1);
-
}
static int vgic_debug_show(struct seq_file *s, void *v)
@@ -221,17 +242,20 @@ static int vgic_debug_show(struct seq_file *s, void *v)
if (!kvm->arch.vgic.initialized)
return 0;
- if (iter->vcpu_id < iter->nr_cpus) {
+ if (iter->vcpu_id < iter->nr_cpus)
vcpu = kvm_get_vcpu(kvm, iter->vcpu_id);
- irq = &vcpu->arch.vgic_cpu.private_irqs[iter->intid];
- } else {
- irq = &kvm->arch.vgic.spis[iter->intid - VGIC_NR_PRIVATE_IRQS];
+
+ irq = vgic_get_irq(kvm, vcpu, iter->intid);
+ if (!irq) {
+ seq_printf(s, " LPI %4d freed\n", iter->intid);
+ return 0;
}
spin_lock_irqsave(&irq->irq_lock, flags);
print_irq_state(s, irq, vcpu);
spin_unlock_irqrestore(&irq->irq_lock, flags);
+ vgic_put_irq(kvm, irq);
return 0;
}
diff --git a/virt/kvm/arm/vgic/vgic-init.c b/virt/kvm/arm/vgic/vgic-init.c
index 2673efce65f3..c0c0b88af1d5 100644
--- a/virt/kvm/arm/vgic/vgic-init.c
+++ b/virt/kvm/arm/vgic/vgic-init.c
@@ -175,10 +175,13 @@ static int kvm_vgic_dist_init(struct kvm *kvm, unsigned int nr_spis)
irq->vcpu = NULL;
irq->target_vcpu = vcpu0;
kref_init(&irq->refcount);
- if (dist->vgic_model == KVM_DEV_TYPE_ARM_VGIC_V2)
+ if (dist->vgic_model == KVM_DEV_TYPE_ARM_VGIC_V2) {
irq->targets = 0;
- else
+ irq->group = 0;
+ } else {
irq->mpidr = 0;
+ irq->group = 1;
+ }
}
return 0;
}
@@ -227,6 +230,18 @@ int kvm_vgic_vcpu_init(struct kvm_vcpu *vcpu)
/* PPIs */
irq->config = VGIC_CONFIG_LEVEL;
}
+
+ /*
+ * GICv3 can only be created via the KVM_DEVICE_CREATE API and
+ * so we always know the emulation type at this point as it's
+ * either explicitly configured as GICv3, or explicitly
+ * configured as GICv2, or not configured yet which also
+ * implies GICv2.
+ */
+ if (dist->vgic_model == KVM_DEV_TYPE_ARM_VGIC_V3)
+ irq->group = 1;
+ else
+ irq->group = 0;
}
if (!irqchip_in_kernel(vcpu->kvm))
@@ -271,6 +286,10 @@ int vgic_init(struct kvm *kvm)
if (vgic_initialized(kvm))
return 0;
+ /* Are we also in the middle of creating a VCPU? */
+ if (kvm->created_vcpus != atomic_read(&kvm->online_vcpus))
+ return -EBUSY;
+
/* freeze the number of spis */
if (!dist->nr_spis)
dist->nr_spis = VGIC_NR_IRQS_LEGACY - VGIC_NR_PRIVATE_IRQS;
@@ -294,6 +313,7 @@ int vgic_init(struct kvm *kvm)
vgic_debug_init(kvm);
+ dist->implementation_rev = 2;
dist->initialized = true;
out:
diff --git a/virt/kvm/arm/vgic/vgic-its.c b/virt/kvm/arm/vgic/vgic-its.c
index 4ed79c939fb4..12502251727e 100644
--- a/virt/kvm/arm/vgic/vgic-its.c
+++ b/virt/kvm/arm/vgic/vgic-its.c
@@ -71,6 +71,7 @@ static struct vgic_irq *vgic_add_lpi(struct kvm *kvm, u32 intid,
kref_init(&irq->refcount);
irq->intid = intid;
irq->target_vcpu = vcpu;
+ irq->group = 1;
spin_lock_irqsave(&dist->lpi_list_lock, flags);
@@ -168,8 +169,14 @@ struct vgic_its_abi {
int (*commit)(struct vgic_its *its);
};
+#define ABI_0_ESZ 8
+#define ESZ_MAX ABI_0_ESZ
+
static const struct vgic_its_abi its_table_abi_versions[] = {
- [0] = {.cte_esz = 8, .dte_esz = 8, .ite_esz = 8,
+ [0] = {
+ .cte_esz = ABI_0_ESZ,
+ .dte_esz = ABI_0_ESZ,
+ .ite_esz = ABI_0_ESZ,
.save_tables = vgic_its_save_tables_v0,
.restore_tables = vgic_its_restore_tables_v0,
.commit = vgic_its_commit_v0,
@@ -183,7 +190,7 @@ inline const struct vgic_its_abi *vgic_its_get_abi(struct vgic_its *its)
return &its_table_abi_versions[its->abi_rev];
}
-int vgic_its_set_abi(struct vgic_its *its, int rev)
+static int vgic_its_set_abi(struct vgic_its *its, u32 rev)
{
const struct vgic_its_abi *abi;
@@ -312,9 +319,9 @@ static int update_lpi_config(struct kvm *kvm, struct vgic_irq *irq,
* enumerate those LPIs without holding any lock.
* Returns their number and puts the kmalloc'ed array into intid_ptr.
*/
-static int vgic_copy_lpi_list(struct kvm_vcpu *vcpu, u32 **intid_ptr)
+int vgic_copy_lpi_list(struct kvm *kvm, struct kvm_vcpu *vcpu, u32 **intid_ptr)
{
- struct vgic_dist *dist = &vcpu->kvm->arch.vgic;
+ struct vgic_dist *dist = &kvm->arch.vgic;
struct vgic_irq *irq;
unsigned long flags;
u32 *intids;
@@ -337,7 +344,7 @@ static int vgic_copy_lpi_list(struct kvm_vcpu *vcpu, u32 **intid_ptr)
if (i == irq_count)
break;
/* We don't need to "get" the IRQ, as we hold the list lock. */
- if (irq->target_vcpu != vcpu)
+ if (vcpu && irq->target_vcpu != vcpu)
continue;
intids[i++] = irq->intid;
}
@@ -429,7 +436,7 @@ static int its_sync_lpi_pending_table(struct kvm_vcpu *vcpu)
unsigned long flags;
u8 pendmask;
- nr_irqs = vgic_copy_lpi_list(vcpu, &intids);
+ nr_irqs = vgic_copy_lpi_list(vcpu->kvm, vcpu, &intids);
if (nr_irqs < 0)
return nr_irqs;
@@ -1154,7 +1161,7 @@ static int vgic_its_cmd_handle_invall(struct kvm *kvm, struct vgic_its *its,
vcpu = kvm_get_vcpu(kvm, collection->target_addr);
- irq_count = vgic_copy_lpi_list(vcpu, &intids);
+ irq_count = vgic_copy_lpi_list(kvm, vcpu, &intids);
if (irq_count < 0)
return irq_count;
@@ -1202,7 +1209,7 @@ static int vgic_its_cmd_handle_movall(struct kvm *kvm, struct vgic_its *its,
vcpu1 = kvm_get_vcpu(kvm, target1_addr);
vcpu2 = kvm_get_vcpu(kvm, target2_addr);
- irq_count = vgic_copy_lpi_list(vcpu1, &intids);
+ irq_count = vgic_copy_lpi_list(kvm, vcpu1, &intids);
if (irq_count < 0)
return irq_count;
@@ -1881,14 +1888,14 @@ typedef int (*entry_fn_t)(struct vgic_its *its, u32 id, void *entry,
* Return: < 0 on error, 0 if last element was identified, 1 otherwise
* (the last element may not be found on second level tables)
*/
-static int scan_its_table(struct vgic_its *its, gpa_t base, int size, int esz,
+static int scan_its_table(struct vgic_its *its, gpa_t base, int size, u32 esz,
int start_id, entry_fn_t fn, void *opaque)
{
struct kvm *kvm = its->dev->kvm;
unsigned long len = size;
int id = start_id;
gpa_t gpa = base;
- char entry[esz];
+ char entry[ESZ_MAX];
int ret;
memset(entry, 0, esz);
diff --git a/virt/kvm/arm/vgic/vgic-mmio-v2.c b/virt/kvm/arm/vgic/vgic-mmio-v2.c
index ffc587bf4742..738b65d2d0e7 100644
--- a/virt/kvm/arm/vgic/vgic-mmio-v2.c
+++ b/virt/kvm/arm/vgic/vgic-mmio-v2.c
@@ -22,22 +22,33 @@
#include "vgic.h"
#include "vgic-mmio.h"
+/*
+ * The Revision field in the IIDR have the following meanings:
+ *
+ * Revision 1: Report GICv2 interrupts as group 0 instead of group 1
+ * Revision 2: Interrupt groups are guest-configurable and signaled using
+ * their configured groups.
+ */
+
static unsigned long vgic_mmio_read_v2_misc(struct kvm_vcpu *vcpu,
gpa_t addr, unsigned int len)
{
+ struct vgic_dist *vgic = &vcpu->kvm->arch.vgic;
u32 value;
switch (addr & 0x0c) {
case GIC_DIST_CTRL:
- value = vcpu->kvm->arch.vgic.enabled ? GICD_ENABLE : 0;
+ value = vgic->enabled ? GICD_ENABLE : 0;
break;
case GIC_DIST_CTR:
- value = vcpu->kvm->arch.vgic.nr_spis + VGIC_NR_PRIVATE_IRQS;
+ value = vgic->nr_spis + VGIC_NR_PRIVATE_IRQS;
value = (value >> 5) - 1;
value |= (atomic_read(&vcpu->kvm->online_vcpus) - 1) << 5;
break;
case GIC_DIST_IIDR:
- value = (PRODUCT_ID_KVM << 24) | (IMPLEMENTER_ARM << 0);
+ value = (PRODUCT_ID_KVM << GICD_IIDR_PRODUCT_ID_SHIFT) |
+ (vgic->implementation_rev << GICD_IIDR_REVISION_SHIFT) |
+ (IMPLEMENTER_ARM << GICD_IIDR_IMPLEMENTER_SHIFT);
break;
default:
return 0;
@@ -66,6 +77,42 @@ static void vgic_mmio_write_v2_misc(struct kvm_vcpu *vcpu,
}
}
+static int vgic_mmio_uaccess_write_v2_misc(struct kvm_vcpu *vcpu,
+ gpa_t addr, unsigned int len,
+ unsigned long val)
+{
+ switch (addr & 0x0c) {
+ case GIC_DIST_IIDR:
+ if (val != vgic_mmio_read_v2_misc(vcpu, addr, len))
+ return -EINVAL;
+
+ /*
+ * If we observe a write to GICD_IIDR we know that userspace
+ * has been updated and has had a chance to cope with older
+ * kernels (VGICv2 IIDR.Revision == 0) incorrectly reporting
+ * interrupts as group 1, and therefore we now allow groups to
+ * be user writable. Doing this by default would break
+ * migration from old kernels to new kernels with legacy
+ * userspace.
+ */
+ vcpu->kvm->arch.vgic.v2_groups_user_writable = true;
+ return 0;
+ }
+
+ vgic_mmio_write_v2_misc(vcpu, addr, len, val);
+ return 0;
+}
+
+static int vgic_mmio_uaccess_write_v2_group(struct kvm_vcpu *vcpu,
+ gpa_t addr, unsigned int len,
+ unsigned long val)
+{
+ if (vcpu->kvm->arch.vgic.v2_groups_user_writable)
+ vgic_mmio_write_group(vcpu, addr, len, val);
+
+ return 0;
+}
+
static void vgic_mmio_write_sgir(struct kvm_vcpu *source_vcpu,
gpa_t addr, unsigned int len,
unsigned long val)
@@ -352,17 +399,22 @@ static void vgic_mmio_write_apr(struct kvm_vcpu *vcpu,
if (n > vgic_v3_max_apr_idx(vcpu))
return;
+
+ n = array_index_nospec(n, 4);
+
/* GICv3 only uses ICH_AP1Rn for memory mapped (GICv2) guests */
vgicv3->vgic_ap1r[n] = val;
}
}
static const struct vgic_register_region vgic_v2_dist_registers[] = {
- REGISTER_DESC_WITH_LENGTH(GIC_DIST_CTRL,
- vgic_mmio_read_v2_misc, vgic_mmio_write_v2_misc, 12,
- VGIC_ACCESS_32bit),
+ REGISTER_DESC_WITH_LENGTH_UACCESS(GIC_DIST_CTRL,
+ vgic_mmio_read_v2_misc, vgic_mmio_write_v2_misc,
+ NULL, vgic_mmio_uaccess_write_v2_misc,
+ 12, VGIC_ACCESS_32bit),
REGISTER_DESC_WITH_BITS_PER_IRQ(GIC_DIST_IGROUP,
- vgic_mmio_read_rao, vgic_mmio_write_wi, NULL, NULL, 1,
+ vgic_mmio_read_group, vgic_mmio_write_group,
+ NULL, vgic_mmio_uaccess_write_v2_group, 1,
VGIC_ACCESS_32bit),
REGISTER_DESC_WITH_BITS_PER_IRQ(GIC_DIST_ENABLE_SET,
vgic_mmio_read_enable, vgic_mmio_write_senable, NULL, NULL, 1,
diff --git a/virt/kvm/arm/vgic/vgic-mmio-v3.c b/virt/kvm/arm/vgic/vgic-mmio-v3.c
index 287784095b5b..a2a175b08b17 100644
--- a/virt/kvm/arm/vgic/vgic-mmio-v3.c
+++ b/virt/kvm/arm/vgic/vgic-mmio-v3.c
@@ -59,19 +59,27 @@ bool vgic_supports_direct_msis(struct kvm *kvm)
return kvm_vgic_global_state.has_gicv4 && vgic_has_its(kvm);
}
+/*
+ * The Revision field in the IIDR have the following meanings:
+ *
+ * Revision 2: Interrupt groups are guest-configurable and signaled using
+ * their configured groups.
+ */
+
static unsigned long vgic_mmio_read_v3_misc(struct kvm_vcpu *vcpu,
gpa_t addr, unsigned int len)
{
+ struct vgic_dist *vgic = &vcpu->kvm->arch.vgic;
u32 value = 0;
switch (addr & 0x0c) {
case GICD_CTLR:
- if (vcpu->kvm->arch.vgic.enabled)
+ if (vgic->enabled)
value |= GICD_CTLR_ENABLE_SS_G1;
value |= GICD_CTLR_ARE_NS | GICD_CTLR_DS;
break;
case GICD_TYPER:
- value = vcpu->kvm->arch.vgic.nr_spis + VGIC_NR_PRIVATE_IRQS;
+ value = vgic->nr_spis + VGIC_NR_PRIVATE_IRQS;
value = (value >> 5) - 1;
if (vgic_has_its(vcpu->kvm)) {
value |= (INTERRUPT_ID_BITS_ITS - 1) << 19;
@@ -81,7 +89,9 @@ static unsigned long vgic_mmio_read_v3_misc(struct kvm_vcpu *vcpu,
}
break;
case GICD_IIDR:
- value = (PRODUCT_ID_KVM << 24) | (IMPLEMENTER_ARM << 0);
+ value = (PRODUCT_ID_KVM << GICD_IIDR_PRODUCT_ID_SHIFT) |
+ (vgic->implementation_rev << GICD_IIDR_REVISION_SHIFT) |
+ (IMPLEMENTER_ARM << GICD_IIDR_IMPLEMENTER_SHIFT);
break;
default:
return 0;
@@ -110,6 +120,20 @@ static void vgic_mmio_write_v3_misc(struct kvm_vcpu *vcpu,
}
}
+static int vgic_mmio_uaccess_write_v3_misc(struct kvm_vcpu *vcpu,
+ gpa_t addr, unsigned int len,
+ unsigned long val)
+{
+ switch (addr & 0x0c) {
+ case GICD_IIDR:
+ if (val != vgic_mmio_read_v3_misc(vcpu, addr, len))
+ return -EINVAL;
+ }
+
+ vgic_mmio_write_v3_misc(vcpu, addr, len, val);
+ return 0;
+}
+
static unsigned long vgic_mmio_read_irouter(struct kvm_vcpu *vcpu,
gpa_t addr, unsigned int len)
{
@@ -246,9 +270,9 @@ static unsigned long vgic_v3_uaccess_read_pending(struct kvm_vcpu *vcpu,
return value;
}
-static void vgic_v3_uaccess_write_pending(struct kvm_vcpu *vcpu,
- gpa_t addr, unsigned int len,
- unsigned long val)
+static int vgic_v3_uaccess_write_pending(struct kvm_vcpu *vcpu,
+ gpa_t addr, unsigned int len,
+ unsigned long val)
{
u32 intid = VGIC_ADDR_TO_INTID(addr, 1);
int i;
@@ -273,6 +297,8 @@ static void vgic_v3_uaccess_write_pending(struct kvm_vcpu *vcpu,
vgic_put_irq(vcpu->kvm, irq);
}
+
+ return 0;
}
/* We want to avoid outer shareable. */
@@ -444,14 +470,15 @@ static void vgic_mmio_write_pendbase(struct kvm_vcpu *vcpu,
}
static const struct vgic_register_region vgic_v3_dist_registers[] = {
- REGISTER_DESC_WITH_LENGTH(GICD_CTLR,
- vgic_mmio_read_v3_misc, vgic_mmio_write_v3_misc, 16,
- VGIC_ACCESS_32bit),
+ REGISTER_DESC_WITH_LENGTH_UACCESS(GICD_CTLR,
+ vgic_mmio_read_v3_misc, vgic_mmio_write_v3_misc,
+ NULL, vgic_mmio_uaccess_write_v3_misc,
+ 16, VGIC_ACCESS_32bit),
REGISTER_DESC_WITH_LENGTH(GICD_STATUSR,
vgic_mmio_read_rao, vgic_mmio_write_wi, 4,
VGIC_ACCESS_32bit),
REGISTER_DESC_WITH_BITS_PER_IRQ_SHARED(GICD_IGROUPR,
- vgic_mmio_read_rao, vgic_mmio_write_wi, NULL, NULL, 1,
+ vgic_mmio_read_group, vgic_mmio_write_group, NULL, NULL, 1,
VGIC_ACCESS_32bit),
REGISTER_DESC_WITH_BITS_PER_IRQ_SHARED(GICD_ISENABLER,
vgic_mmio_read_enable, vgic_mmio_write_senable, NULL, NULL, 1,
@@ -465,7 +492,7 @@ static const struct vgic_register_region vgic_v3_dist_registers[] = {
VGIC_ACCESS_32bit),
REGISTER_DESC_WITH_BITS_PER_IRQ_SHARED(GICD_ICPENDR,
vgic_mmio_read_pending, vgic_mmio_write_cpending,
- vgic_mmio_read_raz, vgic_mmio_write_wi, 1,
+ vgic_mmio_read_raz, vgic_mmio_uaccess_write_wi, 1,
VGIC_ACCESS_32bit),
REGISTER_DESC_WITH_BITS_PER_IRQ_SHARED(GICD_ISACTIVER,
vgic_mmio_read_active, vgic_mmio_write_sactive,
@@ -524,7 +551,7 @@ static const struct vgic_register_region vgic_v3_rdbase_registers[] = {
static const struct vgic_register_region vgic_v3_sgibase_registers[] = {
REGISTER_DESC_WITH_LENGTH(GICR_IGROUPR0,
- vgic_mmio_read_rao, vgic_mmio_write_wi, 4,
+ vgic_mmio_read_group, vgic_mmio_write_group, 4,
VGIC_ACCESS_32bit),
REGISTER_DESC_WITH_LENGTH(GICR_ISENABLER0,
vgic_mmio_read_enable, vgic_mmio_write_senable, 4,
@@ -538,7 +565,7 @@ static const struct vgic_register_region vgic_v3_sgibase_registers[] = {
VGIC_ACCESS_32bit),
REGISTER_DESC_WITH_LENGTH_UACCESS(GICR_ICPENDR0,
vgic_mmio_read_pending, vgic_mmio_write_cpending,
- vgic_mmio_read_raz, vgic_mmio_write_wi, 4,
+ vgic_mmio_read_raz, vgic_mmio_uaccess_write_wi, 4,
VGIC_ACCESS_32bit),
REGISTER_DESC_WITH_LENGTH_UACCESS(GICR_ISACTIVER0,
vgic_mmio_read_active, vgic_mmio_write_sactive,
@@ -873,7 +900,8 @@ static int match_mpidr(u64 sgi_aff, u16 sgi_cpu_mask, struct kvm_vcpu *vcpu)
/**
* vgic_v3_dispatch_sgi - handle SGI requests from VCPUs
* @vcpu: The VCPU requesting a SGI
- * @reg: The value written into the ICC_SGI1R_EL1 register by that VCPU
+ * @reg: The value written into ICC_{ASGI1,SGI0,SGI1}R by that VCPU
+ * @allow_group1: Does the sysreg access allow generation of G1 SGIs
*
* With GICv3 (and ARE=1) CPUs trigger SGIs by writing to a system register.
* This will trap in sys_regs.c and call this function.
@@ -883,7 +911,7 @@ static int match_mpidr(u64 sgi_aff, u16 sgi_cpu_mask, struct kvm_vcpu *vcpu)
* check for matching ones. If this bit is set, we signal all, but not the
* calling VCPU.
*/
-void vgic_v3_dispatch_sgi(struct kvm_vcpu *vcpu, u64 reg)
+void vgic_v3_dispatch_sgi(struct kvm_vcpu *vcpu, u64 reg, bool allow_group1)
{
struct kvm *kvm = vcpu->kvm;
struct kvm_vcpu *c_vcpu;
@@ -932,9 +960,19 @@ void vgic_v3_dispatch_sgi(struct kvm_vcpu *vcpu, u64 reg)
irq = vgic_get_irq(vcpu->kvm, c_vcpu, sgi);
spin_lock_irqsave(&irq->irq_lock, flags);
- irq->pending_latch = true;
- vgic_queue_irq_unlock(vcpu->kvm, irq, flags);
+ /*
+ * An access targetting Group0 SGIs can only generate
+ * those, while an access targetting Group1 SGIs can
+ * generate interrupts of either group.
+ */
+ if (!irq->group || allow_group1) {
+ irq->pending_latch = true;
+ vgic_queue_irq_unlock(vcpu->kvm, irq, flags);
+ } else {
+ spin_unlock_irqrestore(&irq->irq_lock, flags);
+ }
+
vgic_put_irq(vcpu->kvm, irq);
}
}
diff --git a/virt/kvm/arm/vgic/vgic-mmio.c b/virt/kvm/arm/vgic/vgic-mmio.c
index ff9655cfeb2f..f56ff1cf52ec 100644
--- a/virt/kvm/arm/vgic/vgic-mmio.c
+++ b/virt/kvm/arm/vgic/vgic-mmio.c
@@ -40,6 +40,51 @@ void vgic_mmio_write_wi(struct kvm_vcpu *vcpu, gpa_t addr,
/* Ignore */
}
+int vgic_mmio_uaccess_write_wi(struct kvm_vcpu *vcpu, gpa_t addr,
+ unsigned int len, unsigned long val)
+{
+ /* Ignore */
+ return 0;
+}
+
+unsigned long vgic_mmio_read_group(struct kvm_vcpu *vcpu,
+ gpa_t addr, unsigned int len)
+{
+ u32 intid = VGIC_ADDR_TO_INTID(addr, 1);
+ u32 value = 0;
+ int i;
+
+ /* Loop over all IRQs affected by this read */
+ for (i = 0; i < len * 8; i++) {
+ struct vgic_irq *irq = vgic_get_irq(vcpu->kvm, vcpu, intid + i);
+
+ if (irq->group)
+ value |= BIT(i);
+
+ vgic_put_irq(vcpu->kvm, irq);
+ }
+
+ return value;
+}
+
+void vgic_mmio_write_group(struct kvm_vcpu *vcpu, gpa_t addr,
+ unsigned int len, unsigned long val)
+{
+ u32 intid = VGIC_ADDR_TO_INTID(addr, 1);
+ int i;
+ unsigned long flags;
+
+ for (i = 0; i < len * 8; i++) {
+ struct vgic_irq *irq = vgic_get_irq(vcpu->kvm, vcpu, intid + i);
+
+ spin_lock_irqsave(&irq->irq_lock, flags);
+ irq->group = !!(val & BIT(i));
+ vgic_queue_irq_unlock(vcpu->kvm, irq, flags);
+
+ vgic_put_irq(vcpu->kvm, irq);
+ }
+}
+
/*
* Read accesses to both GICD_ICENABLER and GICD_ISENABLER return the value
* of the enabled bit, so there is only one function for both here.
@@ -363,11 +408,12 @@ void vgic_mmio_write_cactive(struct kvm_vcpu *vcpu,
mutex_unlock(&vcpu->kvm->lock);
}
-void vgic_mmio_uaccess_write_cactive(struct kvm_vcpu *vcpu,
+int vgic_mmio_uaccess_write_cactive(struct kvm_vcpu *vcpu,
gpa_t addr, unsigned int len,
unsigned long val)
{
__vgic_mmio_write_cactive(vcpu, addr, len, val);
+ return 0;
}
static void __vgic_mmio_write_sactive(struct kvm_vcpu *vcpu,
@@ -399,11 +445,12 @@ void vgic_mmio_write_sactive(struct kvm_vcpu *vcpu,
mutex_unlock(&vcpu->kvm->lock);
}
-void vgic_mmio_uaccess_write_sactive(struct kvm_vcpu *vcpu,
+int vgic_mmio_uaccess_write_sactive(struct kvm_vcpu *vcpu,
gpa_t addr, unsigned int len,
unsigned long val)
{
__vgic_mmio_write_sactive(vcpu, addr, len, val);
+ return 0;
}
unsigned long vgic_mmio_read_priority(struct kvm_vcpu *vcpu,
@@ -735,10 +782,9 @@ static int vgic_uaccess_write(struct kvm_vcpu *vcpu, struct kvm_io_device *dev,
r_vcpu = iodev->redist_vcpu ? iodev->redist_vcpu : vcpu;
if (region->uaccess_write)
- region->uaccess_write(r_vcpu, addr, sizeof(u32), *val);
- else
- region->write(r_vcpu, addr, sizeof(u32), *val);
+ return region->uaccess_write(r_vcpu, addr, sizeof(u32), *val);
+ region->write(r_vcpu, addr, sizeof(u32), *val);
return 0;
}
diff --git a/virt/kvm/arm/vgic/vgic-mmio.h b/virt/kvm/arm/vgic/vgic-mmio.h
index 5693f6df45ec..a07f90acdaec 100644
--- a/virt/kvm/arm/vgic/vgic-mmio.h
+++ b/virt/kvm/arm/vgic/vgic-mmio.h
@@ -37,8 +37,8 @@ struct vgic_register_region {
unsigned long (*uaccess_read)(struct kvm_vcpu *vcpu, gpa_t addr,
unsigned int len);
union {
- void (*uaccess_write)(struct kvm_vcpu *vcpu, gpa_t addr,
- unsigned int len, unsigned long val);
+ int (*uaccess_write)(struct kvm_vcpu *vcpu, gpa_t addr,
+ unsigned int len, unsigned long val);
int (*uaccess_its_write)(struct kvm *kvm, struct vgic_its *its,
gpa_t addr, unsigned int len,
unsigned long val);
@@ -134,6 +134,15 @@ unsigned long vgic_mmio_read_rao(struct kvm_vcpu *vcpu,
void vgic_mmio_write_wi(struct kvm_vcpu *vcpu, gpa_t addr,
unsigned int len, unsigned long val);
+int vgic_mmio_uaccess_write_wi(struct kvm_vcpu *vcpu, gpa_t addr,
+ unsigned int len, unsigned long val);
+
+unsigned long vgic_mmio_read_group(struct kvm_vcpu *vcpu, gpa_t addr,
+ unsigned int len);
+
+void vgic_mmio_write_group(struct kvm_vcpu *vcpu, gpa_t addr,
+ unsigned int len, unsigned long val);
+
unsigned long vgic_mmio_read_enable(struct kvm_vcpu *vcpu,
gpa_t addr, unsigned int len);
@@ -167,13 +176,13 @@ void vgic_mmio_write_sactive(struct kvm_vcpu *vcpu,
gpa_t addr, unsigned int len,
unsigned long val);
-void vgic_mmio_uaccess_write_cactive(struct kvm_vcpu *vcpu,
- gpa_t addr, unsigned int len,
- unsigned long val);
+int vgic_mmio_uaccess_write_cactive(struct kvm_vcpu *vcpu,
+ gpa_t addr, unsigned int len,
+ unsigned long val);
-void vgic_mmio_uaccess_write_sactive(struct kvm_vcpu *vcpu,
- gpa_t addr, unsigned int len,
- unsigned long val);
+int vgic_mmio_uaccess_write_sactive(struct kvm_vcpu *vcpu,
+ gpa_t addr, unsigned int len,
+ unsigned long val);
unsigned long vgic_mmio_read_priority(struct kvm_vcpu *vcpu,
gpa_t addr, unsigned int len);
diff --git a/virt/kvm/arm/vgic/vgic-v2.c b/virt/kvm/arm/vgic/vgic-v2.c
index a5f2e44f1c33..69b892abd7dc 100644
--- a/virt/kvm/arm/vgic/vgic-v2.c
+++ b/virt/kvm/arm/vgic/vgic-v2.c
@@ -62,7 +62,8 @@ void vgic_v2_fold_lr_state(struct kvm_vcpu *vcpu)
struct vgic_cpu *vgic_cpu = &vcpu->arch.vgic_cpu;
struct vgic_v2_cpu_if *cpuif = &vgic_cpu->vgic_v2;
int lr;
- unsigned long flags;
+
+ DEBUG_SPINLOCK_BUG_ON(!irqs_disabled());
cpuif->vgic_hcr &= ~GICH_HCR_UIE;
@@ -83,7 +84,7 @@ void vgic_v2_fold_lr_state(struct kvm_vcpu *vcpu)
irq = vgic_get_irq(vcpu->kvm, vcpu, intid);
- spin_lock_irqsave(&irq->irq_lock, flags);
+ spin_lock(&irq->irq_lock);
/* Always preserve the active bit */
irq->active = !!(val & GICH_LR_ACTIVE_BIT);
@@ -126,7 +127,7 @@ void vgic_v2_fold_lr_state(struct kvm_vcpu *vcpu)
vgic_irq_set_phys_active(irq, false);
}
- spin_unlock_irqrestore(&irq->irq_lock, flags);
+ spin_unlock(&irq->irq_lock);
vgic_put_irq(vcpu->kvm, irq);
}
@@ -159,6 +160,9 @@ void vgic_v2_populate_lr(struct kvm_vcpu *vcpu, struct vgic_irq *irq, int lr)
}
}
+ if (irq->group)
+ val |= GICH_LR_GROUP1;
+
if (irq->hw) {
val |= GICH_LR_HW;
val |= irq->hwintid << GICH_LR_PHYSID_CPUID_SHIFT;
diff --git a/virt/kvm/arm/vgic/vgic-v3.c b/virt/kvm/arm/vgic/vgic-v3.c
index cdce653e3c47..9c0dd234ebe8 100644
--- a/virt/kvm/arm/vgic/vgic-v3.c
+++ b/virt/kvm/arm/vgic/vgic-v3.c
@@ -46,7 +46,8 @@ void vgic_v3_fold_lr_state(struct kvm_vcpu *vcpu)
struct vgic_v3_cpu_if *cpuif = &vgic_cpu->vgic_v3;
u32 model = vcpu->kvm->arch.vgic.vgic_model;
int lr;
- unsigned long flags;
+
+ DEBUG_SPINLOCK_BUG_ON(!irqs_disabled());
cpuif->vgic_hcr &= ~ICH_HCR_UIE;
@@ -75,7 +76,7 @@ void vgic_v3_fold_lr_state(struct kvm_vcpu *vcpu)
if (!irq) /* An LPI could have been unmapped. */
continue;
- spin_lock_irqsave(&irq->irq_lock, flags);
+ spin_lock(&irq->irq_lock);
/* Always preserve the active bit */
irq->active = !!(val & ICH_LR_ACTIVE_BIT);
@@ -118,7 +119,7 @@ void vgic_v3_fold_lr_state(struct kvm_vcpu *vcpu)
vgic_irq_set_phys_active(irq, false);
}
- spin_unlock_irqrestore(&irq->irq_lock, flags);
+ spin_unlock(&irq->irq_lock);
vgic_put_irq(vcpu->kvm, irq);
}
@@ -197,11 +198,7 @@ void vgic_v3_populate_lr(struct kvm_vcpu *vcpu, struct vgic_irq *irq, int lr)
if (vgic_irq_is_mapped_level(irq) && (val & ICH_LR_PENDING_BIT))
irq->line_level = false;
- /*
- * We currently only support Group1 interrupts, which is a
- * known defect. This needs to be addressed at some point.
- */
- if (model == KVM_DEV_TYPE_ARM_VGIC_V3)
+ if (irq->group)
val |= ICH_LR_GROUP;
val |= (u64)irq->priority << ICH_LR_PRIORITY_SHIFT;
diff --git a/virt/kvm/arm/vgic/vgic.c b/virt/kvm/arm/vgic/vgic.c
index 33c8325c8f35..7cfdfbc910e0 100644
--- a/virt/kvm/arm/vgic/vgic.c
+++ b/virt/kvm/arm/vgic/vgic.c
@@ -28,12 +28,6 @@
#define CREATE_TRACE_POINTS
#include "trace.h"
-#ifdef CONFIG_DEBUG_SPINLOCK
-#define DEBUG_SPINLOCK_BUG_ON(p) BUG_ON(p)
-#else
-#define DEBUG_SPINLOCK_BUG_ON(p)
-#endif
-
struct vgic_global kvm_vgic_global_state __ro_after_init = {
.gicv3_cpuif = STATIC_KEY_FALSE_INIT,
};
@@ -599,10 +593,11 @@ static void vgic_prune_ap_list(struct kvm_vcpu *vcpu)
{
struct vgic_cpu *vgic_cpu = &vcpu->arch.vgic_cpu;
struct vgic_irq *irq, *tmp;
- unsigned long flags;
+
+ DEBUG_SPINLOCK_BUG_ON(!irqs_disabled());
retry:
- spin_lock_irqsave(&vgic_cpu->ap_list_lock, flags);
+ spin_lock(&vgic_cpu->ap_list_lock);
list_for_each_entry_safe(irq, tmp, &vgic_cpu->ap_list_head, ap_list) {
struct kvm_vcpu *target_vcpu, *vcpuA, *vcpuB;
@@ -643,7 +638,7 @@ retry:
/* This interrupt looks like it has to be migrated. */
spin_unlock(&irq->irq_lock);
- spin_unlock_irqrestore(&vgic_cpu->ap_list_lock, flags);
+ spin_unlock(&vgic_cpu->ap_list_lock);
/*
* Ensure locking order by always locking the smallest
@@ -657,7 +652,7 @@ retry:
vcpuB = vcpu;
}
- spin_lock_irqsave(&vcpuA->arch.vgic_cpu.ap_list_lock, flags);
+ spin_lock(&vcpuA->arch.vgic_cpu.ap_list_lock);
spin_lock_nested(&vcpuB->arch.vgic_cpu.ap_list_lock,
SINGLE_DEPTH_NESTING);
spin_lock(&irq->irq_lock);
@@ -682,7 +677,7 @@ retry:
spin_unlock(&irq->irq_lock);
spin_unlock(&vcpuB->arch.vgic_cpu.ap_list_lock);
- spin_unlock_irqrestore(&vcpuA->arch.vgic_cpu.ap_list_lock, flags);
+ spin_unlock(&vcpuA->arch.vgic_cpu.ap_list_lock);
if (target_vcpu_needs_kick) {
kvm_make_request(KVM_REQ_IRQ_PENDING, target_vcpu);
@@ -692,7 +687,7 @@ retry:
goto retry;
}
- spin_unlock_irqrestore(&vgic_cpu->ap_list_lock, flags);
+ spin_unlock(&vgic_cpu->ap_list_lock);
}
static inline void vgic_fold_lr_state(struct kvm_vcpu *vcpu)
diff --git a/virt/kvm/arm/vgic/vgic.h b/virt/kvm/arm/vgic/vgic.h
index ead00b2072b2..a90024718ca4 100644
--- a/virt/kvm/arm/vgic/vgic.h
+++ b/virt/kvm/arm/vgic/vgic.h
@@ -103,6 +103,12 @@
#define KVM_VGIC_V3_RDIST_COUNT_MASK GENMASK_ULL(63, 52)
#define KVM_VGIC_V3_RDIST_COUNT_SHIFT 52
+#ifdef CONFIG_DEBUG_SPINLOCK
+#define DEBUG_SPINLOCK_BUG_ON(p) BUG_ON(p)
+#else
+#define DEBUG_SPINLOCK_BUG_ON(p)
+#endif
+
/* Requires the irq_lock to be held by the caller. */
static inline bool irq_is_pending(struct vgic_irq *irq)
{
@@ -305,6 +311,7 @@ static inline bool vgic_dist_overlap(struct kvm *kvm, gpa_t base, size_t size)
(base < d->vgic_dist_base + KVM_VGIC_V3_DIST_SIZE);
}
+int vgic_copy_lpi_list(struct kvm *kvm, struct kvm_vcpu *vcpu, u32 **intid_ptr);
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);