-EFAULT if struct kvm_reinject_control cannot be read,
-EINVAL if the supplied shift or flags are invalid,
-ENOMEM if unable to allocate the new HPT,
- -ENOSPC if there was a hash collision
-
-::
-
- struct kvm_ppc_rmmu_info {
- struct kvm_ppc_radix_geom {
- __u8 page_shift;
- __u8 level_bits[4];
- __u8 pad[3];
- } geometries[8];
- __u32 ap_encodings[8];
- };
-
-The geometries[] field gives up to 8 supported geometries for the
-radix page table, in terms of the log base 2 of the smallest page
-size, and the number of bits indexed at each level of the tree, from
-the PTE level up to the PGD level in that order. Any unused entries
-will have 0 in the page_shift field.
-
-The ap_encodings gives the supported page sizes and their AP field
-encodings, encoded with the AP value in the top 3 bits and the log
-base 2 of the page size in the bottom 6 bits.
-
-4.102 KVM_PPC_RESIZE_HPT_PREPARE
---------------------------------
-
-:Capability: KVM_CAP_SPAPR_RESIZE_HPT
-:Architectures: powerpc
-:Type: vm ioctl
-:Parameters: struct kvm_ppc_resize_hpt (in)
-:Returns: 0 on successful completion,
- >0 if a new HPT is being prepared, the value is an estimated
- number of milliseconds until preparation is complete,
- -EFAULT if struct kvm_reinject_control cannot be read,
- -EINVAL if the supplied shift or flags are invalid,when moving existing
- HPT entries to the new HPT,
- -EIO on other error conditions
Used to implement the PAPR extension for runtime resizing of a guest's
Hashed Page Table (HPT). Specifically this starts, stops or monitors
the preparation of a new potential HPT for the guest, essentially
implementing the H_RESIZE_HPT_PREPARE hypercall.
+::
+
+ struct kvm_ppc_resize_hpt {
+ __u64 flags;
+ __u32 shift;
+ __u32 pad;
+ };
+
If called with shift > 0 when there is no pending HPT for the guest,
this begins preparation of a new pending HPT of size 2^(shift) bytes.
It then returns a positive integer with the estimated number of
it returns <= 0. The first call will initiate preparation, subsequent
ones will monitor preparation until it completes or fails.
-::
-
- struct kvm_ppc_resize_hpt {
- __u64 flags;
- __u32 shift;
- __u32 pad;
- };
-
4.103 KVM_PPC_RESIZE_HPT_COMMIT
-------------------------------
transferred to working with the new HPT, essentially implementing the
H_RESIZE_HPT_COMMIT hypercall.
+::
+
+ struct kvm_ppc_resize_hpt {
+ __u64 flags;
+ __u32 shift;
+ __u32 pad;
+ };
+
This should only be called after KVM_PPC_RESIZE_HPT_PREPARE has
returned 0 with the same parameters. In other cases
KVM_PPC_RESIZE_HPT_COMMIT will return an error (usually -ENXIO or
On failure, the guest will still be operating on its previous HPT.
-::
-
- struct kvm_ppc_resize_hpt {
- __u64 flags;
- __u32 shift;
- __u32 pad;
- };
-
4.104 KVM_X86_GET_MCE_CAP_SUPPORTED
-----------------------------------
union {
__u64 gpa;
__u64 pad[4];
+ struct {
+ __u64 state;
+ __u64 state_entry_time;
+ __u64 time_running;
+ __u64 time_runnable;
+ __u64 time_blocked;
+ __u64 time_offline;
+ } runstate;
} u;
};
Sets the guest physical address of an additional pvclock structure
for a given vCPU. This is typically used for guest vsyscall support.
+KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_ADDR
+ Sets the guest physical address of the vcpu_runstate_info for a given
+ vCPU. This is how a Xen guest tracks CPU state such as steal time.
+
+KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_CURRENT
+ Sets the runstate (RUNSTATE_running/_runnable/_blocked/_offline) of
+ the given vCPU from the .u.runstate.state member of the structure.
+ KVM automatically accounts running and runnable time but blocked
+ and offline states are only entered explicitly.
+
+KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_DATA
+ Sets all fields of the vCPU runstate data from the .u.runstate member
+ of the structure, including the current runstate. The state_entry_time
+ must equal the sum of the other four times.
+
+KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_ADJUST
+ This *adds* the contents of the .u.runstate members of the structure
+ to the corresponding members of the given vCPU's runstate data, thus
+ permitting atomic adjustments to the runstate times. The adjustment
+ to the state_entry_time must equal the sum of the adjustments to the
+ other four times. The state field must be set to -1, or to a valid
+ runstate value (RUNSTATE_running, RUNSTATE_runnable, RUNSTATE_blocked
+ or RUNSTATE_offline) to set the current accounted state as of the
+ adjusted state_entry_time.
+
4.130 KVM_XEN_VCPU_GET_ATTR
---------------------------
Allows Xen vCPU attributes to be read. For the structure and types,
see KVM_XEN_VCPU_SET_ATTR above.
+The KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_ADJUST type may not be used
+with the KVM_XEN_VCPU_GET_ATTR ioctl.
+
5. The kvm_run structure
========================
__u16 flags;
More architecture-specific flags detailing state of the VCPU that may
-affect the device's behavior. Current defined flags:
+affect the device's behavior. Current defined flags::
+
/* x86, set if the VCPU is in system management mode */
#define KVM_RUN_X86_SMM (1 << 0)
/* x86, set if bus lock detected in VM */
notifications to userspace can be KVM_EXIT_BUS_LOCK or other reasons.
KVM_RUN_BUS_LOCK flag is used to distinguish between them.
-7.22 KVM_CAP_PPC_DAWR1
+7.23 KVM_CAP_PPC_DAWR1
----------------------
:Architectures: ppc
#define KVM_XEN_HVM_CONFIG_HYPERCALL_MSR (1 << 0)
#define KVM_XEN_HVM_CONFIG_INTERCEPT_HCALL (1 << 1)
#define KVM_XEN_HVM_CONFIG_SHARED_INFO (1 << 2)
+ #define KVM_XEN_HVM_CONFIG_RUNSTATE (1 << 2)
The KVM_XEN_HVM_CONFIG_HYPERCALL_MSR flag indicates that the KVM_XEN_HVM_CONFIG
ioctl is available, for the guest to set its hypercall page.
KVM_XEN_VCPU_GET_ATTR ioctls, as well as the delivery of exception vectors
for event channel upcalls when the evtchn_upcall_pending field of a vcpu's
vcpu_info is set.
+
+The KVM_XEN_HVM_CONFIG_RUNSTATE flag indicates that the runstate-related
+features KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_ADDR/_CURRENT/_DATA/_ADJUST are
+supported by the KVM_XEN_VCPU_SET_ATTR/KVM_XEN_VCPU_GET_ATTR ioctls.
/* Xen HVM per vcpu emulation context */
struct kvm_vcpu_xen {
u64 hypercall_rip;
+ u32 current_runstate;
bool vcpu_info_set;
bool vcpu_time_info_set;
+ bool runstate_set;
struct gfn_to_hva_cache vcpu_info_cache;
struct gfn_to_hva_cache vcpu_time_info_cache;
+ struct gfn_to_hva_cache runstate_cache;
+ u64 last_steal;
+ u64 runstate_entry_time;
+ u64 runstate_times[4];
};
struct kvm_vcpu_arch {
unsigned int indirect_shadow_pages;
u8 mmu_valid_gen;
struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
- /*
- * Hash table of struct kvm_mmu_page.
- */
struct list_head active_mmu_pages;
struct list_head zapped_obsolete_pages;
struct list_head lpage_disallowed_mmu_pages;
Provides support for launching Encrypted VMs (SEV) and Encrypted VMs
with Encrypted State (SEV-ES) on AMD processors.
+config KVM_XEN
+ bool "Support for Xen hypercall interface"
+ depends on KVM
+ help
+ Provides KVM support for the hosting Xen HVM guests and
+ passing Xen hypercalls to userspace.
+
+ If in doubt, say "N".
+
config KVM_MMU_AUDIT
bool "Audit KVM MMU"
depends on KVM && TRACEPOINTS
$(KVM)/dirty_ring.o
kvm-$(CONFIG_KVM_ASYNC_PF) += $(KVM)/async_pf.o
-kvm-y += x86.o emulate.o i8259.o irq.o lapic.o xen.o \
+kvm-y += x86.o emulate.o i8259.o irq.o lapic.o \
i8254.o ioapic.o irq_comm.o cpuid.o pmu.o mtrr.o \
hyperv.o debugfs.o mmu/mmu.o mmu/page_track.o \
mmu/spte.o
kvm-$(CONFIG_X86_64) += mmu/tdp_iter.o mmu/tdp_mmu.o
+kvm-$(CONFIG_KVM_XEN) += xen.o
kvm-intel-y += vmx/vmx.o vmx/vmenter.o vmx/pmu_intel.o vmx/vmcs12.o \
vmx/evmcs.o vmx/nested.o vmx/posted_intr.o
struct kvm_vcpu_hv_synic *synic;
vcpu = get_vcpu_by_vpidx(kvm, vpidx);
- if (!vcpu)
+ if (!vcpu || !to_hv_vcpu(vcpu))
return NULL;
synic = to_hv_synic(vcpu);
return (synic->active) ? synic : NULL;
static inline bool kvm_vcpu_ad_need_write_protect(struct kvm_vcpu *vcpu)
{
/*
- * When using the EPT page-modification log, the GPAs in the log
- * would come from L2 rather than L1. Therefore, we need to rely
- * on write protection to record dirty pages. This also bypasses
- * PML, since writes now result in a vmexit. Note, this helper will
- * tag SPTEs as needing write-protection even if PML is disabled or
- * unsupported, but that's ok because the tag is consumed if and only
- * if PML is enabled. Omit the PML check to save a few uops.
+ * When using the EPT page-modification log, the GPAs in the CPU dirty
+ * log would come from L2 rather than L1. Therefore, we need to rely
+ * on write protection to record dirty pages, which bypasses PML, since
+ * writes now result in a vmexit. Note, the check on CPU dirty logging
+ * being enabled is mandatory as the bits used to denote WP-only SPTEs
+ * are reserved for NPT w/ PAE (32-bit KVM).
*/
- return vcpu->arch.mmu == &vcpu->arch.guest_mmu;
+ return vcpu->arch.mmu == &vcpu->arch.guest_mmu &&
+ kvm_x86_ops.cpu_dirty_log_size;
}
bool is_nx_huge_page_enabled(void);
init_sys_seg(&save->ldtr, SEG_TYPE_LDT);
init_sys_seg(&save->tr, SEG_TYPE_BUSY_TSS16);
+ svm_set_cr4(&svm->vcpu, 0);
svm_set_efer(&svm->vcpu, 0);
save->dr6 = 0xffff0ff0;
kvm_set_rflags(&svm->vcpu, X86_EFLAGS_FIXED);
struct kvm_host_map map;
struct kvm_steal_time *st;
+ if (kvm_xen_msr_enabled(vcpu->kvm)) {
+ kvm_xen_runstate_set_running(vcpu);
+ return;
+ }
+
if (!(vcpu->arch.st.msr_val & KVM_MSR_ENABLED))
return;
case KVM_CAP_ENFORCE_PV_FEATURE_CPUID:
r = 1;
break;
+#ifdef CONFIG_KVM_XEN
case KVM_CAP_XEN_HVM:
r = KVM_XEN_HVM_CONFIG_HYPERCALL_MSR |
KVM_XEN_HVM_CONFIG_INTERCEPT_HCALL |
KVM_XEN_HVM_CONFIG_SHARED_INFO;
+ if (sched_info_on())
+ r |= KVM_XEN_HVM_CONFIG_RUNSTATE;
break;
+#endif
case KVM_CAP_SYNC_REGS:
r = KVM_SYNC_X86_VALID_FIELDS;
break;
if (vcpu->preempted && !vcpu->arch.guest_state_protected)
vcpu->arch.preempted_in_kernel = !static_call(kvm_x86_get_cpl)(vcpu);
- kvm_steal_time_set_preempted(vcpu);
+ if (kvm_xen_msr_enabled(vcpu->kvm))
+ kvm_xen_runstate_set_preempted(vcpu);
+ else
+ kvm_steal_time_set_preempted(vcpu);
+
static_call(kvm_x86_vcpu_put)(vcpu);
vcpu->arch.last_host_tsc = rdtsc();
/*
case KVM_GET_SUPPORTED_HV_CPUID:
r = kvm_ioctl_get_supported_hv_cpuid(vcpu, argp);
break;
+#ifdef CONFIG_KVM_XEN
case KVM_XEN_VCPU_GET_ATTR: {
struct kvm_xen_vcpu_attr xva;
r = kvm_xen_vcpu_set_attr(vcpu, &xva);
break;
}
+#endif
default:
r = -EINVAL;
}
kvm->arch.bsp_vcpu_id = arg;
mutex_unlock(&kvm->lock);
break;
+#ifdef CONFIG_KVM_XEN
case KVM_XEN_HVM_CONFIG: {
struct kvm_xen_hvm_config xhc;
r = -EFAULT;
r = kvm_xen_hvm_set_attr(kvm, &xha);
break;
}
+#endif
case KVM_SET_CLOCK: {
struct kvm_clock_data user_ns;
u64 now_ns;
kvm_mmu_module_exit();
free_percpu(user_return_msrs);
kmem_cache_destroy(x86_fpu_cache);
+#ifdef CONFIG_KVM_XEN
+ static_key_deferred_flush(&kvm_xen_enabled);
WARN_ON(static_branch_unlikely(&kvm_xen_enabled.key));
+#endif
}
static int __kvm_vcpu_halt(struct kvm_vcpu *vcpu, int state, int reason)
#include "hyperv.h"
#include <linux/kvm_host.h>
+#include <linux/sched/stat.h>
#include <trace/events/kvm.h>
#include <xen/interface/xen.h>
+#include <xen/interface/vcpu.h>
#include "trace.h"
return ret;
}
+static void kvm_xen_update_runstate(struct kvm_vcpu *v, int state)
+{
+ struct kvm_vcpu_xen *vx = &v->arch.xen;
+ u64 now = get_kvmclock_ns(v->kvm);
+ u64 delta_ns = now - vx->runstate_entry_time;
+ u64 run_delay = current->sched_info.run_delay;
+
+ if (unlikely(!vx->runstate_entry_time))
+ vx->current_runstate = RUNSTATE_offline;
+
+ /*
+ * Time waiting for the scheduler isn't "stolen" if the
+ * vCPU wasn't running anyway.
+ */
+ if (vx->current_runstate == RUNSTATE_running) {
+ u64 steal_ns = run_delay - vx->last_steal;
+
+ delta_ns -= steal_ns;
+
+ vx->runstate_times[RUNSTATE_runnable] += steal_ns;
+ }
+ vx->last_steal = run_delay;
+
+ vx->runstate_times[vx->current_runstate] += delta_ns;
+ vx->current_runstate = state;
+ vx->runstate_entry_time = now;
+}
+
+void kvm_xen_update_runstate_guest(struct kvm_vcpu *v, int state)
+{
+ struct kvm_vcpu_xen *vx = &v->arch.xen;
+ uint64_t state_entry_time;
+ unsigned int offset;
+
+ kvm_xen_update_runstate(v, state);
+
+ if (!vx->runstate_set)
+ return;
+
+ BUILD_BUG_ON(sizeof(struct compat_vcpu_runstate_info) != 0x2c);
+
+ offset = offsetof(struct compat_vcpu_runstate_info, state_entry_time);
+#ifdef CONFIG_X86_64
+ /*
+ * The only difference is alignment of uint64_t in 32-bit.
+ * So the first field 'state' is accessed directly using
+ * offsetof() (where its offset happens to be zero), while the
+ * remaining fields which are all uint64_t, start at 'offset'
+ * which we tweak here by adding 4.
+ */
+ BUILD_BUG_ON(offsetof(struct vcpu_runstate_info, state_entry_time) !=
+ offsetof(struct compat_vcpu_runstate_info, state_entry_time) + 4);
+ BUILD_BUG_ON(offsetof(struct vcpu_runstate_info, time) !=
+ offsetof(struct compat_vcpu_runstate_info, time) + 4);
+
+ if (v->kvm->arch.xen.long_mode)
+ offset = offsetof(struct vcpu_runstate_info, state_entry_time);
+#endif
+ /*
+ * First write the updated state_entry_time at the appropriate
+ * location determined by 'offset'.
+ */
+ state_entry_time = vx->runstate_entry_time;
+ state_entry_time |= XEN_RUNSTATE_UPDATE;
+
+ BUILD_BUG_ON(sizeof(((struct vcpu_runstate_info *)0)->state_entry_time) !=
+ sizeof(state_entry_time));
+ BUILD_BUG_ON(sizeof(((struct compat_vcpu_runstate_info *)0)->state_entry_time) !=
+ sizeof(state_entry_time));
+
+ if (kvm_write_guest_offset_cached(v->kvm, &v->arch.xen.runstate_cache,
+ &state_entry_time, offset,
+ sizeof(state_entry_time)))
+ return;
+ smp_wmb();
+
+ /*
+ * Next, write the new runstate. This is in the *same* place
+ * for 32-bit and 64-bit guests, asserted here for paranoia.
+ */
+ BUILD_BUG_ON(offsetof(struct vcpu_runstate_info, state) !=
+ offsetof(struct compat_vcpu_runstate_info, state));
+ BUILD_BUG_ON(sizeof(((struct vcpu_runstate_info *)0)->state) !=
+ sizeof(vx->current_runstate));
+ BUILD_BUG_ON(sizeof(((struct compat_vcpu_runstate_info *)0)->state) !=
+ sizeof(vx->current_runstate));
+
+ if (kvm_write_guest_offset_cached(v->kvm, &v->arch.xen.runstate_cache,
+ &vx->current_runstate,
+ offsetof(struct vcpu_runstate_info, state),
+ sizeof(vx->current_runstate)))
+ return;
+
+ /*
+ * Write the actual runstate times immediately after the
+ * runstate_entry_time.
+ */
+ BUILD_BUG_ON(offsetof(struct vcpu_runstate_info, state_entry_time) !=
+ offsetof(struct vcpu_runstate_info, time) - sizeof(u64));
+ BUILD_BUG_ON(offsetof(struct compat_vcpu_runstate_info, state_entry_time) !=
+ offsetof(struct compat_vcpu_runstate_info, time) - sizeof(u64));
+ BUILD_BUG_ON(sizeof(((struct vcpu_runstate_info *)0)->time) !=
+ sizeof(((struct compat_vcpu_runstate_info *)0)->time));
+ BUILD_BUG_ON(sizeof(((struct vcpu_runstate_info *)0)->time) !=
+ sizeof(vx->runstate_times));
+
+ if (kvm_write_guest_offset_cached(v->kvm, &v->arch.xen.runstate_cache,
+ &vx->runstate_times[0],
+ offset + sizeof(u64),
+ sizeof(vx->runstate_times)))
+ return;
+
+ smp_wmb();
+
+ /*
+ * Finally, clear the XEN_RUNSTATE_UPDATE bit in the guest's
+ * runstate_entry_time field.
+ */
+
+ state_entry_time &= ~XEN_RUNSTATE_UPDATE;
+ if (kvm_write_guest_offset_cached(v->kvm, &v->arch.xen.runstate_cache,
+ &state_entry_time, offset,
+ sizeof(state_entry_time)))
+ return;
+}
+
int __kvm_xen_has_interrupt(struct kvm_vcpu *v)
{
u8 rc = 0;
/* No compat necessary here. */
BUILD_BUG_ON(sizeof(struct vcpu_info) !=
sizeof(struct compat_vcpu_info));
+ BUILD_BUG_ON(offsetof(struct vcpu_info, time) !=
+ offsetof(struct compat_vcpu_info, time));
if (data->u.gpa == GPA_INVALID) {
vcpu->arch.xen.vcpu_info_set = false;
+ r = 0;
break;
}
case KVM_XEN_VCPU_ATTR_TYPE_VCPU_TIME_INFO:
if (data->u.gpa == GPA_INVALID) {
vcpu->arch.xen.vcpu_time_info_set = false;
+ r = 0;
break;
}
}
break;
+ case KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_ADDR:
+ if (!sched_info_on()) {
+ r = -EOPNOTSUPP;
+ break;
+ }
+ if (data->u.gpa == GPA_INVALID) {
+ vcpu->arch.xen.runstate_set = false;
+ r = 0;
+ break;
+ }
+
+ r = kvm_gfn_to_hva_cache_init(vcpu->kvm,
+ &vcpu->arch.xen.runstate_cache,
+ data->u.gpa,
+ sizeof(struct vcpu_runstate_info));
+ if (!r) {
+ vcpu->arch.xen.runstate_set = true;
+ }
+ break;
+
+ case KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_CURRENT:
+ if (!sched_info_on()) {
+ r = -EOPNOTSUPP;
+ break;
+ }
+ if (data->u.runstate.state > RUNSTATE_offline) {
+ r = -EINVAL;
+ break;
+ }
+
+ kvm_xen_update_runstate(vcpu, data->u.runstate.state);
+ r = 0;
+ break;
+
+ case KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_DATA:
+ if (!sched_info_on()) {
+ r = -EOPNOTSUPP;
+ break;
+ }
+ if (data->u.runstate.state > RUNSTATE_offline) {
+ r = -EINVAL;
+ break;
+ }
+ if (data->u.runstate.state_entry_time !=
+ (data->u.runstate.time_running +
+ data->u.runstate.time_runnable +
+ data->u.runstate.time_blocked +
+ data->u.runstate.time_offline)) {
+ r = -EINVAL;
+ break;
+ }
+ if (get_kvmclock_ns(vcpu->kvm) <
+ data->u.runstate.state_entry_time) {
+ r = -EINVAL;
+ break;
+ }
+
+ vcpu->arch.xen.current_runstate = data->u.runstate.state;
+ vcpu->arch.xen.runstate_entry_time =
+ data->u.runstate.state_entry_time;
+ vcpu->arch.xen.runstate_times[RUNSTATE_running] =
+ data->u.runstate.time_running;
+ vcpu->arch.xen.runstate_times[RUNSTATE_runnable] =
+ data->u.runstate.time_runnable;
+ vcpu->arch.xen.runstate_times[RUNSTATE_blocked] =
+ data->u.runstate.time_blocked;
+ vcpu->arch.xen.runstate_times[RUNSTATE_offline] =
+ data->u.runstate.time_offline;
+ vcpu->arch.xen.last_steal = current->sched_info.run_delay;
+ r = 0;
+ break;
+
+ case KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_ADJUST:
+ if (!sched_info_on()) {
+ r = -EOPNOTSUPP;
+ break;
+ }
+ if (data->u.runstate.state > RUNSTATE_offline &&
+ data->u.runstate.state != (u64)-1) {
+ r = -EINVAL;
+ break;
+ }
+ /* The adjustment must add up */
+ if (data->u.runstate.state_entry_time !=
+ (data->u.runstate.time_running +
+ data->u.runstate.time_runnable +
+ data->u.runstate.time_blocked +
+ data->u.runstate.time_offline)) {
+ r = -EINVAL;
+ break;
+ }
+
+ if (get_kvmclock_ns(vcpu->kvm) <
+ (vcpu->arch.xen.runstate_entry_time +
+ data->u.runstate.state_entry_time)) {
+ r = -EINVAL;
+ break;
+ }
+
+ vcpu->arch.xen.runstate_entry_time +=
+ data->u.runstate.state_entry_time;
+ vcpu->arch.xen.runstate_times[RUNSTATE_running] +=
+ data->u.runstate.time_running;
+ vcpu->arch.xen.runstate_times[RUNSTATE_runnable] +=
+ data->u.runstate.time_runnable;
+ vcpu->arch.xen.runstate_times[RUNSTATE_blocked] +=
+ data->u.runstate.time_blocked;
+ vcpu->arch.xen.runstate_times[RUNSTATE_offline] +=
+ data->u.runstate.time_offline;
+
+ if (data->u.runstate.state <= RUNSTATE_offline)
+ kvm_xen_update_runstate(vcpu, data->u.runstate.state);
+ r = 0;
+ break;
+
default:
break;
}
r = 0;
break;
+ case KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_ADDR:
+ if (!sched_info_on()) {
+ r = -EOPNOTSUPP;
+ break;
+ }
+ if (vcpu->arch.xen.runstate_set) {
+ data->u.gpa = vcpu->arch.xen.runstate_cache.gpa;
+ r = 0;
+ }
+ break;
+
+ case KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_CURRENT:
+ if (!sched_info_on()) {
+ r = -EOPNOTSUPP;
+ break;
+ }
+ data->u.runstate.state = vcpu->arch.xen.current_runstate;
+ r = 0;
+ break;
+
+ case KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_DATA:
+ if (!sched_info_on()) {
+ r = -EOPNOTSUPP;
+ break;
+ }
+ data->u.runstate.state = vcpu->arch.xen.current_runstate;
+ data->u.runstate.state_entry_time =
+ vcpu->arch.xen.runstate_entry_time;
+ data->u.runstate.time_running =
+ vcpu->arch.xen.runstate_times[RUNSTATE_running];
+ data->u.runstate.time_runnable =
+ vcpu->arch.xen.runstate_times[RUNSTATE_runnable];
+ data->u.runstate.time_blocked =
+ vcpu->arch.xen.runstate_times[RUNSTATE_blocked];
+ data->u.runstate.time_offline =
+ vcpu->arch.xen.runstate_times[RUNSTATE_offline];
+ r = 0;
+ break;
+
+ case KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_ADJUST:
+ r = -EINVAL;
+ break;
+
default:
break;
}
#ifndef __ARCH_X86_KVM_XEN_H__
#define __ARCH_X86_KVM_XEN_H__
+#ifdef CONFIG_KVM_XEN
#include <linux/jump_label_ratelimit.h>
extern struct static_key_false_deferred kvm_xen_enabled;
int kvm_xen_vcpu_get_attr(struct kvm_vcpu *vcpu, struct kvm_xen_vcpu_attr *data);
int kvm_xen_hvm_set_attr(struct kvm *kvm, struct kvm_xen_hvm_attr *data);
int kvm_xen_hvm_get_attr(struct kvm *kvm, struct kvm_xen_hvm_attr *data);
-int kvm_xen_hypercall(struct kvm_vcpu *vcpu);
int kvm_xen_write_hypercall_page(struct kvm_vcpu *vcpu, u64 data);
int kvm_xen_hvm_config(struct kvm *kvm, struct kvm_xen_hvm_config *xhc);
void kvm_xen_destroy_vm(struct kvm *kvm);
+static inline bool kvm_xen_msr_enabled(struct kvm *kvm)
+{
+ return static_branch_unlikely(&kvm_xen_enabled.key) &&
+ kvm->arch.xen_hvm_config.msr;
+}
+
static inline bool kvm_xen_hypercall_enabled(struct kvm *kvm)
{
return static_branch_unlikely(&kvm_xen_enabled.key) &&
return 0;
}
+#else
+static inline int kvm_xen_write_hypercall_page(struct kvm_vcpu *vcpu, u64 data)
+{
+ return 1;
+}
+
+static inline void kvm_xen_destroy_vm(struct kvm *kvm)
+{
+}
+
+static inline bool kvm_xen_msr_enabled(struct kvm *kvm)
+{
+ return false;
+}
+
+static inline bool kvm_xen_hypercall_enabled(struct kvm *kvm)
+{
+ return false;
+}
+
+static inline int kvm_xen_has_interrupt(struct kvm_vcpu *vcpu)
+{
+ return 0;
+}
+#endif
+
+int kvm_xen_hypercall(struct kvm_vcpu *vcpu);
-/* 32-bit compatibility definitions, also used natively in 32-bit build */
#include <asm/pvclock-abi.h>
#include <asm/xen/interface.h>
+#include <xen/interface/vcpu.h>
+
+void kvm_xen_update_runstate_guest(struct kvm_vcpu *vcpu, int state);
+static inline void kvm_xen_runstate_set_running(struct kvm_vcpu *vcpu)
+{
+ kvm_xen_update_runstate_guest(vcpu, RUNSTATE_running);
+}
+
+static inline void kvm_xen_runstate_set_preempted(struct kvm_vcpu *vcpu)
+{
+ /*
+ * If the vCPU wasn't preempted but took a normal exit for
+ * some reason (hypercalls, I/O, etc.), that is accounted as
+ * still RUNSTATE_running, as the VMM is still operating on
+ * behalf of the vCPU. Only if the VMM does actually block
+ * does it need to enter RUNSTATE_blocked.
+ */
+ if (vcpu->preempted)
+ kvm_xen_update_runstate_guest(vcpu, RUNSTATE_runnable);
+}
+
+/* 32-bit compatibility definitions, also used natively in 32-bit build */
struct compat_arch_vcpu_info {
unsigned int cr2;
unsigned int pad[5];
struct compat_arch_shared_info arch;
};
+struct compat_vcpu_runstate_info {
+ int state;
+ uint64_t state_entry_time;
+ uint64_t time[4];
+} __attribute__((packed));
+
#endif /* __ARCH_X86_KVM_XEN_H__ */
#define KVM_XEN_HVM_CONFIG_HYPERCALL_MSR (1 << 0)
#define KVM_XEN_HVM_CONFIG_INTERCEPT_HCALL (1 << 1)
#define KVM_XEN_HVM_CONFIG_SHARED_INFO (1 << 2)
+#define KVM_XEN_HVM_CONFIG_RUNSTATE (1 << 3)
struct kvm_xen_hvm_config {
__u32 flags;
union {
__u64 gpa;
__u64 pad[8];
+ struct {
+ __u64 state;
+ __u64 state_entry_time;
+ __u64 time_running;
+ __u64 time_runnable;
+ __u64 time_blocked;
+ __u64 time_offline;
+ } runstate;
} u;
};
/* Available with KVM_CAP_XEN_HVM / KVM_XEN_HVM_CONFIG_SHARED_INFO */
#define KVM_XEN_VCPU_ATTR_TYPE_VCPU_INFO 0x0
#define KVM_XEN_VCPU_ATTR_TYPE_VCPU_TIME_INFO 0x1
+#define KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_ADDR 0x2
+#define KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_CURRENT 0x3
+#define KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_DATA 0x4
+#define KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_ADJUST 0x5
/* Secure Encrypted Virtualization command */
enum sev_cmd_id {
#define KVM_UTIL_PGS_PER_HUGEPG 512
#define KVM_UTIL_MIN_PFN 2
+static int vcpu_mmap_sz(void);
+
/* Aligns x up to the next multiple of size. Size must be a power of 2. */
static void *align(void *x, size_t size)
{
vcpu->dirty_gfns = NULL;
}
- ret = munmap(vcpu->state, sizeof(*vcpu->state));
+ ret = munmap(vcpu->state, vcpu_mmap_sz());
TEST_ASSERT(ret == 0, "munmap of VCPU fd failed, rc: %i "
"errno: %i", ret, errno);
close(vcpu->fd);
TEST_ASSERT(vcpu_mmap_sz() >= sizeof(*vcpu->state), "vcpu mmap size "
"smaller than expected, vcpu_mmap_sz: %i expected_min: %zi",
vcpu_mmap_sz(), sizeof(*vcpu->state));
- vcpu->state = (struct kvm_run *) mmap(NULL, sizeof(*vcpu->state),
+ vcpu->state = (struct kvm_run *) mmap(NULL, vcpu_mmap_sz(),
PROT_READ | PROT_WRITE, MAP_SHARED, vcpu->fd, 0);
TEST_ASSERT(vcpu->state != MAP_FAILED, "mmap vcpu_state failed, "
"vcpu id: %u errno: %i", vcpuid, errno);
#include <stdint.h>
#include <time.h>
+#include <sched.h>
+#include <sys/syscall.h>
#define VCPU_ID 5
+#define SHINFO_REGION_GVA 0xc0000000ULL
#define SHINFO_REGION_GPA 0xc0000000ULL
#define SHINFO_REGION_SLOT 10
#define PAGE_SIZE 4096
#define PVTIME_ADDR (SHINFO_REGION_GPA + PAGE_SIZE)
+#define RUNSTATE_ADDR (SHINFO_REGION_GPA + PAGE_SIZE + 0x20)
+
+#define RUNSTATE_VADDR (SHINFO_REGION_GVA + PAGE_SIZE + 0x20)
static struct kvm_vm *vm;
#define XEN_HYPERCALL_MSR 0x40000000
+#define MIN_STEAL_TIME 50000
+
struct pvclock_vcpu_time_info {
u32 version;
u32 pad0;
u32 nsec;
} __attribute__((__packed__));
+struct vcpu_runstate_info {
+ uint32_t state;
+ uint64_t state_entry_time;
+ uint64_t time[4];
+};
+
+#define RUNSTATE_running 0
+#define RUNSTATE_runnable 1
+#define RUNSTATE_blocked 2
+#define RUNSTATE_offline 3
+
static void guest_code(void)
{
+ struct vcpu_runstate_info *rs = (void *)RUNSTATE_VADDR;
+
+ /* Test having the host set runstates manually */
+ GUEST_SYNC(RUNSTATE_runnable);
+ GUEST_ASSERT(rs->time[RUNSTATE_runnable] != 0);
+ GUEST_ASSERT(rs->state == 0);
+
+ GUEST_SYNC(RUNSTATE_blocked);
+ GUEST_ASSERT(rs->time[RUNSTATE_blocked] != 0);
+ GUEST_ASSERT(rs->state == 0);
+
+ GUEST_SYNC(RUNSTATE_offline);
+ GUEST_ASSERT(rs->time[RUNSTATE_offline] != 0);
+ GUEST_ASSERT(rs->state == 0);
+
+ /* Test runstate time adjust */
+ GUEST_SYNC(4);
+ GUEST_ASSERT(rs->time[RUNSTATE_blocked] == 0x5a);
+ GUEST_ASSERT(rs->time[RUNSTATE_offline] == 0x6b6b);
+
+ /* Test runstate time set */
+ GUEST_SYNC(5);
+ GUEST_ASSERT(rs->state_entry_time >= 0x8000);
+ GUEST_ASSERT(rs->time[RUNSTATE_runnable] == 0);
+ GUEST_ASSERT(rs->time[RUNSTATE_blocked] == 0x6b6b);
+ GUEST_ASSERT(rs->time[RUNSTATE_offline] == 0x5a);
+
+ /* sched_yield() should result in some 'runnable' time */
+ GUEST_SYNC(6);
+ GUEST_ASSERT(rs->time[RUNSTATE_runnable] >= MIN_STEAL_TIME);
+
GUEST_DONE();
}
+static long get_run_delay(void)
+{
+ char path[64];
+ long val[2];
+ FILE *fp;
+
+ sprintf(path, "/proc/%ld/schedstat", syscall(SYS_gettid));
+ fp = fopen(path, "r");
+ fscanf(fp, "%ld %ld ", &val[0], &val[1]);
+ fclose(fp);
+
+ return val[1];
+}
+
static int cmp_timespec(struct timespec *a, struct timespec *b)
{
if (a->tv_sec > b->tv_sec)
{
struct timespec min_ts, max_ts, vm_ts;
- if (!(kvm_check_cap(KVM_CAP_XEN_HVM) &
- KVM_XEN_HVM_CONFIG_SHARED_INFO) ) {
+ int xen_caps = kvm_check_cap(KVM_CAP_XEN_HVM);
+ if (!(xen_caps & KVM_XEN_HVM_CONFIG_SHARED_INFO) ) {
print_skip("KVM_XEN_HVM_CONFIG_SHARED_INFO not available");
exit(KSFT_SKIP);
}
+ bool do_runstate_tests = !!(xen_caps & KVM_XEN_HVM_CONFIG_RUNSTATE);
+
clock_gettime(CLOCK_REALTIME, &min_ts);
vm = vm_create_default(VCPU_ID, 0, (void *) guest_code);
/* Map a region for the shared_info page */
vm_userspace_mem_region_add(vm, VM_MEM_SRC_ANONYMOUS,
SHINFO_REGION_GPA, SHINFO_REGION_SLOT, 2, 0);
+ virt_map(vm, SHINFO_REGION_GVA, SHINFO_REGION_GPA, 2, 0);
struct kvm_xen_hvm_config hvmc = {
.flags = KVM_XEN_HVM_CONFIG_INTERCEPT_HCALL,
};
vcpu_ioctl(vm, VCPU_ID, KVM_XEN_VCPU_SET_ATTR, &pvclock);
+ if (do_runstate_tests) {
+ struct kvm_xen_vcpu_attr st = {
+ .type = KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_ADDR,
+ .u.gpa = RUNSTATE_ADDR,
+ };
+ vcpu_ioctl(vm, VCPU_ID, KVM_XEN_VCPU_SET_ATTR, &st);
+ }
+
+ struct vcpu_runstate_info *rs = addr_gpa2hva(vm, RUNSTATE_ADDR);;
+ rs->state = 0x5a;
+
for (;;) {
volatile struct kvm_run *run = vcpu_state(vm, VCPU_ID);
struct ucall uc;
case UCALL_ABORT:
TEST_FAIL("%s", (const char *)uc.args[0]);
/* NOT REACHED */
- case UCALL_SYNC:
+ case UCALL_SYNC: {
+ struct kvm_xen_vcpu_attr rst;
+ long rundelay;
+
+ /* If no runstate support, bail out early */
+ if (!do_runstate_tests)
+ goto done;
+
+ TEST_ASSERT(rs->state_entry_time == rs->time[0] +
+ rs->time[1] + rs->time[2] + rs->time[3],
+ "runstate times don't add up");
+
+ switch (uc.args[1]) {
+ case RUNSTATE_running...RUNSTATE_offline:
+ rst.type = KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_CURRENT;
+ rst.u.runstate.state = uc.args[1];
+ vcpu_ioctl(vm, VCPU_ID, KVM_XEN_VCPU_SET_ATTR, &rst);
+ break;
+ case 4:
+ rst.type = KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_ADJUST;
+ memset(&rst.u, 0, sizeof(rst.u));
+ rst.u.runstate.state = (uint64_t)-1;
+ rst.u.runstate.time_blocked =
+ 0x5a - rs->time[RUNSTATE_blocked];
+ rst.u.runstate.time_offline =
+ 0x6b6b - rs->time[RUNSTATE_offline];
+ rst.u.runstate.time_runnable = -rst.u.runstate.time_blocked -
+ rst.u.runstate.time_offline;
+ vcpu_ioctl(vm, VCPU_ID, KVM_XEN_VCPU_SET_ATTR, &rst);
+ break;
+
+ case 5:
+ rst.type = KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_DATA;
+ memset(&rst.u, 0, sizeof(rst.u));
+ rst.u.runstate.state = RUNSTATE_running;
+ rst.u.runstate.state_entry_time = 0x6b6b + 0x5a;
+ rst.u.runstate.time_blocked = 0x6b6b;
+ rst.u.runstate.time_offline = 0x5a;
+ vcpu_ioctl(vm, VCPU_ID, KVM_XEN_VCPU_SET_ATTR, &rst);
+ break;
+ case 6:
+ /* Yield until scheduler delay exceeds target */
+ rundelay = get_run_delay() + MIN_STEAL_TIME;
+ do {
+ sched_yield();
+ } while (get_run_delay() < rundelay);
+ break;
+ }
break;
+ }
case UCALL_DONE:
goto done;
default:
TEST_ASSERT(ti2->version && !(ti2->version & 1),
"Bad time_info version %x", ti->version);
+ if (do_runstate_tests) {
+ /*
+ * Fetch runstate and check sanity. Strictly speaking in the
+ * general case we might not expect the numbers to be identical
+ * but in this case we know we aren't running the vCPU any more.
+ */
+ struct kvm_xen_vcpu_attr rst = {
+ .type = KVM_XEN_VCPU_ATTR_TYPE_RUNSTATE_DATA,
+ };
+ vcpu_ioctl(vm, VCPU_ID, KVM_XEN_VCPU_GET_ATTR, &rst);
+
+ TEST_ASSERT(rs->state == rst.u.runstate.state, "Runstate mismatch");
+ TEST_ASSERT(rs->state_entry_time == rst.u.runstate.state_entry_time,
+ "State entry time mismatch");
+ TEST_ASSERT(rs->time[RUNSTATE_running] == rst.u.runstate.time_running,
+ "Running time mismatch");
+ TEST_ASSERT(rs->time[RUNSTATE_runnable] == rst.u.runstate.time_runnable,
+ "Runnable time mismatch");
+ TEST_ASSERT(rs->time[RUNSTATE_blocked] == rst.u.runstate.time_blocked,
+ "Blocked time mismatch");
+ TEST_ASSERT(rs->time[RUNSTATE_offline] == rst.u.runstate.time_offline,
+ "Offline time mismatch");
+
+ TEST_ASSERT(rs->state_entry_time == rs->time[0] +
+ rs->time[1] + rs->time[2] + rs->time[3],
+ "runstate times don't add up");
+ }
kvm_vm_free(vm);
return 0;
}
projects / platform / kernel / linux-starfive.git / commitdiff