aboutsummaryrefslogtreecommitdiff
path: root/virt
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2019-03-15 15:00:28 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2019-03-15 15:00:28 -0700
commit636deed6c0bc137a7c4f4a97ae1fcf0ad75323da (patch)
tree7bd27189b8e30e3c1466f7730831a08db65f8646 /virt
parentaa2e3ac64ace127f403be85aa4d6015b859385f2 (diff)
parent4a605bc08e98381d8df61c30a4acb2eac15eb7da (diff)
downloadlinux-stericsson-636deed6c0bc137a7c4f4a97ae1fcf0ad75323da.tar.gz
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull KVM updates from Paolo Bonzini: "ARM: - some cleanups - direct physical timer assignment - cache sanitization for 32-bit guests s390: - interrupt cleanup - introduction of the Guest Information Block - preparation for processor subfunctions in cpu models PPC: - bug fixes and improvements, especially related to machine checks and protection keys x86: - many, many cleanups, including removing a bunch of MMU code for unnecessary optimizations - AVIC fixes Generic: - memcg accounting" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (147 commits) kvm: vmx: fix formatting of a comment KVM: doc: Document the life cycle of a VM and its resources MAINTAINERS: Add KVM selftests to existing KVM entry Revert "KVM/MMU: Flush tlb directly in the kvm_zap_gfn_range()" KVM: PPC: Book3S: Add count cache flush parameters to kvmppc_get_cpu_char() KVM: PPC: Fix compilation when KVM is not enabled KVM: Minor cleanups for kvm_main.c KVM: s390: add debug logging for cpu model subfunctions KVM: s390: implement subfunction processor calls arm64: KVM: Fix architecturally invalid reset value for FPEXC32_EL2 KVM: arm/arm64: Remove unused timer variable KVM: PPC: Book3S: Improve KVM reference counting KVM: PPC: Book3S HV: Fix build failure without IOMMU support Revert "KVM: Eliminate extra function calls in kvm_get_dirty_log_protect()" x86: kvmguest: use TSC clocksource if invariant TSC is exposed KVM: Never start grow vCPU halt_poll_ns from value below halt_poll_ns_grow_start KVM: Expose the initial start value in grow_halt_poll_ns() as a module parameter KVM: grow_halt_poll_ns() should never shrink vCPU halt_poll_ns KVM: x86/mmu: Consolidate kvm_mmu_zap_all() and kvm_mmu_zap_mmio_sptes() KVM: x86/mmu: WARN if zapping a MMIO spte results in zapping children ...
Diffstat (limited to 'virt')
-rw-r--r--virt/kvm/arm/arch_timer.c608
-rw-r--r--virt/kvm/arm/arm.c64
-rw-r--r--virt/kvm/arm/hyp/vgic-v3-sr.c2
-rw-r--r--virt/kvm/arm/mmu.c20
-rw-r--r--virt/kvm/arm/trace.h107
-rw-r--r--virt/kvm/arm/vgic/vgic-v3.c4
-rw-r--r--virt/kvm/coalesced_mmio.c3
-rw-r--r--virt/kvm/eventfd.c7
-rw-r--r--virt/kvm/irqchip.c4
-rw-r--r--virt/kvm/kvm_main.c103
-rw-r--r--virt/kvm/vfio.c4
11 files changed, 631 insertions, 295 deletions
diff --git a/virt/kvm/arm/arch_timer.c b/virt/kvm/arm/arch_timer.c
index b07ac4614e1c..3417f2dbc366 100644
--- a/virt/kvm/arm/arch_timer.c
+++ b/virt/kvm/arm/arch_timer.c
@@ -25,6 +25,7 @@
#include <clocksource/arm_arch_timer.h>
#include <asm/arch_timer.h>
+#include <asm/kvm_emulate.h>
#include <asm/kvm_hyp.h>
#include <kvm/arm_vgic.h>
@@ -34,7 +35,9 @@
static struct timecounter *timecounter;
static unsigned int host_vtimer_irq;
+static unsigned int host_ptimer_irq;
static u32 host_vtimer_irq_flags;
+static u32 host_ptimer_irq_flags;
static DEFINE_STATIC_KEY_FALSE(has_gic_active_state);
@@ -52,12 +55,34 @@ static bool kvm_timer_irq_can_fire(struct arch_timer_context *timer_ctx);
static void kvm_timer_update_irq(struct kvm_vcpu *vcpu, bool new_level,
struct arch_timer_context *timer_ctx);
static bool kvm_timer_should_fire(struct arch_timer_context *timer_ctx);
+static void kvm_arm_timer_write(struct kvm_vcpu *vcpu,
+ struct arch_timer_context *timer,
+ enum kvm_arch_timer_regs treg,
+ u64 val);
+static u64 kvm_arm_timer_read(struct kvm_vcpu *vcpu,
+ struct arch_timer_context *timer,
+ enum kvm_arch_timer_regs treg);
u64 kvm_phys_timer_read(void)
{
return timecounter->cc->read(timecounter->cc);
}
+static void get_timer_map(struct kvm_vcpu *vcpu, struct timer_map *map)
+{
+ if (has_vhe()) {
+ map->direct_vtimer = vcpu_vtimer(vcpu);
+ map->direct_ptimer = vcpu_ptimer(vcpu);
+ map->emul_ptimer = NULL;
+ } else {
+ map->direct_vtimer = vcpu_vtimer(vcpu);
+ map->direct_ptimer = NULL;
+ map->emul_ptimer = vcpu_ptimer(vcpu);
+ }
+
+ trace_kvm_get_timer_map(vcpu->vcpu_id, map);
+}
+
static inline bool userspace_irqchip(struct kvm *kvm)
{
return static_branch_unlikely(&userspace_irqchip_in_use) &&
@@ -78,20 +103,27 @@ static void soft_timer_cancel(struct hrtimer *hrt)
static irqreturn_t kvm_arch_timer_handler(int irq, void *dev_id)
{
struct kvm_vcpu *vcpu = *(struct kvm_vcpu **)dev_id;
- struct arch_timer_context *vtimer;
+ struct arch_timer_context *ctx;
+ struct timer_map map;
/*
* We may see a timer interrupt after vcpu_put() has been called which
* sets the CPU's vcpu pointer to NULL, because even though the timer
- * has been disabled in vtimer_save_state(), the hardware interrupt
+ * has been disabled in timer_save_state(), the hardware interrupt
* signal may not have been retired from the interrupt controller yet.
*/
if (!vcpu)
return IRQ_HANDLED;
- vtimer = vcpu_vtimer(vcpu);
- if (kvm_timer_should_fire(vtimer))
- kvm_timer_update_irq(vcpu, true, vtimer);
+ get_timer_map(vcpu, &map);
+
+ if (irq == host_vtimer_irq)
+ ctx = map.direct_vtimer;
+ else
+ ctx = map.direct_ptimer;
+
+ if (kvm_timer_should_fire(ctx))
+ kvm_timer_update_irq(vcpu, true, ctx);
if (userspace_irqchip(vcpu->kvm) &&
!static_branch_unlikely(&has_gic_active_state))
@@ -122,7 +154,9 @@ static u64 kvm_timer_compute_delta(struct arch_timer_context *timer_ctx)
static bool kvm_timer_irq_can_fire(struct arch_timer_context *timer_ctx)
{
- return !(timer_ctx->cnt_ctl & ARCH_TIMER_CTRL_IT_MASK) &&
+ WARN_ON(timer_ctx && timer_ctx->loaded);
+ return timer_ctx &&
+ !(timer_ctx->cnt_ctl & ARCH_TIMER_CTRL_IT_MASK) &&
(timer_ctx->cnt_ctl & ARCH_TIMER_CTRL_ENABLE);
}
@@ -132,21 +166,22 @@ static bool kvm_timer_irq_can_fire(struct arch_timer_context *timer_ctx)
*/
static u64 kvm_timer_earliest_exp(struct kvm_vcpu *vcpu)
{
- u64 min_virt = ULLONG_MAX, min_phys = ULLONG_MAX;
- struct arch_timer_context *vtimer = vcpu_vtimer(vcpu);
- struct arch_timer_context *ptimer = vcpu_ptimer(vcpu);
+ u64 min_delta = ULLONG_MAX;
+ int i;
- if (kvm_timer_irq_can_fire(vtimer))
- min_virt = kvm_timer_compute_delta(vtimer);
+ for (i = 0; i < NR_KVM_TIMERS; i++) {
+ struct arch_timer_context *ctx = &vcpu->arch.timer_cpu.timers[i];
- if (kvm_timer_irq_can_fire(ptimer))
- min_phys = kvm_timer_compute_delta(ptimer);
+ WARN(ctx->loaded, "timer %d loaded\n", i);
+ if (kvm_timer_irq_can_fire(ctx))
+ min_delta = min(min_delta, kvm_timer_compute_delta(ctx));
+ }
/* If none of timers can fire, then return 0 */
- if ((min_virt == ULLONG_MAX) && (min_phys == ULLONG_MAX))
+ if (min_delta == ULLONG_MAX)
return 0;
- return min(min_virt, min_phys);
+ return min_delta;
}
static enum hrtimer_restart kvm_bg_timer_expire(struct hrtimer *hrt)
@@ -173,41 +208,58 @@ static enum hrtimer_restart kvm_bg_timer_expire(struct hrtimer *hrt)
return HRTIMER_NORESTART;
}
-static enum hrtimer_restart kvm_phys_timer_expire(struct hrtimer *hrt)
+static enum hrtimer_restart kvm_hrtimer_expire(struct hrtimer *hrt)
{
- struct arch_timer_context *ptimer;
- struct arch_timer_cpu *timer;
+ struct arch_timer_context *ctx;
struct kvm_vcpu *vcpu;
u64 ns;
- timer = container_of(hrt, struct arch_timer_cpu, phys_timer);
- vcpu = container_of(timer, struct kvm_vcpu, arch.timer_cpu);
- ptimer = vcpu_ptimer(vcpu);
+ ctx = container_of(hrt, struct arch_timer_context, hrtimer);
+ vcpu = ctx->vcpu;
+
+ trace_kvm_timer_hrtimer_expire(ctx);
/*
* Check that the timer has really expired from the guest's
* PoV (NTP on the host may have forced it to expire
* early). If not ready, schedule for a later time.
*/
- ns = kvm_timer_compute_delta(ptimer);
+ ns = kvm_timer_compute_delta(ctx);
if (unlikely(ns)) {
hrtimer_forward_now(hrt, ns_to_ktime(ns));
return HRTIMER_RESTART;
}
- kvm_timer_update_irq(vcpu, true, ptimer);
+ kvm_timer_update_irq(vcpu, true, ctx);
return HRTIMER_NORESTART;
}
static bool kvm_timer_should_fire(struct arch_timer_context *timer_ctx)
{
+ enum kvm_arch_timers index;
u64 cval, now;
+ if (!timer_ctx)
+ return false;
+
+ index = arch_timer_ctx_index(timer_ctx);
+
if (timer_ctx->loaded) {
- u32 cnt_ctl;
+ u32 cnt_ctl = 0;
+
+ switch (index) {
+ case TIMER_VTIMER:
+ cnt_ctl = read_sysreg_el0(cntv_ctl);
+ break;
+ case TIMER_PTIMER:
+ cnt_ctl = read_sysreg_el0(cntp_ctl);
+ break;
+ case NR_KVM_TIMERS:
+ /* GCC is braindead */
+ cnt_ctl = 0;
+ break;
+ }
- /* Only the virtual timer can be loaded so far */
- cnt_ctl = read_sysreg_el0(cntv_ctl);
return (cnt_ctl & ARCH_TIMER_CTRL_ENABLE) &&
(cnt_ctl & ARCH_TIMER_CTRL_IT_STAT) &&
!(cnt_ctl & ARCH_TIMER_CTRL_IT_MASK);
@@ -224,13 +276,13 @@ static bool kvm_timer_should_fire(struct arch_timer_context *timer_ctx)
bool kvm_timer_is_pending(struct kvm_vcpu *vcpu)
{
- struct arch_timer_context *vtimer = vcpu_vtimer(vcpu);
- struct arch_timer_context *ptimer = vcpu_ptimer(vcpu);
+ struct timer_map map;
- if (kvm_timer_should_fire(vtimer))
- return true;
+ get_timer_map(vcpu, &map);
- return kvm_timer_should_fire(ptimer);
+ return kvm_timer_should_fire(map.direct_vtimer) ||
+ kvm_timer_should_fire(map.direct_ptimer) ||
+ kvm_timer_should_fire(map.emul_ptimer);
}
/*
@@ -269,77 +321,70 @@ static void kvm_timer_update_irq(struct kvm_vcpu *vcpu, bool new_level,
}
}
-/* Schedule the background timer for the emulated timer. */
-static void phys_timer_emulate(struct kvm_vcpu *vcpu)
+static void timer_emulate(struct arch_timer_context *ctx)
{
- struct arch_timer_cpu *timer = &vcpu->arch.timer_cpu;
- struct arch_timer_context *ptimer = vcpu_ptimer(vcpu);
+ bool should_fire = kvm_timer_should_fire(ctx);
+
+ trace_kvm_timer_emulate(ctx, should_fire);
+
+ if (should_fire) {
+ kvm_timer_update_irq(ctx->vcpu, true, ctx);
+ return;
+ }
/*
* 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);
+ if (!kvm_timer_irq_can_fire(ctx)) {
+ soft_timer_cancel(&ctx->hrtimer);
return;
}
- soft_timer_start(&timer->phys_timer, kvm_timer_compute_delta(ptimer));
+ soft_timer_start(&ctx->hrtimer, kvm_timer_compute_delta(ctx));
}
-/*
- * Check if there was a change in the timer state, so that we should either
- * raise or lower the line level to the GIC or schedule a background timer to
- * emulate the physical timer.
- */
-static void kvm_timer_update_state(struct kvm_vcpu *vcpu)
+static void timer_save_state(struct arch_timer_context *ctx)
{
- 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);
- bool level;
+ struct arch_timer_cpu *timer = vcpu_timer(ctx->vcpu);
+ enum kvm_arch_timers index = arch_timer_ctx_index(ctx);
+ unsigned long flags;
- if (unlikely(!timer->enabled))
+ if (!timer->enabled)
return;
- /*
- * The vtimer virtual interrupt is a 'mapped' interrupt, meaning part
- * of its lifecycle is offloaded to the hardware, and we therefore may
- * not have lowered the irq.level value before having to signal a new
- * interrupt, but have to signal an interrupt every time the level is
- * asserted.
- */
- level = kvm_timer_should_fire(vtimer);
- kvm_timer_update_irq(vcpu, level, vtimer);
+ local_irq_save(flags);
- phys_timer_emulate(vcpu);
+ if (!ctx->loaded)
+ goto out;
- if (kvm_timer_should_fire(ptimer) != ptimer->irq.level)
- kvm_timer_update_irq(vcpu, !ptimer->irq.level, ptimer);
-}
+ switch (index) {
+ case TIMER_VTIMER:
+ ctx->cnt_ctl = read_sysreg_el0(cntv_ctl);
+ ctx->cnt_cval = read_sysreg_el0(cntv_cval);
-static void vtimer_save_state(struct kvm_vcpu *vcpu)
-{
- struct arch_timer_cpu *timer = &vcpu->arch.timer_cpu;
- struct arch_timer_context *vtimer = vcpu_vtimer(vcpu);
- unsigned long flags;
+ /* Disable the timer */
+ write_sysreg_el0(0, cntv_ctl);
+ isb();
- local_irq_save(flags);
+ break;
+ case TIMER_PTIMER:
+ ctx->cnt_ctl = read_sysreg_el0(cntp_ctl);
+ ctx->cnt_cval = read_sysreg_el0(cntp_cval);
- if (!vtimer->loaded)
- goto out;
+ /* Disable the timer */
+ write_sysreg_el0(0, cntp_ctl);
+ isb();
- if (timer->enabled) {
- vtimer->cnt_ctl = read_sysreg_el0(cntv_ctl);
- vtimer->cnt_cval = read_sysreg_el0(cntv_cval);
+ break;
+ case NR_KVM_TIMERS:
+ BUG();
}
- /* Disable the virtual timer */
- write_sysreg_el0(0, cntv_ctl);
- isb();
+ trace_kvm_timer_save_state(ctx);
- vtimer->loaded = false;
+ ctx->loaded = false;
out:
local_irq_restore(flags);
}
@@ -349,67 +394,72 @@ out:
* thread is removed from its waitqueue and made runnable when there's a timer
* interrupt to handle.
*/
-void kvm_timer_schedule(struct kvm_vcpu *vcpu)
+static void kvm_timer_blocking(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);
-
- vtimer_save_state(vcpu);
+ struct arch_timer_cpu *timer = vcpu_timer(vcpu);
+ struct timer_map map;
- /*
- * No need to schedule a background timer if any guest timer has
- * already expired, because kvm_vcpu_block will return before putting
- * the thread to sleep.
- */
- if (kvm_timer_should_fire(vtimer) || kvm_timer_should_fire(ptimer))
- return;
+ get_timer_map(vcpu, &map);
/*
- * If both timers are not capable of raising interrupts (disabled or
+ * If no timers are capable of raising interrupts (disabled or
* masked), then there's no more work for us to do.
*/
- if (!kvm_timer_irq_can_fire(vtimer) && !kvm_timer_irq_can_fire(ptimer))
+ if (!kvm_timer_irq_can_fire(map.direct_vtimer) &&
+ !kvm_timer_irq_can_fire(map.direct_ptimer) &&
+ !kvm_timer_irq_can_fire(map.emul_ptimer))
return;
/*
- * The guest timers have not yet expired, schedule a background timer.
+ * At least one guest time will expire. Schedule a background timer.
* Set the earliest expiration time among the guest timers.
*/
soft_timer_start(&timer->bg_timer, kvm_timer_earliest_exp(vcpu));
}
-static void vtimer_restore_state(struct kvm_vcpu *vcpu)
+static void kvm_timer_unblocking(struct kvm_vcpu *vcpu)
{
- struct arch_timer_cpu *timer = &vcpu->arch.timer_cpu;
- struct arch_timer_context *vtimer = vcpu_vtimer(vcpu);
+ struct arch_timer_cpu *timer = vcpu_timer(vcpu);
+
+ soft_timer_cancel(&timer->bg_timer);
+}
+
+static void timer_restore_state(struct arch_timer_context *ctx)
+{
+ struct arch_timer_cpu *timer = vcpu_timer(ctx->vcpu);
+ enum kvm_arch_timers index = arch_timer_ctx_index(ctx);
unsigned long flags;
+ if (!timer->enabled)
+ return;
+
local_irq_save(flags);
- if (vtimer->loaded)
+ if (ctx->loaded)
goto out;
- if (timer->enabled) {
- write_sysreg_el0(vtimer->cnt_cval, cntv_cval);
+ switch (index) {
+ case TIMER_VTIMER:
+ write_sysreg_el0(ctx->cnt_cval, cntv_cval);
isb();
- write_sysreg_el0(vtimer->cnt_ctl, cntv_ctl);
+ write_sysreg_el0(ctx->cnt_ctl, cntv_ctl);
+ break;
+ case TIMER_PTIMER:
+ write_sysreg_el0(ctx->cnt_cval, cntp_cval);
+ isb();
+ write_sysreg_el0(ctx->cnt_ctl, cntp_ctl);
+ break;
+ case NR_KVM_TIMERS:
+ BUG();
}
- vtimer->loaded = true;
+ trace_kvm_timer_restore_state(ctx);
+
+ ctx->loaded = true;
out:
local_irq_restore(flags);
}
-void kvm_timer_unschedule(struct kvm_vcpu *vcpu)
-{
- struct arch_timer_cpu *timer = &vcpu->arch.timer_cpu;
-
- vtimer_restore_state(vcpu);
-
- soft_timer_cancel(&timer->bg_timer);
-}
-
static void set_cntvoff(u64 cntvoff)
{
u32 low = lower_32_bits(cntvoff);
@@ -425,23 +475,32 @@ static void set_cntvoff(u64 cntvoff)
kvm_call_hyp(__kvm_timer_set_cntvoff, low, high);
}
-static inline void set_vtimer_irq_phys_active(struct kvm_vcpu *vcpu, bool active)
+static inline void set_timer_irq_phys_active(struct arch_timer_context *ctx, bool active)
{
int r;
- r = irq_set_irqchip_state(host_vtimer_irq, IRQCHIP_STATE_ACTIVE, active);
+ r = irq_set_irqchip_state(ctx->host_timer_irq, IRQCHIP_STATE_ACTIVE, active);
WARN_ON(r);
}
-static void kvm_timer_vcpu_load_gic(struct kvm_vcpu *vcpu)
+static void kvm_timer_vcpu_load_gic(struct arch_timer_context *ctx)
{
- struct arch_timer_context *vtimer = vcpu_vtimer(vcpu);
- bool phys_active;
+ struct kvm_vcpu *vcpu = ctx->vcpu;
+ bool phys_active = false;
+
+ /*
+ * Update the timer output so that it is likely to match the
+ * state we're about to restore. If the timer expires between
+ * this point and the register restoration, we'll take the
+ * interrupt anyway.
+ */
+ kvm_timer_update_irq(ctx->vcpu, kvm_timer_should_fire(ctx), ctx);
if (irqchip_in_kernel(vcpu->kvm))
- phys_active = kvm_vgic_map_is_active(vcpu, vtimer->irq.irq);
- else
- phys_active = vtimer->irq.level;
- set_vtimer_irq_phys_active(vcpu, phys_active);
+ phys_active = kvm_vgic_map_is_active(vcpu, ctx->irq.irq);
+
+ phys_active |= ctx->irq.level;
+
+ set_timer_irq_phys_active(ctx, phys_active);
}
static void kvm_timer_vcpu_load_nogic(struct kvm_vcpu *vcpu)
@@ -466,28 +525,32 @@ static void kvm_timer_vcpu_load_nogic(struct kvm_vcpu *vcpu)
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);
+ struct arch_timer_cpu *timer = vcpu_timer(vcpu);
+ struct timer_map map;
if (unlikely(!timer->enabled))
return;
- if (static_branch_likely(&has_gic_active_state))
- kvm_timer_vcpu_load_gic(vcpu);
- else
+ get_timer_map(vcpu, &map);
+
+ if (static_branch_likely(&has_gic_active_state)) {
+ kvm_timer_vcpu_load_gic(map.direct_vtimer);
+ if (map.direct_ptimer)
+ kvm_timer_vcpu_load_gic(map.direct_ptimer);
+ } else {
kvm_timer_vcpu_load_nogic(vcpu);
+ }
- set_cntvoff(vtimer->cntvoff);
+ set_cntvoff(map.direct_vtimer->cntvoff);
- vtimer_restore_state(vcpu);
+ kvm_timer_unblocking(vcpu);
- /* Set the background timer for the physical timer emulation. */
- phys_timer_emulate(vcpu);
+ timer_restore_state(map.direct_vtimer);
+ if (map.direct_ptimer)
+ timer_restore_state(map.direct_ptimer);
- /* 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);
+ if (map.emul_ptimer)
+ timer_emulate(map.emul_ptimer);
}
bool kvm_timer_should_notify_user(struct kvm_vcpu *vcpu)
@@ -509,15 +572,20 @@ bool kvm_timer_should_notify_user(struct kvm_vcpu *vcpu)
void kvm_timer_vcpu_put(struct kvm_vcpu *vcpu)
{
- struct arch_timer_cpu *timer = &vcpu->arch.timer_cpu;
+ struct arch_timer_cpu *timer = vcpu_timer(vcpu);
+ struct timer_map map;
if (unlikely(!timer->enabled))
return;
- vtimer_save_state(vcpu);
+ get_timer_map(vcpu, &map);
+
+ timer_save_state(map.direct_vtimer);
+ if (map.direct_ptimer)
+ timer_save_state(map.direct_ptimer);
/*
- * Cancel the physical timer emulation, because the only case where we
+ * Cancel soft timer emulation, because the only case where we
* need it after a vcpu_put is in the context of a sleeping VCPU, and
* in that case we already factor in the deadline for the physical
* timer when scheduling the bg_timer.
@@ -525,7 +593,11 @@ void kvm_timer_vcpu_put(struct kvm_vcpu *vcpu)
* In any case, we re-schedule the hrtimer for the physical timer when
* coming back to the VCPU thread in kvm_timer_vcpu_load().
*/
- soft_timer_cancel(&timer->phys_timer);
+ if (map.emul_ptimer)
+ soft_timer_cancel(&map.emul_ptimer->hrtimer);
+
+ if (swait_active(kvm_arch_vcpu_wq(vcpu)))
+ kvm_timer_blocking(vcpu);
/*
* The kernel may decide to run userspace after calling vcpu_put, so
@@ -534,8 +606,7 @@ void kvm_timer_vcpu_put(struct kvm_vcpu *vcpu)
* counter of non-VHE case. For VHE, the virtual counter uses a fixed
* virtual offset of zero, so no need to zero CNTVOFF_EL2 register.
*/
- if (!has_vhe())
- set_cntvoff(0);
+ set_cntvoff(0);
}
/*
@@ -550,7 +621,7 @@ static void unmask_vtimer_irq_user(struct kvm_vcpu *vcpu)
if (!kvm_timer_should_fire(vtimer)) {
kvm_timer_update_irq(vcpu, false, vtimer);
if (static_branch_likely(&has_gic_active_state))
- set_vtimer_irq_phys_active(vcpu, false);
+ set_timer_irq_phys_active(vtimer, false);
else
enable_percpu_irq(host_vtimer_irq, host_vtimer_irq_flags);
}
@@ -558,7 +629,7 @@ static void unmask_vtimer_irq_user(struct kvm_vcpu *vcpu)
void kvm_timer_sync_hwstate(struct kvm_vcpu *vcpu)
{
- struct arch_timer_cpu *timer = &vcpu->arch.timer_cpu;
+ struct arch_timer_cpu *timer = vcpu_timer(vcpu);
if (unlikely(!timer->enabled))
return;
@@ -569,9 +640,10 @@ void kvm_timer_sync_hwstate(struct kvm_vcpu *vcpu)
int kvm_timer_vcpu_reset(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);
+ struct arch_timer_cpu *timer = vcpu_timer(vcpu);
+ struct timer_map map;
+
+ get_timer_map(vcpu, &map);
/*
* The bits in CNTV_CTL are architecturally reset to UNKNOWN for ARMv8
@@ -579,12 +651,22 @@ int kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu)
* resets the timer to be disabled and unmasked and is compliant with
* the ARMv7 architecture.
*/
- vtimer->cnt_ctl = 0;
- ptimer->cnt_ctl = 0;
- kvm_timer_update_state(vcpu);
+ vcpu_vtimer(vcpu)->cnt_ctl = 0;
+ vcpu_ptimer(vcpu)->cnt_ctl = 0;
- if (timer->enabled && irqchip_in_kernel(vcpu->kvm))
- kvm_vgic_reset_mapped_irq(vcpu, vtimer->irq.irq);
+ if (timer->enabled) {
+ kvm_timer_update_irq(vcpu, false, vcpu_vtimer(vcpu));
+ kvm_timer_update_irq(vcpu, false, vcpu_ptimer(vcpu));
+
+ if (irqchip_in_kernel(vcpu->kvm)) {
+ kvm_vgic_reset_mapped_irq(vcpu, map.direct_vtimer->irq.irq);
+ if (map.direct_ptimer)
+ kvm_vgic_reset_mapped_irq(vcpu, map.direct_ptimer->irq.irq);
+ }
+ }
+
+ if (map.emul_ptimer)
+ soft_timer_cancel(&map.emul_ptimer->hrtimer);
return 0;
}
@@ -610,56 +692,76 @@ static void update_vtimer_cntvoff(struct kvm_vcpu *vcpu, u64 cntvoff)
void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu)
{
- struct arch_timer_cpu *timer = &vcpu->arch.timer_cpu;
+ struct arch_timer_cpu *timer = vcpu_timer(vcpu);
struct arch_timer_context *vtimer = vcpu_vtimer(vcpu);
struct arch_timer_context *ptimer = vcpu_ptimer(vcpu);
/* Synchronize cntvoff across all vtimers of a VM. */
update_vtimer_cntvoff(vcpu, kvm_phys_timer_read());
- vcpu_ptimer(vcpu)->cntvoff = 0;
+ ptimer->cntvoff = 0;
hrtimer_init(&timer->bg_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
timer->bg_timer.function = kvm_bg_timer_expire;
- hrtimer_init(&timer->phys_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
- timer->phys_timer.function = kvm_phys_timer_expire;
+ hrtimer_init(&vtimer->hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
+ hrtimer_init(&ptimer->hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
+ vtimer->hrtimer.function = kvm_hrtimer_expire;
+ ptimer->hrtimer.function = kvm_hrtimer_expire;
vtimer->irq.irq = default_vtimer_irq.irq;
ptimer->irq.irq = default_ptimer_irq.irq;
+
+ vtimer->host_timer_irq = host_vtimer_irq;
+ ptimer->host_timer_irq = host_ptimer_irq;
+
+ vtimer->host_timer_irq_flags = host_vtimer_irq_flags;
+ ptimer->host_timer_irq_flags = host_ptimer_irq_flags;
+
+ vtimer->vcpu = vcpu;
+ ptimer->vcpu = vcpu;
}
static void kvm_timer_init_interrupt(void *info)
{
enable_percpu_irq(host_vtimer_irq, host_vtimer_irq_flags);
+ enable_percpu_irq(host_ptimer_irq, host_ptimer_irq_flags);
}
int kvm_arm_timer_set_reg(struct kvm_vcpu *vcpu, u64 regid, u64 value)
{
- struct arch_timer_context *vtimer = vcpu_vtimer(vcpu);
- struct arch_timer_context *ptimer = vcpu_ptimer(vcpu);
+ struct arch_timer_context *timer;
+ bool level;
switch (regid) {
case KVM_REG_ARM_TIMER_CTL:
- vtimer->cnt_ctl = value & ~ARCH_TIMER_CTRL_IT_STAT;
+ timer = vcpu_vtimer(vcpu);
+ kvm_arm_timer_write(vcpu, timer, TIMER_REG_CTL, value);
break;
case KVM_REG_ARM_TIMER_CNT:
+ timer = vcpu_vtimer(vcpu);
update_vtimer_cntvoff(vcpu, kvm_phys_timer_read() - value);
break;
case KVM_REG_ARM_TIMER_CVAL:
- vtimer->cnt_cval = value;
+ timer = vcpu_vtimer(vcpu);
+ kvm_arm_timer_write(vcpu, timer, TIMER_REG_CVAL, value);
break;
case KVM_REG_ARM_PTIMER_CTL:
- ptimer->cnt_ctl = value & ~ARCH_TIMER_CTRL_IT_STAT;
+ timer = vcpu_ptimer(vcpu);
+ kvm_arm_timer_write(vcpu, timer, TIMER_REG_CTL, value);
break;
case KVM_REG_ARM_PTIMER_CVAL:
- ptimer->cnt_cval = value;
+ timer = vcpu_ptimer(vcpu);
+ kvm_arm_timer_write(vcpu, timer, TIMER_REG_CVAL, value);
break;
default:
return -1;
}
- kvm_timer_update_state(vcpu);
+ level = kvm_timer_should_fire(timer);
+ kvm_timer_update_irq(vcpu, level, timer);
+ timer_emulate(timer);
+
return 0;
}
@@ -679,26 +781,113 @@ static u64 read_timer_ctl(struct arch_timer_context *timer)
u64 kvm_arm_timer_get_reg(struct kvm_vcpu *vcpu, u64 regid)
{
- struct arch_timer_context *ptimer = vcpu_ptimer(vcpu);
- struct arch_timer_context *vtimer = vcpu_vtimer(vcpu);
-
switch (regid) {
case KVM_REG_ARM_TIMER_CTL:
- return read_timer_ctl(vtimer);
+ return kvm_arm_timer_read(vcpu,
+ vcpu_vtimer(vcpu), TIMER_REG_CTL);
case KVM_REG_ARM_TIMER_CNT:
- return kvm_phys_timer_read() - vtimer->cntvoff;
+ return kvm_arm_timer_read(vcpu,
+ vcpu_vtimer(vcpu), TIMER_REG_CNT);
case KVM_REG_ARM_TIMER_CVAL:
- return vtimer->cnt_cval;
+ return kvm_arm_timer_read(vcpu,
+ vcpu_vtimer(vcpu), TIMER_REG_CVAL);
case KVM_REG_ARM_PTIMER_CTL:
- return read_timer_ctl(ptimer);
- case KVM_REG_ARM_PTIMER_CVAL:
- return ptimer->cnt_cval;
+ return kvm_arm_timer_read(vcpu,
+ vcpu_ptimer(vcpu), TIMER_REG_CTL);
case KVM_REG_ARM_PTIMER_CNT:
- return kvm_phys_timer_read();
+ return kvm_arm_timer_read(vcpu,
+ vcpu_vtimer(vcpu), TIMER_REG_CNT);
+ case KVM_REG_ARM_PTIMER_CVAL:
+ return kvm_arm_timer_read(vcpu,
+ vcpu_ptimer(vcpu), TIMER_REG_CVAL);
}
return (u64)-1;
}
+static u64 kvm_arm_timer_read(struct kvm_vcpu *vcpu,
+ struct arch_timer_context *timer,
+ enum kvm_arch_timer_regs treg)
+{
+ u64 val;
+
+ switch (treg) {
+ case TIMER_REG_TVAL:
+ val = kvm_phys_timer_read() - timer->cntvoff - timer->cnt_cval;
+ break;
+
+ case TIMER_REG_CTL:
+ val = read_timer_ctl(timer);
+ break;
+
+ case TIMER_REG_CVAL:
+ val = timer->cnt_cval;
+ break;
+
+ case TIMER_REG_CNT:
+ val = kvm_phys_timer_read() - timer->cntvoff;
+ break;
+
+ default:
+ BUG();
+ }
+
+ return val;
+}
+
+u64 kvm_arm_timer_read_sysreg(struct kvm_vcpu *vcpu,
+ enum kvm_arch_timers tmr,
+ enum kvm_arch_timer_regs treg)
+{
+ u64 val;
+
+ preempt_disable();
+ kvm_timer_vcpu_put(vcpu);
+
+ val = kvm_arm_timer_read(vcpu, vcpu_get_timer(vcpu, tmr), treg);
+
+ kvm_timer_vcpu_load(vcpu);
+ preempt_enable();
+
+ return val;
+}
+
+static void kvm_arm_timer_write(struct kvm_vcpu *vcpu,
+ struct arch_timer_context *timer,
+ enum kvm_arch_timer_regs treg,
+ u64 val)
+{
+ switch (treg) {
+ case TIMER_REG_TVAL:
+ timer->cnt_cval = val - kvm_phys_timer_read() - timer->cntvoff;
+ break;
+
+ case TIMER_REG_CTL:
+ timer->cnt_ctl = val & ~ARCH_TIMER_CTRL_IT_STAT;
+ break;
+
+ case TIMER_REG_CVAL:
+ timer->cnt_cval = val;
+ break;
+
+ default:
+ BUG();
+ }
+}
+
+void kvm_arm_timer_write_sysreg(struct kvm_vcpu *vcpu,
+ enum kvm_arch_timers tmr,
+ enum kvm_arch_timer_regs treg,
+ u64 val)
+{
+ preempt_disable();
+ kvm_timer_vcpu_put(vcpu);
+
+ kvm_arm_timer_write(vcpu, vcpu_get_timer(vcpu, tmr), treg, val);
+
+ kvm_timer_vcpu_load(vcpu);
+ preempt_enable();
+}
+
static int kvm_timer_starting_cpu(unsigned int cpu)
{
kvm_timer_init_interrupt(NULL);
@@ -724,6 +913,8 @@ int kvm_timer_hyp_init(bool has_gic)
return -ENODEV;
}
+ /* First, do the virtual EL1 timer irq */
+
if (info->virtual_irq <= 0) {
kvm_err("kvm_arch_timer: invalid virtual timer IRQ: %d\n",
info->virtual_irq);
@@ -734,15 +925,15 @@ int kvm_timer_hyp_init(bool has_gic)
host_vtimer_irq_flags = irq_get_trigger_type(host_vtimer_irq);
if (host_vtimer_irq_flags != IRQF_TRIGGER_HIGH &&
host_vtimer_irq_flags != IRQF_TRIGGER_LOW) {
- kvm_err("Invalid trigger for IRQ%d, assuming level low\n",
+ kvm_err("Invalid trigger for vtimer IRQ%d, assuming level low\n",
host_vtimer_irq);
host_vtimer_irq_flags = IRQF_TRIGGER_LOW;
}
err = request_percpu_irq(host_vtimer_irq, kvm_arch_timer_handler,
- "kvm guest timer", kvm_get_running_vcpus());
+ "kvm guest vtimer", kvm_get_running_vcpus());
if (err) {
- kvm_err("kvm_arch_timer: can't request interrupt %d (%d)\n",
+ kvm_err("kvm_arch_timer: can't request vtimer interrupt %d (%d)\n",
host_vtimer_irq, err);
return err;
}
@@ -760,6 +951,43 @@ int kvm_timer_hyp_init(bool has_gic)
kvm_debug("virtual timer IRQ%d\n", host_vtimer_irq);
+ /* Now let's do the physical EL1 timer irq */
+
+ if (info->physical_irq > 0) {
+ host_ptimer_irq = info->physical_irq;
+ host_ptimer_irq_flags = irq_get_trigger_type(host_ptimer_irq);
+ if (host_ptimer_irq_flags != IRQF_TRIGGER_HIGH &&
+ host_ptimer_irq_flags != IRQF_TRIGGER_LOW) {
+ kvm_err("Invalid trigger for ptimer IRQ%d, assuming level low\n",
+ host_ptimer_irq);
+ host_ptimer_irq_flags = IRQF_TRIGGER_LOW;
+ }
+
+ err = request_percpu_irq(host_ptimer_irq, kvm_arch_timer_handler,
+ "kvm guest ptimer", kvm_get_running_vcpus());
+ if (err) {
+ kvm_err("kvm_arch_timer: can't request ptimer interrupt %d (%d)\n",
+ host_ptimer_irq, err);
+ return err;
+ }
+
+ if (has_gic) {
+ err = irq_set_vcpu_affinity(host_ptimer_irq,
+ kvm_get_running_vcpus());
+ if (err) {
+ kvm_err("kvm_arch_timer: error setting vcpu affinity\n");
+ goto out_free_irq;
+ }
+ }
+
+ kvm_debug("physical timer IRQ%d\n", host_ptimer_irq);
+ } else if (has_vhe()) {
+ kvm_err("kvm_arch_timer: invalid physical timer IRQ: %d\n",
+ info->physical_irq);
+ err = -ENODEV;
+ goto out_free_irq;
+ }
+
cpuhp_setup_state(CPUHP_AP_KVM_ARM_TIMER_STARTING,
"kvm/arm/timer:starting", kvm_timer_starting_cpu,
kvm_timer_dying_cpu);
@@ -771,7 +999,7 @@ out_free_irq:
void kvm_timer_vcpu_terminate(struct kvm_vcpu *vcpu)
{
- struct arch_timer_cpu *timer = &vcpu->arch.timer_cpu;
+ struct arch_timer_cpu *timer = vcpu_timer(vcpu);
soft_timer_cancel(&timer->bg_timer);
}
@@ -807,16 +1035,18 @@ bool kvm_arch_timer_get_input_level(int vintid)
if (vintid == vcpu_vtimer(vcpu)->irq.irq)
timer = vcpu_vtimer(vcpu);
+ else if (vintid == vcpu_ptimer(vcpu)->irq.irq)
+ timer = vcpu_ptimer(vcpu);
else
- BUG(); /* We only map the vtimer so far */
+ BUG();
return kvm_timer_should_fire(timer);
}
int kvm_timer_enable(struct kvm_vcpu *vcpu)
{
- struct arch_timer_cpu *timer = &vcpu->arch.timer_cpu;
- struct arch_timer_context *vtimer = vcpu_vtimer(vcpu);
+ struct arch_timer_cpu *timer = vcpu_timer(vcpu);
+ struct timer_map map;
int ret;
if (timer->enabled)
@@ -834,19 +1064,33 @@ int kvm_timer_enable(struct kvm_vcpu *vcpu)
return -EINVAL;
}
- ret = kvm_vgic_map_phys_irq(vcpu, host_vtimer_irq, vtimer->irq.irq,
+ get_timer_map(vcpu, &map);
+
+ ret = kvm_vgic_map_phys_irq(vcpu,
+ map.direct_vtimer->host_timer_irq,
+ map.direct_vtimer->irq.irq,
kvm_arch_timer_get_input_level);
if (ret)
return ret;
+ if (map.direct_ptimer) {
+ ret = kvm_vgic_map_phys_irq(vcpu,
+ map.direct_ptimer->host_timer_irq,
+ map.direct_ptimer->irq.irq,
+ kvm_arch_timer_get_input_level);
+ }
+
+ if (ret)
+ return ret;
+
no_vgic:
timer->enabled = 1;
return 0;
}
/*
- * On VHE system, we only need to configure trap on physical timer and counter
- * accesses in EL0 and EL1 once, not for every world switch.
+ * On VHE system, we only need to configure the EL2 timer trap register once,
+ * not for every world switch.
* The host kernel runs at EL2 with HCR_EL2.TGE == 1,
* and this makes those bits have no effect for the host kernel execution.
*/
@@ -857,11 +1101,11 @@ void kvm_timer_init_vhe(void)
u64 val;
/*
- * Disallow physical timer access for the guest.
- * Physical counter access is allowed.
+ * VHE systems allow the guest direct access to the EL1 physical
+ * timer/counter.
*/
val = read_sysreg(cnthctl_el2);
- val &= ~(CNTHCTL_EL1PCEN << cnthctl_shift);
+ val |= (CNTHCTL_EL1PCEN << cnthctl_shift);
val |= (CNTHCTL_EL1PCTEN << cnthctl_shift);
write_sysreg(val, cnthctl_el2);
}
diff --git a/virt/kvm/arm/arm.c b/virt/kvm/arm/arm.c
index 9c486fad3f9f..99c37384ba7b 100644
--- a/virt/kvm/arm/arm.c
+++ b/virt/kvm/arm/arm.c
@@ -65,7 +65,6 @@ static DEFINE_PER_CPU(struct kvm_vcpu *, kvm_arm_running_vcpu);
/* The VMID used in the VTTBR */
static atomic64_t kvm_vmid_gen = ATOMIC64_INIT(1);
static u32 kvm_next_vmid;
-static unsigned int kvm_vmid_bits __read_mostly;
static DEFINE_SPINLOCK(kvm_vmid_lock);
static bool vgic_present;
@@ -142,7 +141,7 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
kvm_vgic_early_init(kvm);
/* Mark the initial VMID generation invalid */
- kvm->arch.vmid_gen = 0;
+ kvm->arch.vmid.vmid_gen = 0;
/* The maximum number of VCPUs is limited by the host's GIC model */
kvm->arch.max_vcpus = vgic_present ?
@@ -336,13 +335,11 @@ int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu)
{
- kvm_timer_schedule(vcpu);
kvm_vgic_v4_enable_doorbell(vcpu);
}
void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu)
{
- kvm_timer_unschedule(vcpu);
kvm_vgic_v4_disable_doorbell(vcpu);
}
@@ -472,37 +469,31 @@ void force_vm_exit(const cpumask_t *mask)
/**
* need_new_vmid_gen - check that the VMID is still valid
- * @kvm: The VM's VMID to check
+ * @vmid: The VMID to check
*
* return true if there is a new generation of VMIDs being used
*
- * The hardware supports only 256 values with the value zero reserved for the
- * host, so we check if an assigned value belongs to a previous generation,
- * which which requires us to assign a new value. If we're the first to use a
- * VMID for the new generation, we must flush necessary caches and TLBs on all
- * CPUs.
+ * The hardware supports a limited set of values with the value zero reserved
+ * for the host, so we check if an assigned value belongs to a previous
+ * generation, which which requires us to assign a new value. If we're the
+ * first to use a VMID for the new generation, we must flush necessary caches
+ * and TLBs on all CPUs.
*/
-static bool need_new_vmid_gen(struct kvm *kvm)
+static bool need_new_vmid_gen(struct kvm_vmid *vmid)
{
u64 current_vmid_gen = atomic64_read(&kvm_vmid_gen);
smp_rmb(); /* Orders read of kvm_vmid_gen and kvm->arch.vmid */
- return unlikely(READ_ONCE(kvm->arch.vmid_gen) != current_vmid_gen);
+ return unlikely(READ_ONCE(vmid->vmid_gen) != current_vmid_gen);
}
/**
- * update_vttbr - Update the VTTBR with a valid VMID before the guest runs
- * @kvm The guest that we are about to run
- *
- * Called from kvm_arch_vcpu_ioctl_run before entering the guest to ensure the
- * VM has a valid VMID, otherwise assigns a new one and flushes corresponding
- * caches and TLBs.
+ * update_vmid - Update the vmid with a valid VMID for the current generation
+ * @kvm: The guest that struct vmid belongs to
+ * @vmid: The stage-2 VMID information struct
*/
-static void update_vttbr(struct kvm *kvm)
+static void update_vmid(struct kvm_vmid *vmid)
{
- phys_addr_t pgd_phys;
- u64 vmid, cnp = kvm_cpu_has_cnp() ? VTTBR_CNP_BIT : 0;
-
- if (!need_new_vmid_gen(kvm))
+ if (!need_new_vmid_gen(vmid))
return;
spin_lock(&kvm_vmid_lock);
@@ -512,7 +503,7 @@ static void update_vttbr(struct kvm *kvm)
* already allocated a valid vmid for this vm, then this vcpu should
* use the same vmid.
*/
- if (!need_new_vmid_gen(kvm)) {
+ if (!need_new_vmid_gen(vmid)) {
spin_unlock(&kvm_vmid_lock);
return;
}
@@ -536,18 +527,12 @@ static void update_vttbr(struct kvm *kvm)
kvm_call_hyp(__kvm_flush_vm_context);
}
- kvm->arch.vmid = kvm_next_vmid;
+ vmid->vmid = kvm_next_vmid;
kvm_next_vmid++;
- kvm_next_vmid &= (1 << kvm_vmid_bits) - 1;
-
- /* update vttbr to be used with the new vmid */
- pgd_phys = virt_to_phys(kvm->arch.pgd);
- BUG_ON(pgd_phys & ~kvm_vttbr_baddr_mask(kvm));
- vmid = ((u64)(kvm->arch.vmid) << VTTBR_VMID_SHIFT) & VTTBR_VMID_MASK(kvm_vmid_bits);
- kvm->arch.vttbr = kvm_phys_to_vttbr(pgd_phys) | vmid | cnp;
+ kvm_next_vmid &= (1 << kvm_get_vmid_bits()) - 1;
smp_wmb();
- WRITE_ONCE(kvm->arch.vmid_gen, atomic64_read(&kvm_vmid_gen));
+ WRITE_ONCE(vmid->vmid_gen, atomic64_read(&kvm_vmid_gen));
spin_unlock(&kvm_vmid_lock);
}
@@ -700,7 +685,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
*/
cond_resched();
- update_vttbr(vcpu->kvm);
+ update_vmid(&vcpu->kvm->arch.vmid);
check_vcpu_requests(vcpu);
@@ -749,7 +734,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
*/
smp_store_mb(vcpu->mode, IN_GUEST_MODE);
- if (ret <= 0 || need_new_vmid_gen(vcpu->kvm) ||
+ if (ret <= 0 || need_new_vmid_gen(&vcpu->kvm->arch.vmid) ||
kvm_request_pending(vcpu)) {
vcpu->mode = OUTSIDE_GUEST_MODE;
isb(); /* Ensure work in x_flush_hwstate is committed */
@@ -775,7 +760,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
ret = kvm_vcpu_run_vhe(vcpu);
kvm_arm_vhe_guest_exit();
} else {
- ret = kvm_call_hyp(__kvm_vcpu_run_nvhe, vcpu);
+ ret = kvm_call_hyp_ret(__kvm_vcpu_run_nvhe, vcpu);
}
vcpu->mode = OUTSIDE_GUEST_MODE;
@@ -1427,10 +1412,6 @@ static inline void hyp_cpu_pm_exit(void)
static int init_common_resources(void)
{
- /* set size of VMID supported by CPU */
- kvm_vmid_bits = kvm_get_vmid_bits();
- kvm_info("%d-bit VMID\n", kvm_vmid_bits);
-
kvm_set_ipa_limit();
return 0;
@@ -1571,6 +1552,7 @@ static int init_hyp_mode(void)
kvm_cpu_context_t *cpu_ctxt;
cpu_ctxt = per_cpu_ptr(&kvm_host_cpu_state, cpu);
+ kvm_init_host_cpu_context(cpu_ctxt, cpu);
err = create_hyp_mappings(cpu_ctxt, cpu_ctxt + 1, PAGE_HYP);
if (err) {
@@ -1581,7 +1563,7 @@ static int init_hyp_mode(void)
err = hyp_map_aux_data();
if (err)
- kvm_err("Cannot map host auxilary data: %d\n", err);
+ kvm_err("Cannot map host auxiliary data: %d\n", err);
return 0;
diff --git a/virt/kvm/arm/hyp/vgic-v3-sr.c b/virt/kvm/arm/hyp/vgic-v3-sr.c
index 9652c453480f..264d92da3240 100644
--- a/virt/kvm/arm/hyp/vgic-v3-sr.c
+++ b/virt/kvm/arm/hyp/vgic-v3-sr.c
@@ -226,7 +226,7 @@ void __hyp_text __vgic_v3_save_state(struct kvm_vcpu *vcpu)
int i;
u32 elrsr;
- elrsr = read_gicreg(ICH_ELSR_EL2);
+ elrsr = read_gicreg(ICH_ELRSR_EL2);
write_gicreg(cpu_if->vgic_hcr & ~ICH_HCR_EN, ICH_HCR_EL2);
diff --git a/virt/kvm/arm/mmu.c b/virt/kvm/arm/mmu.c
index e9d28a7ca673..ffd7acdceac7 100644
--- a/virt/kvm/arm/mmu.c
+++ b/virt/kvm/arm/mmu.c
@@ -908,6 +908,7 @@ int create_hyp_exec_mappings(phys_addr_t phys_addr, size_t size,
*/
int kvm_alloc_stage2_pgd(struct kvm *kvm)
{
+ phys_addr_t pgd_phys;
pgd_t *pgd;
if (kvm->arch.pgd != NULL) {
@@ -920,7 +921,12 @@ int kvm_alloc_stage2_pgd(struct kvm *kvm)
if (!pgd)
return -ENOMEM;
+ pgd_phys = virt_to_phys(pgd);
+ if (WARN_ON(pgd_phys & ~kvm_vttbr_baddr_mask(kvm)))
+ return -EINVAL;
+
kvm->arch.pgd = pgd;
+ kvm->arch.pgd_phys = pgd_phys;
return 0;
}
@@ -1008,6 +1014,7 @@ void kvm_free_stage2_pgd(struct kvm *kvm)
unmap_stage2_range(kvm, 0, kvm_phys_size(kvm));
pgd = READ_ONCE(kvm->arch.pgd);
kvm->arch.pgd = NULL;
+ kvm->arch.pgd_phys = 0;
}
spin_unlock(&kvm->mmu_lock);
@@ -1396,14 +1403,6 @@ static bool transparent_hugepage_adjust(kvm_pfn_t *pfnp, phys_addr_t *ipap)
return false;
}
-static bool kvm_is_write_fault(struct kvm_vcpu *vcpu)
-{
- if (kvm_vcpu_trap_is_iabt(vcpu))
- return false;
-
- return kvm_vcpu_dabt_iswrite(vcpu);
-}
-
/**
* stage2_wp_ptes - write protect PMD range
* @pmd: pointer to pmd entry
@@ -1598,14 +1597,13 @@ static void kvm_send_hwpoison_signal(unsigned long address,
static bool fault_supports_stage2_pmd_mappings(struct kvm_memory_slot *memslot,
unsigned long hva)
{
- gpa_t gpa_start, gpa_end;
+ gpa_t gpa_start;
hva_t uaddr_start, uaddr_end;
size_t size;
size = memslot->npages * PAGE_SIZE;
gpa_start = memslot->base_gfn << PAGE_SHIFT;
- gpa_end = gpa_start + size;
uaddr_start = memslot->userspace_addr;
uaddr_end = uaddr_start + size;
@@ -2353,7 +2351,7 @@ int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
return 0;
}
-void kvm_arch_memslots_updated(struct kvm *kvm, struct kvm_memslots *slots)
+void kvm_arch_memslots_updated(struct kvm *kvm, u64 gen)
{
}
diff --git a/virt/kvm/arm/trace.h b/virt/kvm/arm/trace.h
index 3828beab93f2..204d210d01c2 100644
--- a/virt/kvm/arm/trace.h
+++ b/virt/kvm/arm/trace.h
@@ -2,6 +2,7 @@
#if !defined(_TRACE_KVM_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_KVM_H
+#include <kvm/arm_arch_timer.h>
#include <linux/tracepoint.h>
#undef TRACE_SYSTEM
@@ -262,10 +263,114 @@ TRACE_EVENT(kvm_timer_update_irq,
__entry->vcpu_id, __entry->irq, __entry->level)
);
+TRACE_EVENT(kvm_get_timer_map,
+ TP_PROTO(unsigned long vcpu_id, struct timer_map *map),
+ TP_ARGS(vcpu_id, map),
+
+ TP_STRUCT__entry(
+ __field( unsigned long, vcpu_id )
+ __field( int, direct_vtimer )
+ __field( int, direct_ptimer )
+ __field( int, emul_ptimer )
+ ),
+
+ TP_fast_assign(
+ __entry->vcpu_id = vcpu_id;
+ __entry->direct_vtimer = arch_timer_ctx_index(map->direct_vtimer);
+ __entry->direct_ptimer =
+ (map->direct_ptimer) ? arch_timer_ctx_index(map->direct_ptimer) : -1;
+ __entry->emul_ptimer =
+ (map->emul_ptimer) ? arch_timer_ctx_index(map->emul_ptimer) : -1;
+ ),
+
+ TP_printk("VCPU: %ld, dv: %d, dp: %d, ep: %d",
+ __entry->vcpu_id,
+ __entry->direct_vtimer,
+ __entry->direct_ptimer,
+ __entry->emul_ptimer)
+);
+
+TRACE_EVENT(kvm_timer_save_state,
+ TP_PROTO(struct arch_timer_context *ctx),
+ TP_ARGS(ctx),
+
+ TP_STRUCT__entry(
+ __field( unsigned long, ctl )
+ __field( unsigned long long, cval )
+ __field( int, timer_idx )
+ ),
+
+ TP_fast_assign(
+ __entry->ctl = ctx->cnt_ctl;
+ __entry->cval = ctx->cnt_cval;
+ __entry->timer_idx = arch_timer_ctx_index(ctx);
+ ),
+
+ TP_printk(" CTL: %#08lx CVAL: %#16llx arch_timer_ctx_index: %d",
+ __entry->ctl,
+ __entry->cval,
+ __entry->timer_idx)
+);
+
+TRACE_EVENT(kvm_timer_restore_state,
+ TP_PROTO(struct arch_timer_context *ctx),
+ TP_ARGS(ctx),
+
+ TP_STRUCT__entry(
+ __field( unsigned long, ctl )
+ __field( unsigned long long, cval )
+ __field( int, timer_idx )
+ ),
+
+ TP_fast_assign(
+ __entry->ctl = ctx->cnt_ctl;
+ __entry->cval = ctx->cnt_cval;
+ __entry->timer_idx = arch_timer_ctx_index(ctx);
+ ),
+
+ TP_printk("CTL: %#08lx CVAL: %#16llx arch_timer_ctx_index: %d",
+ __entry->ctl,
+ __entry->cval,
+ __entry->timer_idx)
+);
+
+TRACE_EVENT(kvm_timer_hrtimer_expire,
+ TP_PROTO(struct arch_timer_context *ctx),
+ TP_ARGS(ctx),
+
+ TP_STRUCT__entry(
+ __field( int, timer_idx )
+ ),
+
+ TP_fast_assign(
+ __entry->timer_idx = arch_timer_ctx_index(ctx);
+ ),
+
+ TP_printk("arch_timer_ctx_index: %d", __entry->timer_idx)
+);
+
+TRACE_EVENT(kvm_timer_emulate,
+ TP_PROTO(struct arch_timer_context *ctx, bool should_fire),
+ TP_ARGS(ctx, should_fire),
+
+ TP_STRUCT__entry(
+ __field( int, timer_idx )
+ __field( bool, should_fire )
+ ),
+
+ TP_fast_assign(
+ __entry->timer_idx = arch_timer_ctx_index(ctx);
+ __entry->should_fire = should_fire;
+ ),
+
+ TP_printk("arch_timer_ctx_index: %d (should_fire: %d)",
+ __entry->timer_idx, __entry->should_fire)
+);
+
#endif /* _TRACE_KVM_H */
#undef TRACE_INCLUDE_PATH
-#define TRACE_INCLUDE_PATH ../../../virt/kvm/arm
+#define TRACE_INCLUDE_PATH ../../virt/kvm/arm
#undef TRACE_INCLUDE_FILE
#define TRACE_INCLUDE_FILE trace
diff --git a/virt/kvm/arm/vgic/vgic-v3.c b/virt/kvm/arm/vgic/vgic-v3.c
index 4ee0aeb9a905..408a78eb6a97 100644
--- a/virt/kvm/arm/vgic/vgic-v3.c
+++ b/virt/kvm/arm/vgic/vgic-v3.c
@@ -589,7 +589,7 @@ early_param("kvm-arm.vgic_v4_enable", early_gicv4_enable);
*/
int vgic_v3_probe(const struct gic_kvm_info *info)
{
- u32 ich_vtr_el2 = kvm_call_hyp(__vgic_v3_get_ich_vtr_el2);
+ u32 ich_vtr_el2 = kvm_call_hyp_ret(__vgic_v3_get_ich_vtr_el2);
int ret;
/*
@@ -679,7 +679,7 @@ void vgic_v3_put(struct kvm_vcpu *vcpu)
struct vgic_v3_cpu_if *cpu_if = &vcpu->arch.vgic_cpu.vgic_v3;
if (likely(cpu_if->vgic_sre))
- cpu_if->vgic_vmcr = kvm_call_hyp(__vgic_v3_read_vmcr);
+ cpu_if->vgic_vmcr = kvm_call_hyp_ret(__vgic_v3_read_vmcr);
kvm_call_hyp(__vgic_v3_save_aprs, vcpu);
diff --git a/virt/kvm/coalesced_mmio.c b/virt/kvm/coalesced_mmio.c
index 6855cce3e528..5294abb3f178 100644
--- a/virt/kvm/coalesced_mmio.c
+++ b/virt/kvm/coalesced_mmio.c
@@ -144,7 +144,8 @@ int kvm_vm_ioctl_register_coalesced_mmio(struct kvm *kvm,
if (zone->pio != 1 && zone->pio != 0)
return -EINVAL;
- dev = kzalloc(sizeof(struct kvm_coalesced_mmio_dev), GFP_KERNEL);
+ dev = kzalloc(sizeof(struct kvm_coalesced_mmio_dev),
+ GFP_KERNEL_ACCOUNT);
if (!dev)
return -ENOMEM;
diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c
index b20b751286fc..4325250afd72 100644
--- a/virt/kvm/eventfd.c
+++ b/virt/kvm/eventfd.c
@@ -297,7 +297,7 @@ kvm_irqfd_assign(struct kvm *kvm, struct kvm_irqfd *args)
if (!kvm_arch_intc_initialized(kvm))
return -EAGAIN;
- irqfd = kzalloc(sizeof(*irqfd), GFP_KERNEL);
+ irqfd = kzalloc(sizeof(*irqfd), GFP_KERNEL_ACCOUNT);
if (!irqfd)
return -ENOMEM;
@@ -345,7 +345,8 @@ kvm_irqfd_assign(struct kvm *kvm, struct kvm_irqfd *args)
}
if (!irqfd->resampler) {
- resampler = kzalloc(sizeof(*resampler), GFP_KERNEL);
+ resampler = kzalloc(sizeof(*resampler),
+ GFP_KERNEL_ACCOUNT);
if (!resampler) {
ret = -ENOMEM;
mutex_unlock(&kvm->irqfds.resampler_lock);
@@ -797,7 +798,7 @@ static int kvm_assign_ioeventfd_idx(struct kvm *kvm,
if (IS_ERR(eventfd))
return PTR_ERR(eventfd);
- p = kzalloc(sizeof(*p), GFP_KERNEL);
+ p = kzalloc(sizeof(*p), GFP_KERNEL_ACCOUNT);
if (!p) {
ret = -ENOMEM;
goto fail;
diff --git a/virt/kvm/irqchip.c b/virt/kvm/irqchip.c
index b1286c4e0712..3547b0d8c91e 100644
--- a/virt/kvm/irqchip.c
+++ b/virt/kvm/irqchip.c
@@ -196,7 +196,7 @@ int kvm_set_irq_routing(struct kvm *kvm,
nr_rt_entries += 1;
new = kzalloc(sizeof(*new) + (nr_rt_entries * sizeof(struct hlist_head)),
- GFP_KERNEL);
+ GFP_KERNEL_ACCOUNT);
if (!new)
return -ENOMEM;
@@ -208,7 +208,7 @@ int kvm_set_irq_routing(struct kvm *kvm,
for (i = 0; i < nr; ++i) {
r = -ENOMEM;
- e = kzalloc(sizeof(*e), GFP_KERNEL);
+ e = kzalloc(sizeof(*e), GFP_KERNEL_ACCOUNT);
if (!e)
goto out;
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index d237d3350a99..f25aa98a94df 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -81,6 +81,11 @@ unsigned int halt_poll_ns_grow = 2;
module_param(halt_poll_ns_grow, uint, 0644);
EXPORT_SYMBOL_GPL(halt_poll_ns_grow);
+/* The start value to grow halt_poll_ns from */
+unsigned int halt_poll_ns_grow_start = 10000; /* 10us */
+module_param(halt_poll_ns_grow_start, uint, 0644);
+EXPORT_SYMBOL_GPL(halt_poll_ns_grow_start);
+
/* Default resets per-vcpu halt_poll_ns . */
unsigned int halt_poll_ns_shrink;
module_param(halt_poll_ns_shrink, uint, 0644);
@@ -525,7 +530,7 @@ static struct kvm_memslots *kvm_alloc_memslots(void)
int i;
struct kvm_memslots *slots;
- slots = kvzalloc(sizeof(struct kvm_memslots), GFP_KERNEL);
+ slots = kvzalloc(sizeof(struct kvm_memslots), GFP_KERNEL_ACCOUNT);
if (!slots)
return NULL;
@@ -601,12 +606,12 @@ static int kvm_create_vm_debugfs(struct kvm *kvm, int fd)
kvm->debugfs_stat_data = kcalloc(kvm_debugfs_num_entries,
sizeof(*kvm->debugfs_stat_data),
- GFP_KERNEL);
+ GFP_KERNEL_ACCOUNT);
if (!kvm->debugfs_stat_data)
return -ENOMEM;
for (p = debugfs_entries; p->name; p++) {
- stat_data = kzalloc(sizeof(*stat_data), GFP_KERNEL);
+ stat_data = kzalloc(sizeof(*stat_data), GFP_KERNEL_ACCOUNT);
if (!stat_data)
return -ENOMEM;
@@ -656,12 +661,8 @@ static struct kvm *kvm_create_vm(unsigned long type)
struct kvm_memslots *slots = kvm_alloc_memslots();
if (!slots)
goto out_err_no_srcu;
- /*
- * Generations must be different for each address space.
- * Init kvm generation close to the maximum to easily test the
- * code of handling generation number wrap-around.
- */
- slots->generation = i * 2 - 150;
+ /* Generations must be different for each address space. */
+ slots->generation = i;
rcu_assign_pointer(kvm->memslots[i], slots);
}
@@ -671,7 +672,7 @@ static struct kvm *kvm_create_vm(unsigned long type)
goto out_err_no_irq_srcu;
for (i = 0; i < KVM_NR_BUSES; i++) {
rcu_assign_pointer(kvm->buses[i],
- kzalloc(sizeof(struct kvm_io_bus), GFP_KERNEL));
+ kzalloc(sizeof(struct kvm_io_bus), GFP_KERNEL_ACCOUNT));
if (!kvm->buses[i])
goto out_err;
}
@@ -789,7 +790,7 @@ static int kvm_create_dirty_bitmap(struct kvm_memory_slot *memslot)
{
unsigned long dirty_bytes = 2 * kvm_dirty_bitmap_bytes(memslot);
- memslot->dirty_bitmap = kvzalloc(dirty_bytes, GFP_KERNEL);
+ memslot->dirty_bitmap = kvzalloc(dirty_bytes, GFP_KERNEL_ACCOUNT);
if (!memslot->dirty_bitmap)
return -ENOMEM;
@@ -874,31 +875,34 @@ static struct kvm_memslots *install_new_memslots(struct kvm *kvm,
int as_id, struct kvm_memslots *slots)
{
struct kvm_memslots *old_memslots = __kvm_memslots(kvm, as_id);
+ u64 gen = old_memslots->generation;
- /*
- * Set the low bit in the generation, which disables SPTE caching
- * until the end of synchronize_srcu_expedited.
- */
- WARN_ON(old_memslots->generation & 1);
- slots->generation = old_memslots->generation + 1;
+ WARN_ON(gen & KVM_MEMSLOT_GEN_UPDATE_IN_PROGRESS);
+ slots->generation = gen | KVM_MEMSLOT_GEN_UPDATE_IN_PROGRESS;
rcu_assign_pointer(kvm->memslots[as_id], slots);
synchronize_srcu_expedited(&kvm->srcu);
/*
- * Increment the new memslot generation a second time. This prevents
- * vm exits that race with memslot updates from caching a memslot
- * generation that will (potentially) be valid forever.
- *
+ * Increment the new memslot generation a second time, dropping the
+ * update in-progress flag and incrementing then generation based on
+ * the number of address spaces. This provides a unique and easily
+ * identifiable generation number while the memslots are in flux.
+ */
+ gen = slots->generation & ~KVM_MEMSLOT_GEN_UPDATE_IN_PROGRESS;
+
+ /*
* Generations must be unique even across address spaces. We do not need
* a global counter for that, instead the generation space is evenly split
* across address spaces. For example, with two address spaces, address
- * space 0 will use generations 0, 4, 8, ... while * address space 1 will
- * use generations 2, 6, 10, 14, ...
+ * space 0 will use generations 0, 2, 4, ... while address space 1 will
+ * use generations 1, 3, 5, ...
*/
- slots->generation += KVM_ADDRESS_SPACE_NUM * 2 - 1;
+ gen += KVM_ADDRESS_SPACE_NUM;
+
+ kvm_arch_memslots_updated(kvm, gen);
- kvm_arch_memslots_updated(kvm, slots);
+ slots->generation = gen;
return old_memslots;
}
@@ -1018,7 +1022,7 @@ int __kvm_set_memory_region(struct kvm *kvm,
goto out_free;
}
- slots = kvzalloc(sizeof(struct kvm_memslots), GFP_KERNEL);
+ slots = kvzalloc(sizeof(struct kvm_memslots), GFP_KERNEL_ACCOUNT);
if (!slots)
goto out_free;
memcpy(slots, __kvm_memslots(kvm, as_id), sizeof(struct kvm_memslots));
@@ -1201,11 +1205,9 @@ int kvm_get_dirty_log_protect(struct kvm *kvm,
mask = xchg(&dirty_bitmap[i], 0);
dirty_bitmap_buffer[i] = mask;
- if (mask) {
- offset = i * BITS_PER_LONG;
- kvm_arch_mmu_enable_log_dirty_pt_masked(kvm, memslot,
- offset, mask);
- }
+ offset = i * BITS_PER_LONG;
+ kvm_arch_mmu_enable_log_dirty_pt_masked(kvm, memslot,
+ offset, mask);
}
spin_unlock(&kvm->mmu_lock);
}
@@ -2185,20 +2187,23 @@ void kvm_sigset_deactivate(struct kvm_vcpu *vcpu)
static void grow_halt_poll_ns(struct kvm_vcpu *vcpu)
{
- unsigned int old, val, grow;
+ unsigned int old, val, grow, grow_start;
old = val = vcpu->halt_poll_ns;
+ grow_start = READ_ONCE(halt_poll_ns_grow_start);
grow = READ_ONCE(halt_poll_ns_grow);
- /* 10us base */
- if (val == 0 && grow)
- val = 10000;
- else
- val *= grow;
+ if (!grow)
+ goto out;
+
+ val *= grow;
+ if (val < grow_start)
+ val = grow_start;
if (val > halt_poll_ns)
val = halt_poll_ns;
vcpu->halt_poll_ns = val;
+out:
trace_kvm_halt_poll_ns_grow(vcpu->vcpu_id, val, old);
}
@@ -2683,7 +2688,7 @@ static long kvm_vcpu_ioctl(struct file *filp,
struct kvm_regs *kvm_regs;
r = -ENOMEM;
- kvm_regs = kzalloc(sizeof(struct kvm_regs), GFP_KERNEL);
+ kvm_regs = kzalloc(sizeof(struct kvm_regs), GFP_KERNEL_ACCOUNT);
if (!kvm_regs)
goto out;
r = kvm_arch_vcpu_ioctl_get_regs(vcpu, kvm_regs);
@@ -2711,7 +2716,8 @@ out_free1:
break;
}
case KVM_GET_SREGS: {
- kvm_sregs = kzalloc(sizeof(struct kvm_sregs), GFP_KERNEL);
+ kvm_sregs = kzalloc(sizeof(struct kvm_sregs),
+ GFP_KERNEL_ACCOUNT);
r = -ENOMEM;
if (!kvm_sregs)
goto out;
@@ -2803,7 +2809,7 @@ out_free1:
break;
}
case KVM_GET_FPU: {
- fpu = kzalloc(sizeof(struct kvm_fpu), GFP_KERNEL);
+ fpu = kzalloc(sizeof(struct kvm_fpu), GFP_KERNEL_ACCOUNT);
r = -ENOMEM;
if (!fpu)
goto out;
@@ -2980,7 +2986,7 @@ static int kvm_ioctl_create_device(struct kvm *kvm,
if (test)
return 0;
- dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+ dev = kzalloc(sizeof(*dev), GFP_KERNEL_ACCOUNT);
if (!dev)
return -ENOMEM;
@@ -3625,6 +3631,7 @@ int kvm_io_bus_write(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx, gpa_t addr,
r = __kvm_io_bus_write(vcpu, bus, &range, val);
return r < 0 ? r : 0;
}
+EXPORT_SYMBOL_GPL(kvm_io_bus_write);
/* kvm_io_bus_write_cookie - called under kvm->slots_lock */
int kvm_io_bus_write_cookie(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx,
@@ -3675,7 +3682,6 @@ static int __kvm_io_bus_read(struct kvm_vcpu *vcpu, struct kvm_io_bus *bus,
return -EOPNOTSUPP;
}
-EXPORT_SYMBOL_GPL(kvm_io_bus_write);
/* kvm_io_bus_read - called under kvm->slots_lock */
int kvm_io_bus_read(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx, gpa_t addr,
@@ -3697,7 +3703,6 @@ int kvm_io_bus_read(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx, gpa_t addr,
return r < 0 ? r : 0;
}
-
/* Caller must hold slots_lock. */
int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
int len, struct kvm_io_device *dev)
@@ -3714,8 +3719,8 @@ int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
if (bus->dev_count - bus->ioeventfd_count > NR_IOBUS_DEVS - 1)
return -ENOSPC;
- new_bus = kmalloc(sizeof(*bus) + ((bus->dev_count + 1) *
- sizeof(struct kvm_io_range)), GFP_KERNEL);
+ new_bus = kmalloc(struct_size(bus, range, bus->dev_count + 1),
+ GFP_KERNEL_ACCOUNT);
if (!new_bus)
return -ENOMEM;
@@ -3760,8 +3765,8 @@ void kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
if (i == bus->dev_count)
return;
- new_bus = kmalloc(sizeof(*bus) + ((bus->dev_count - 1) *
- sizeof(struct kvm_io_range)), GFP_KERNEL);
+ new_bus = kmalloc(struct_size(bus, range, bus->dev_count - 1),
+ GFP_KERNEL_ACCOUNT);
if (!new_bus) {
pr_err("kvm: failed to shrink bus, removing it completely\n");
goto broken;
@@ -4029,7 +4034,7 @@ static void kvm_uevent_notify_change(unsigned int type, struct kvm *kvm)
active = kvm_active_vms;
spin_unlock(&kvm_lock);
- env = kzalloc(sizeof(*env), GFP_KERNEL);
+ env = kzalloc(sizeof(*env), GFP_KERNEL_ACCOUNT);
if (!env)
return;
@@ -4045,7 +4050,7 @@ static void kvm_uevent_notify_change(unsigned int type, struct kvm *kvm)
add_uevent_var(env, "PID=%d", kvm->userspace_pid);
if (!IS_ERR_OR_NULL(kvm->debugfs_dentry)) {
- char *tmp, *p = kmalloc(PATH_MAX, GFP_KERNEL);
+ char *tmp, *p = kmalloc(PATH_MAX, GFP_KERNEL_ACCOUNT);
if (p) {
tmp = dentry_path_raw(kvm->debugfs_dentry, p, PATH_MAX);
diff --git a/virt/kvm/vfio.c b/virt/kvm/vfio.c
index d99850c462a1..524cbd20379f 100644
--- a/virt/kvm/vfio.c
+++ b/virt/kvm/vfio.c
@@ -219,7 +219,7 @@ static int kvm_vfio_set_group(struct kvm_device *dev, long attr, u64 arg)
}
}
- kvg = kzalloc(sizeof(*kvg), GFP_KERNEL);
+ kvg = kzalloc(sizeof(*kvg), GFP_KERNEL_ACCOUNT);
if (!kvg) {
mutex_unlock(&kv->lock);
kvm_vfio_group_put_external_user(vfio_group);
@@ -405,7 +405,7 @@ static int kvm_vfio_create(struct kvm_device *dev, u32 type)
if (tmp->ops == &kvm_vfio_ops)
return -EBUSY;
- kv = kzalloc(sizeof(*kv), GFP_KERNEL);
+ kv = kzalloc(sizeof(*kv), GFP_KERNEL_ACCOUNT);
if (!kv)
return -ENOMEM;