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Diffstat (limited to 'virt/kvm/kvm_main.c')
-rw-r--r--virt/kvm/kvm_main.c33
1 files changed, 19 insertions, 14 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 3d233ebfbee9..9263ead9fd32 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -273,7 +273,8 @@ void kvm_flush_remote_tlbs(struct kvm *kvm)
* kvm_make_all_cpus_request() reads vcpu->mode. We reuse that
* barrier here.
*/
- if (kvm_make_all_cpus_request(kvm, KVM_REQ_TLB_FLUSH))
+ if (!kvm_arch_flush_remote_tlb(kvm)
+ || kvm_make_all_cpus_request(kvm, KVM_REQ_TLB_FLUSH))
++kvm->stat.remote_tlb_flush;
cmpxchg(&kvm->tlbs_dirty, dirty_count, 0);
}
@@ -1169,7 +1170,7 @@ int kvm_get_dirty_log_protect(struct kvm *kvm,
n = kvm_dirty_bitmap_bytes(memslot);
- dirty_bitmap_buffer = dirty_bitmap + n / sizeof(long);
+ dirty_bitmap_buffer = kvm_second_dirty_bitmap(memslot);
memset(dirty_bitmap_buffer, 0, n);
spin_lock(&kvm->mmu_lock);
@@ -1342,18 +1343,16 @@ static inline int check_user_page_hwpoison(unsigned long addr)
}
/*
- * The atomic path to get the writable pfn which will be stored in @pfn,
- * true indicates success, otherwise false is returned.
+ * The fast path to get the writable pfn which will be stored in @pfn,
+ * true indicates success, otherwise false is returned. It's also the
+ * only part that runs if we can are in atomic context.
*/
-static bool hva_to_pfn_fast(unsigned long addr, bool atomic, bool *async,
- bool write_fault, bool *writable, kvm_pfn_t *pfn)
+static bool hva_to_pfn_fast(unsigned long addr, bool write_fault,
+ bool *writable, kvm_pfn_t *pfn)
{
struct page *page[1];
int npages;
- if (!(async || atomic))
- return false;
-
/*
* Fast pin a writable pfn only if it is a write fault request
* or the caller allows to map a writable pfn for a read fault
@@ -1497,7 +1496,7 @@ static kvm_pfn_t hva_to_pfn(unsigned long addr, bool atomic, bool *async,
/* we can do it either atomically or asynchronously, not both */
BUG_ON(atomic && async);
- if (hva_to_pfn_fast(addr, atomic, async, write_fault, writable, &pfn))
+ if (hva_to_pfn_fast(addr, write_fault, writable, &pfn))
return pfn;
if (atomic)
@@ -2127,16 +2126,22 @@ static void shrink_halt_poll_ns(struct kvm_vcpu *vcpu)
static int kvm_vcpu_check_block(struct kvm_vcpu *vcpu)
{
+ int ret = -EINTR;
+ int idx = srcu_read_lock(&vcpu->kvm->srcu);
+
if (kvm_arch_vcpu_runnable(vcpu)) {
kvm_make_request(KVM_REQ_UNHALT, vcpu);
- return -EINTR;
+ goto out;
}
if (kvm_cpu_has_pending_timer(vcpu))
- return -EINTR;
+ goto out;
if (signal_pending(current))
- return -EINTR;
+ goto out;
- return 0;
+ ret = 0;
+out:
+ srcu_read_unlock(&vcpu->kvm->srcu, idx);
+ return ret;
}
/*