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authorLinus Torvalds <torvalds@linux-foundation.org>2012-07-24 12:01:20 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-07-24 12:01:20 -0700
commit5fecc9d8f59e765c2a48379dd7c6f5cf88c7d75a (patch)
treed1fc25d9650d3ac24591bba6f5e2e7a1afc54796 /virt
parent3c4cfadef6a1665d9cd02a543782d03d3e6740c6 (diff)
parent1a577b72475d161b6677c05abe57301362023bb2 (diff)
downloadlinux-5fecc9d8f59e765c2a48379dd7c6f5cf88c7d75a.tar.gz
Merge tag 'kvm-3.6-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull KVM updates from Avi Kivity: "Highlights include - full big real mode emulation on pre-Westmere Intel hosts (can be disabled with emulate_invalid_guest_state=0) - relatively small ppc and s390 updates - PCID/INVPCID support in guests - EOI avoidance; 3.6 guests should perform better on 3.6 hosts on interrupt intensive workloads) - Lockless write faults during live migration - EPT accessed/dirty bits support for new Intel processors" Fix up conflicts in: - Documentation/virtual/kvm/api.txt: Stupid subchapter numbering, added next to each other. - arch/powerpc/kvm/booke_interrupts.S: PPC asm changes clashing with the KVM fixes - arch/s390/include/asm/sigp.h, arch/s390/kvm/sigp.c: Duplicated commits through the kvm tree and the s390 tree, with subsequent edits in the KVM tree. * tag 'kvm-3.6-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (93 commits) KVM: fix race with level interrupts x86, hyper: fix build with !CONFIG_KVM_GUEST Revert "apic: fix kvm build on UP without IOAPIC" KVM guest: switch to apic_set_eoi_write, apic_write apic: add apic_set_eoi_write for PV use KVM: VMX: Implement PCID/INVPCID for guests with EPT KVM: Add x86_hyper_kvm to complete detect_hypervisor_platform check KVM: PPC: Critical interrupt emulation support KVM: PPC: e500mc: Fix tlbilx emulation for 64-bit guests KVM: PPC64: booke: Set interrupt computation mode for 64-bit host KVM: PPC: bookehv: Add ESR flag to Data Storage Interrupt KVM: PPC: bookehv64: Add support for std/ld emulation. booke: Added crit/mc exception handler for e500v2 booke/bookehv: Add host crit-watchdog exception support KVM: MMU: document mmu-lock and fast page fault KVM: MMU: fix kvm_mmu_pagetable_walk tracepoint KVM: MMU: trace fast page fault KVM: MMU: fast path of handling guest page fault KVM: MMU: introduce SPTE_MMU_WRITEABLE bit KVM: MMU: fold tlb flush judgement into mmu_spte_update ...
Diffstat (limited to 'virt')
-rw-r--r--virt/kvm/ioapic.c19
-rw-r--r--virt/kvm/ioapic.h4
-rw-r--r--virt/kvm/irq_comm.c31
-rw-r--r--virt/kvm/kvm_main.c36
4 files changed, 47 insertions, 43 deletions
diff --git a/virt/kvm/ioapic.c b/virt/kvm/ioapic.c
index 26fd54dc459..ef61d529a6c 100644
--- a/virt/kvm/ioapic.c
+++ b/virt/kvm/ioapic.c
@@ -191,7 +191,8 @@ static int ioapic_deliver(struct kvm_ioapic *ioapic, int irq)
return kvm_irq_delivery_to_apic(ioapic->kvm, NULL, &irqe);
}
-int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int level)
+int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int irq_source_id,
+ int level)
{
u32 old_irr;
u32 mask = 1 << irq;
@@ -201,9 +202,11 @@ int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int level)
spin_lock(&ioapic->lock);
old_irr = ioapic->irr;
if (irq >= 0 && irq < IOAPIC_NUM_PINS) {
+ int irq_level = __kvm_irq_line_state(&ioapic->irq_states[irq],
+ irq_source_id, level);
entry = ioapic->redirtbl[irq];
- level ^= entry.fields.polarity;
- if (!level)
+ irq_level ^= entry.fields.polarity;
+ if (!irq_level)
ioapic->irr &= ~mask;
else {
int edge = (entry.fields.trig_mode == IOAPIC_EDGE_TRIG);
@@ -221,6 +224,16 @@ int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int level)
return ret;
}
+void kvm_ioapic_clear_all(struct kvm_ioapic *ioapic, int irq_source_id)
+{
+ int i;
+
+ spin_lock(&ioapic->lock);
+ for (i = 0; i < KVM_IOAPIC_NUM_PINS; i++)
+ __clear_bit(irq_source_id, &ioapic->irq_states[i]);
+ spin_unlock(&ioapic->lock);
+}
+
static void __kvm_ioapic_update_eoi(struct kvm_ioapic *ioapic, int vector,
int trigger_mode)
{
diff --git a/virt/kvm/ioapic.h b/virt/kvm/ioapic.h
index 32872a09b63..a30abfe6ed1 100644
--- a/virt/kvm/ioapic.h
+++ b/virt/kvm/ioapic.h
@@ -74,7 +74,9 @@ void kvm_ioapic_update_eoi(struct kvm *kvm, int vector, int trigger_mode);
bool kvm_ioapic_handles_vector(struct kvm *kvm, int vector);
int kvm_ioapic_init(struct kvm *kvm);
void kvm_ioapic_destroy(struct kvm *kvm);
-int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int level);
+int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int irq_source_id,
+ int level);
+void kvm_ioapic_clear_all(struct kvm_ioapic *ioapic, int irq_source_id);
void kvm_ioapic_reset(struct kvm_ioapic *ioapic);
int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src,
struct kvm_lapic_irq *irq);
diff --git a/virt/kvm/irq_comm.c b/virt/kvm/irq_comm.c
index 5afb4311402..83402d74a76 100644
--- a/virt/kvm/irq_comm.c
+++ b/virt/kvm/irq_comm.c
@@ -33,26 +33,12 @@
#include "ioapic.h"
-static inline int kvm_irq_line_state(unsigned long *irq_state,
- int irq_source_id, int level)
-{
- /* Logical OR for level trig interrupt */
- if (level)
- set_bit(irq_source_id, irq_state);
- else
- clear_bit(irq_source_id, irq_state);
-
- return !!(*irq_state);
-}
-
static int kvm_set_pic_irq(struct kvm_kernel_irq_routing_entry *e,
struct kvm *kvm, int irq_source_id, int level)
{
#ifdef CONFIG_X86
struct kvm_pic *pic = pic_irqchip(kvm);
- level = kvm_irq_line_state(&pic->irq_states[e->irqchip.pin],
- irq_source_id, level);
- return kvm_pic_set_irq(pic, e->irqchip.pin, level);
+ return kvm_pic_set_irq(pic, e->irqchip.pin, irq_source_id, level);
#else
return -1;
#endif
@@ -62,10 +48,7 @@ static int kvm_set_ioapic_irq(struct kvm_kernel_irq_routing_entry *e,
struct kvm *kvm, int irq_source_id, int level)
{
struct kvm_ioapic *ioapic = kvm->arch.vioapic;
- level = kvm_irq_line_state(&ioapic->irq_states[e->irqchip.pin],
- irq_source_id, level);
-
- return kvm_ioapic_set_irq(ioapic, e->irqchip.pin, level);
+ return kvm_ioapic_set_irq(ioapic, e->irqchip.pin, irq_source_id, level);
}
inline static bool kvm_is_dm_lowest_prio(struct kvm_lapic_irq *irq)
@@ -249,8 +232,6 @@ unlock:
void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id)
{
- int i;
-
ASSERT(irq_source_id != KVM_USERSPACE_IRQ_SOURCE_ID);
mutex_lock(&kvm->irq_lock);
@@ -263,14 +244,10 @@ void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id)
if (!irqchip_in_kernel(kvm))
goto unlock;
- for (i = 0; i < KVM_IOAPIC_NUM_PINS; i++) {
- clear_bit(irq_source_id, &kvm->arch.vioapic->irq_states[i]);
- if (i >= 16)
- continue;
+ kvm_ioapic_clear_all(kvm->arch.vioapic, irq_source_id);
#ifdef CONFIG_X86
- clear_bit(irq_source_id, &pic_irqchip(kvm)->irq_states[i]);
+ kvm_pic_clear_all(pic_irqchip(kvm), irq_source_id);
#endif
- }
unlock:
mutex_unlock(&kvm->irq_lock);
}
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 44ee7124b16..246852397e3 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -516,16 +516,32 @@ out_err_nodisable:
return ERR_PTR(r);
}
+/*
+ * Avoid using vmalloc for a small buffer.
+ * Should not be used when the size is statically known.
+ */
+void *kvm_kvzalloc(unsigned long size)
+{
+ if (size > PAGE_SIZE)
+ return vzalloc(size);
+ else
+ return kzalloc(size, GFP_KERNEL);
+}
+
+void kvm_kvfree(const void *addr)
+{
+ if (is_vmalloc_addr(addr))
+ vfree(addr);
+ else
+ kfree(addr);
+}
+
static void kvm_destroy_dirty_bitmap(struct kvm_memory_slot *memslot)
{
if (!memslot->dirty_bitmap)
return;
- if (2 * kvm_dirty_bitmap_bytes(memslot) > PAGE_SIZE)
- vfree(memslot->dirty_bitmap);
- else
- kfree(memslot->dirty_bitmap);
-
+ kvm_kvfree(memslot->dirty_bitmap);
memslot->dirty_bitmap = NULL;
}
@@ -617,11 +633,7 @@ static int kvm_create_dirty_bitmap(struct kvm_memory_slot *memslot)
#ifndef CONFIG_S390
unsigned long dirty_bytes = 2 * kvm_dirty_bitmap_bytes(memslot);
- if (dirty_bytes > PAGE_SIZE)
- memslot->dirty_bitmap = vzalloc(dirty_bytes);
- else
- memslot->dirty_bitmap = kzalloc(dirty_bytes, GFP_KERNEL);
-
+ memslot->dirty_bitmap = kvm_kvzalloc(dirty_bytes);
if (!memslot->dirty_bitmap)
return -ENOMEM;
@@ -1586,7 +1598,7 @@ void kvm_vcpu_on_spin(struct kvm_vcpu *me)
*/
for (pass = 0; pass < 2 && !yielded; pass++) {
kvm_for_each_vcpu(i, vcpu, kvm) {
- if (!pass && i < last_boosted_vcpu) {
+ if (!pass && i <= last_boosted_vcpu) {
i = last_boosted_vcpu;
continue;
} else if (pass && i > last_boosted_vcpu)
@@ -2213,7 +2225,7 @@ static long kvm_dev_ioctl_check_extension_generic(long arg)
case KVM_CAP_SIGNAL_MSI:
#endif
return 1;
-#ifdef CONFIG_HAVE_KVM_IRQCHIP
+#ifdef KVM_CAP_IRQ_ROUTING
case KVM_CAP_IRQ_ROUTING:
return KVM_MAX_IRQ_ROUTES;
#endif