From: Sheng Yang <[EMAIL PROTECTED]>
Signed-off-by: Sheng Yang <[EMAIL PROTECTED]>
Signed-off-by: Avi Kivity <[EMAIL PROTECTED]>
diff --git a/libkvm/libkvm-x86.c b/libkvm/libkvm-x86.c
index b3a241e..d19d17f 100644
--- a/libkvm/libkvm-x86.c
+++ b/libkvm/libkvm-x86.c
@@ -630,3 +630,12 @@ int kvm_disable_tpr_access_reporting(kvm_context_t kvm,
int vcpu)
}
#endif
+
+int kvm_pit_in_kernel(kvm_context_t kvm)
+{
+#ifdef KVM_CAP_PIT
+ return kvm->pit_in_kernel;
+#else
+ return 0;
+#endif
+}
diff --git a/qemu/hw/i8254.c b/qemu/hw/i8254.c
index c281680..9e18ebc 100644
--- a/qemu/hw/i8254.c
+++ b/qemu/hw/i8254.c
@@ -26,6 +26,8 @@
#include "isa.h"
#include "qemu-timer.h"
+#include "qemu-kvm.h"
+
//#define DEBUG_PIT
#define RW_STATE_LSB 1
@@ -491,10 +493,12 @@ PITState *pit_init(int base, qemu_irq irq)
PITState *pit = &pit_state;
PITChannelState *s;
- s = &pit->channels[0];
- /* the timer 0 is connected to an IRQ */
- s->irq_timer = qemu_new_timer(vm_clock, pit_irq_timer, s);
- s->irq = irq;
+ if (!kvm_enabled() || !qemu_kvm_pit_in_kernel()) {
+ s = &pit->channels[0];
+ /* the timer 0 is connected to an IRQ */
+ s->irq_timer = qemu_new_timer(vm_clock, pit_irq_timer, s);
+ s->irq = irq;
+ }
register_savevm("i8254", base, 1, pit_save, pit_load, pit);
diff --git a/qemu/qemu-kvm.c b/qemu/qemu-kvm.c
index 45fddd3..4d59b39 100644
--- a/qemu/qemu-kvm.c
+++ b/qemu/qemu-kvm.c
@@ -10,6 +10,7 @@
int kvm_allowed = 1;
int kvm_irqchip = 1;
+int kvm_pit = 1;
#include <string.h>
#include "hw/hw.h"
@@ -544,6 +545,9 @@ int kvm_qemu_create_context(void)
if (!kvm_irqchip) {
kvm_disable_irqchip_creation(kvm_context);
}
+ if (!kvm_pit) {
+ kvm_disable_pit_creation(kvm_context);
+ }
if (kvm_create(kvm_context, phys_ram_size, (void**)&phys_ram_base) < 0) {
kvm_qemu_destroy();
return -1;
diff --git a/qemu/qemu-kvm.h b/qemu/qemu-kvm.h
index 8e45f30..ff9c86e 100644
--- a/qemu/qemu-kvm.h
+++ b/qemu/qemu-kvm.h
@@ -84,9 +84,11 @@ extern kvm_context_t kvm_context;
#define kvm_enabled() (kvm_allowed)
#define qemu_kvm_irqchip_in_kernel() kvm_irqchip_in_kernel(kvm_context)
+#define qemu_kvm_pit_in_kernel() kvm_pit_in_kernel(kvm_context)
#else
#define kvm_enabled() (0)
#define qemu_kvm_irqchip_in_kernel() (0)
+#define qemu_kvm_pit_in_kernel() (0)
#endif
#endif
diff --git a/qemu/vl.c b/qemu/vl.c
index 4762cb0..21c9b53 100644
--- a/qemu/vl.c
+++ b/qemu/vl.c
@@ -8097,6 +8097,7 @@ static void help(int exitcode)
"-no-kvm disable KVM hardware virtualization\n"
#endif
"-no-kvm-irqchip disable KVM kernel mode PIC/IOAPIC/LAPIC\n"
+ "-no-kvm-pit disable KVM kernel mode PIT\n"
#endif
#ifdef TARGET_I386
"-std-vga simulate a standard VGA card with VESA Bochs
Extensions\n"
@@ -8219,6 +8220,7 @@ enum {
QEMU_OPTION_curses,
QEMU_OPTION_no_kvm,
QEMU_OPTION_no_kvm_irqchip,
+ QEMU_OPTION_no_kvm_pit,
QEMU_OPTION_no_reboot,
QEMU_OPTION_show_cursor,
QEMU_OPTION_daemonize,
@@ -8305,6 +8307,7 @@ const QEMUOption qemu_options[] = {
{ "no-kvm", 0, QEMU_OPTION_no_kvm },
#endif
{ "no-kvm-irqchip", 0, QEMU_OPTION_no_kvm_irqchip },
+ { "no-kvm-pit", 0, QEMU_OPTION_no_kvm_pit },
#endif
#if defined(TARGET_PPC) || defined(TARGET_SPARC)
{ "g", 1, QEMU_OPTION_g },
@@ -9238,8 +9241,14 @@ int main(int argc, char **argv)
kvm_allowed = 0;
break;
case QEMU_OPTION_no_kvm_irqchip: {
- extern int kvm_irqchip;
+ extern int kvm_irqchip, kvm_pit;
kvm_irqchip = 0;
+ kvm_pit = 0;
+ break;
+ }
+ case QEMU_OPTION_no_kvm_pit: {
+ extern int kvm_pit;
+ kvm_pit = 0;
break;
}
#endif
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