experimental code part 2 (KVM kernel)
-------------------------------------
This code introduces two new ioctl commands KVM_CREATE_PMTMR and
KVM_CONFIGURE_PMTMR plus the new capability KVM_CAP_PMTMR to the
ioctl infrastructure of the KVM kernel. This code utilizes some
helper functions introduced by code part 1.
diff -up ./arch/x86/include/asm/kvm.h.orig2 ./arch/x86/include/asm/kvm.h
--- ./arch/x86/include/asm/kvm.h.orig2 2010-12-05 09:35:17.000000000 +0100
+++ ./arch/x86/include/asm/kvm.h 2010-12-10 12:32:47.067686432 +0100
@@ -24,6 +24,7 @@
#define __KVM_HAVE_DEBUGREGS
#define __KVM_HAVE_XSAVE
#define __KVM_HAVE_XCRS
+#define __KVM_HAVE_PMTMR
/* Architectural interrupt line count. */
#define KVM_NR_INTERRUPTS 256
diff -up ./arch/x86/kvm/x86.c.orig2 ./arch/x86/kvm/x86.c
--- ./arch/x86/kvm/x86.c.orig2 2010-12-05 09:35:17.000000000 +0100
+++ ./arch/x86/kvm/x86.c 2010-12-10 12:24:58.083739549 +0100
@@ -26,6 +26,9 @@
#include "tss.h"
#include "kvm_cache_regs.h"
#include "x86.h"
+#ifdef KVM_CAP_PMTMR
+#include "pmtmr.h"
+#endif
#include <linux/clocksource.h>
#include <linux/interrupt.h>
@@ -1965,6 +1968,9 @@ int kvm_dev_ioctl_check_extension(long e
case KVM_CAP_X86_ROBUST_SINGLESTEP:
case KVM_CAP_XSAVE:
case KVM_CAP_ASYNC_PF:
+#ifdef KVM_CAP_PMTMR
+ case KVM_CAP_PMTMR:
+#endif
r = 1;
break;
case KVM_CAP_COALESCED_MMIO:
@@ -3274,6 +3280,7 @@ long kvm_arch_vm_ioctl(struct file *filp
struct kvm_pit_state ps;
struct kvm_pit_state2 ps2;
struct kvm_pit_config pit_config;
+ struct kvm_pmtmr_config pmtmr_config;
} u;
switch (ioctl) {
@@ -3541,6 +3548,23 @@ long kvm_arch_vm_ioctl(struct file *filp
r = 0;
break;
}
+#ifdef KVM_CAP_PMTMR
+ case KVM_CREATE_PMTMR: {
+ mutex_lock(&kvm->slots_lock);
+ r = kvm_create_pmtmr(kvm);
+ mutex_unlock(&kvm->slots_lock);
+ break;
+ }
+ case KVM_CONFIGURE_PMTMR: {
+ r = -EFAULT;
+ if (copy_from_user(&u.pmtmr_config, argp,
+ sizeof(struct kvm_pmtmr_config)))
+ goto out;
+
+ r = kvm_configure_pmtmr(kvm, &u.pmtmr_config);
+ break;
+ }
+#endif
default:
;
diff -up ./include/linux/kvm.h.orig2 ./include/linux/kvm.h
--- ./include/linux/kvm.h.orig2 2010-12-05 09:35:17.000000000 +0100
+++ ./include/linux/kvm.h 2010-12-10 12:30:13.677745093 +0100
@@ -140,6 +140,12 @@ struct kvm_pit_config {
__u32 pad[15];
};
+/* for KVM_CONFIGURE_PMTMR */
+struct kvm_pmtmr_config {
+ __u64 pm_io_base;
+ __s64 clock_offset;
+};
+
#define KVM_PIT_SPEAKER_DUMMY 1
#define KVM_EXIT_UNKNOWN 0
@@ -541,6 +547,9 @@ struct kvm_ppc_pvinfo {
#define KVM_CAP_PPC_GET_PVINFO 57
#define KVM_CAP_PPC_IRQ_LEVEL 58
#define KVM_CAP_ASYNC_PF 59
+#ifdef __KVM_HAVE_PMTMR
+#define KVM_CAP_PMTMR 60
+#endif
#ifdef KVM_CAP_IRQ_ROUTING
@@ -672,6 +681,8 @@ struct kvm_clock_data {
#define KVM_XEN_HVM_CONFIG _IOW(KVMIO, 0x7a, struct kvm_xen_hvm_config)
#define KVM_SET_CLOCK _IOW(KVMIO, 0x7b, struct kvm_clock_data)
#define KVM_GET_CLOCK _IOR(KVMIO, 0x7c, struct kvm_clock_data)
+#define KVM_CREATE_PMTMR _IO(KVMIO, 0x7d)
+#define KVM_CONFIGURE_PMTMR _IOW(KVMIO, 0x7e, struct kvm_pmtmr_config)
/* Available with KVM_CAP_PIT_STATE2 */
#define KVM_GET_PIT2 _IOR(KVMIO, 0x9f, struct kvm_pit_state2)
#define KVM_SET_PIT2 _IOW(KVMIO, 0xa0, struct kvm_pit_state2)
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