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    SubjectRe: [kvm-devel] include files for kvmclock
    On 11/6/07, Glauber de Oliveira Costa <gcosta@redhat.com> wrote:
    > This patch introduces the include files for kvm clock.
    > They'll be needed for both guest and host part.

    And of course, this was my test files by mistake ;-)
    Oh god... ;-)

    Patches aren't numbered but this one should go first. And please just ignore,
    the replica of the hv_clock union definition in the patch bellow. It
    should all go in asm/kvm_para.h

    The other two patches are fine, and can be applied in any order, so
    it's not worth resending. I'll grab your comments first.

    > Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
    > ---
    > include/asm-x86/kvm_para.h | 23 +++++++++++++++++++++++
    > include/linux/kvm.h | 1 +
    > include/linux/kvm_para.h | 20 ++++++++++++++++++++
    > 3 files changed, 44 insertions(+), 0 deletions(-)
    >
    > diff --git a/include/asm-x86/kvm_para.h b/include/asm-x86/kvm_para.h
    > index c6f3fd8..af9fb75 100644
    > --- a/include/asm-x86/kvm_para.h
    > +++ b/include/asm-x86/kvm_para.h
    > @@ -10,15 +10,38 @@
    > * paravirtualization, the appropriate feature bit should be checked.
    > */
    > #define KVM_CPUID_FEATURES 0x40000001
    > +#define KVM_FEATURE_CLOCKEVENTS 0
    > +#define KVM_FEATURE_CLOCKSOURCE 1
    > +
    >
    > #ifdef __KERNEL__
    > #include <asm/processor.h>
    > +extern void kvmclock_init(void);
    > +
    > +union kvm_hv_clock {
    > + struct {
    > + u64 tsc_mult;
    > + u64 now_ns;
    > + /* That's the wall clock, not the water closet */
    > + u64 wc_sec;
    > + u64 wc_nsec;
    > + u64 last_tsc;
    > + /* At first, we could use the tsc value as a marker, but Jeremy
    > + * well noted that it will cause us locking problems in 32-bit
    > + * sys, so we have a special version field */
    > + u32 version;
    > + };
    > + char page_align[PAGE_SIZE];
    > +};
    > +
    >
    > /* This instruction is vmcall. On non-VT architectures, it will generate a
    > * trap that we will then rewrite to the appropriate instruction.
    > */
    > #define KVM_HYPERCALL ".byte 0x0f,0x01,0xc1"
    >
    > +#define KVM_HCALL_REGISTER_CLOCK 1
    > +
    > /* For KVM hypercalls, a three-byte sequence of either the vmrun or the vmmrun
    > * instruction. The hypervisor may replace it with something else but only the
    > * instructions are guaranteed to be supported.
    > diff --git a/include/linux/kvm.h b/include/linux/kvm.h
    > index 71d33d6..7ac8786 100644
    > --- a/include/linux/kvm.h
    > +++ b/include/linux/kvm.h
    > @@ -359,6 +359,7 @@ struct kvm_signal_mask {
    > #define KVM_CAP_MMU_SHADOW_CACHE_CONTROL 2
    > #define KVM_CAP_USER_MEMORY 3
    > #define KVM_CAP_SET_TSS_ADDR 4
    > +#define KVM_CAP_CLK 5
    >
    > /*
    > * ioctls for VM fds
    > diff --git a/include/linux/kvm_para.h b/include/linux/kvm_para.h
    > index e4db25f..567a192 100644
    > --- a/include/linux/kvm_para.h
    > +++ b/include/linux/kvm_para.h
    > @@ -11,8 +11,28 @@
    >
    > /* Return values for hypercalls */
    > #define KVM_ENOSYS 1000
    > +#define KVM_ENODEV 1019
    > +#define KVM_EINVAL 1022
    >
    > #ifdef __KERNEL__
    > +#define KVM_HCALL_REGISTER_CLOCK 1
    > +
    > +union kvm_hv_clock {
    > + struct {
    > + u64 tsc_mult;
    > + u64 now_ns;
    > + /* That's the wall clock, not the water closet */
    > + u64 wc_sec;
    > + u64 wc_nsec;
    > + u64 last_tsc;
    > + /* At first, we could use the tsc value as a marker, but Jeremy
    > + * well noted that it will cause us locking problems in 32-bit
    > + * sys, so we have a special version field */
    > + u32 version;
    > + };
    > + char page_align[PAGE_SIZE];
    > +};
    > +
    > /*
    > * hypercalls use architecture specific
    > */
    > --
    > 1.5.0.6
    >
    >
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    --
    Glauber de Oliveira Costa.
    "Free as in Freedom"
    http://glommer.net

    "The less confident you are, the more serious you have to act."
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