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  1. 10 9月, 2009 8 次提交
  3. 10 6月, 2009 20 次提交
  5. 24 3月, 2009 12 次提交
    • G
      KVM: Report IRQ injection status to userspace. · 4925663a
      由 Gleb Natapov 提交于 
      IRQ injection status is either -1 (if there was no CPU found
that should except the interrupt because IRQ was masked or
ioapic was misconfigured or ...) or >= 0 in that case the
number indicates to how many CPUs interrupt was injected.
If the value is 0 it means that the interrupt was coalesced
and probably should be reinjected.
Signed-off-by: NGleb Natapov <gleb@redhat.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>
      4925663a
    • A
      KVM: MMU: Rename "metaphysical" attribute to "direct" · f6e2c02b
      由 Avi Kivity 提交于 
      This actually describes what is going on, rather than alerting the reader
that something strange is going on.
Signed-off-by: NAvi Kivity <avi@redhat.com>
      f6e2c02b
    • A
      KVM: Move struct kvm_pio_request into x86 kvm_host.h · 1c08364c
      由 Avi Kivity 提交于 
      This is an x86 specific stucture and has no business living in common code.
Signed-off-by: NAvi Kivity <avi@redhat.com>
      1c08364c
    • I
      KVM: introduce kvm_read_guest_virt, kvm_write_guest_virt · 77c2002e
      由 Izik Eidus 提交于 
      This commit change the name of emulator_read_std into kvm_read_guest_virt,
and add new function name kvm_write_guest_virt that allow writing into a
guest virtual address.
Signed-off-by: NIzik Eidus <ieidus@redhat.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>
      77c2002e
    • M
      KVM: VMX: initialize TSC offset relative to vm creation time · 53f658b3
      由 Marcelo Tosatti 提交于 
      VMX initializes the TSC offset for each vcpu at different times, and
also reinitializes it for vcpus other than 0 on APIC SIPI message.

This bug causes the TSC's to appear unsynchronized in the guest, even if
the host is good.

Older Linux kernels don't handle the situation very well, so
gettimeofday is likely to go backwards in time:

http://www.mail-archive.com/kvm@vger.kernel.org/msg02955.html
http://sourceforge.net/tracker/index.php?func=detail&aid=2025534&group_id=180599&atid=893831

Fix it by initializating the offset of each vcpu relative to vm creation
time, and moving it from vmx_vcpu_reset to vmx_vcpu_setup, out of the
APIC MP init path.
Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>
      53f658b3
    • A
      KVM: MMU: Segregate mmu pages created with different cr4.pge settings · 2f0b3d60
      由 Avi Kivity 提交于 
      Don't allow a vcpu with cr4.pge cleared to use a shadow page created with
cr4.pge set; this might cause a cr3 switch not to sync ptes that have the
global bit set (the global bit has no effect if !cr4.pge).

This can only occur on smp with different cr4.pge settings for different
vcpus (since a cr4 change will resync the shadow ptes), but there's no
cost to being correct here.
Signed-off-by: NAvi Kivity <avi@redhat.com>
      2f0b3d60
    • A
      KVM: MMU: Inherit a shadow page's guest level count from vcpu setup · a770f6f2
      由 Avi Kivity 提交于 
      Instead of "calculating" it on every shadow page allocation, set it once
when switching modes, and copy it when allocating pages.

This doesn't buy us much, but sets up the stage for inheriting more
information related to the mmu setup.
Signed-off-by: NAvi Kivity <avi@redhat.com>
      a770f6f2
    • J
      KVM: x86: Virtualize debug registers · 42dbaa5a
      由 Jan Kiszka 提交于 
      So far KVM only had basic x86 debug register support, once introduced to
realize guest debugging that way. The guest itself was not able to use
those registers.

This patch now adds (almost) full support for guest self-debugging via
hardware registers. It refactors the code, moving generic parts out of
SVM (VMX was already cleaned up by the KVM_SET_GUEST_DEBUG patches), and
it ensures that the registers are properly switched between host and
guest.

This patch also prepares debug register usage by the host. The latter
will (once wired-up by the following patch) allow for hardware
breakpoints/watchpoints in guest code. If this is enabled, the guest
will only see faked debug registers without functionality, but with
content reflecting the guest's modifications.

Tested on Intel only, but SVM /should/ work as well, but who knows...

Known limitations: Trapping on tss switch won't work - most probably on
Intel.

Credits also go to Joerg Roedel - I used his once posted debugging
series as platform for this patch.
Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>
      42dbaa5a
    • J
      KVM: New guest debug interface · d0bfb940
      由 Jan Kiszka 提交于 
      This rips out the support for KVM_DEBUG_GUEST and introduces a new IOCTL
instead: KVM_SET_GUEST_DEBUG. The IOCTL payload consists of a generic
part, controlling the "main switch" and the single-step feature. The
arch specific part adds an x86 interface for intercepting both types of
debug exceptions separately and re-injecting them when the host was not
interested. Moveover, the foundation for guest debugging via debug
registers is layed.

To signal breakpoint events properly back to userland, an arch-specific
data block is now returned along KVM_EXIT_DEBUG. For x86, the arch block
contains the PC, the debug exception, and relevant debug registers to
tell debug events properly apart.

The availability of this new interface is signaled by
KVM_CAP_SET_GUEST_DEBUG. Empty stubs for not yet supported archs are
provided.

Note that both SVM and VTX are supported, but only the latter was tested
yet. Based on the experience with all those VTX corner case, I would be
fairly surprised if SVM will work out of the box.
Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>
      d0bfb940
    • A
      KVM: SVM: Add VMRUN handler · 3d6368ef
      由 Alexander Graf 提交于 
      This patch implements VMRUN. VMRUN enters a virtual CPU and runs that
in the same context as the normal guest CPU would run.
So basically it is implemented the same way, a normal CPU would do it.

We also prepare all intercepts that get OR'ed with the original
intercepts, as we do not allow a level 2 guest to be intercepted less
than the first level guest.

v2 implements the following improvements:

- fixes the CPL check
- does not allocate iopm when not used
- remembers the host's IF in the HIF bit in the hflags

v3:

- make use of the new permission checking
- add support for V_INTR_MASKING_MASK

v4:

- use host page backed hsave

v5:

- remove IOPM merging code

v6:

- save cr4 so PAE l1 guests work

v7:

- return 0 on vmrun so we check the MSRs too
- fix MSR check to use the correct variable
Acked-by: NJoerg Roedel <joro@8bytes.org>
Signed-off-by: NAlexander Graf <agraf@suse.de>
Signed-off-by: NAvi Kivity <avi@redhat.com>
      3d6368ef
    • A
      KVM: SVM: Implement GIF, clgi and stgi · 1371d904
      由 Alexander Graf 提交于 
      This patch implements the GIF flag and the clgi and stgi instructions that
set this flag. Only if the flag is set (default), interrupts can be received by
the CPU.

To keep the information about that somewhere, this patch adds a new hidden
flags vector. that is used to store information that does not go into the
vmcb, but is SVM specific.

I tried to write some code to make -no-kvm-irqchip work too, but the first
level guest won't even boot with that atm, so I ditched it.

v2 moves the hflags to x86 generic code
v3 makes use of the new permission helper
v6 only enables interrupt_window if GIF=1
Acked-by: NJoerg Roedel <joro@8bytes.org>
Signed-off-by: NAlexander Graf <agraf@suse.de>
Signed-off-by: NAvi Kivity <avi@redhat.com>
      1371d904
    • A
      KVM: SVM: Move EFER and MSR constants to generic x86 code · 9962d032
      由 Alexander Graf 提交于 
      MSR_EFER_SVME_MASK, MSR_VM_CR and MSR_VM_HSAVE_PA are set in KVM
specific headers. Linux does have nice header files to collect
EFER bits and MSR IDs, so IMHO we should put them there.

While at it, I also changed the naming scheme to match that
of the other defines.

(introduced in v6)
Acked-by: NJoerg Roedel <joro@8bytes.org>
Signed-off-by: NAlexander Graf <agraf@suse.de>
Signed-off-by: NAvi Kivity <avi@redhat.com>
      9962d032