On 2014-07-08 06:17, Alok Kataria wrote:
> Thanks Jan and Paolo for looking at the change, I have added a comment
> in svm_get_segment. Joerg, please consider this for the next merge.
>
> --
>
> From: Jim Mattson
>
> We have noticed that qemu-kvm hangs early in the BIOS when runnning nested
> u
/me reminds you of 78 char text wrap.
On Wed, Jul 09, 2014 at 07:32:09PM +, Liang, Kan wrote:
> > Sure; but what I meant was, check_msr() is broken when ran on such a
> > kernel. You need to fix check_msr() to return failure on these 'ignored'
> > MSRs, after all they don't function as expecte
On Wed, Jul 09, 2014 at 06:26:23PM +0200, Paolo Bonzini wrote:
> Il 26/06/2014 14:22, Matthias Lange ha scritto:
> >Linux' AMD MCE code tries to read from the MC4_MISC1 (0xc408) MSR.
> >Because
> >this read is not virtualized within KVM, a GPE is injected into the guest.
> >This patch handles
We have two arrays in kvm_host_state that contain register values for
the PMU. Currently we only create an asm-offsets symbol for the base of
the arrays, and do the array offset in the assembly code.
Creating an asm-offsets symbol for each field individually makes the
code much nicer to read, part
On 10.07.14 11:34, Michael Ellerman wrote:
We have two arrays in kvm_host_state that contain register values for
the PMU. Currently we only create an asm-offsets symbol for the base of
the arrays, and do the array offset in the assembly code.
Creating an asm-offsets symbol for each field indivi
This is a note to let you know that I have just added a patch titled
MIPS: KVM: Remove redundant NULL checks before kfree()
to the linux-3.11.y-queue branch of the 3.11.y.z extended stable tree
which can be found at:
http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/
On 17 June 2014 23:10, James Hogan wrote:
> The patchset depends on v4 of "target-mips: implement UserLocal
> Register". I'm aiming for QEMU 2.1, hopefully it isn't too late to get
> some final review.
>
> Thanks to everybody who has already taken part in review.
>
> This patchset implements KVM s
Il 10/07/2014 10:55, Jan Kiszka ha scritto:
>> > + /*
>> > + * SVM spec doesn't require the platform to track the G bit for all
>> > + * segments, so similar to CS, let's synthesize this bit for all
>> > + * segments.
> Either I misunderstand the reference to CS or it does no longer apply
>
Il 10/07/2014 14:17, Peter Maydell ha scritto:
More generally, there doesn't really seem to be provision in the
KVM KVM_EXIT_MMIO API for returning "this access failed".
I guess in theory userspace could do all the "figure out how
to adjust CPU state to do exception entry and then run VCPU",
but
From: David Hildenbrand
Let's move the finalization of SIGP STOP and SIGP STOP AND STORE STATUS orders
to
the point where the VCPU is actually stopped.
This change is needed to prepare for a user space driven VCPU state change. The
action_bits may only be cleared when setting the cpu state to S
Paolo,
here is a preview of a rework of CPU state on s390x. Since we extend
MP_STATE I wanted to send an RFC upfront. I will wait for some feedback
and send a proper pull request in the next week:
-
This series enables the "KVM_SET_MP_STATE" ioctl on s390 to make the cpu
state settable by u
From: David Hildenbrand
The function "__cpu_is_stopped" is not used any more. Let's remove it and
expose the function "is_vcpu_stopped" instead, which is actually what we want.
This patch also converts an open coded check for CPUSTAT_STOPPED to
is_vcpu_stopped().
Signed-off-by: David Hildenbran
This is the qemu part of kernel series "Let user space control the
cpu states"
Christian Borntraeger (1):
update linux headers with with cpustate changes
David Hildenbrand (4):
s390x/kvm: introduce proper states for s390 cpus
s390x/kvm: proper use of the cpu states OPERATING and STOPPED
s
From: David Hildenbrand
A SIGP STOP (AND STORE STATUS) order is complete as soon as the VCPU has been
stopped. This patch makes sure that only one SIGP STOP (AND STORE STATUS) may
be pending at a time (as defined by the architecture). If the action_bits are
still set, a SIGP STOP has been issued
From: David Hildenbrand
Highlight the aspects of the ioctls that are actually specific to x86
and ia64. As defined restrictions (irqchip) and mp states may not apply
to other architectures, these parts are flagged to belong to x86 and ia64.
In preparation for the use of KVM_(S|G)ET_MP_STATE by s
From: David Hildenbrand
Until now, when a s390 cpu was stopped or halted, the number of running
CPUs was tracked in a global variable. This was problematic for migration,
so Jason came up with a per-cpu running state.
As it turns out, we want to track the full logical state of a target vcpu,
so w
From: David Hildenbrand
If a cpu is stopped, it must never be allowed to run and no interrupt may wake
it
up. A cpu also has to be unhalted if it is halted and has work to do - this
scenario wasn't hit in kvm case yet, as only "disabled wait" is processed within
QEMU.
Signed-off-by: David Hilde
From: David Hildenbrand
This patch makes sure that halting a cpu and stopping a cpu are two different
things. Stopping a cpu will also set the cpu halted - this is needed for common
infrastructure to work (note that the stop and stopped flag cannot be used for
our purpose because they are already
From: David Hildenbrand
Let QEMU propagate the cpu state to kvm. If kvm doesn't yet support it, it is
silently ignored as kvm will still handle the cpu state itself in that case.
The state is not synced back, thus kvm won't have a chance to actively modify
the cpu state. To do so, control has to
From: David Hildenbrand
This patch
- adds s390 specific MP states to linux headers and documents them
- implements the KVM_{SET,GET}_MP_STATE ioctls
- enables KVM_CAP_MP_STATE
- allows user space to control the VCPU state on s390.
If user space sets the VCPU state using the ioctl KVM_SET_MP_STAT
Will do a proper headers sync when ready
Signed-off-by: Christian Borntraeger
---
linux-headers/linux/kvm.h | 7 ++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/linux-headers/linux/kvm.h b/linux-headers/linux/kvm.h
index f5d2c38..9b584da 100644
--- a/linux-headers/linux/kvm.
> This is the qemu part of kernel series "Let user space control the
> cpu states"
>
> Christian Borntraeger (1):
> update linux headers with with cpustate changes
>
> David Hildenbrand (4):
> s390x/kvm: introduce proper states for s390 cpus
> s390x/kvm: proper use of the cpu states OPERATI
> This is the qemu part of kernel series "Let user space control the
> cpu states"
>
> Christian Borntraeger (1):
> update linux headers with with cpustate changes
>
> David Hildenbrand (4):
> s390x/kvm: introduce proper states for s390 cpus
> s390x/kvm: proper use of the cpu states OPERATI
> > This is the qemu part of kernel series "Let user space control the
> > cpu states"
> >
> > Christian Borntraeger (1):
> > update linux headers with with cpustate changes
> >
> > David Hildenbrand (4):
> > s390x/kvm: introduce proper states for s390 cpus
> > s390x/kvm: proper use of the
When userspace loads code and data in a read-only memory regions, KVM
needs to be able to handle this on arm and arm64. Specifically this is
used when running code directly from a read-only flash device; the
common scenario is a UEFI blob loaded with the -bios option in QEMU.
To avoid looking thr
From: Alex Bennée
When we have a problem syncing CP registers between kvm<->qemu it's a
lot more useful to have the names of the registers in the log than just
a random abort() and core dump.
Signed-off-by: Alex Bennée
---
v2
- less verbose log message
- fix checkpatch warnings
diff --git
Before we launch a guest we query KVM for the list of "co-processor"
registers it knows about which is used later for save/restore of machine
state. The logic is identical for both 32-bit and 64-bit so I've moved
it all into the common code and simplified the exit paths (as failure =>
exit).
This
While trying to get Mac-on-Linux to work on a POWER7 box I stumbled over two
issues in our book3s_32 MMU emulation. With these issues fixed and a hack to
disable magic page mapping (very hard to get right with 64k pages in this case)
I can successfully run Mac OS X guests on a POWER7 host.
Alex
A
When we have a page that we're not allowed to write to, xlate() will already
tell us -EPERM on lookup of that page. With the code as is we change it into
a "page missing" error which a guest may get confused about. Instead, just
tell the caller about the -EPERM directly.
This fixes Mac OS X guests
When a page lookup failed because we're not allowed to write to the page, we
should not overwrite that value with another lookup on the second PTEG which
will return "page not found". Instead, we should just tell the caller that we
had a permission problem.
This fixes Mac OS X guests looping endle
From: Kan Liang
x86, perf: Protect LBR and extra_regs against KVM lying
With -cpu host, KVM reports LBR and extra_regs support, if the host has support.
When the guest perf driver tries to access LBR or extra_regs MSR,
it #GPs all MSR accesses,since KVM doesn't handle LBR and extra_regs support.
From: Kan Liang
With -cpu host KVM reports LBR and extra_regs support, so the perf driver may
accesses the LBR and extra_regs MSRs.
However, there is no LBR and extra_regs virtualization support yet. This could
causes guest to crash.
As a workaround, KVM just simply ignore the LBR and extra_reg
On Wed, Jul 09, 2014 at 11:17:04AM -0500, Joel Schopp wrote:
> The current calculation for VTTBR_BADDR_MASK masks only 39 bits and not
> all 40 bits. That last bit is important as some systems allocate
> from near the top of the available address space.
>
> This patch is necessary to run KVM on a
On 07/10/2014 03:25 PM, Christoffer Dall wrote:
> On Wed, Jul 09, 2014 at 11:17:04AM -0500, Joel Schopp wrote:
>> The current calculation for VTTBR_BADDR_MASK masks only 39 bits and not
>> all 40 bits. That last bit is important as some systems allocate
>> from near the top of the available addre
On 07/10/2014 04:02 PM, Joel Schopp wrote:
> On 07/10/2014 03:25 PM, Christoffer Dall wrote:
>> On Wed, Jul 09, 2014 at 11:17:04AM -0500, Joel Schopp wrote:
>>> The current calculation for VTTBR_BADDR_MASK masks only 39 bits and not
>>> all 40 bits. That last bit is important as some systems allo
Current implementation of helper function pci_vfs_assigned() is a little
complex, to
get sum of VFs that assigned to VM, access low level configuration space
register and
then loop in traversing device tree.
This patch introduce an atomic reference counter for VFs that assigned to VM in
struct
New VFs reference counter mechanism and VFs assignment helper functions are
introduced to
PCI SRIOV, use them instead of manipulating device flag directly.
Signed-off-by: Ethan Zhao
---
drivers/xen/xen-pciback/pci_stub.c |4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)
diff --git
New VFs reference counter mechanism and VFs assignment helper functions are
introduced to
PCI SRIOV, use them instead of manipulating device flag directly.
Signed-off-by: Ethan Zhao
---
drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 17 ++---
1 files changed, 2 insertions(+)
New VFs reference counter mechanism and VFs assignment helper functions are
introduced to
PCI SRIOV, use them instead of manipulating device flag directly.
Signed-off-by: Ethan Zhao
---
virt/kvm/assigned-dev.c |2 +-
virt/kvm/iommu.c|4 ++--
2 files changed, 3 insertions(+), 3 d
Today we handle split real mode by mapping both instruction and data faults
into a special virtual address space that only exists during the split mode
phase.
This is good enough to catch 32bit Linux guests that use split real mode for
copy_from/to_user. In this case we're always prefixed with 0xc
Since there's no 0th patch, I guess I'll comment here. This series is
not bisectable, patch 1 breaks the existing implementation. I'd
suggest:
patch 1 - fix i40e
patch 2 - create assign/deassign that uses dev_flags
patch 3 - convert users to new interface
patch 4 - convert interface to use atom
Alex,
Thanks for your reviewing, when I create the patch order, I thought
about the question you concerned for
quit a while, make every patch be independent to each other as possible
as I could, so we can do bisect when hit
problem.
I manage to take more time to figure out better patch o
On Fri, 2014-07-11 at 10:10 +0800, ethan zhao wrote:
> Alex,
> Thanks for your reviewing, when I create the patch order, I thought
> about the question you concerned for
> quit a while, make every patch be independent to each other as possible
> as I could, so we can do bisect when hit
> prob
On 2014/7/11 10:22, Alex Williamson wrote:
On Fri, 2014-07-11 at 10:10 +0800, ethan zhao wrote:
Alex,
Thanks for your reviewing, when I create the patch order, I thought
about the question you concerned for
quit a while, make every patch be independent to each other as possible
as I could,
On Fri, 2014-07-11 at 10:29 +0800, ethan zhao wrote:
> On 2014/7/11 10:22, Alex Williamson wrote:
> > On Fri, 2014-07-11 at 10:10 +0800, ethan zhao wrote:
> >> Alex,
> >> Thanks for your reviewing, when I create the patch order, I thought
> >> about the question you concerned for
> >> quit a w
reply me on the email id below for explanation of better opportunity for us.
email: chnsnn...@gmail.com
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On 2014/7/11 10:33, Alex Williamson wrote:
On Fri, 2014-07-11 at 10:29 +0800, ethan zhao wrote:
On 2014/7/11 10:22, Alex Williamson wrote:
On Fri, 2014-07-11 at 10:10 +0800, ethan zhao wrote:
Alex,
Thanks for your reviewing, when I create the patch order, I thought
about the question yo
This bug can be trigger by L1 goes down directly w/ enable_shadow_vmcs.
[ 6413.158950] kvm: vmptrld (null)/7800 failed
[ 6413.158954] vmwrite error: reg 401e value 4 (err 1)
[ 6413.158957] CPU: 0 PID: 4840 Comm: qemu-system-x86 Tainted: G OE
3.16.0kvm+ #2
[ 6413.158958
On Thu, 2014-07-10 at 12:16 +0200, Alexander Graf wrote:
> On 10.07.14 11:34, Michael Ellerman wrote:
> > We have two arrays in kvm_host_state that contain register values for
> > the PMU. Currently we only create an asm-offsets symbol for the base of
> > the arrays, and do the array offset in the
Current implementation of helper function pci_vfs_assigned() is a
little complex, to get sum of VFs that assigned to VM, access low
level configuration space register and then loop in traversing
device tree.
This patch introduces an atomic reference counter for VFs those
were assigned to VM in str
This patch introduces two new device assignment functions
pci_sriov_assign_device(),
pci_sriov_deassign_device()
along with the existed one
pci_vfs_assigned()
They construct the VFs assignment management interface, used to assign/
deassign device to VM and query the VFs reference counter. inste
hi Gleb, Marcelo, Nadav,
Would you please help to review these patches ?
Thanks. :)
On 07/08/2014 09:01 PM, Tang Chen wrote:
ept identity pagetable and apic access page in kvm are pinned in memory.
As a result, they cannot be migrated/hot-removed.
But actually they don't need to be pinned in
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