Hi Paolo,
On 01.09.2014 23:04, Paolo Bonzini wrote:
Valentine, can you produce another trace, this time with both kvm and
kvmmmu events enabled?
I was able to make the trace shorter by grepping only what's happening
on a single CPU core (#0):
This provides basic support for the KVM_REG_PPC_ARCH_COMPAT register
in PR KVM. At present the value is sanity-checked when set, but
doesn't actually affect anything yet.
Implementing this makes it possible to use a qemu command-line
argument such as -cpu host,compat=power7 on a POWER8 machine,
Since the guest can read the machine's PVR (Processor Version Register)
directly and see the real value, we should disallow userspace from
setting any value for the guest's PVR other than the real host value.
Therefore this makes kvm_arch_vcpu_set_sregs_hv() check the supplied
PVR value and return
This series of patches is based on Alex Graf's kvm-ppc-queue branch.
It contains 3 small patches from the tree that we are shipping on
POWER8 machines: a fix for an error that we see very occasionally,
and two minor improvements. Please apply for 3.18.
Paul.
---
From: Paul Mackerras pau...@au1.ibm.com
Occasional failures have been seen with split-core mode and migration
where the message KVM: couldn't grab cpu appears. This increases
the length of time that we wait from 1ms to 10ms, which seems to
work around the issue.
Signed-off-by: Paul Mackerras
On 02.09.2014 12:09, Valentine Sinitsyn wrote:
https://www.dropbox.com/s/slbxmxyg74wh9hv/l1mmio-cpu0.txt.gz?dl=0
Forgot to say: the user space is vanilla QEMU 2.1.0 here.
Valentine
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--- Comment #6 from Paolo Bonzini bonz...@gnu.org ---
What version of Xen? Can you attach the xen.gz file?
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On (Mon) 01 Sep 2014 [20:52:46], Zhang Haoyu wrote:
Hi, all
I start a VM with virtio-serial (default ports number: 31), and found
that virtio-blk performance degradation happened, about 25%, this problem
can be reproduced 100%.
without virtio-serial:
4k-read-random 1186 IOPS
Il 01/09/2014 21:21, Valentine Sinitsyn ha scritto:
Can you retry running the tests with the latest kvm-unit-tests (branch
master), gather a trace of kvm and kvmmmu events, and send the
compressed trace.dat my way?
You mean the trace when the problem reveal itself (not from running
tests),
repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux.git
tags/kvm-s390-master-20140902
for you to fetch changes up to 1951497d90d6754201af3e65241a06f9ef6755cd:
KVM: s390/mm: Fix guest storage key corruption in ptep_set_access_flags
(2014-09-02 10:30:43 +0200
commit 0944fe3f4a32 (s390/mm: implement software referenced bits)
triggered another paging/storage key corruption. There is an
unhandled invalid-valid pte change where we have to set the real
storage key from the pgste.
When doing paging a guest page might be swapcache or swap and when
faulted in
Since 3.12 or more precisely commit 0944fe3f4a32 (s390/mm:
implement software referenced bits) guest storage keys get
corrupted during paging. This commit added another valid-invalid
translation for page tables - namely ptep_test_and_clear_young.
We have to transfer the storage key into the pgste
On 02.09.2014 14:25, Paolo Bonzini wrote:
I actually meant kvm-unit-tests in order to understand the npt_rsvd
failure. (I had sent a separate message for Jailhouse).
Oops, sorry for misunderstanding. Uploaded it here:
https://www.dropbox.com/s/jp6ohb0ul3d6v4u/npt_rsvd.txt.bz2?dl=0
The
Hi all,
This is version 3 of the patches originally posted here:
v1: http://www.spinics.net/lists/kvm-arm/msg10219.html
v2: http://www.spinics.net/lists/kvm/msg105197.html
Changes since v2 include:
- Rebased onto 3.17-rc* (the vgic code changed a lot!)
- Added relevant acks
The mpic,
From: Cornelia Huck cornelia.h...@de.ibm.com
Using the new kvm_register_device_ops() interface makes us get rid of
an #ifdef in common code.
Cc: Gleb Natapov g...@kernel.org
Cc: Paolo Bonzini pbonz...@redhat.com
Signed-off-by: Cornelia Huck cornelia.h...@de.ibm.com
Signed-off-by: Will Deacon
kvm_ioctl_create_device currently has knowledge of all the device types
and their associated ops. This is fairly inflexible when adding support
for new in-kernel device emulations, so move what we currently have out
into a table, which can support dynamic registration of ops by new
drivers for
Now that we have a dynamic means to register kvm_device_ops, use that
for the ARM VGIC, instead of relying on the static table.
Cc: Gleb Natapov g...@kernel.org
Cc: Paolo Bonzini pbonz...@redhat.com
Acked-by: Marc Zyngier marc.zyng...@arm.com
Reviewed-by: Christoffer Dall
Now that we have a dynamic means to register kvm_device_ops, use that
for the VFIO kvm device, instead of relying on the static table.
This is achieved by a module_init call to register the ops with KVM.
Cc: Gleb Natapov g...@kernel.org
Cc: Paolo Bonzini pbonz...@redhat.com
Acked-by: Alex
Il 02/09/2014 08:09, Valentine Sinitsyn ha scritto:
https://www.dropbox.com/s/slbxmxyg74wh9hv/l1mmio-cpu0.txt.gz?dl=0
It was taken with kernel 3.16.1 modules with your paging-tmpl.h patch
applied.
This time, the trace looks somewhat different, however my code still
hangs in nested KVM
On 02.09.2014 15:45, Paolo Bonzini wrote:
This *is* different though. I don't see any kvm_inj_exception at all
(with my patch it should be for vector 0xfe).
I've applied the part of your patch, that fixes the uninitialized
exception vector problem, otherwise the lockup will trigger before my
On 02.09.2014 15:45, Paolo Bonzini wrote:
In any case, the problem seems specific to _writes_ to the APIC page.
I'm going to write a testcase for that and see if I can reproduce it now.
If you'll need a complete trace, not only CPU 0, please let me know -
I'll upload it as well. It's about 17M
Il 02/09/2014 11:16, Valentine Sinitsyn ha scritto:
On 02.09.2014 14:25, Paolo Bonzini wrote:
I actually meant kvm-unit-tests in order to understand the npt_rsvd
failure. (I had sent a separate message for Jailhouse).
Oops, sorry for misunderstanding. Uploaded it here:
On 02.09.2014 17:21, Paolo Bonzini wrote:
Ugh, there are many bugs and the test is even wrong because the actual
error code should be 0x20006 (error while visiting page tables).
Well, good they were spotted. :-) Haven't looked at the test code
actually, just saw it fails for some reason.
Il 02/09/2014 11:53, Valentine Sinitsyn ha scritto:
real_gpa = mmu-translate_gpa(vcpu, gfn_to_gpa(gfn), access);
if (real_gpa == UNMAPPED_GVA)
-return 0;
+goto error;
walker-gfn = real_gpa PAGE_SHIFT;
So they should look like regular page faults (as they
Juan Quintela quint...@redhat.com wrote:
Hi
Please, send any topic that you are interested in covering.
As there are no topics, call gets cancelled.
Have a nice day, Juan.
Thanks, Juan.
Call details:
15:00 CEST
13:00 UTC
09:00 EDT
Every two weeks
By popular demand, a google
The NPT implementation of SVM does not set bits 32 and 33 of EXITINFO1.
We want to fix that, so check those fields and also add two extra tests:
- reserved bits during page access (the existing test is for reserved bits
during page table walks)
- test for writes to a read-only page mapped to
The exitinfo values were plain wrong for the page-walk tests
(including npt_rsvd), or else they were missing bits 32:33.
Expect the right values.
Signed-off-by: Paolo Bonzini pbonz...@redhat.com
---
x86/svm.c | 10 +-
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git
The reserved bit test was testing faults during page walk, rather than
during page access. Add another test that uses large pages to test
reserved bits during page access, and rename the old test to indicate
what it really covers.
Signed-off-by: Paolo Bonzini pbonz...@redhat.com
---
x86/svm.c |
Test that the emulator correctly injects a nested page fault VMEXIT.
Reported-by: Valentine Sinitsyn valentine.sinit...@gmail.com
Signed-off-by: Paolo Bonzini pbonz...@redhat.com
---
x86/svm.c | 30 ++
1 file changed, 30 insertions(+)
diff --git a/x86/svm.c
Currently, if a permission error happens during the translation of
the final GPA to HPA, walk_addr_generic returns 0 but does not fill
in walker-fault. To avoid this, add an x86_exception* argument
to the translate_gpa function, and let it fill in walker-fault.
The nested_page_fault field will be
This is required for the following patch to work correctly. If a nested page
fault happens during emulation, we must inject a vmexit, not a page fault.
Luckily we already have the required machinery: it is enough to return
X86EMUL_INTERCEPTED instead of X86EMUL_PROPAGATE_FAULT.
Reported-by:
This is similar to what the EPT code does with the exit qualification.
This allows the guest to see a valid value for bits 33:32.
Signed-off-by: Paolo Bonzini pbonz...@redhat.com
---
arch/x86/kvm/paging_tmpl.h | 6 ++
arch/x86/kvm/svm.c | 26 ++
2 files
Bit 8 would be the global bit, which does not quite make sense for non-leaf
page table entries. Intel ignores it; AMD ignores it in PDEs, but reserves it
in PDPEs and PML4Es. The SVM test is relying on this behavior, so enforce it.
Signed-off-by: Paolo Bonzini pbonz...@redhat.com
---
Patch 1 implements AMD semantics for non-leaf PDPEs and PML4Es, which
are a bit different from Intel. The SVM test relies on this, so fix it.
Patch 2 lets nested SVM implement nested page fault correctly. We were
not setting bits 32/33.
Patches 3 and 4 fix the interaction between emulator and
Here is a patchset containing an update on ivshmem specs documentation and
importing ivshmem server and client tools.
These tools have been written from scratch and are not related to what is
available in nahanni repository.
I put them in contrib/ directory as the qemu-doc.texi was already telling
Signed-off-by: David Marchand david.march...@6wind.com
---
contrib/ivshmem-server/ivshmem-server.c |3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/contrib/ivshmem-server/ivshmem-server.c
b/contrib/ivshmem-server/ivshmem-server.c
index 0afa6e8..e0d4d1d 100644
---
Switch to qemu/queue.h strutures.
Signed-off-by: David Marchand david.march...@6wind.com
---
contrib/ivshmem-client/ivshmem-client.c | 17
contrib/ivshmem-client/ivshmem-client.h |7 ---
contrib/ivshmem-server/ivshmem-server.c | 33 ---
Signed-off-by: David Marchand david.march...@6wind.com
---
contrib/ivshmem-server/ivshmem-server.c |2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/contrib/ivshmem-server/ivshmem-server.c
b/contrib/ivshmem-server/ivshmem-server.c
index 15d468c..4732dab 100644
---
Signed-off-by: David Marchand david.march...@6wind.com
---
contrib/ivshmem-client/ivshmem-client.c |9 ++---
contrib/ivshmem-server/ivshmem-server.c | 12 ++--
2 files changed, 4 insertions(+), 17 deletions(-)
diff --git a/contrib/ivshmem-client/ivshmem-client.c
Add some notes on the parts needed to use ivshmem devices: more specifically,
explain the purpose of an ivshmem server and the basic concept to use the
ivshmem devices in guests.
Move some parts of the documentation and re-organise it.
Signed-off-by: David Marchand david.march...@6wind.com
Following Gonglei comments, rework error handling using goto.
Signed-off-by: David Marchand david.march...@6wind.com
---
contrib/ivshmem-client/ivshmem-client.c | 17 -
contrib/ivshmem-server/ivshmem-server.c | 19 ++-
2 files changed, 18 insertions(+), 18
More fixes following Gonglei comments:
- add a missing \n in a debug message.
- add an explicit initialisation of sock_fd.
- fix a check on vector index.
Signed-off-by: David Marchand david.march...@6wind.com
---
contrib/ivshmem-client/ivshmem-client.c |5 +++--
1 file changed, 3
Send a protocol version as the first message from server, clients must close
communication if they don't support this protocol version.
Older QEMUs should be fine with this change in the protocol since they overrides
their own vm_id on reception of an id associated to no eventfd.
Signed-off-by:
Fix coding style for structures.
Signed-off-by: David Marchand david.march...@6wind.com
---
contrib/ivshmem-client/ivshmem-client.c | 47 ++-
contrib/ivshmem-client/ivshmem-client.h | 76 +++
contrib/ivshmem-client/main.c | 21 -
When using ivshmem devices, notifications between guests can be sent as
interrupts using a ivshmem-server (typical use described in documentation).
The client is provided as a debug tool.
Signed-off-by: Olivier Matz olivier.m...@6wind.com
Signed-off-by: David Marchand david.march...@6wind.com
---
Signed-off-by: David Marchand david.march...@6wind.com
---
Makefile|8
configure |3 +++
contrib/ivshmem-client/Makefile | 29 -
contrib/ivshmem-server/Makefile | 29 -
4
Signed-off-by: David Marchand david.march...@6wind.com
---
contrib/ivshmem-client/main.c |6 +++---
contrib/ivshmem-server/main.c |8
2 files changed, 7 insertions(+), 7 deletions(-)
diff --git a/contrib/ivshmem-client/main.c b/contrib/ivshmem-client/main.c
index
ivshmem server should use the same default values as hw/misc/ivshmem.
Update accordingly.
Signed-off-by: David Marchand david.march...@6wind.com
---
contrib/ivshmem-server/main.c |4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/contrib/ivshmem-server/main.c
Reuse parsers from QEMU, C99 boolean.
Signed-off-by: David Marchand david.march...@6wind.com
---
contrib/ivshmem-client/ivshmem-client.c | 12 +
contrib/ivshmem-client/ivshmem-client.h |4 +-
contrib/ivshmem-client/main.c | 12 +
contrib/ivshmem-server/ivshmem-server.c
Il 29/08/2014 12:31, Paolo Bonzini ha scritto:
David and Xiao, here's my take on the MMIO generation patches. Now
with documentation, too. :) Please review!
David Matlack (2):
kvm: fix potentially corrupt mmio cache
kvm: x86: fix stale mmio cache bug
Paolo Bonzini (1):
KVM: do
On Thu, Aug 28, 2014 at 08:55:18PM +0800, Zhang Haoyu wrote:
Hi Jason,
I tested below patch, it's okay, the e1000 interrupt storm disappeared.
But I am going to make a bit change on it, could you help review it?
Currently, we call ioapic_service() immediately when we find the irq is still
On Wed, Aug 27, 2014 at 06:17:39PM +0800, Tang Chen wrote:
apic access page is pinned in memory. As a result, it cannot be
migrated/hot-removed.
Actually, it is not necessary to be pinned.
The hpa of apic access page is stored in VMCS APIC_ACCESS_ADDR pointer. When
the page is migrated,
Hi Paolo,
On 02.09.2014 21:13, Paolo Bonzini wrote:
Patches 3 and 4 fix the interaction between emulator and nested EPT/NPT,
which was reported by Valentine.
I can confirm the initial bug I observed is fixed with these patches
(applied to 3.16.1).
All tests in kvm-unit-test's master also
On Sun, Jun 8, 2014 at 12:17 PM, Christoffer Dall
christoffer.d...@linaro.org wrote:
On Thu, Jun 05, 2014 at 07:03:23PM +0200, Antonios Motakis wrote:
Adds support to mask interrupts, and also for automasked interrupts.
Level sensitive interrupts are exposed as automasked interrupts and
are
On Sun, Jun 8, 2014 at 12:09 PM, Christoffer Dall
christoffer.d...@linaro.org wrote:
On Thu, Jun 05, 2014 at 07:03:22PM +0200, Antonios Motakis wrote:
This patch allows to set an eventfd for a patform device's interrupt,
and also to trigger the interrupt eventfd from userspace for testing.
fc95ca7284bc54953165cba76c3228bd2cdb9591 introduces a memset in
kvmppc_alloc_hpt since the general CMA doesn't clear the memory it
allocates.
However, the size argument passed to memset is computed from a signed value
and its signed bit is extended by the cast the compiler is doing. This lead
to
On Tue, Sep 02, 2014 at 05:05:26PM +0200, Paolo Bonzini wrote:
The exitinfo values were plain wrong for the page-walk tests
(including npt_rsvd), or else they were missing bits 32:33.
Expect the right values.
Are bits 32:33 really emulated? IIRC they were not emulated in the
inital
Ah, here you add emulation of these bits.
On Tue, Sep 02, 2014 at 05:13:48PM +0200, Paolo Bonzini wrote:
This is similar to what the EPT code does with the exit qualification.
This allows the guest to see a valid value for bits 33:32.
Signed-off-by: Paolo Bonzini pbonz...@redhat.com
---
On Fri, Aug 29, 2014 at 3:31 AM, Paolo Bonzini pbonz...@redhat.com wrote:
From: David Matlack dmatl...@google.com
vcpu exits and memslot mutations can run concurrently as long as the
vcpu does not aquire the slots mutex. Thus it is theoretically possible
for memslots to change underneath a
Il 02/09/2014 18:33, Joerg Roedel ha scritto:
Ah, here you add emulation of these bits.
On Tue, Sep 02, 2014 at 05:13:48PM +0200, Paolo Bonzini wrote:
This is similar to what the EPT code does with the exit qualification.
This allows the guest to see a valid value for bits 33:32.
On Tue, Sep 2, 2014 at 8:42 AM, Paolo Bonzini pbonz...@redhat.com wrote:
Il 29/08/2014 12:31, Paolo Bonzini ha scritto:
David and Xiao, here's my take on the MMIO generation patches. Now
with documentation, too. :) Please review!
David Matlack (2):
kvm: fix potentially corrupt mmio cache
Il 02/09/2014 18:44, David Matlack ha scritto:
-#define MMIO_GEN_SHIFT 19
-#define MMIO_GEN_LOW_SHIFT 9
-#define MMIO_GEN_LOW_MASK ((1 MMIO_GEN_LOW_SHIFT) - 1)
+#define MMIO_GEN_SHIFT 20
+#define MMIO_GEN_LOW_SHIFT
Il 02/09/2014 18:47, David Matlack ha scritto:
Ping?
Sorry for the delay. I think the patches look good. And patch 3/3 still
fixes the bug I was originally seeing, so I'm happy :). I just had one
small comment (see my reply to patch 2/3).
I answered that question now. Can I add your
Il 02/09/2014 18:02, Valentine Sinitsyn ha scritto:
I can confirm the initial bug I observed is fixed with these patches
(applied to 3.16.1).
All tests in kvm-unit-test's master also pass, except for ioio which is
(probably) affected by another (unrelated) bug fixed by Jan back in June
but
Il 02/09/2014 18:46, Paolo Bonzini ha scritto:
How about an io-port emulated on
L1 but passed through to L2 by the nested hypervisor. On emulation of
INS or OUTS, KVM would need to read/write to an L2 address space,
It would need to read/write to *L1* (that's where the VMCB's IOIO map
On Tue, Sep 02, 2014 at 06:46:06PM +0200, Paolo Bonzini wrote:
Il 02/09/2014 18:33, Joerg Roedel ha scritto:
Comment is true, but doesn't make the check below obsolete, no?
No, it doesn't. I'll rewrite it as
/*
* This cannot happen unless the guest is playing TOCTTOU games,
On Tue, Sep 2, 2014 at 9:49 AM, Paolo Bonzini pbonz...@redhat.com wrote:
Il 02/09/2014 18:44, David Matlack ha scritto:
-#define MMIO_GEN_SHIFT 19
-#define MMIO_GEN_LOW_SHIFT 9
-#define MMIO_GEN_LOW_MASK ((1 MMIO_GEN_LOW_SHIFT) - 1)
+#define
On Tue, Sep 2, 2014 at 9:50 AM, Paolo Bonzini pbonz...@redhat.com wrote:
Il 02/09/2014 18:47, David Matlack ha scritto:
Ping?
Sorry for the delay. I think the patches look good. And patch 3/3 still
fixes the bug I was originally seeing, so I'm happy :). I just had one
small comment (see my
On 09/02/2014 07:46 PM, Paolo Bonzini wrote:
*/
if (unlikely(real_gfn == UNMAPPED_GVA))
goto error;
@@ -1974,10 +1974,28 @@ static void nested_svm_inject_npf_exit(struct kvm_vcpu
*vcpu,
{
struct vcpu_svm *svm = to_svm(vcpu);
-
On Tue, Sep 2, 2014 at 10:36 AM, Amit Shah amit.s...@redhat.com wrote:
On (Mon) 01 Sep 2014 [20:52:46], Zhang Haoyu wrote:
Hi, all
I start a VM with virtio-serial (default ports number: 31), and found
that virtio-blk performance degradation happened, about 25%, this
problem can be
On (Tue) 02 Sep 2014 [22:05:45], Andrey Korolyov wrote:
Can confirm serious degradation comparing to the 1.1 with regular
serial output - I am able to hang VM forever after some tens of
seconds after continuously printing dmest to the ttyS0. VM just ate
all available CPU quota during test
On Tue, Sep 2, 2014 at 10:11 PM, Amit Shah amit.s...@redhat.com wrote:
On (Tue) 02 Sep 2014 [22:05:45], Andrey Korolyov wrote:
Can confirm serious degradation comparing to the 1.1 with regular
serial output - I am able to hang VM forever after some tens of
seconds after continuously printing
On 08/31/2014 11:05 AM, Paolo Bonzini wrote:
Il 29/08/2014 23:05, Chris J Arges ha scritto:
And indeed there is a condition where matched already_matched are
both true. In this case we don't zero or increment nr_vcpus_matched_tsc.
Incrementing nr_vcpus_matched_tsc in that last else clause
On 09/02/2014 09:25 AM, David Marchand wrote:
When using ivshmem devices, notifications between guests can be sent as
interrupts using a ivshmem-server (typical use described in documentation).
The client is provided as a debug tool.
Signed-off-by: Olivier Matz olivier.m...@6wind.com
On 09/02/2014 09:25 AM, David Marchand wrote:
Add some notes on the parts needed to use ivshmem devices: more specifically,
explain the purpose of an ivshmem server and the basic concept to use the
ivshmem devices in guests.
Move some parts of the documentation and re-organise it.
On 09/02/2014 09:25 AM, David Marchand wrote:
Reuse parsers from QEMU, C99 boolean.
Signed-off-by: David Marchand david.march...@6wind.com
---
contrib/ivshmem-client/ivshmem-client.c | 12 +
contrib/ivshmem-client/ivshmem-client.h |4 +-
contrib/ivshmem-client/main.c |
On 09/02/2014 09:25 AM, David Marchand wrote:
Here is a patchset containing an update on ivshmem specs documentation and
importing ivshmem server and client tools.
These tools have been written from scratch and are not related to what is
available in nahanni repository.
I put them in contrib/
On Mon, 2014-09-01 at 14:52 +0200, Eric Auger wrote:
This RFC proposes an integration of ARM: Forwarding physical
interrupts to a guest VM (http://lwn.net/Articles/603514/) in
KVM.
It enables to transform a VFIO platform driver IRQ into a forwarded
IRQ. The direct benefit is that, for a
Hey all,
From all the manuals, faqs, howtos, etc. It looks like I have everything
configured correctly and everything but the networking is working. Can
anyone suggest what I might have wrong?
On the network the host and anything on the actual network can ping the guest
VM. But the guest
Hi Gleb,
On 09/03/2014 12:00 AM, Gleb Natapov wrote:
..
+static void vcpu_reload_apic_access_page(struct kvm_vcpu *vcpu)
+{
+ /*
+* apic access page could be migrated. When the page is being migrated,
+* GUP will wait till the migrate entry is replaced with the new pte
Hi Gleb,
By the way, when testing nested vm, I started L1 and L2 vm with
-cpu XXX, -x2apic
But with or with out this patch 5/6, when migrating apic access page,
the nested vm didn't corrupt.
We cannot migrate L2 vm because it pinned some other pages in memory.
Without this patch, if we
https://bugzilla.kernel.org/show_bug.cgi?id=82211
--- Comment #7 from Zhou, Chao chao.z...@intel.com ---
xen verion: 4.4-unstable. xen.gz file is attached
--
You are receiving this mail because:
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Hi All,
This is KVM upstream test result against kvm.git next branch and qemu.git
master branch.
kvm.git next branch: fd2752352bbc98850d83b5448a288d8991590317 based on
kernel 3.17.0-rc1
qemu.git master branch: 8b3030114a449e66c68450acaac4b66f26d91416
We found two new bugs and
https://bugzilla.kernel.org/show_bug.cgi?id=82211
--- Comment #8 from Zhou, Chao chao.z...@intel.com ---
Created attachment 149111
-- https://bugzilla.kernel.org/attachment.cgi?id=149111action=edit
xen.gz file
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You are watching the assignee of the bug.
On 09/02/2014 11:42 PM, Paolo Bonzini wrote:
Il 29/08/2014 12:31, Paolo Bonzini ha scritto:
David and Xiao, here's my take on the MMIO generation patches. Now
with documentation, too. :) Please review!
David Matlack (2):
kvm: fix potentially corrupt mmio cache
kvm: x86: fix stale mmio
This series of patches is based on Alex Graf's kvm-ppc-queue branch.
It contains 3 small patches from the tree that we are shipping on
POWER8 machines: a fix for an error that we see very occasionally,
and two minor improvements. Please apply for 3.18.
Paul.
---
Since the guest can read the machine's PVR (Processor Version Register)
directly and see the real value, we should disallow userspace from
setting any value for the guest's PVR other than the real host value.
Therefore this makes kvm_arch_vcpu_set_sregs_hv() check the supplied
PVR value and return
This provides basic support for the KVM_REG_PPC_ARCH_COMPAT register
in PR KVM. At present the value is sanity-checked when set, but
doesn't actually affect anything yet.
Implementing this makes it possible to use a qemu command-line
argument such as -cpu host,compat=power7 on a POWER8 machine,
From: Paul Mackerras pau...@au1.ibm.com
Occasional failures have been seen with split-core mode and migration
where the message KVM: couldn't grab cpu appears. This increases
the length of time that we wait from 1ms to 10ms, which seems to
work around the issue.
Signed-off-by: Paul Mackerras
fc95ca7284bc54953165cba76c3228bd2cdb9591 introduces a memset in
kvmppc_alloc_hpt since the general CMA doesn't clear the memory it
allocates.
However, the size argument passed to memset is computed from a signed value
and its signed bit is extended by the cast the compiler is doing. This lead
to
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