From: Takuya Yoshikawa yoshikawa.tak...@oss.ntt.co.jp
Needed to replace test_and_set_bit_le() in virt/kvm/kvm_main.c which is
being used for this missing function.
Signed-off-by: Takuya Yoshikawa yoshikawa.tak...@oss.ntt.co.jp
Acked-by: Benjamin Herrenschmidt b...@kernel.crashing.org
---
From: Takuya Yoshikawa yoshikawa.tak...@oss.ntt.co.jp
Now that we have defined generic set_bit_le() we do not need to use
test_and_set_bit_le() for atomically setting a bit.
Signed-off-by: Takuya Yoshikawa yoshikawa.tak...@oss.ntt.co.jp
Cc: Avi Kivity a...@redhat.com
Cc: Marcelo Tosatti
On Mon, Aug 06, 2012 at 03:08:28PM +0300, Avi Kivity wrote:
On 08/06/2012 02:49 PM, Gleb Natapov wrote:
On Mon, Aug 06, 2012 at 02:39:52PM +0300, Avi Kivity wrote:
On 08/06/2012 02:05 PM, Gleb Natapov wrote:
On Mon, Aug 06, 2012 at 12:28:05PM +0300, Avi Kivity wrote:
On 08/06/2012 11:58
On (Fri) 03 Aug 2012 [15:57:49], Marcelo Tosatti wrote:
kvm_guest_time_update unconditionally clears hv_clock.flags field,
so the notification never reaches the guest.
Fix it by allowing PVCLOCK_GUEST_STOPPED to passthrough.
Signed-off-by: Marcelo Tosatti mtosa...@redhat.com
On Tue, Aug 07, 2012 at 11:46:35AM +0300, Avi Kivity wrote:
On 08/07/2012 04:32 AM, David Gibson wrote:
On Tue, Aug 07, 2012 at 06:57:57AM +1000, Benjamin Herrenschmidt wrote:
On Mon, 2012-08-06 at 13:13 +1000, David Gibson wrote:
So, I'm still trying to nut out the implications for
On 08/07/2012 03:14 PM, David Gibson wrote:
On Tue, Aug 07, 2012 at 11:46:35AM +0300, Avi Kivity wrote:
On 08/07/2012 04:32 AM, David Gibson wrote:
On Tue, Aug 07, 2012 at 06:57:57AM +1000, Benjamin Herrenschmidt wrote:
On Mon, 2012-08-06 at 13:13 +1000, David Gibson wrote:
So, I'm still
Juan Quintela quint...@redhat.com wrote:
Hi
Please send in any agenda items you are interested in covering.
As there are no agenda, today call got cancelled.
Happy hacking, Juan.
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On Wed, 2012-08-01 at 07:57 +0800, Fengguang Wu wrote:
What was the next lines? I bet you it was PASSED. Which means it did
not fail. This is the second bug you found that has to do with RCU being
called in 'idle'. The one that Paul posted a patch for.
Yeah, PASSED!
I have this patch
On 08/07/2012 01:57 PM, Alexander Graf wrote:
The e500 target has lived without mmu notifiers ever since it got
introduced, but fails for the user space check on them with hugetlbfs.
So in order to get that one working, implement mmu notifiers in a
reasonably dumb fashion and be happy. On
On Tue, Aug 07, 2012 at 09:29:33AM -0400, Steven Rostedt wrote:
On Wed, 2012-08-01 at 07:57 +0800, Fengguang Wu wrote:
What was the next lines? I bet you it was PASSED. Which means it did
not fail. This is the second bug you found that has to do with RCU being
called in 'idle'. The
On 08/07/2012 01:57 PM, Alexander Graf wrote:
Some archs need to ensure that their icache is flushed when mapping a new
page. Add a callback to the generic code for an arch to implement any cache
flush logic it may need.
Signed-off-by: Alexander Graf ag...@suse.de
---
virt/kvm/kvm_main.c
On 2012-08-03 14:57, Marcelo Tosatti wrote:
kvm_guest_time_update unconditionally clears hv_clock.flags field,
so the notification never reaches the guest.
Fix it by allowing PVCLOCK_GUEST_STOPPED to passthrough.
Signed-off-by: Marcelo Tosatti mtosa...@redhat.com
Reviewed-by: Eric B Munson
On 07.08.2012, at 15:32, Avi Kivity a...@redhat.com wrote:
On 08/07/2012 01:57 PM, Alexander Graf wrote:
Some archs need to ensure that their icache is flushed when mapping a new
page. Add a callback to the generic code for an arch to implement any cache
flush logic it may need.
On 07.08.2012, at 15:30, Avi Kivity a...@redhat.com wrote:
On 08/07/2012 01:57 PM, Alexander Graf wrote:
The e500 target has lived without mmu notifiers ever since it got
introduced, but fails for the user space check on them with hugetlbfs.
So in order to get that one working, implement
On 08/07/2012 04:44 PM, Alexander Graf wrote:
Is this the correct place? Who says the caller of hva_to_pfn() is going
to map it?
I don't think anyone is. However, we need the struct page, and all the
generic kvm mm code tries hard to hide it from its users. The alternative
would be
On 08/06/2012 08:20 PM, Peter Maydell wrote:
On 3 July 2012 10:01, Christoffer Dall c.d...@virtualopensystems.com wrote:
From: Christoffer Dall cd...@cs.columbia.edu
Userspace can inject IRQs and FIQs through the KVM_IRQ_LINE VM ioctl.
This ioctl is used since the sematics are in fact two
On 07.08.2012, at 15:58, Avi Kivity a...@redhat.com wrote:
On 08/07/2012 04:44 PM, Alexander Graf wrote:
Is this the correct place? Who says the caller of hva_to_pfn() is going
to map it?
I don't think anyone is. However, we need the struct page, and all the
generic kvm mm code
On 08/07/2012 05:08 PM, Alexander Graf wrote:
On 07.08.2012, at 15:58, Avi Kivity a...@redhat.com wrote:
On 08/07/2012 04:44 PM, Alexander Graf wrote:
Is this the correct place? Who says the caller of hva_to_pfn() is going
to map it?
I don't think anyone is. However, we need the
On 7 August 2012 14:59, Avi Kivity a...@redhat.com wrote:
On 08/06/2012 08:20 PM, Peter Maydell wrote:
On 3 July 2012 10:01, Christoffer Dall c.d...@virtualopensystems.com wrote:
From: Christoffer Dall cd...@cs.columbia.edu
Userspace can inject IRQs and FIQs through the KVM_IRQ_LINE VM ioctl.
On 07.08.2012, at 16:10, Avi Kivity a...@redhat.com wrote:
On 08/07/2012 05:08 PM, Alexander Graf wrote:
On 07.08.2012, at 15:58, Avi Kivity a...@redhat.com wrote:
On 08/07/2012 04:44 PM, Alexander Graf wrote:
Is this the correct place? Who says the caller of hva_to_pfn() is
On 08/07/2012 04:52 PM, Alexander Graf wrote:
+/* MMU Notifiers */
+
+int kvm_unmap_hva(struct kvm *kvm, unsigned long hva)
+{
+/* Is this a guest page? */
+if (!hva_to_memslot(kvm, hva))
+return 0;
+
+/*
+ * Flush all shadow tlb entries
On 08/07/2012 05:14 PM, Alexander Graf wrote:
On 07.08.2012, at 16:10, Avi Kivity a...@redhat.com wrote:
On 08/07/2012 05:08 PM, Alexander Graf wrote:
On 07.08.2012, at 15:58, Avi Kivity a...@redhat.com wrote:
On 08/07/2012 04:44 PM, Alexander Graf wrote:
Is this the correct
On 07.08.2012, at 16:14, Avi Kivity a...@redhat.com wrote:
On 08/07/2012 04:52 PM, Alexander Graf wrote:
+/* MMU Notifiers */
+
+int kvm_unmap_hva(struct kvm *kvm, unsigned long hva)
+{
+/* Is this a guest page? */
+if (!hva_to_memslot(kvm, hva))
+
On 07.08.2012, at 16:20, Avi Kivity a...@redhat.com wrote:
On 08/07/2012 05:14 PM, Alexander Graf wrote:
On 07.08.2012, at 16:10, Avi Kivity a...@redhat.com wrote:
On 08/07/2012 05:08 PM, Alexander Graf wrote:
On 07.08.2012, at 15:58, Avi Kivity a...@redhat.com wrote:
On
On 08/07/2012 05:12 PM, Peter Maydell wrote:
On 7 August 2012 14:59, Avi Kivity a...@redhat.com wrote:
On 08/06/2012 08:20 PM, Peter Maydell wrote:
On 3 July 2012 10:01, Christoffer Dall c.d...@virtualopensystems.com
wrote:
From: Christoffer Dall cd...@cs.columbia.edu
Userspace can inject
On 08/07/2012 05:24 PM, Alexander Graf wrote:
Pre-map? How?
In arch code before you install the page in a pte/tlbe.
So how do I get to the struct page in there?
pfn_to_page()
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error compiling committee.c: too many arguments to function
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On 7 August 2012 15:28, Avi Kivity a...@redhat.com wrote:
On 08/07/2012 05:12 PM, Peter Maydell wrote:
On 7 August 2012 14:59, Avi Kivity a...@redhat.com wrote:
What do you mean by per-vcpu version of KVM_IRQ_LINE?
The ARM VGIC implementation implements I need to raise per-CPU
interrupt X by
Hi,
I've been working on a new virtio transport for s390 replacing the
existing s390-virtio transport. Patches to Linux, qemu and the virtio
spec will follow.
Why?
s390-virtio is quite limited in the number of supported devices (all
related structures need to fit into a single specially mapped
Hi,
the following patches implement support for a virtual channel
subsystem in the host (virtio-ccw on the host is handled by
user space).
Patches 1 and 2 add support for injecting I/O interrupts and
(some) machine checks via the already existing mechanisms.
The most important parts are those
Add support for handling I/O interrupts (standard, subchannel-related
ones and rudimentary adapter interrupts).
The subchannel-identifying parameters are encoded into the interrupt
type.
I/O interrupts are floating, so they can't be injected on a specific
vcpu.
Signed-off-by: Cornelia Huck
Add support for injecting machine checks (only repressible
conditions for now).
This is a bit more involved than I/O interrupts, for these reasons:
- Machine checks come in both floating and cpu varieties.
- We don't have a bit for machine checks enabling, but have to use
a roundabout approach
kvm will need to use some css-related structures (pmcw, schib, orb),
so let's move the definitions from drivers/s390/cio/ to include/asm/.
Signed-off-by: Cornelia Huck cornelia.h...@de.ibm.com
---
arch/s390/include/asm/orb.h | 69 +++
This will be needed by the new virtio-ccw transport.
Signed-off-by: Cornelia Huck cornelia.h...@de.ibm.com
---
arch/s390/include/asm/ccwdev.h | 5 +
drivers/s390/cio/device_ops.c | 10 ++
2 files changed, 15 insertions(+)
diff --git a/arch/s390/include/asm/ccwdev.h
Running under a kvm host does not necessarily imply the presence of
a page mapped above the main memory with the virtio information;
however, the code includes a hard coded access to that page.
Instead, check for the presence of the page and exit gracefully
before we hit an addressing exception
Signed-off-by: Cornelia Huck cornelia.h...@de.ibm.com
---
Documentation/virtual/kvm/api.txt | 2 +-
arch/s390/kvm/kvm-s390.c | 26 ++
2 files changed, 27 insertions(+), 1 deletion(-)
diff --git a/Documentation/virtual/kvm/api.txt
There's no need to keep __MAX_SUBCHANNEL and __MAX_SSID private to the
common I/O layer when __MAX_CSSID is usable by everybody.
Signed-off-by: Cornelia Huck cornelia.h...@de.ibm.com
---
arch/s390/include/asm/cio.h | 2 ++
drivers/s390/cio/css.h | 3 ---
2 files changed, 2 insertions(+), 3
Provide a mechanism for qemu to provide fully virtual subchannels to
the guest. In the KVM case, this relies on the kernel's css support.
The !KVM case is not yet supported.
Signed-off-by: Cornelia Huck cornelia.h...@de.ibm.com
---
hw/s390x/Makefile.objs | 1 +
hw/s390x/css.c |
Add a new virtio transport that uses channel commands to perform
virtio operations.
Add a new machine type s390-ccw that uses this virtio-ccw transport
and make it the default machine for s390.
Signed-off-by: Cornelia Huck cornelia.h...@de.ibm.com
---
hw/qdev-monitor.c | 5 +
Hi,
following are the qemu parts for supporting virtual channel I/O
and the new virtio-ccw transport.
Patch 1 pulls in the new interface definitions.
Patch 2 contains the ground work for supporting virtual subchannels
(kvm only).
Patch 3 implements the new virtio-ccw transport.
Patch 4 makes
This code is transport agnostic and can be used by both the legacy
virtio code and virtio_ccw.
Signed-off-by: Cornelia Huck cornelia.h...@de.ibm.com
---
drivers/s390/kvm/Makefile | 2 +-
drivers/s390/kvm/early_printk.c | 42 +
Add a driver for kvm guests that matches virtual ccw devices provided
by the host as virtio bridge devices.
These virtio-ccw devices use a special set of channel commands in order
to perform virtio functions.
Signed-off-by: Cornelia Huck cornelia.h...@de.ibm.com
---
arch/s390/include/asm/irq.h
This patch enables using both virtio-xxx-s390 and virtio-xxx-ccw
by making the alias lookup code verify that a driver is actually
registered.
(Only included in order to allow testing of virtio-ccw; should be
replaced by cleaning up the virtio bus model.)
Not-signed-off-by: Cornelia Huck
Add specifications for the new s390 specific virtio-ccw transport.
Signed-off-by: Cornelia Huck cornelia.h...@de.ibm.com
---
virtio-spec.lyx | 433 +++
1 files changed, 433 insertions(+), 0 deletions(-)
diff --git a/virtio-spec.lyx
Hi,
here's an update to the virtio spec describing the basics of
the virtio-ccw mechanism.
Cornelia Huck (1):
virtio-spec: Add virtio-ccw spec.
virtio-spec.lyx | 433 +++
1 files changed, 433 insertions(+), 0 deletions(-)
--
1.7.5.4
--
Signed-off-by: Cornelia Huck cornelia.h...@de.ibm.com
---
linux-headers/asm-s390/kvm.h | 2 +-
linux-headers/asm-s390/kvm_para.h | 2 +-
linux-headers/linux/kvm.h | 63 +++
3 files changed, 65 insertions(+), 2 deletions(-)
diff --git
Explicitely catch all channel I/O related instructions intercepts
in the kernel and set condition code 3 for them.
This paws the way for properly handling these instructions later
on.
Note: This is not architecture compliant (the previous code wasn't
either) since setting cc 3 is not the correct
Hi,
the following patches are for Linux running as a guest under a
host with virtio-ccw support.
Patch 1 makes the kvm_virtio driver exit gracefully if the page
containing s390-virtio information it expects is not present; it
could probably go in seperately from the other patches.
Patch 2
On 2 August 2012 10:14, Jan Kiszka jan.kis...@web.de wrote:
On 2012-07-26 16:35, Peter Maydell wrote:
This patch series removes all uses of kvm_irqchip_in_kernel()
from architecture-independent code, by creating a set of more
specific functions instead to test for the particular aspects
of
-Original Message-
From: Alexander Graf [mailto:ag...@suse.de]
Sent: Tuesday, August 07, 2012 3:38 PM
To: Bhushan Bharat-R65777
Cc: kvm-...@vger.kernel.org; kvm@vger.kernel.org; Bhushan Bharat-R65777
Subject: Re: [PATCH 1/2] KVM: PPC: booke: Add watchdog emulation
On
-Original Message-
From: kvm-ppc-ow...@vger.kernel.org [mailto:kvm-ppc-ow...@vger.kernel.org] On
Behalf Of Alexander Graf
Sent: Tuesday, August 07, 2012 4:18 PM
To: Bhushan Bharat-R65777
Cc: kvm-...@vger.kernel.org; kvm@vger.kernel.org; Bhushan Bharat-R65777
Subject: Re: [PATCH
Hi Linus,
The following changes since commit 42a579a0f960081cd16fc945036e4780c3ad3202:
Merge branches 'timers-urgent-for-linus' and 'perf-urgent-for-linus' of
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip (2012-08-05 22:28:49
+0300)
are available in the git repository at:
On 08/07/2012 05:47 AM, Alexander Graf wrote:
diff --git a/arch/powerpc/kvm/booke_interrupts.S
b/arch/powerpc/kvm/booke_interrupts.S
index 3539805..890673c 100644
--- a/arch/powerpc/kvm/booke_interrupts.S
+++ b/arch/powerpc/kvm/booke_interrupts.S
@@ -73,6 +73,51 @@
On Tue, Aug 7, 2012 at 2:52 PM, Cornelia Huck cornelia.h...@de.ibm.com wrote:
Add a new virtio transport that uses channel commands to perform
virtio operations.
Add a new machine type s390-ccw that uses this virtio-ccw transport
and make it the default machine for s390.
Signed-off-by:
On Tue, Aug 7, 2012 at 2:52 PM, Cornelia Huck cornelia.h...@de.ibm.com wrote:
Provide a mechanism for qemu to provide fully virtual subchannels to
the guest. In the KVM case, this relies on the kernel's css support.
The !KVM case is not yet supported.
Signed-off-by: Cornelia Huck
On 08/07/2012 05:57 AM, Alexander Graf wrote:
When we map a page that wasn't icache cleared before, do so when first
mapping it in KVM using the same information bits as the Linux mapping
logic. That way we are 100% sure that any page we map does not have stale
entries in the icache.
What
On Tue, 2012-08-07 at 16:13 +0300, Avi Kivity wrote:
Peter has started to fix up this naming mess in qemu. I guess we should
do the same for the kernel (except for ABIs) and document it, because it
keeps generating confusion.
Ok so our current situation is that the XICS and MPIC are
On Thu, Jul 19, 2012 at 03:14:38PM +0300, Avi Kivity wrote:
Instead of populating the the entire register file, read in registers
as they are accessed, and write back only the modified ones. This
saves a VMREAD and VMWRITE on Intel (for rsp, since it is not usually
used during emulation), and
On Tue, Aug 07, 2012 at 06:23:01PM -0300, Marcelo Tosatti wrote:
On Thu, Jul 19, 2012 at 03:14:38PM +0300, Avi Kivity wrote:
Instead of populating the the entire register file, read in registers
as they are accessed, and write back only the modified ones. This
saves a VMREAD and VMWRITE on
On Tue, Aug 07, 2012 at 04:13:49PM +0300, Avi Kivity wrote:
On 08/07/2012 03:14 PM, David Gibson wrote:
On Tue, Aug 07, 2012 at 11:46:35AM +0300, Avi Kivity wrote:
On 08/07/2012 04:32 AM, David Gibson wrote:
On Tue, Aug 07, 2012 at 06:57:57AM +1000, Benjamin Herrenschmidt wrote:
On Mon,
-Original Message-
From: Wood Scott-B07421
Sent: Wednesday, August 08, 2012 2:15 AM
To: Alexander Graf
Cc: Bhushan Bharat-R65777; kvm-...@vger.kernel.org; kvm@vger.kernel.org;
Bhushan
Bharat-R65777
Subject: Re: [PATCH 3/3] KVM: PPC: booke: Added debug handler
On 08/07/2012
We can know the guest is panicked when the guest runs on xen.
But we do not have such feature on kvm.
Another purpose of this feature is: management app(for example:
libvirt) can do auto dump when the guest is panicked. If management
app does not do auto dump, the guest's user can do dump by hand
The guest should run after reseting it, but it does not run if its
old state is RUN_STATE_INTERNAL_ERROR or RUN_STATE_PAUSED.
We don't set runstate to RUN_STATE_PAUSED when reseting the guest,
so the runstate will be changed from RUN_STATE_INTERNAL_ERROR or
RUN_STATE_PAUSED to
Corresponding kvm.git hash: 439793d4 with my patch for kvm
---
linux-headers/asm-s390/kvm.h |2 +-
linux-headers/asm-s390/kvm_para.h |2 +-
linux-headers/asm-x86/kvm.h |1 +
linux-headers/asm-x86/kvm_para.h |9 +
linux-headers/linux/kvm.h |3 +++
The guest will be in this state when it is panicked.
Signed-off-by: Wen Congyang we...@cn.fujitsu.com
---
qapi-schema.json |6 +-
qmp.c|3 ++-
vl.c |7 ++-
3 files changed, 13 insertions(+), 3 deletions(-)
diff --git a/qapi-schema.json
This event will be emited when the guest is panicked.
Signed-off-by: Wen Congyang we...@cn.fujitsu.com
---
monitor.c |1 +
monitor.h |1 +
2 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/monitor.c b/monitor.c
index 49dccfe..c892b7e 100644
--- a/monitor.c
+++ b/monitor.c
@@
If the target is x86/x86_64, the guest's kernel will write 0x01 to the
port KVM_PV_EVENT_PORT when it is panciked. This patch introduces a new
qom device kvm_pv_ioport to listen this I/O port, and deal with panicked
event according to panicked_action's value. The possible actions are:
1. emit
Signed-off-by: Wen Congyang we...@cn.fujitsu.com
---
hw/pc_piix.c|6 +-
qemu-config.c |4
qemu-options.hx |3 ++-
3 files changed, 11 insertions(+), 2 deletions(-)
diff --git a/hw/pc_piix.c b/hw/pc_piix.c
index 4af8403..9b877a7 100644
--- a/hw/pc_piix.c
+++
On Tue, Aug 7, 2012 at 6:57 AM, Alexander Graf ag...@suse.de wrote:
Architecture code might want to figure out if an hva that it gets for example
via the mmu notifier callbacks actually is in guest mapped memory, and if so,
in which memory slot.
This patch introduces a helper function to
Any news? Was this applied upstream?
Am 06.08.2012 14:37, schrieb Avi Kivity:
On 08/06/2012 03:12 PM, Avi Kivity wrote:
On 08/06/2012 11:46 AM, Stefan Priebe - Profihost AG wrote:
But still i got the segfault and core dump - this is my main problem? I
mean qemu-kvm master isn't declared as
HI,
I've just been looking through the patches Greg KH has stored for
3.5-stable and this doesn't seem to be amongst them.
I can't see any way in which it contravenes the stable rules and, given
there's a distinct possibility of a mix of i386, kvm-1.1.x and a 3.5
kernel resulting in a
This is the hypercall documentation patch series
First patch covers KVM specific hypercall information.
second patch is has typo fix for vmcall instruction
comment in kvm_para.h
Third patch includes a veryful documentation on PowerPC
hypercalls originally written by Alex
Changes since initial
From: Raghavendra K T raghavendra...@linux.vnet.ibm.com
Thanks Alex for KVM_HC_FEATURES inputs and Jan for VAPIC_POLL_IRQ,
and Peter (HPA) for suggesting hypercall ABI addition.
Signed-off-by: Raghavendra K T raghavendra...@linux.vnet.ibm.com
---
TODO: We need to add history details of each
From: Alexander Graf ag...@suse.de
Signed-off-by: Alexander Graf ag...@suse.de
Signed-off-by: Raghavendra K T raghavendra...@linux.vnet.ibm.com
---
Documentation/virtual/kvm/ppc-pv.txt | 22 ++
1 files changed, 22 insertions(+), 0 deletions(-)
diff --git
From: Raghavendra K T raghavendra...@linux.vnet.ibm.com
Signed-off-by: Raghavendra K T raghavendra...@linux.vnet.ibm.com
---
arch/x86/include/asm/kvm_para.h |2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/arch/x86/include/asm/kvm_para.h
On 08/07/2012 01:10 PM, Raghavendra K T wrote:
From: Alexander Grafag...@suse.de
Signed-off-by: Alexander Grafag...@suse.de
Signed-off-by: Raghavendra K Traghavendra...@linux.vnet.ibm.com
---
Sorry it meant to be 3/3.
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On 08/07/2012 01:09 PM, Raghavendra K T wrote:
This is the hypercall documentation patch series
First patch covers KVM specific hypercall information.
second patch has typo fix for vmcall instruction
comment in kvm_para.h
Third patch includes a very useful documentation on PowerPC
hypercalls
On 08/06/2012 11:25 PM, Scott Wood wrote:
On 08/05/2012 04:00 AM, Avi Kivity wrote:
On 08/04/2012 01:32 AM, Benjamin Herrenschmidt wrote:
On Fri, 2012-08-03 at 15:05 -0300, Marcelo Tosatti wrote:
See kvm_arch_process_async_events() call to qemu_system_reset_request()
in target-i386/kvm.c.
This patch introduces bio-based IO path for virtio-blk.
Compared to request-based IO path, bio-based IO path uses driver
provided -make_request_fn() method to bypasses the IO scheduler. It
handles the bio to device directly without allocating a request in block
layer. This reduces the IO path in
We need to support both REQ_FLUSH and REQ_FUA for bio based path since
it does not get the sequencing of REQ_FUA into REQ_FLUSH that request
based drivers can request.
REQ_FLUSH is emulated by:
A) If the bio has no data to write:
1. Send VIRTIO_BLK_T_FLUSH to device,
2. In the flush I/O
Hi, all
This version reworked on REQ_FLUSH and REQ_FUA support as suggested by
Christoph and dropped the block core bits since Jens has picked them up.
Fio test shows bio-based IO path gives the following performance improvement:
1) Ramdisk device
With bio-based IO path, sequential
On 08/07/2012 04:32 AM, David Gibson wrote:
On Tue, Aug 07, 2012 at 06:57:57AM +1000, Benjamin Herrenschmidt wrote:
On Mon, 2012-08-06 at 13:13 +1000, David Gibson wrote:
So, I'm still trying to nut out the implications for H_CEDE, and think
if there are any other hypercalls that might want
On 08/06/2012 11:17 PM, Christoph Hellwig wrote:
On Thu, Aug 02, 2012 at 02:43:04PM +0800, Asias He wrote:
Even if it has a payload waiting is highly suboptimal and it should
use a non-blocking sequencing like it is done in the request layer.
So, for REQ_FLUSH, what we need is that send out
At least after review is done I really think this patch sopuld be folded
into the previous one.
Some more comments below:
@@ -58,6 +58,12 @@ struct virtblk_req
struct bio *bio;
struct virtio_blk_outhdr out_hdr;
struct virtio_scsi_inhdr in_hdr;
+ struct work_struct
On Tue, Aug 07, 2012 at 04:47:13PM +0800, Asias He wrote:
1) Ramdisk device
With bio-based IO path, sequential read/write, random read/write
IOPS boost : 28%, 24%, 21%, 16%
Latency improvement: 32%, 17%, 21%, 16%
2) Fusion IO device
With bio-based IO path,
Changelog:
- introduce KVM_PFN_ERR_RO_FAULT instead of dummy page
- introduce KVM_HVA_ERR_BAD and optimize error hva indicators
The test case can be found at:
http://lkml.indiana.edu/hypermail/linux/kernel/1207.2/00819/migrate-perf.tar.bz2
In current code, if we map a readonly memory space from
Check flags when memslot is registered from userspace as Avi's suggestion
Signed-off-by: Xiao Guangrong xiaoguangr...@linux.vnet.ibm.com
---
virt/kvm/kvm_main.c | 12
1 files changed, 12 insertions(+), 0 deletions(-)
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index
Quote Avi's comment:
| KVM_MEMSLOT_INVALID is actually an internal symbol, not used by
| userspace. Please move it to kvm_host.h.
Also, move KVM_MEMSLOT_INVALID to the highest bit
Signed-off-by: Xiao Guangrong xiaoguangr...@linux.vnet.ibm.com
---
include/linux/kvm.h |1 -
It can instead of hva_to_pfn_atomic
Signed-off-by: Xiao Guangrong xiaoguangr...@linux.vnet.ibm.com
---
arch/x86/kvm/mmu.c |5 +
include/linux/kvm_host.h |3 ++-
virt/kvm/kvm_main.c | 14 --
3 files changed, 11 insertions(+), 11 deletions(-)
diff --git
This set of functions is only used to read data from host space, in the
later patch, we will only get a readonly hva in gfn_to_hva_read, and
the function name is a good hint to let gfn_to_hva_read to pair with
kvm_read_hva()/kvm_read_hva_atomic()
Signed-off-by: Xiao Guangrong
We do too many things in hva_to_pfn, this patch reorganize the code,
let it be better readable
Signed-off-by: Xiao Guangrong xiaoguangr...@linux.vnet.ibm.com
---
virt/kvm/kvm_main.c | 159 +++
1 files changed, 97 insertions(+), 62 deletions(-)
In current code, we always map writable pfn for the read-fault, in order
to support readonly memslot, we map writable pfn only if 'writable'
is not NULL
Signed-off-by: Xiao Guangrong xiaoguangr...@linux.vnet.ibm.com
---
virt/kvm/kvm_main.c | 24 +++-
1 files changed, 23
In the later patch, it indicates failure when we try to get a writable
pfn from the readonly memslot
Signed-off-by: Xiao Guangrong xiaoguangr...@linux.vnet.ibm.com
---
include/linux/kvm_host.h |1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/include/linux/kvm_host.h
Then, remove bad_hva and inline kvm_is_error_hva
Signed-off-by: Xiao Guangrong xiaoguangr...@linux.vnet.ibm.com
---
include/linux/kvm_host.h |8 +++-
virt/kvm/kvm_main.c | 13 +
2 files changed, 8 insertions(+), 13 deletions(-)
diff --git a/include/linux/kvm_host.h
In the later patch, it indicates failure when we try to get a writable
hva from the readonly slot
Signed-off-by: Xiao Guangrong xiaoguangr...@linux.vnet.ibm.com
---
include/linux/kvm_host.h |5 +++--
1 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/include/linux/kvm_host.h
In current code, if we map a readonly memory space from host to guest
and the page is not currently mapped in the host, we will get a fault-pfn
and async is not allowed, then the vm will crash
We introduce readonly memory region to map ROM/ROMD to the guest, read access
is happy for readonly
Introduce set_mmio_exit_info to cleanup the common code
Signed-off-by: Xiao Guangrong xiaoguangr...@linux.vnet.ibm.com
---
arch/x86/kvm/x86.c | 33 +
1 files changed, 17 insertions(+), 16 deletions(-)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index
Introduce write_readonly_mem in mmio-exit-info to indicate this exit is
caused by write access on readonly memslot
Signed-off-by: Xiao Guangrong xiaoguangr...@linux.vnet.ibm.com
---
arch/x86/kvm/x86.c | 12
include/linux/kvm.h |3 +++
include/linux/kvm_host.h |1
On 03.08.2012, at 07:30, Bharat Bhushan wrote:
This patch adds the watchdog emulation in KVM. The watchdog
emulation is enabled by KVM_ENABLE_CAP(KVM_CAP_PPC_BOOKE_WATCHDOG) ioctl.
The kernel timer are used for watchdog emulation and emulates
h/w watchdog state machine. On watchdog timer
On 03.08.2012, at 07:30, Bharat Bhushan wrote:
I am sending this as a separate patch for easiness on review.
Once reviewed I will merge this with watchdog patch.
Please don't merge, but rather make 2 different patches out of it:
1) Introduce kvmppc_handle_requests()
2) Implement
On 03.08.2012, at 09:08, Bharat Bhushan wrote:
From: Bharat Bhushan bharat.bhus...@freescale.com
IAC/DAC are defined as 32 bit while they are 64 bit wide. So ONE_REG
interface is added to set/get them.
Signed-off-by: Bharat Bhushan bharat.bhus...@freescale.com
---
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