On Thu, Oct 03, 2013 at 08:21:20AM +1000, Benjamin Herrenschmidt wrote:
On Wed, 2013-10-02 at 17:37 +0300, Gleb Natapov wrote:
On Wed, Oct 02, 2013 at 04:33:18PM +0200, Paolo Bonzini wrote:
Il 02/10/2013 16:08, Alexander Graf ha scritto:
The hwrng is accessible by host userspace via
On Oct 1, 2013, at 5:23 AM, Marcelo Tosatti mtosa...@redhat.com wrote:
Unrelated to this patch:
If vcpu-mode = OUTSIDE_GUEST_MODE, no IPI is sent
by kvm_flush_remote_tlbs.
Yes.
So how is this supposed to work again?
/*
* Wait for all vcpus to exit guest mode
On Oct 1, 2013, at 6:39 AM, Marcelo Tosatti mtosa...@redhat.com wrote:
On Thu, Sep 05, 2013 at 06:29:06PM +0800, Xiao Guangrong wrote:
Currently, kvm zaps the large spte if write-protected is needed, the later
read can fault on that spte. Actually, we can make the large spte readonly
instead
On Thu, Oct 03, 2013 at 08:07:22AM +1000, Benjamin Herrenschmidt wrote:
On Wed, 2013-10-02 at 13:02 +0300, Gleb Natapov wrote:
Yes, I alluded to it in my email to Paul and Paolo asked also. How this
interface is disabled? Also hwrnd is MMIO in a host why guest needs to
use hypercall
On Oct 1, 2013, at 7:05 AM, Marcelo Tosatti mtosa...@redhat.com wrote:
On Thu, Sep 05, 2013 at 06:29:08PM +0800, Xiao Guangrong wrote:
Now we can flush all the TLBs out of the mmu lock without TLB corruption when
write-proect the sptes, it is because:
- we have marked large sptes readonly
On Thu, 2013-10-03 at 08:43 +0300, Gleb Natapov wrote:
Why it can be a bad idea? User can drain hwrng continuously making other
users of it much slower, or even worse, making them fall back to another
much less reliable, source of entropy.
Not in a very significant way, we generate entropy at
From: Aneesh Kumar K.V aneesh.ku...@linux.vnet.ibm.com
This was introduced by 85a0d845d8 (KVM: PPC: Book3S PR: Allocate
kvm_vcpu structs from kvm_vcpu_cache).
arch/powerpc/kvm/book3s_pr.c: In function 'kvmppc_core_vcpu_create':
arch/powerpc/kvm/book3s_pr.c:1182:30: error: 'struct
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
Il 30/09/2013 11:08, Jan Kiszka ha scritto:
On 2013-09-26 17:04, Paolo Bonzini wrote:
Hi all,
the test fails for me if the preemption timer value is set to a
value that is above ~2000 (which means ~65000 TSC cycles on this
machine). The
On Wed, Oct 02, 2013 at 12:23:26PM +0200, Andre Richter wrote:
When KVM (de)assigns PCI(e) devices to VMs, a debug message is printed
including the BDF notation of the respective device. Currently, the BDF
notation does not have the commonly used leading zeros. This produces
messages like
On Wed, Oct 02, 2013 at 04:06:13PM +0200, Paolo Bonzini wrote:
As soon as the kernel will support the XSAVE extensions in Skylake
processors, we will want both userspace and the hypervisor to run
guests without showing any trace of the new features (because
support for them in the hypervisor
On Wed, 2 Oct 2013 17:54:57 +0200
Paolo Bonzini pbonz...@redhat.com wrote:
The data in leaf 0Dh depends on information from other feature bits.
Instead of passing it blindly from the host, compute it based on
whether these feature bits are enabled.
Signed-off-by: Paolo Bonzini
On Thu, Oct 03, 2013 at 11:59:24AM +0200, Igor Mammedov wrote:
On Wed, 2 Oct 2013 17:54:57 +0200
Paolo Bonzini pbonz...@redhat.com wrote:
The data in leaf 0Dh depends on information from other feature bits.
Instead of passing it blindly from the host, compute it based on
whether these
On Thu, Oct 03, 2013 at 08:48:03AM +0300, Gleb Natapov wrote:
On Thu, Oct 03, 2013 at 08:45:42AM +1000, Paul Mackerras wrote:
On Wed, Oct 02, 2013 at 04:36:05PM +0200, Alexander Graf wrote:
On 02.10.2013, at 16:33, Paolo Bonzini wrote:
Il 02/10/2013 16:08, Alexander Graf ha
On Thu, 3 Oct 2013 13:01:54 +0300
Gleb Natapov g...@redhat.com wrote:
On Thu, Oct 03, 2013 at 11:59:24AM +0200, Igor Mammedov wrote:
On Wed, 2 Oct 2013 17:54:57 +0200
Paolo Bonzini pbonz...@redhat.com wrote:
The data in leaf 0Dh depends on information from other feature bits.
On Wed, Oct 02, 2013 at 04:56:11PM +0200, Paolo Bonzini wrote:
The new_cr3 MMU callback has been a wrapper for mmu_free_roots since commit
e676505 (KVM: MMU: Force cr3 reload with two dimensional paging on mov
cr3 emulation, 2012-07-08).
The commit message mentioned that mmu_free_roots() is
MMIO emulation reads the last instruction executed by the guest
and then emulates. If the guest is running in Little Endian mode,
the instruction needs to be byte-swapped before being emulated.
This patch stores the last instruction in the endian order of the
host, primarily doing a byte-swap if
On Wed, Oct 02, 2013 at 04:56:14PM +0200, Paolo Bonzini wrote:
The initialization function in mmu.c can always use walk_mmu, which
is known to be vcpu-arch.mmu. Only init_kvm_nested_mmu is used to
initialize vcpu-arch.nested_mmu.
Signed-off-by: Paolo Bonzini pbonz...@redhat.com
---
Il 03/10/2013 13:25, Gleb Natapov ha scritto:
On Wed, Oct 02, 2013 at 04:56:14PM +0200, Paolo Bonzini wrote:
The initialization function in mmu.c can always use walk_mmu, which
is known to be vcpu-arch.mmu. Only init_kvm_nested_mmu is used to
initialize vcpu-arch.nested_mmu.
Signed-off-by:
Il 03/10/2013 12:23, Gleb Natapov ha scritto:
The commit message mentioned that mmu_free_roots() is somewhat of an
overkill,
but fixing that is more complicated and will be done after this minimal
fix.
One year has passed, and no one really felt the need to do a different fix.
Wrap
On Thu, Oct 03, 2013 at 08:06:30PM +1000, Paul Mackerras wrote:
On Thu, Oct 03, 2013 at 08:48:03AM +0300, Gleb Natapov wrote:
On Thu, Oct 03, 2013 at 08:45:42AM +1000, Paul Mackerras wrote:
On Wed, Oct 02, 2013 at 04:36:05PM +0200, Alexander Graf wrote:
On 02.10.2013, at 16:33,
On Thu, Oct 03, 2013 at 01:51:09PM +0200, Paolo Bonzini wrote:
Il 03/10/2013 13:25, Gleb Natapov ha scritto:
On Wed, Oct 02, 2013 at 04:56:14PM +0200, Paolo Bonzini wrote:
The initialization function in mmu.c can always use walk_mmu, which
is known to be vcpu-arch.mmu. Only
Linus,
Please pull one more KVM fix bellow
The following changes since commit 517bf8fc211d37d3aa005fb35f9ee7f1d35cb860:
Merge branch 'for-linus' of
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs (2013-10-01 10:28:11
-0700)
are available in the git repository at:
On Wed, Oct 02, 2013 at 04:56:09PM +0200, Paolo Bonzini wrote:
A few small things (uninteresting callbacks or arguments, duplicate or
dead code) that I noticed while reviewing Gleb's latest nVMX series.
I applied 1-4 meanwhile.
Paolo Bonzini (7):
KVM: mmu: remove uninteresting MMU free
The following changes since commit a684f3cf9b9b9c3cb82be87aafc463de8974610c:
Merge remote-tracking branch 'kraxel/seabios-1.7.3.2' into staging
(2013-09-30 17:15:27 -0500)
are available in the git repository at:
git://github.com/awilliam/qemu-vfio.git tags/vfio-pci-for-qemu-20131003.0
During vfio-pci initfn, the device is not always in a state where the
option ROM can be read. In the case of graphics cards, there's often
no per function reset, which means we have host driver state affecting
whether the option ROM is usable. Ideally we want to move reading the
option ROM past
Not all resets are created equal. PM reset is not very reliable,
especially for GPUs, so we might want to opt for a bus reset if a
standard reset will only do a D3hot-D0 transition. We can also
use this to tell if the standard reset will do a bus reset (if
neither has_pm_reset or has_flr is
When MSI is accelerated through KVM the vectors are only programmed
when the guest first enables MSI support. Subsequent writes to the
vector address or data fields are ignored. Unfortunately that means
we're ignore updates done to adjust SMP affinity of the vectors.
MSI SMP affinity already
Now that VFIO has a PCI hot reset interface, take advantage of it.
There are two modes that we need to consider. The first is when only
one device within the set of devices affected is actually assigned to
the guest. In this case the other devices are are just held by VFIO
for isolation and we
From: Alexey Kardashevskiy a...@ozlabs.ru
Memory regions can easily be 2^64 byte long and therefore overflow
for just a bit but that is enough for int128_get64() to assert.
This takes care of debug printing of huge section sizes.
Signed-off-by: Alexey Kardashevskiy a...@ozlabs.ru
Signed-off-by:
Remove carriage returns and tweak formatting for error_reports.
Signed-off-by: Alex Williamson alex.william...@redhat.com
---
hw/misc/vfio.c | 24
1 file changed, 12 insertions(+), 12 deletions(-)
diff --git a/hw/misc/vfio.c b/hw/misc/vfio.c
index 730dec5..a73e7f5
On Wed, 2013-10-02 at 16:40 -0700, gre...@linuxfoundation.org wrote:
On Wed, Oct 02, 2013 at 04:35:15PM -0500, Scott Wood wrote:
On Wed, 2013-10-02 at 14:16 -0700, gre...@linuxfoundation.org wrote:
On Wed, Oct 02, 2013 at 04:08:41PM -0500, Scott Wood wrote:
I don't see any equivalent
Il 03/10/2013 17:39, Alex Williamson ha scritto:
+static const MemoryRegionOps vfio_rom_ops = {
+.read = vfio_rom_read,
+.endianness = DEVICE_LITTLE_ENDIAN,
+};
+
I think you need to define a write callback too (unless you're sure for
some other reason that the area will never be
On Thu, Oct 03, 2013 at 01:33:27PM -0500, Scott Wood wrote:
What it looks like we do still want from the driver core is the ability
for a driver to say that it should not be bound to a device except via
explicit sysfs bind,
You can do that today by not providing any device ids in your driver
On Thu, 2013-10-03 at 11:54 -0700, gre...@linuxfoundation.org wrote:
On Thu, Oct 03, 2013 at 01:33:27PM -0500, Scott Wood wrote:
What it looks like we do still want from the driver core is the ability
for a driver to say that it should not be bound to a device except via
explicit sysfs
On Thu, 2013-10-03 at 20:46 +0200, Paolo Bonzini wrote:
Il 03/10/2013 17:39, Alex Williamson ha scritto:
+static const MemoryRegionOps vfio_rom_ops = {
+.read = vfio_rom_read,
+.endianness = DEVICE_LITTLE_ENDIAN,
+};
+
I think you need to define a write callback too (unless
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On Thu, Oct 03, 2013 at 02:11:34PM -0500, Scott Wood wrote:
On Thu, 2013-10-03 at 11:54 -0700, gre...@linuxfoundation.org wrote:
On Thu, Oct 03, 2013 at 01:33:27PM -0500, Scott Wood wrote:
What it looks like we do still want from the driver core is the ability
for a driver to say that it
On Mon, Sep 23, 2013 at 11:11:07AM +0100, Marc Zyngier wrote:
[...]
+static bool transparent_hugepage_adjust(pfn_t *pfnp, phys_addr_t *ipap)
+{
+ pfn_t pfn = *pfnp;
+ gfn_t gfn = *ipap PAGE_SHIFT;
+
+ if (PageTransCompound(pfn_to_page(pfn))) {
+
Support huge pages in KVM/ARM and KVM/ARM64. The pud_huge checking on
the unmap path may feel a bit silly as the pud_huge check is always
defined to false, but the compiler should be smart about this.
Note: This deals only with VMAs marked as huge which are allocated by
users through hugetlbfs
Support transparent huge pages in KVM/ARM and KVM/ARM64. The
transparent_hugepage_adjust is not very pretty, but this is also how
it's solved on x86 and seems to be simply an artifact on how THPs
behave. This should eventually be shared across architectures if
possible, but that can always be
This small series adds support for Transparent Huge Pages and hugetlbfs
pages for KVM on the arm and arm64 architectures.
Measurements have shown that using huge pages in for stage-2 mappings
provides up to more than 15% performance increase for some workloads.
The patch series applies to
On Wed, 2013-10-02 at 20:55 -0600, Alex Williamson wrote:
So far we've succeeded at making KVM and VFIO mostly unaware of each
other, but there's an important point where that breaks down. Intel
VT-d hardware may or may not support snoop control. When snoop
control is available, intel-iommu
-Original Message-
From: Wood Scott-B07421
Sent: Thursday, October 03, 2013 12:04 AM
To: Alexander Graf
Cc: Bhushan Bharat-R65777; kvm-...@vger.kernel.org; kvm@vger.kernel.org;
Bhushan
Bharat-R65777
Subject: Re: [PATCH 1/2] kvm/powerpc: rename kvm_hypercall() to
On Thu, Oct 03, 2013 at 08:21:20AM +1000, Benjamin Herrenschmidt wrote:
On Wed, 2013-10-02 at 17:37 +0300, Gleb Natapov wrote:
On Wed, Oct 02, 2013 at 04:33:18PM +0200, Paolo Bonzini wrote:
Il 02/10/2013 16:08, Alexander Graf ha scritto:
The hwrng is accessible by host userspace via
On Thu, Oct 03, 2013 at 08:07:22AM +1000, Benjamin Herrenschmidt wrote:
On Wed, 2013-10-02 at 13:02 +0300, Gleb Natapov wrote:
Yes, I alluded to it in my email to Paul and Paolo asked also. How this
interface is disabled? Also hwrnd is MMIO in a host why guest needs to
use hypercall
On Thu, 2013-10-03 at 08:43 +0300, Gleb Natapov wrote:
Why it can be a bad idea? User can drain hwrng continuously making other
users of it much slower, or even worse, making them fall back to another
much less reliable, source of entropy.
Not in a very significant way, we generate entropy at
From: Aneesh Kumar K.V aneesh.ku...@linux.vnet.ibm.com
This was introduced by 85a0d845d8 (KVM: PPC: Book3S PR: Allocate
kvm_vcpu structs from kvm_vcpu_cache).
arch/powerpc/kvm/book3s_pr.c: In function 'kvmppc_core_vcpu_create':
arch/powerpc/kvm/book3s_pr.c:1182:30: error: 'struct
On Thu, Oct 03, 2013 at 08:48:03AM +0300, Gleb Natapov wrote:
On Thu, Oct 03, 2013 at 08:45:42AM +1000, Paul Mackerras wrote:
On Wed, Oct 02, 2013 at 04:36:05PM +0200, Alexander Graf wrote:
On 02.10.2013, at 16:33, Paolo Bonzini wrote:
Il 02/10/2013 16:08, Alexander Graf ha
MMIO emulation reads the last instruction executed by the guest
and then emulates. If the guest is running in Little Endian mode,
the instruction needs to be byte-swapped before being emulated.
This patch stores the last instruction in the endian order of the
host, primarily doing a byte-swap if
On Thu, Oct 03, 2013 at 08:06:30PM +1000, Paul Mackerras wrote:
On Thu, Oct 03, 2013 at 08:48:03AM +0300, Gleb Natapov wrote:
On Thu, Oct 03, 2013 at 08:45:42AM +1000, Paul Mackerras wrote:
On Wed, Oct 02, 2013 at 04:36:05PM +0200, Alexander Graf wrote:
On 02.10.2013, at 16:33,
Hi,
There have been some work on the topic lately but no agreement has
been reached yet. I want to consolidate the facts in a single thread of
mail and re-start the discussion. Please find below a recap of what we
have as of today:
From a virtio POV, guest endianness is reflected by the
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need,personal loan, Debt consolidation? For more information,Contact us now for
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-Original Message-
From: Wood Scott-B07421
Sent: Thursday, October 03, 2013 12:04 AM
To: Alexander Graf
Cc: Bhushan Bharat-R65777; kvm-ppc@vger.kernel.org; k...@vger.kernel.org;
Bhushan
Bharat-R65777
Subject: Re: [PATCH 1/2] kvm/powerpc: rename kvm_hypercall() to
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