On Thu, 06 Nov 2014 16:40:43 -0800
Mario Smarduch m.smard...@samsung.com wrote:
kvm_get_dirty_log() provides generic handling of dirty bitmap, currently
reused
by several architectures. Building on that we intrdoduce
kvm_get_dirty_log_protect() adding write protection to mark these pages
On 07/11/2014 10:07, Cornelia Huck wrote:
+#if defined(CONFIG_S390) || defined(CONFIG_PPC) || defined(CONFIG_MIPS)
|| \
+defined(CONFIG_IA64) || defined(CONFIG_X86) || defined(CONFIG_ARM) ||
\
+defined(CONFIG_ARM64)
Does this deserve a config symbol that can be selected by
On 07/11/14 00:40, Mario Smarduch wrote:
Allow architectures to override the generic kvm_flush_remote_tlbs()
function via HAVE_KVM_ARCH_TLB_FLUSH_ALL. ARMv7 will need this to
provide its own TLB flush interface.
Reviewed-by: Paolo Bonzini pbonz...@redhat.com
Signed-off-by: Mario Smarduch
On 07/11/14 00:40, Mario Smarduch wrote:
This patch adds ARMv7 architecture TLB Flush function.
Acked-by: Christoffer Dall christoffer.dall at linaro.org
Signed-off-by: Mario Smarduch m.smard...@samsung.com
---
arch/arm/include/asm/kvm_asm.h |1 +
arch/arm/include/asm/kvm_host.h |
On 07/11/14 00:40, Mario Smarduch wrote:
Add support for initial write protection of VM memlsot. This patch
memslots
series assumes that huge PUDs will not be used in 2nd stage tables, which is
awlays valid on ARMv7.
always
Signed-off-by:
On 07/11/14 00:40, Mario Smarduch wrote:
Add support to track dirty pages between user space KVM_GET_DIRTY_LOG ioctl
calls. We call kvm_get_dirty_log_protect() function to do most of the work.
Signed-off-by: Mario Smarduch m.smard...@samsung.com
---
arch/arm/kvm/arm.c | 37
On 07/11/14 00:40, Mario Smarduch wrote:
This patch adds support for handling 2nd stage page faults during migration,
it disables faulting in huge pages, and dissolves huge pages to page tables.
In case migration is canceled huge pages are used again.
Reviewed-by: Christoffer Dall
repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux.git
tags/kvm-s390-next-20141107
for you to fetch changes up to 365dc1633521a32d55d839f56b41bb9a531d957a:
KVM: s390: Fixes for kvm/next (3.19) and stable
1
some control register changes will flush some aspects of the CPU, e.g.
POP explicitely mentions that for CR9-CR11 TLBs may be cleared.
Instead of trying to be clever and only flush on specific CRs, let
play safe and flush on all lctl(g) as future machines might define
new bits in CRs. Load control
ipte_unlock_siif uses cmpxchg to replace the in-memory data of the ipte
lock together with ACCESS_ONCE for the intial read.
union ipte_control {
unsigned long val;
struct {
unsigned long k : 1;
unsigned long kh : 31;
unsigned long
From: Dominik Dingel din...@linux.vnet.ibm.com
Documentation uses incorrect attribute names for some vm device
attributes: fix this.
Signed-off-by: Dominik Dingel din...@linux.vnet.ibm.com
Signed-off-by: Christian Borntraeger borntrae...@de.ibm.com
---
Documentation/virtual/kvm/devices/vm.txt |
From: Heiko Carstens heiko.carst...@de.ibm.com
According to the architecture all instructions are suppressing if memory
access is prohibited due to DAT protection, unless stated otherwise for
an instruction.
The lctl[g]/stctl[g] implementations handled this incorrectly since
control register
-rc3 (2014-11-02 15:01:51 -0800)
are available in the git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux.git
tags/kvm-s390-next-20141107
for you to fetch changes up to 365dc1633521a32d55d839f56b41bb9a531d957a
From: Jason J. Herne jjhe...@linux.vnet.ibm.com
As discussed, v2 moves TOD set/get functions to the setone/getone interface.
A high byte is also provided to account for future expansion.
Jason J. Herne (1):
kvm-s390: Provide guest TOD Clock Get/Set Controls
arch/s390/include/uapi/asm/kvm.h |
From: Jason J. Herne jjhe...@linux.vnet.ibm.com
Provide KVM_REG_S390_TOD and KVM_REG_S390_TOD_HIGH registers on s390 for
managing guest Time Of Day clock value.
KVM_REG_S390_TOD_HIGH is presently always set to 0. In the future it will
contain a high order expansion of the tod clock value after
On 07/11/2014 15:55, Jason J. Herne wrote:
From: Jason J. Herne jjhe...@linux.vnet.ibm.com
Provide KVM_REG_S390_TOD and KVM_REG_S390_TOD_HIGH registers on s390 for
managing guest Time Of Day clock value.
KVM_REG_S390_TOD_HIGH is presently always set to 0. In the future it will
contain a
Am 07.11.2014 um 16:06 schrieb Paolo Bonzini:
On 07/11/2014 15:55, Jason J. Herne wrote:
From: Jason J. Herne jjhe...@linux.vnet.ibm.com
Provide KVM_REG_S390_TOD and KVM_REG_S390_TOD_HIGH registers on s390 for
managing guest Time Of Day clock value.
KVM_REG_S390_TOD_HIGH is presently
On 07.11.14 16:10, Christian Borntraeger wrote:
Am 07.11.2014 um 16:06 schrieb Paolo Bonzini:
On 07/11/2014 15:55, Jason J. Herne wrote:
From: Jason J. Herne jjhe...@linux.vnet.ibm.com
Provide KVM_REG_S390_TOD and KVM_REG_S390_TOD_HIGH registers on s390 for
managing guest Time Of Day
here is my /proc/cpuinfo
processor : 0
vendor_id : CentaurHauls
cpu family : 6
model : 15
model name : VIA Nano processor U2250 (1.6GHz Capable)
stepping: 3
cpu MHz : 800.000
cache size : 1024 KB
fpu : yes
fpu_exception : yes
On Fri, 2014-11-07 at 10:47 -0500, Timothy McDaniel wrote:
here is my /proc/cpuinfo
processor : 0
vendor_id : CentaurHauls
cpu family : 6
model : 15
model name : VIA Nano processor U2250 (1.6GHz Capable)
stepping: 3
cpu MHz : 800.000
cache
2014-11-06 18:46+0100, Paolo Bonzini:
AVX instructions are just tweaks of the operand length and the alignment
restrictions of SSE instructions, and in fact the Avx bit is just a
duplicate of Unaligned. Drop it.
Suggested-by: Nadav Amit na...@cs.technion.ac.il
Signed-off-by: Paolo Bonzini
On 07/11/2014 17:43, Radim Krčmář wrote:
I think this forces our future AVX implementation to be very hacky,
we couldn't tell explicitly (un)aligned SSE2/AVX apart.
Ok, I'll apply Nadav's patch them.
Paolo
--
To unsubscribe from this list: send the line unsubscribe kvm in
the body of a
2014-11-06 11:15+0200, Nadav Amit:
As we run out of bits in the KVM emulator instruction flags, we can merge
together the Mmx/Sse/Avx bits. These bits are mutual exclusive (i.e., each
instruction is either MMX, SSE, AVX, or none), so we can save one bit in the
flags by merging them.
On 07/11/2014 18:37, Radim Krčmář wrote:
2014-11-06 11:15+0200, Nadav Amit:
As we run out of bits in the KVM emulator instruction flags, we can merge
together the Mmx/Sse/Avx bits. These bits are mutual exclusive (i.e., each
instruction is either MMX, SSE, AVX, or none), so we can save one
We now have a generic function that does most of the work of
kvm_vm_ioctl_get_dirty_log, now use it.
Signed-off-by: Paolo Bonzini pbonz...@redhat.com
---
Mario/Christoffer, please include this in the ARM series too
arch/x86/include/asm/kvm_host.h | 3 ---
arch/x86/kvm/mmu.c
2014-11-07 18:39+0100, Paolo Bonzini:
I think we have no clear idea of what Avx would do (I have one---same as
Sse but make VEX prefix mandatory, see VBROADCASTSS---but I'm not sure
it's the right one either). Let's keep these patches on hold.
Implementing Avx first makes sense, we don't want
On Thu, Nov 6, 2014 at 11:17 PM, Paolo Bonzini pbonz...@redhat.com wrote:
On 07/11/2014 07:27, Andy Lutomirski wrote:
Is there an easy benchmark that's sensitive to the time it takes to
round-trip from userspace to guest and back to userspace? I think I
may have a big speedup.
The
On Fri, Nov 7, 2014 at 9:59 AM, Andy Lutomirski l...@amacapital.net wrote:
On Thu, Nov 6, 2014 at 11:17 PM, Paolo Bonzini pbonz...@redhat.com wrote:
On 07/11/2014 07:27, Andy Lutomirski wrote:
Is there an easy benchmark that's sensitive to the time it takes to
round-trip from userspace to
On 11/07/2014 01:07 AM, Cornelia Huck wrote:
On Thu, 06 Nov 2014 16:40:43 -0800
Mario Smarduch m.smard...@samsung.com wrote:
kvm_get_dirty_log() provides generic handling of dirty bitmap, currently
reused
by several architectures. Building on that we intrdoduce
On 11/07/2014 01:44 AM, Marc Zyngier wrote:
On 07/11/14 00:40, Mario Smarduch wrote:
This patch adds ARMv7 architecture TLB Flush function.
Acked-by: Christoffer Dall christoffer.dall at linaro.org
Signed-off-by: Mario Smarduch m.smard...@samsung.com
---
arch/arm/include/asm/kvm_asm.h |
On 11/07/2014 02:15 AM, Marc Zyngier wrote:
On 07/11/14 00:40, Mario Smarduch wrote:
Add support for initial write protection of VM memlsot. This patch
memslots
series assumes that huge PUDs will not be used in 2nd stage tables, which is
awlays
On 11/07/2014 02:33 AM, Marc Zyngier wrote:
On 07/11/14 00:40, Mario Smarduch wrote:
This patch adds support for handling 2nd stage page faults during migration,
it disables faulting in huge pages, and dissolves huge pages to page tables.
In case migration is canceled huge pages are used
On 11/06/2014 11:38 PM, Paolo Bonzini wrote:
On 07/11/2014 01:40, Mario Smarduch wrote:
Add support to track dirty pages between user space KVM_GET_DIRTY_LOG ioctl
calls. We call kvm_get_dirty_log_protect() function to do most of the work.
Signed-off-by: Mario Smarduch
On 11/06/2014 11:44 PM, Paolo Bonzini wrote:
On 07/11/2014 01:40, Mario Smarduch wrote:
In the next patches, we will move parts of x86's kvm_vm_ioctl_get_dirty_log
implementation to generic code; leave the arch-specific code at the end,
similar to the existing generic function
On Fri, Nov 07, 2014 at 11:50:09AM -0800, Mario Smarduch wrote:
On 11/06/2014 11:44 PM, Paolo Bonzini wrote:
On 07/11/2014 01:40, Mario Smarduch wrote:
In the next patches, we will move parts of x86's kvm_vm_ioctl_get_dirty_log
implementation to generic code; leave the arch-specific
On Thu, Nov 06, 2014 at 04:40:45PM -0800, Mario Smarduch wrote:
This patch adds ARMv7 architecture TLB Flush function.
Acked-by: Christoffer Dall christoffer.dall at linaro.org
Signed-off-by: Mario Smarduch m.smard...@samsung.com
---
arch/arm/include/asm/kvm_asm.h |1 +
On Thu, Oct 09, 2014 at 07:34:06PM -0700, Mario Smarduch wrote:
This patch adds HYP VM TLB FLush function.
Signed-off-by: Mario Smarduch m.smard...@samsung.com
---
arch/arm64/kvm/hyp.S | 22 ++
1 file changed, 22 insertions(+)
diff --git a/arch/arm64/kvm/hyp.S
On Thu, Oct 09, 2014 at 07:34:05PM -0700, Mario Smarduch wrote:
This patch introduces header updates for ARMv8 dirty page logging.
hm, header updates,
it introduces functions to write protect pages on arm64 and adds a
prototype for blah blah blah.
Perhaps you can be just slightly more
On Thu, Oct 09, 2014 at 07:34:07PM -0700, Mario Smarduch wrote:
This patch enables ARMv8 dirty page logging and unifies ARMv7/ARMv8 code.
Signed-off-by: Mario Smarduch m.smard...@samsung.com
---
arch/arm/include/asm/kvm_host.h | 12
arch/arm/kvm/arm.c | 9
Hi Anup,
What are your plans in terms of follow-up on this one?
Should we review these patches and reply to anup _at_ brainfaul.org or
are you looking for someone else to pick them up?
Thanks,
-Christoffer
On Tue, Aug 05, 2014 at 02:54:09PM +0530, Anup Patel wrote:
This patchset enables PMU
Hi Anup,
[This time to the new email]
What are your plans in terms of follow-up on this one?
Should we review these patches and reply to anup _at_ brainfaul.org or
are you looking for someone else to pick them up?
Thanks,
-Christoffer
On Tue, Aug 05, 2014 at 02:54:09PM +0530, Anup Patel
On 11/07/2014 12:02 PM, Christoffer Dall wrote:
On Fri, Nov 07, 2014 at 11:50:09AM -0800, Mario Smarduch wrote:
On 11/06/2014 11:44 PM, Paolo Bonzini wrote:
On 07/11/2014 01:40, Mario Smarduch wrote:
In the next patches, we will move parts of x86's kvm_vm_ioctl_get_dirty_log
implementation
On 11/07/2014 12:18 PM, Christoffer Dall wrote:
On Thu, Nov 06, 2014 at 04:40:45PM -0800, Mario Smarduch wrote:
This patch adds ARMv7 architecture TLB Flush function.
Acked-by: Christoffer Dall christoffer.dall at linaro.org
Signed-off-by: Mario Smarduch m.smard...@samsung.com
---
On 11/07/2014 12:20 PM, Christoffer Dall wrote:
On Thu, Oct 09, 2014 at 07:34:05PM -0700, Mario Smarduch wrote:
This patch introduces header updates for ARMv8 dirty page logging.
hm, header updates,
it introduces functions to write protect pages on arm64 and adds a
prototype for blah blah
On 11/07/2014 12:20 PM, Christoffer Dall wrote:
On Thu, Oct 09, 2014 at 07:34:06PM -0700, Mario Smarduch wrote:
This patch adds HYP VM TLB FLush function.
Signed-off-by: Mario Smarduch m.smard...@samsung.com
---
arch/arm64/kvm/hyp.S | 22 ++
1 file changed, 22
On 11/07/2014 12:20 PM, Christoffer Dall wrote:
On Thu, Oct 09, 2014 at 07:34:07PM -0700, Mario Smarduch wrote:
This patch enables ARMv8 dirty page logging and unifies ARMv7/ARMv8 code.
Signed-off-by: Mario Smarduch m.smard...@samsung.com
---
arch/arm/include/asm/kvm_host.h | 12
On Fri, Nov 07, 2014 at 12:44:13PM -0800, Mario Smarduch wrote:
On 11/07/2014 12:02 PM, Christoffer Dall wrote:
On Fri, Nov 07, 2014 at 11:50:09AM -0800, Mario Smarduch wrote:
On 11/06/2014 11:44 PM, Paolo Bonzini wrote:
On 07/11/2014 01:40, Mario Smarduch wrote:
In the next patches,
Memory slots have to be page aligned to get entered into KVM. There
is existing logic that tries to ensure that we pad memory slots that
are not page aligned to the biggest region that would still fit in the
alignment requirements.
Unfortunately, that logic is broken. It tries to calculate the
On 07.11.14 22:18, Alexander Graf wrote:
Memory slots have to be page aligned to get entered into KVM. There
is existing logic that tries to ensure that we pad memory slots that
are not page aligned to the biggest region that would still fit in the
alignment requirements.
Unfortunately,
The syscall exit asm is a big mess. There's a really fast path, some
kind of fast path code (with a hard-coded optimization for audit), and
the really slow path. The result is that it's very hard to work with
this code. There are some asm paths that are much slower than they
should be (context
We used to optimize rescheduling and audit on syscall exit. Now that
the full slow path is reasonably fast, remove these optimizations.
This adds something like 10ns to the previously optimized paths on my
computer, presumably due mostly to SAVE_REST / RESTORE_REST.
I think that we should
The x86_64 entry code currently jumps through complex and
inconsisnent hoops to try to minimize the impact of syscall exit
work. For a true fast-path syscall, almost nothing needs to be
done, so returning is just a check for exit work and sysret. For a
full slow-path return from a syscall, the C
The int_ret_from_sys_call and syscall tracing code disagrees with
the sysret path as to the value of RCX.
The Intel SDM, the AMD APM, and my laptop all agree that sysret
returns with RCX == RIP. The syscall tracing code does not respect
this property.
For example, this program:
int main()
{
At least on Sandy Bridge, letting the CPU switch IA32_EFER is much
faster than switching it manually.
I benchmarked this using the vmexit kvm-unit-test (single run, but
GOAL multiplied by 5 to do more iterations):
Test Before AfterChange
cpuid
hi Paolo,
i find a typo of the comment.
From 09d5df31f0930e8e3eb10ad60a3debc53d6ce992 Mon Sep 17 00:00:00 2001
From: john_gong john_g...@yeah.net
Date: Fri, 7 Nov 2014 07:32:17 +0800
Subject: [PATCH] modify a typo of the comment
Signed-off-by: john_gong john_g...@yeah.net
---
On 02/11/2014 10:54, Nadav Amit wrote:
Commit 7fe864dc942c (KVM: x86: Emulator considers imm as memory operand)
marked VEX instructions as such in protected mode. VEX-prefix instructions
are
not supported relevant on real-mode and VM86, but should cause #UD instead of
being decoded as
On 07/11/2014 20:47, Mario Smarduch wrote:
That can happen if the error occurred in the final
copy to userspace, after page tables have been modified.
Upon error return userspace should terminate logging, error out whether
used for migration or other use cases, with some stale spte TLBs
On Thu, 06 Nov 2014 16:40:43 -0800
Mario Smarduch m.smard...@samsung.com wrote:
kvm_get_dirty_log() provides generic handling of dirty bitmap, currently
reused
by several architectures. Building on that we intrdoduce
kvm_get_dirty_log_protect() adding write protection to mark these pages
On 07/11/2014 10:07, Cornelia Huck wrote:
+#if defined(CONFIG_S390) || defined(CONFIG_PPC) || defined(CONFIG_MIPS)
|| \
+defined(CONFIG_IA64) || defined(CONFIG_X86) || defined(CONFIG_ARM) ||
\
+defined(CONFIG_ARM64)
Does this deserve a config symbol that can be selected by
On 07/11/14 00:40, Mario Smarduch wrote:
Allow architectures to override the generic kvm_flush_remote_tlbs()
function via HAVE_KVM_ARCH_TLB_FLUSH_ALL. ARMv7 will need this to
provide its own TLB flush interface.
Reviewed-by: Paolo Bonzini pbonz...@redhat.com
Signed-off-by: Mario Smarduch
On 07/11/14 00:40, Mario Smarduch wrote:
Add support for initial write protection of VM memlsot. This patch
memslots
series assumes that huge PUDs will not be used in 2nd stage tables, which is
awlays valid on ARMv7.
always
Signed-off-by:
On 07/11/14 00:40, Mario Smarduch wrote:
Add support to track dirty pages between user space KVM_GET_DIRTY_LOG ioctl
calls. We call kvm_get_dirty_log_protect() function to do most of the work.
Signed-off-by: Mario Smarduch m.smard...@samsung.com
---
arch/arm/kvm/arm.c | 37
On 07/11/14 00:40, Mario Smarduch wrote:
This patch adds support for handling 2nd stage page faults during migration,
it disables faulting in huge pages, and dissolves huge pages to page tables.
In case migration is canceled huge pages are used again.
Reviewed-by: Christoffer Dall
On 11/07/2014 01:07 AM, Cornelia Huck wrote:
On Thu, 06 Nov 2014 16:40:43 -0800
Mario Smarduch m.smard...@samsung.com wrote:
kvm_get_dirty_log() provides generic handling of dirty bitmap, currently
reused
by several architectures. Building on that we intrdoduce
On 11/07/2014 01:44 AM, Marc Zyngier wrote:
On 07/11/14 00:40, Mario Smarduch wrote:
This patch adds ARMv7 architecture TLB Flush function.
Acked-by: Christoffer Dall christoffer.dall at linaro.org
Signed-off-by: Mario Smarduch m.smard...@samsung.com
---
arch/arm/include/asm/kvm_asm.h |
On 11/07/2014 02:15 AM, Marc Zyngier wrote:
On 07/11/14 00:40, Mario Smarduch wrote:
Add support for initial write protection of VM memlsot. This patch
memslots
series assumes that huge PUDs will not be used in 2nd stage tables, which is
awlays
On 11/07/2014 02:33 AM, Marc Zyngier wrote:
On 07/11/14 00:40, Mario Smarduch wrote:
This patch adds support for handling 2nd stage page faults during migration,
it disables faulting in huge pages, and dissolves huge pages to page tables.
In case migration is canceled huge pages are used
On 11/06/2014 11:38 PM, Paolo Bonzini wrote:
On 07/11/2014 01:40, Mario Smarduch wrote:
Add support to track dirty pages between user space KVM_GET_DIRTY_LOG ioctl
calls. We call kvm_get_dirty_log_protect() function to do most of the work.
Signed-off-by: Mario Smarduch
On 11/06/2014 11:44 PM, Paolo Bonzini wrote:
On 07/11/2014 01:40, Mario Smarduch wrote:
In the next patches, we will move parts of x86's kvm_vm_ioctl_get_dirty_log
implementation to generic code; leave the arch-specific code at the end,
similar to the existing generic function
On Thu, Nov 06, 2014 at 04:40:45PM -0800, Mario Smarduch wrote:
This patch adds ARMv7 architecture TLB Flush function.
Acked-by: Christoffer Dall christoffer.dall at linaro.org
Signed-off-by: Mario Smarduch m.smard...@samsung.com
---
arch/arm/include/asm/kvm_asm.h |1 +
On 11/07/2014 12:02 PM, Christoffer Dall wrote:
On Fri, Nov 07, 2014 at 11:50:09AM -0800, Mario Smarduch wrote:
On 11/06/2014 11:44 PM, Paolo Bonzini wrote:
On 07/11/2014 01:40, Mario Smarduch wrote:
In the next patches, we will move parts of x86's kvm_vm_ioctl_get_dirty_log
implementation
On 11/07/2014 12:18 PM, Christoffer Dall wrote:
On Thu, Nov 06, 2014 at 04:40:45PM -0800, Mario Smarduch wrote:
This patch adds ARMv7 architecture TLB Flush function.
Acked-by: Christoffer Dall christoffer.dall at linaro.org
Signed-off-by: Mario Smarduch m.smard...@samsung.com
---
On Fri, Nov 07, 2014 at 12:44:13PM -0800, Mario Smarduch wrote:
On 11/07/2014 12:02 PM, Christoffer Dall wrote:
On Fri, Nov 07, 2014 at 11:50:09AM -0800, Mario Smarduch wrote:
On 11/06/2014 11:44 PM, Paolo Bonzini wrote:
On 07/11/2014 01:40, Mario Smarduch wrote:
In the next patches,
On 07/11/2014 20:47, Mario Smarduch wrote:
That can happen if the error occurred in the final
copy to userspace, after page tables have been modified.
Upon error return userspace should terminate logging, error out whether
used for migration or other use cases, with some stale spte TLBs
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