KVM_BOOK3S_64_HV also enable KVM_BOOK3S_64_PR, as far as I can
tell.
Thanks,
Paul.
The following changes since commit 09922076003ad66de41ea14d2f8c3b4a16ec7774:
Merge tag 'kvm-arm-for-v4.4-rc4' of
git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into kvm-master
(2015-12-04 18:3
t the value to 512 directly.
>
> While we're at it, also remove the KVM_MEM_SLOTS_NUM definition
> from the powerpc-specific header since this gets defined in the
> generic kvm_host.h header anyway.
>
> Signed-off-by: Thomas Huth
Thanks, applied to my kvm-ppc-next branch.
Pau
cc: sta...@vger.kernel.org.
Paul.
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On Tue, Dec 01, 2015 at 08:42:10PM -0300, Geyslan G. Bem wrote:
> The vcpu_book3s struct is assigned but never used. So remove it.
>
> Signed-off-by: Geyslan G. Bem
Thanks, applied to my kvm-ppc-next branch.
Paul.
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s like a good value for the
> time being (until we have some code in the future to resize the
> memslot array dynamically).
> And while we're at it, also remove the KVM_MEM_SLOTS_NUM definition
> from the powerpc-specific header since this gets defined in the
> generic kvm_host.h
t; +static long kvmppc_account_memlimit(long npages, bool inc)
> +{
> + long ret = 0;
> + const long bytes = sizeof(struct kvmppc_spapr_tce_table) +
> + (abs(npages) * sizeof(struct page *));
Why abs(npages)? Can npages be negative? If so, what does that
moved.
> A question, the kvmppc_mmu_book3s_64_init function is accessed by
> unconventional way? Because I have not found any calling to it.
Try arch/powerpc/kvm/book3s_pr.c line 410:
kvmppc_mmu_book3s_64_init(vcpu);
Grep (or git grep) is your friend.
Paul.
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This closes the hole by making kvmppc_set_msr_hv() check for the
illegal combination and force the TS field to a safe value (00,
meaning non-transactional).
Signed-off-by: Paul Mackerras
---
arch/powerpc/kvm/book3s_hv.c | 6 ++
1 file changed, 6 insertions(+)
diff --git a/arch/powerp
if the MCE occurred in hypervisor mode, we exit to the
host rather than trying to continue the guest.
Signed-off-by: Paul Mackerras
---
arch/powerpc/kvm/book3s_hv.c| 18 ++
arch/powerpc/kvm/book3s_hv_rmhandlers.S | 2 ++
2 files changed, 20 insertions(+)
diff --git
configured for static 2-way micro-threading mode.
Thanks,
Paul.
The following changes since commit a3eaa8649e4c6a6afdafaa04b9114fb230617bb1:
KVM: VMX: Fix commit which broke PML (2015-11-05 11:34:11 +0100)
are available in the git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/paulus
d-off-by: Paul Mackerras
---
arch/powerpc/kvm/book3s_hv.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index 2280497..becad3a 100644
--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c
@@ -2
. That should cause the guest to reload an appropriate entry
into the SLB and retry the faulting instruction. If it still faults,
we should find an appropriate SLB entry next time and be able to handle
the fault.
Signed-off-by: Paul Mackerras
---
arch/powerpc/kvm/book3s_hv_rmhandlers.S | 20
On Fri, Oct 16, 2015 at 08:41:31AM +0200, Thomas Huth wrote:
> Yes, we'll likely need this soon! 32 slots are not enough...
Would anyone object if I raised the limit for PPC to 512 slots?
Would that cause problems on embedded PPC, for instance?
Paul.
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Paolo,
Here is my current patch queue for KVM on PPC. There's nothing much
in the way of new features this time; it's mostly bug fixes, plus
Nikunj has implemented support for KVM_CAP_NR_MEMSLOTS. These are
intended for the "next" branch of the KVM tree. Please pull.
guest's point of view, the HPTE is valid.
Signed-off-by: Paul Mackerras
---
arch/powerpc/kvm/book3s_hv_rm_mmu.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/powerpc/kvm/book3s_hv_rm_mmu.c
b/arch/powerpc/kvm/book3s_hv_rm_mmu.c
index c1df9bb..97e7f8c 100644
--- a/arch/powerp
where the HPT is allocated at the time the first VCPU is run, if
no HPT has been allocated by ioctl by that time.
Signed-off-by: Paul Mackerras
---
arch/powerpc/kvm/book3s_64_mmu_hv.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/kvm/book3s_64_mmu_hv.c
b
nux.kernel/2046107
>
> Signed-off-by: Andrzej Hajda
Thanks, applied to my kvm-ppc-next branch.
Paul.
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in own function]
> Signed-off-by: Laurentiu Tudor
Thanks, applied to my kvm-ppc-next branch.
Paul.
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On Thu, Oct 01, 2015 at 03:58:03PM +0300, Laurentiu Tudor wrote:
> Fix couple of cases where we shift left a 32-bit
> value thus might get truncated results on 64-bit
> targets.
>
> Signed-off-by: Laurentiu Tudor
> Suggested-by: Scott Wood
Thanks, applied to my kvm-ppc-
;suspicious RCU usage" when
> >> lock debugging is enabled.
> >>
> >> Fixes: 99342cf8044420eebdf9297ca03a14cb6a7085a1 Signed-off-by:
> >> Thomas Huth
> >
> > Nice catch. Looks like I missed this because the places
> > kvm_io_bus_{read,write}() are called on x86 are
inside the guest, and then remove this vcore from the
preempted vcores list. That way, we avoid leaving this vcpu's vcore
on the preempted vcores list when the vcpu gets interrupted.
Fixes: ec2571650826
Reported-by: Thomas Huth
Signed-off-by: Paul Mackerras
---
arch/powerpc/kvm/book3s_hv.
On Tue, Sep 15, 2015 at 09:24:15PM -0400, Tejun Heo wrote:
> Hello, Paul.
>
> On Tue, Sep 15, 2015 at 04:38:18PM -0700, Paul E. McKenney wrote:
> > Well, the decision as to what is too big for -stable is owned by the
> > -stable maintainers, not by me.
>
> Is it
On Tue, Sep 15, 2015 at 06:28:11PM -0400, Tejun Heo wrote:
> Hello,
>
> On Tue, Sep 15, 2015 at 02:38:30PM -0700, Paul E. McKenney wrote:
> > I did take a shot at adding the rcu_sync stuff during this past merge
> > window, but it did not converge quickly enough to make it
evant areas, so probably best to just try them and see which
works best.
Thanx, Paul
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urrent invocation from all CPUs because multiple
concurrent *_expedited() calls will be satisfied by a single expedited
grace-period operation. Nevertheless, as Paolo points out, it is still
necessary to exercise caution when exposing synchronous grace periods
to userspace control.
On Sun, Sep 06, 2015 at 12:47:12PM -0700, Nathan Whitehorn wrote:
> Anything I can do to help move these along? It's a big performance
> improvement for FreeBSD guests.
These patches are in Paolo's kvm-ppc-next branch and should go into
Linus' tree in the next couple
).
Please let me know if you want me to re-post all the patches.
Thanks,
Paul.
The following changes since commit e3dbc572fe11a5231568e106fa3dcedd1d1bec0f:
Merge tag 'signed-kvm-ppc-next' of git://github.com/agraf/linux-2.6 into
kvm-queue (2015-08-22 14:57:59 -0700)
are available
core is on the exit path to the host.
This patch adds the missing comparison operation which will ensure
that when HOST_IPI flag is set, we unconditionally exit to the host.
Fixes: 66feed61cdf6
Cc: sta...@vger.kernel.org # v4.1+
Signed-off-by: Gautham R. Shenoy
Signed-off-by: Paul Mackerras
-
when the vcore pointer
in its PACA struct is set.
Fixes: b4deba5c41e9
Signed-off-by: Gautham R. Shenoy
Signed-off-by: Paul Mackerras
---
arch/powerpc/kvm/book3s_hv.c| 10 +-
arch/powerpc/kvm/book3s_hv_rmhandlers.S | 8
2 files changed, 17 insertions(+), 1 deletio
e fix this on both
the source and destination host, then the value will get migrated
across correctly.
I think Thomas's patch is fine, it just needs a stronger patch
description saying that it fixes an actual bug.
Paul.
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he assembly code in
book3s_hv_rmhandlers.S, this is actually a bug fix, isn't it?
How did you find it? Did you observe a failure of some kind, or did
you just find it by code inspection?
Paul.
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don't define any of the arch_*() hooks, but it will make qemu happy and
> > we can extend it in future if we need to.
> >
> > Signed-off-by: David Gibson
> > Reviewed-by: Eric Auger
>
> Paul is going to take care of the kvm-ppc tree for 4.3. Also, ppc kvm
a_range(kvm, start, end, kvm_unmap_rmapp);
kvm_handle_hva and kvm_handle_hva_range call the handler function
(kvm_unmap_rmapp in this case) one or more times, and return the
logical OR of the return values from the handler. Since
kvm_unmap_rmapp always returns 0, the return value from
kvm_handle_hva
On Thu, Jul 23, 2015 at 02:02:51PM +0200, Alexander Graf wrote:
>
> The host crash should only occur with dynamic micro-threading enabled,
> which is not in Linus' tree, correct?
Correct.
Paul.
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the bod
This series contains two fixes for the new dynamic micro-threading
code that was added recently for HV-mode KVM on Power servers.
The patches are against Alex Graf's kvm-ppc-queue branch. Please
apply.
Paul.
arch/powerpc/kvm/book3s_hv.c | 12 +---
1 file changed, 9 insertions(
ff-by: Paul Mackerras
---
arch/powerpc/kvm/book3s_hv.c | 9 +++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index 3d02276..fad52f2 100644
--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c
@@ -2
since the runner task may have moved to another CPU.
Signed-off-by: Paul Mackerras
---
arch/powerpc/kvm/book3s_hv.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index 6e3ef30..3d02276 100644
--- a/arch/powerpc/kvm
st context, since we haven't switched to the guest context.
Signed-off-by: Paul Mackerras
---
v3: Rename MAX_THREADS to MAX_SMT_THREADS to avoid a compile warning
arch/powerpc/include/asm/kvm_book3s_asm.h | 20 ++
arch/powerpc/include/asm/kvm_host.h | 3 +
arch/powerpc/kerne
st context, since we haven't switched to the guest context.
Signed-off-by: Paul Mackerras
---
v2: List allowed values for dynamic_mt_modes module parameter in the
module parameter description.
arch/powerpc/include/asm/kvm_book3s_asm.h | 20 ++
arch/powerpc/include/asm/kvm_host.h | 3
st context, since we haven't switched to the guest context.
Signed-off-by: Paul Mackerras
---
arch/powerpc/include/asm/kvm_book3s_asm.h | 20 ++
arch/powerpc/include/asm/kvm_host.h | 3 +
arch/powerpc/kernel/asm-offsets.c | 7 +
arch/powerpc/kvm/book3s_hv.c
implementations
have been tested using a FreeBSD guest.
Signed-off-by: Paul Mackerras
---
arch/powerpc/kvm/book3s_hv_rm_mmu.c | 126 ++--
arch/powerpc/kvm/book3s_hv_rmhandlers.S | 4 +-
2 files changed, 121 insertions(+), 9 deletions(-)
diff --git a/arch/powerpc/kvm
ages.
Signed-off-by: Paul Mackerras
---
arch/powerpc/include/asm/kvm_book3s.h | 1 +
arch/powerpc/include/asm/kvm_host.h | 2 ++
arch/powerpc/kvm/book3s_64_mmu_hv.c | 8 +++-
arch/powerpc/kvm/book3s_hv_rm_mmu.c | 17 +
4 files changed, 27 insertions(+), 1 deletion(-
fb
Cc: sta...@vger.kernel.org # v3.17+
Signed-off-by: Paul Mackerras
---
arch/powerpc/kvm/book3s_hv_rm_mmu.c | 18 --
1 file changed, 12 insertions(+), 6 deletions(-)
diff --git a/arch/powerpc/kvm/book3s_hv_rm_mmu.c
b/arch/powerpc/kvm/book3s_hv_rm_mmu.c
index b027a89..c6d601c 100644
--- a/ar
on
Tested-by: Laurent Vivier
Signed-off-by: Paul Mackerras
---
arch/powerpc/include/asm/kvm_host.h | 19 +-
arch/powerpc/kernel/asm-offsets.c | 2 +
arch/powerpc/kvm/book3s_hv.c| 333 ++--
arch/powerpc/kvm/book3s_hv_builtin.c| 7 +-
arc
following a suggestion by Aneesh.
I'd like to see these go into 4.2 if possible.
Paul.
---
arch/powerpc/include/asm/kvm_book3s.h | 1 +
arch/powerpc/include/asm/kvm_book3s_asm.h | 20 +
arch/powerpc/include/asm/kvm_host.h | 24 +-
arch/powerpc/kernel/asm-offsets.c
st context, since we haven't switched to the guest context.
Signed-off-by: Paul Mackerras
---
v2: Add a test (3 lines) to book3s_hv_rmhandlers.S to ensure that we
don't subtract the timebase offset in cases where we didn't add it.
This fixes a bug found in testing where the timeb
On Wed, Jun 17, 2015 at 07:30:09PM +0200, Laurent Vivier wrote:
>
> Tested-by: Laurent Vivier
>
> Performance is better, but Paul could you explain why it is better if I
> disable dynamic micro-threading ?
> Did I miss something ?
>
> My test system is an IBM Pow
which are the primary thread
for their subcore and therefore need to do the MMU switch. These
threads will need to be started even if they have no vcpu to run, so
we use the vcore pointer in the PACA rather than the vcpu pointer to
trigger them.
Signed-off-by: Paul Mackerras
---
arch/powerpc/include
other vcore that was wanting to run
on that core but got preempted does the logic kick in to try to run
both vcores at once.
Paul.
---
arch/powerpc/include/asm/kvm_book3s_asm.h | 20 +
arch/powerpc/include/asm/kvm_host.h | 22 +-
arch/powerpc/kernel/asm-offsets.c | 9 +
arch/po
means that vcpu->arch.ptid is no longer necessarily the same as
the physical thread that the vcpu runs on. In order to make it easier
for code that wants to send an IPI to know which CPU to target, we
now store that in a new field in struct vcpu_arch, called thread_cpu.
Signed-off-by: Paul Mackerr
8 419e0048 <813e1b20> 939e1b18 2f890001 409effcc
---[ end trace 8cdf50251cca6680 ]---
Fixes: 25fedfca94cf
Signed-off-by: Paul Mackerras
---
Since this is a regression fix for a patch that went in post 4.0,
it should go in for 4.1.
arch/powerpc/kvm/book3s_hv.c | 5 +++--
1 file changed, 3
On Tue, Apr 28, 2015 at 10:36:52AM +0530, Aneesh Kumar K.V wrote:
> Paul Mackerras writes:
>
> > The reference (R) and change (C) bits in a HPT entry can be set by
> > hardware at any time up until the HPTE is invalidated and the TLB
> > invalidation sequence has complete
fb
Cc: sta...@vger.kernel.org # v3.17+
Signed-off-by: Paul Mackerras
---
arch/powerpc/kvm/book3s_hv_rm_mmu.c | 8 +++-
1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/arch/powerpc/kvm/book3s_hv_rm_mmu.c
b/arch/powerpc/kvm/book3s_hv_rm_mmu.c
index f6bf0b1..5c1737f 100644
--- a/arch/p
implementations
are only compile tested.
Signed-off-by: Paul Mackerras
---
arch/powerpc/kvm/book3s_hv_rm_mmu.c | 126 ++--
arch/powerpc/kvm/book3s_hv_rmhandlers.S | 4 +-
2 files changed, 121 insertions(+), 9 deletions(-)
diff --git a/arch/powerpc/kvm/book3s_hv_rm_mmu.c
ages.
Signed-off-by: Paul Mackerras
---
arch/powerpc/include/asm/kvm_book3s.h | 1 +
arch/powerpc/include/asm/kvm_host.h | 2 ++
arch/powerpc/kvm/book3s_64_mmu_hv.c | 8 +++-
arch/powerpc/kvm/book3s_hv_rm_mmu.c | 17 +
4 files changed, 27 insertions(+), 1 deletion(-
The first two patches could go in immediately. I'd like to get
feedback from actual users of H_CLEAR_REF/MOD before the third patch
goes in.
These patches are against Alex Graf's kvm-ppc-queue branch.
Paul.
arch/powerpc/include/asm/kvm_host.h | 2 ++
arch/powerpc/kerne
On Wed, Apr 15, 2015 at 10:16:41PM +0200, Alexander Graf wrote:
>
>
> On 14.04.15 13:56, Paul Mackerras wrote:
> > Did you forget to push it out or something? Your kvm-ppc-queue branch
> > is still at 4.0-rc1 as far as I can see.
>
> Oops, not sure how that happened
On Thu, Apr 09, 2015 at 12:57:58AM +0200, Alexander Graf wrote:
> On 03/28/2015 04:21 AM, Paul Mackerras wrote:
> >This is the rest of my current patch queue for HV KVM on PPC. This
> >series is based on Alex Graf's kvm-ppc-queue branch. The only change
> >from th
On Sat, Apr 11, 2015 at 12:57:54PM -0700, Nathan Whitehorn wrote:
>
>
> On 02/18/15 15:33, Nathan Whitehorn wrote:
> >
> >On 02/18/15 14:00, Paul Mackerras wrote:
> >>On Wed, Feb 18, 2015 at 09:34:54AM +0100, Alexander Graf wrote:
> >>>>Am
howing a substantial reduction in the time spent per guest entry in
the real-mode guest entry code, and smaller reductions in the real
mode guest exit and interrupt handling times. (The test was to start
the guest and boot Fedora 20 big-endian to the login prompt.)
Signed-off-by: Paul Mackerras
-
: Paul Mackerras
---
arch/powerpc/include/asm/kvm_book3s_64.h | 2 +
arch/powerpc/kvm/book3s_hv_builtin.c | 63 ++
arch/powerpc/kvm/book3s_hv_rm_xics.c | 12 +-
arch/powerpc/kvm/book3s_hv_rmhandlers.S | 66
4 files changed, 75
next guest entry.
Signed-off-by: Paul Mackerras
---
arch/powerpc/include/asm/kvm_host.h | 15
arch/powerpc/kernel/asm-offsets.c | 2 +-
arch/powerpc/kvm/book3s_hv.c| 5 ++-
arch/powerpc/kvm/book3s_hv_builtin.c| 10 +++---
arch/powerpc/kvm/book3s_hv_rmhandlers.S
cause there are potentially
other vcpus waiting for the runner in kvmppc_wait_for_exec() which
then wouldn't get woken up.)
Also, we make use of the handy cond_resched_lock() function, which
unlocks and relocks vc->lock for us around the reschedule.
Signed-off-by: Paul Mackerras
---
and a little-endian POWER8 host.
Signed-off-by: Paul Mackerras
---
Note that this patch depends on the patch "powerpc/powernv: Fixes for
hypervisor doorbell handling", which is now upstream in Linus' tree as
commit 755563bc79c7, for the definition of PPC_MSGCLR().
arch/pow
kvmppc_run_vcpu() wake up another VCPU task to be
the runner if necessary.
This all means that the VCORE_STARTING state is no longer used, so we
remove it.
Signed-off-by: Paul Mackerras
---
arch/powerpc/include/asm/kvm_host.h | 5 ++--
arch/powerpc/kvm/book3s_hv.c| 56
anch of the kvm tree,
which includes 755563bc79c7, or you could cherry-pick 755563bc79c7 and
let the subsequent merge fix it up.
I would like to see these patches go into 4.1.
Paul.
arch/powerpc/include/asm/kvm_book3s_64.h | 4 +
arch/powerpc/include/asm/kvm_host.h | 44 ++-
arch/powerp
threads rather than polling vc->nap_count.
Besides reducing the size of the kvmppc_vcore struct by 8 bytes,
this also means that we can tell which secondary threads have got
stuck and thus print a more informative error message.
Signed-off-by: Paul Mackerras
---
arch/powerpc/include/asm/kvm_hos
ss. (The format of the
second through fourth fields are described in the Power ISA and also
in arch/powerpc/include/asm/mmu-hash64.h.)
Signed-off-by: Paul Mackerras
---
arch/powerpc/include/asm/kvm_book3s_64.h | 2 +
arch/powerpc/include/asm/kvm_host.h | 2 +
arch/powerpc/kvm
ode a little and remove the ext_interrupt_to_host
label.
* Add some comments about register usage.
* hcall_try_real_mode doesn't need to be global, and can't be
called from C code anyway.
Signed-off-by: Paul Mackerras
---
arch/powerpc/include/asm/kvm_host.h | 2 --
arch/pow
about 30ns for an hcall that
is handled in real mode (e.g. H_SET_DABR), which is about 25%. Since
production environments may not wish to incur this overhead, the new
code is conditional on a new config symbol,
CONFIG_KVM_BOOK3S_HV_EXIT_TIMING.
Signed-off-by: Paul Mackerras
---
arch/powerpc/i
thread will wake up on an IPI sent using msgsndp.
Signed-off-by: Paul Mackerras
---
arch/powerpc/kvm/book3s_hv_rmhandlers.S | 10 +++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S
b/arch/powerpc/kvm/book3s_hv_rmhandlers.S
index 9a2ad8f
guest decrementer value around the nap.
Signed-off-by: Paul Mackerras
---
arch/powerpc/kvm/book3s_hv_rmhandlers.S | 43 +++--
1 file changed, 41 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S
b/arch/powerpc/kvm/book3s_hv_rmhandl
On Fri, Mar 27, 2015 at 02:29:46PM +1100, Paul Mackerras wrote:
> This reads the timebase at various points in the real-mode guest
> entry/exit code and uses that to accumulate total, minimum and
> maximum time spent in those parts of the code. Currently these
> times are accumulated
fig
symbol, CONFIG_KVM_BOOK3S_HV_EXIT_TIMING.
Signed-off-by: Paul Mackerras
---
arch/powerpc/include/asm/kvm_host.h | 21 +
arch/powerpc/include/asm/time.h | 3 +
arch/powerpc/kernel/asm-offsets.c | 13 +++
arch/powerpc/kernel/time.c | 6 ++
arch/powerpc/k
guest decrementer value around the nap.
Signed-off-by: Paul Mackerras
---
arch/powerpc/kvm/book3s_hv_rmhandlers.S | 43 +++--
1 file changed, 41 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S
b/arch/powerpc/kvm/book3s_hv_rmhandl
ode a little and remove the ext_interrupt_to_host
label.
* Add some comments about register usage.
* hcall_try_real_mode doesn't need to be global, and can't be
called from C code anyway.
Signed-off-by: Paul Mackerras
---
arch/powerpc/include/asm/kvm_host.h | 2 --
arch/pow
next guest entry.
Signed-off-by: Paul Mackerras
---
arch/powerpc/include/asm/kvm_host.h | 15
arch/powerpc/kernel/asm-offsets.c | 2 +-
arch/powerpc/kvm/book3s_hv.c| 5 ++-
arch/powerpc/kvm/book3s_hv_builtin.c| 10 +++---
arch/powerpc/kvm/book3s_hv_rmhandlers.S
: Paul Mackerras
---
arch/powerpc/include/asm/kvm_book3s_64.h | 2 +
arch/powerpc/kvm/book3s_hv_builtin.c | 63 ++
arch/powerpc/kvm/book3s_hv_rm_xics.c | 12 +-
arch/powerpc/kvm/book3s_hv_rmhandlers.S | 66
4 files changed, 75
thread will wake up on an IPI sent using msgsndp.
Signed-off-by: Paul Mackerras
---
arch/powerpc/kvm/book3s_hv_rmhandlers.S | 10 +++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S
b/arch/powerpc/kvm/book3s_hv_rmhandlers.S
index 0a35b8d
threads rather than polling vc->nap_count.
Besides reducing the size of the kvmppc_vcore struct by 8 bytes,
this also means that we can tell which secondary threads have got
stuck and thus print a more informative error message.
Signed-off-by: Paul Mackerras
---
arch/powerpc/include/asm/kvm_hos
and a little-endian POWER8 host.
Signed-off-by: Paul Mackerras
---
Note that this patch depends on the patch "powerpc/powernv: Fixes for
hypervisor doorbell handling", which is now upstream in Linus' tree as
commit 755563bc79c7, for the definition of PPC_MSGCLR().
arch/pow
cause there are potentially
other vcpus waiting for the runner in kvmppc_wait_for_exec() which
then wouldn't get woken up.)
Also, we make use of the handy cond_resched_lock() function, which
unlocks and relocks vc->lock for us around the reschedule.
Signed-off-by: Paul Mackerras
---
howing a substantial reduction in the time spent per guest entry in
the real-mode guest entry code, and smaller reductions in the real
mode guest exit and interrupt handling times. (The test was to start
the guest and boot Fedora 20 big-endian to the login prompt.)
Signed-off-by: Paul Mackerras
-
w gone upstream into Linus' tree as commit
755563bc79c7 via the linuxppc-dev mailing list. Alex, how do you want
to handle that? You could pull in the master branch of the kvm tree,
or you could cherry-pick 755563bc79c7 and let the subsequent merge fix
it up.
Paul.
arch/powerpc/include
kvmppc_run_vcpu() wake up another VCPU task to be
the runner if necessary.
This all means that the VCORE_STARTING state is no longer used, so we
remove it.
Signed-off-by: Paul Mackerras
---
arch/powerpc/include/asm/kvm_host.h | 5 ++--
arch/powerpc/kvm/book3s_hv.c| 56
ss. (The format of the
second through fourth fields are described in the Power ISA and also
in arch/powerpc/include/asm/mmu-hash64.h.)
Signed-off-by: Paul Mackerras
---
arch/powerpc/include/asm/kvm_book3s_64.h | 2 +
arch/powerpc/include/asm/kvm_host.h | 2 +
arch/powerpc/kvm
-dev/2015-February/125315.html.
Alex, if you prefer me to post it to kvm-ppc@vger and kvm@vger, let me
know.
Paul.
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On Fri, Mar 20, 2015 at 12:28:25PM +0100, Alexander Graf wrote:
>
>
> On 20.03.15 10:39, Paul Mackerras wrote:
> > + /* On POWER8 for IPIs to threads in the same core, use msgsnd */
> > + if (cpu_has_feature(CPU_FTR_ARCH_207S) &&
> > + (cpu &a
On Fri, Mar 20, 2015 at 12:35:43PM +0100, Alexander Graf wrote:
>
>
> On 20.03.15 12:25, Paul Mackerras wrote:
> > On Fri, Mar 20, 2015 at 12:15:15PM +0100, Alexander Graf wrote:
> >> Have you measure the additional overhead this brings?
> >
> > I haven
On Fri, Mar 20, 2015 at 12:15:15PM +0100, Alexander Graf wrote:
>
>
> On 20.03.15 10:39, Paul Mackerras wrote:
> > This reads the timebase at various points in the real-mode guest
> > entry/exit code and uses that to accumulate total, minimum and
> > maximum time spent
On Fri, Mar 20, 2015 at 12:01:32PM +0100, Alexander Graf wrote:
>
>
> On 20.03.15 10:39, Paul Mackerras wrote:
> > From: Bharata B Rao
> >
> > Since KVM isn't equipped to handle closure of vcpu fd from userspace(QEMU)
> > correctly, certain work arounds
next guest entry.
Signed-off-by: Paul Mackerras
---
arch/powerpc/include/asm/kvm_host.h | 15
arch/powerpc/kernel/asm-offsets.c | 2 +-
arch/powerpc/kvm/book3s_hv.c| 5 ++-
arch/powerpc/kvm/book3s_hv_builtin.c| 10 +++---
arch/powerpc/kvm/book3s_hv_rmhandlers.S
ss. (The format of the
second through fourth fields are described in the Power ISA and also
in arch/powerpc/include/asm/mmu-hash64.h.)
Signed-off-by: Paul Mackerras
---
arch/powerpc/include/asm/kvm_book3s_64.h | 2 +
arch/powerpc/include/asm/kvm_host.h | 2 +
arch/powerpc/kvm
-off-by: Paul Mackerras
---
arch/powerpc/include/asm/kvm_book3s_64.h | 2 +
arch/powerpc/kvm/book3s_hv_builtin.c | 73
arch/powerpc/kvm/book3s_hv_rm_xics.c | 22 +
arch/powerpc/kvm/book3s_hv_rmhandlers.S | 81
4 files
between the real mode code and the
virtual mode code for the ICS/ICP resend and reject functions that
for now the code has been duplicated instead of sharing common code.
In the future, we can look at creating common functions.
Signed-off-by: Suresh Warrier
Signed-off-by: Paul Mackerras
---
arch
stantial reduction in the time spent in the real-mode
guest entry code, and smaller reductions in the real mode guest exit
and interrupt handling times. (The test was to start the guest and
boot Fedora 20 big-endian to the login prompt.)
Signed-off-by: Paul Mackerras
---
arch/pow
thread will wake up on an IPI sent using msgsndp.
Signed-off-by: Paul Mackerras
---
arch/powerpc/kvm/book3s_hv_rmhandlers.S | 10 +++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S
b/arch/powerpc/kvm/book3s_hv_rmhandlers.S
index c3b148d
threads out of the guest when exiting.
Signed-off-by: Paul Mackerras
---
arch/powerpc/kernel/asm-offsets.c | 4 +++
arch/powerpc/kvm/book3s_hv.c| 48 ++---
arch/powerpc/kvm/book3s_hv_rm_xics.c| 11
arch/powerpc/kvm
kvmppc_run_vcpu() wake up another VCPU task to be
the runner if necessary.
This all means that the VCORE_STARTING state is no longer used, so we
remove it.
Signed-off-by: Paul Mackerras
---
arch/powerpc/include/asm/kvm_host.h | 5 ++--
arch/powerpc/kvm/book3s_hv.c| 56
guest decrementer value around the nap.
Signed-off-by: Paul Mackerras
---
arch/powerpc/kvm/book3s_hv_rmhandlers.S | 43 +++--
1 file changed, 41 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S
b/arch/powerpc/kvm/book3s_hv_rmhandl
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