4:27 +1100)
----
Paul Mackerras (1):
KVM: PPC: Book3S HV: Prohibit setting illegal transaction state in MSR
arch/powerpc/kvm/book3s_hv.c | 6 ++
1 file changed, 6 insertions(+)
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On Wed, Dec 09, 2015 at 11:34:07AM +0100, Thomas Huth wrote:
> Only using 32 memslots for KVM on powerpc is way too low, you can
> nowadays hit this limit quite fast by adding a couple of PCI devices
> and/or pluggable memory DIMMs to the guest.
>
> x86 already increased the KVM_USER_MEM_SLOTS to
On Fri, Nov 20, 2015 at 09:11:45AM +0100, Thomas Huth wrote:
> In the old DABR register, the BT (Breakpoint Translation) bit
> is bit number 61. In the new DAWRX register, the WT (Watchpoint
> Translation) bit is bit number 59. So to move the DABR-BT bit
> into the position of the DAWRX-WT bit, it
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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the body of
On Wed, Nov 04, 2015 at 10:03:48AM +0100, Thomas Huth wrote:
> Only using 32 memslots for KVM on powerpc is way too low, you can
> nowadays hit this limit quite fast by adding a couple of PCI devices
> and/or pluggable memory DIMMs to the guest.
> x86 already increased the limit to 512 in total, to
On Tue, Sep 15, 2015 at 08:49:35PM +1000, Alexey Kardashevskiy wrote:
> At the moment pages used for TCE tables (in addition to pages addressed
> by TCEs) are not counted in locked_vm counter so a malicious userspace
> tool can call ioctl(KVM_CREATE_SPAPR_TCE) as many times as RLIMIT_NOFILE and
> l
On Sun, Nov 29, 2015 at 05:14:03PM -0300, Geyslan Gregório Bem wrote:
> Hello,
>
> I have found a possible out of bounds reading in
> arch/powerpc/kvm/book3s_64_mmu.c (kvmppc_mmu_book3s_64_xlate
> function). pteg[] array could be accessed twice using the i variable
> after the for iteration. What
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
/powerpc.git kvm-ppc-fixes
for you to fetch changes up to f74f2e2e26199f695ca3df94f29e9ab7cb707ea4:
KVM: PPC: Book3S HV: Don't dynamically split core when already split
(2015-11-06 16:02:59 +1100)
Paul Mackerras (2):
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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KVM: PPC: Book3S HV: Handle H_DOORBELL on the guest exit path
Mahesh Salgaonkar (1):
KVM: PPC: Book3S HV: Deliver machine check with MSR(RI=0) to guest as MCE
Nikunj A Dadhania (1):
KVM: PPC: Implement extension to report number of memslots
Paul Mackerras (2):
KVM: PPC: Book3S HV
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
On Thu, Sep 24, 2015 at 04:00:23PM +0200, Andrzej Hajda wrote:
> The function can return negative value.
>
> The problem has been detected using proposed semantic patch
> scripts/coccinelle/tests/assign_signed_to_unsigned.cocci [1].
>
> [1]: http://permalink.gmane.org/gmane.linux.kernel/2046107
>
On Fri, Sep 25, 2015 at 06:02:23PM +0300, Laurentiu Tudor wrote:
> Emulate TMCFG0 TMRN register exposing one HW thread per vcpu.
>
> Signed-off-by: Mihai Caraman
> [laurentiu.tu...@freescale.com: rebased on latest kernel, use
> define instead of hardcoded value, moved code in own function]
> Sig
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-next branch.
Paul.
--
To
nux-next today. I was going to send you a
pull request tomorrow, but if you are about to send stuff off to Linus
you could pull now from:
git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git kvm-ppc-fixes
The three patches in there are:
Gautham R. Shenoy (1):
KVM: PPC: Book3S
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 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 of days.
Paul.
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To unsubscr
Paolo,
Please pull the commits listed below into your tree. I would like
them to go in for 4.3 as they are all small bug fixes not new
features, and they all can only affect HV-mode KVM on IBM server
machines (in fact one has no effect on code at all since it is a typo
fix for a comment).
Please
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
On Wed, Sep 02, 2015 at 08:25:05AM +1000, Benjamin Herrenschmidt wrote:
> On Tue, 2015-09-01 at 23:41 +0200, Thomas Huth wrote:
> > The size of the Problem State Priority Boost Register is only
> > 32 bits, so let's change the type of the corresponding variable
> > accordingly to avoid future troub
On Tue, Sep 01, 2015 at 11:41:18PM +0200, Thomas Huth wrote:
> The size of the Problem State Priority Boost Register is only
> 32 bits, so let's change the type of the corresponding variable
> accordingly to avoid future trouble.
Since we're already using lwz/stw in the assembly code in
book3s_hv_
On Wed, Aug 26, 2015 at 11:34:26AM +0200, Alexander Graf wrote:
>
>
> On 13.08.15 03:15, David Gibson wrote:
> > ec53500f "kvm: Add VFIO device" added a special KVM pseudo-device which is
> > used to handle any necessary interactions between KVM and VFIO.
> >
> > Currently that device is built o
On Mon, Aug 10, 2015 at 11:27:31AM -0400, Nicholas Krause wrote:
> This fixes the wrapper functions kvm_umap_hva_hv and the function
> kvm_unmap_hav_range_hv to return the return value of the function
> kvm_handle_hva or kvm_handle_hva_range that they are wrapped to
> call internally rather then al
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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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(+), 3 dele
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
This is my current queue of patches for HV KVM. This series is based
on the kvm next branch. They have all been posted 6 weeks ago or
more, though I have just added a 3-line fix to patch 2/5 to fix a bug
that we found in testing migration, and I expanded a comment (no code
change) in patch 3/5 fo
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 Power S822L.
>
> I run two guests
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
This patch series provides a way to use more of the capacity of each
processor core when running guests configured with threads=1, 2 or 4
on a POWER8 host with HV KVM, without having to change the static
micro-threading (the official name for split-core) mode for the whole
machine. The problem wit
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 main purpose of this series is to implement the H_CLEAR_REF and
H_CLEAR_MOD hypercalls defined by PAPR. We are doing this for the
sake of FreeBSD guests as Linux guests don't use them. Along the way
I found a couple of bugs, so the fixes for those are split out as the
first two patches.
The
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
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 the previous version of this series is that patch 2 has been
updated to take account of the timebase offset.
The last patch in this series needs a definiti
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
-
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 last patch in this series needs a definition of PPC_MSGCLR that is
added by the patch "powerpc/powernv: Fixes for hypervisor doorbell
handling", which has now gone upstream
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
On Fri, Mar 20, 2015 at 08:07:53PM +0800, kbuild test robot wrote:
> tree: git://github.com/agraf/linux-2.6.git kvm-ppc-queue
> head: 9b1daf3cfba1801768aa41b1b6ad0b653844241f
> commit: aba777f5ce0accb4c6a277e671de0330752954e8 [7/9] KVM: PPC: Book3S HV:
> Convert ICS mutex lock to spin lock
> c
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
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
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
ot;. This file contains one line for
each of the 5 timings above, with the name followed by a colon and
4 numbers, which are the count (number of times the code has been
executed), the total time, the minimum time, and the maximum time,
all in nanoseconds.
Signed-off-by: Paul Mackerras
---
ar
: Suresh Warrier
Signed-off-by: Paul Mackerras
---
arch/powerpc/kvm/book3s_xics.c | 68 +-
arch/powerpc/kvm/book3s_xics.h | 2 +-
2 files changed, 48 insertions(+), 22 deletions(-)
diff --git a/arch/powerpc/kvm/book3s_xics.c b/arch/powerpc/kvm/book3s_xics.c
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