From: "Aneesh Kumar K.V"
The type values H_RPTI_TYPE_PRT and H_RPTI_TYPE_PAT indicate
invalidating the caching of process and partition scoped entries
respectively.
Signed-off-by: Aneesh Kumar K.V
Signed-off-by: Bharata B Rao
Reviewed-by: David Gibson
---
arch/powerpc/include/as
In the nested KVM case, replace H_TLB_INVALIDATE by the new hcall
H_RPT_INVALIDATE if available. The availability of this hcall
is determined from "hcall-rpt-invalidate" string in ibm,hypertas-functions
DT property.
Signed-off-by: Bharata B Rao
Reviewed-by: Fabiano Rosas
Reviewed
Add a field to mmu_psize_def to store the page size encodings
of H_RPT_INVALIDATE hcall. Initialize this while scanning the radix
AP encodings. This will be used when invalidating with required
page size encoding in the hcall.
Signed-off-by: Bharata B Rao
Reviewed-by: David Gibson
---
arch
invalidation requests are forwarded to the
right nested guest, handled there and passed down to L0
for eventual handling.
Signed-off-by: Bharata B Rao
Signed-off-by: Aneesh Kumar K.V
[Nested guest partition-scoped invalidation changes]
---
.../include/asm/book3s/64/tlbflush-radix.h| 4
Now that we have H_RPT_INVALIDATE fully implemented, enable
support for the same via KVM_CAP_PPC_RPT_INVALIDATE KVM capability
Signed-off-by: Bharata B Rao
Reviewed-by: David Gibson
---
Documentation/virt/kvm/api.rst | 18 ++
arch/powerpc/kvm/powerpc.c | 3 +++
include
Hi,
A PowerPC KVM guest gets the following BUG message when booting
linux-next-20210623:
smp: Bringing up secondary CPUs ...
BUG: scheduling while atomic: swapper/1/0/0x
no locks held by swapper/1/0.
Modules linked in:
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.13.0-rc7-next-20210623
On Fri, Jun 25, 2021 at 11:16:08AM +0530, Srikar Dronamraju wrote:
> * Bharata B Rao [2021-06-24 21:25:09]:
>
> > A PowerPC KVM guest gets the following BUG message when booting
> > linux-next-20210623:
> >
> > smp: Bringing up secondary CPUs ...
> > BUG:
On Fri, Jun 25, 2021 at 09:28:09AM +0200, Peter Zijlstra wrote:
> On Fri, Jun 25, 2021 at 11:16:08AM +0530, Srikar Dronamraju wrote:
> > * Bharata B Rao [2021-06-24 21:25:09]:
> >
> > > A PowerPC KVM guest gets the following BUG message when booting
> > > linu
On Fri, Jun 25, 2021 at 12:16:52PM +0200, Peter Zijlstra wrote:
> You mean: CONFIG_PREEMPTION=n, what about CONFIG_PREEMPT_COUNT?
>
> Because if both are =n, then I don't see how that warning could trigger.
> in_atomic_preempt_off() would then result in prempt_count() == 0, and
> per the print
On Thu, May 06, 2021 at 03:45:21PM +1000, Nicholas Piggin wrote:
> Excerpts from Bharata B Rao's message of May 6, 2021 1:46 am:
> >
> > +static long kvmppc_h_rpt_invalidate(struct kvm_vcpu *vcpu,
> > + unsigned long id, unsigned long target,
> > +
allocation).
Signed-off-by: Bharata B Rao
---
arch/powerpc/kernel/setup_64.c | 34 +-
1 file changed, 25 insertions(+), 9 deletions(-)
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index 1ff258f6c76c..45ce2d6e8112 100644
--- a/arch
would invoke init_idle() via
> idle_thread_get(), which would have already reset the CPU's idle task's
> preempt_count to PREEMPT_ENABLED.
>
> Get rid of this preempt_count write.
>
> Cc: Guenter Roeck
> Fixes: f1a0a376ca0c ("sched/core: Initialize the idle task with preempti
here for long, so was just checking if it makes sense
here too.
>
> >
> > Signed-off-by: Bharata B Rao
> > ---
> > arch/powerpc/kernel/setup_64.c | 34 +-
> > 1 file changed, 25 insertions(+), 9 deletions(-)
> >
> >
On Mon, Jul 05, 2021 at 02:42:33PM +1000, David Gibson wrote:
> On Mon, Jun 21, 2021 at 02:20:00PM +0530, Bharata B Rao wrote:
> > diff --git a/arch/powerpc/include/asm/mmu_context.h
> > b/arch/powerpc/include/asm/mmu_context.h
> > index 4bc45d3ed8b0..b44f291fc909 100644
&
From: "Aneesh Kumar K.V"
The type values H_RPTI_TYPE_PRT and H_RPTI_TYPE_PAT indicate
invalidating the caching of process and partition scoped entries
respectively.
Signed-off-by: Aneesh Kumar K.V
Signed-off-by: Bharata B Rao
Reviewed-by: David Gibson
---
arch/powerpc/include/as
of H_RPT_INVALIDATE arguments
Bharata B Rao (5):
powerpc/book3s64/radix: Add H_RPT_INVALIDATE pgsize encodings to
mmu_psize_def
KVM: PPC: Book3S HV: Add support for H_RPT_INVALIDATE
KVM: PPC: Book3S HV: Nested support in H_RPT_INVALIDATE
KVM: PPC: Book3S HV: Add
Add a field to mmu_psize_def to store the page size encodings
of H_RPT_INVALIDATE hcall. Initialize this while scanning the radix
AP encodings. This will be used when invalidating with required
page size encoding in the hcall.
Signed-off-by: Bharata B Rao
Reviewed-by: David Gibson
---
arch
Now that we have H_RPT_INVALIDATE fully implemented, enable
support for the same via KVM_CAP_PPC_RPT_INVALIDATE KVM capability
Signed-off-by: Bharata B Rao
Reviewed-by: David Gibson
---
Documentation/virt/kvm/api.rst | 18 ++
arch/powerpc/kvm/powerpc.c | 3 +++
include
In the nested KVM case, replace H_TLB_INVALIDATE by the new hcall
H_RPT_INVALIDATE if available. The availability of this hcall
is determined from "hcall-rpt-invalidate" string in ibm,hypertas-functions
DT property.
Signed-off-by: Bharata B Rao
Reviewed-by: Fabiano Rosas
Reviewed
invalidation requests are forwarded to the
right nested guest, handled there and passed down to L0
for eventual handling.
Signed-off-by: Bharata B Rao
Signed-off-by: Aneesh Kumar K.V
[Nested guest partition-scoped invalidation changes]
---
.../include/asm/book3s/64/tlbflush-radix.h| 4
nge are to be invalidated.
Those which are partially covered are considered outside
invalidation range, which allows a caller to optimally invalidate
ranges that may contain mixed page sizes.
* Return H_SUCCESS on success.
Signed-off-by: Bharata B Rao
Reviewed-by: David Gibson
---
arch/powerpc/incl
On Tue, Mar 23, 2021 at 01:26:56PM +1100, David Gibson wrote:
> On Thu, Mar 11, 2021 at 02:09:36PM +0530, Bharata B Rao wrote:
> > H_RPT_INVALIDATE does two types of TLB invalidations:
> >
> > 1. Process-scoped invalidations for guests when LPCR[GTSE]=0.
> >This i
nge are to be invalidated.
Those which are partially covered are considered outside
invalidation range, which allows a caller to optimally invalidate
ranges that may contain mixed page sizes.
* Return H_SUCCESS on success.
Signed-off-by: Bharata B Rao
---
.../include/asm/book3s/64/tlbflush-radi
From: "Aneesh Kumar K.V"
The type values H_RPTI_TYPE_PRT and H_RPTI_TYPE_PAT indicate
invalidating the caching of process and partition scoped entries
respectively.
Signed-off-by: Aneesh Kumar K.V
Signed-off-by: Bharata B Rao
---
arch/powerpc/include/asm/hvcall.h | 4 ++--
1 file
Add a field to mmu_psize_def to store the page size encodings
of H_RPT_INVALIDATE hcall. Initialize this while scanning the radix
AP encodings. This will be used when invalidating with required
page size encoding in the hcall.
Signed-off-by: Bharata B Rao
---
arch/powerpc/include/asm/book3s/64
Now that we have H_RPT_INVALIDATE fully implemented, enable
support for the same via KVM_CAP_PPC_RPT_INVALIDATE KVM capability
Signed-off-by: Bharata B Rao
---
Documentation/virt/kvm/api.rst | 18 ++
arch/powerpc/kvm/powerpc.c | 3 +++
include/uapi/linux/kvm.h | 1
Kumar K.V (1):
KVM: PPC: Book3S HV: Fix comments of H_RPT_INVALIDATE arguments
Bharata B Rao (5):
powerpc/book3s64/radix: Add H_RPT_INVALIDATE pgsize encodings to
mmu_psize_def
KVM: PPC: Book3S HV: Add support for H_RPT_INVALIDATE
KVM: PPC: Book3S HV: Nested support in H_RPT_INVALIDATE
invalidation requests are forwarded to the
right nested guest, handled there and passed down to L0
for eventual handling.
Signed-off-by: Bharata B Rao
Signed-off-by: Aneesh Kumar K.V
[Nested guest partition-scoped invalidation changes]
---
arch/powerpc/include/asm/kvm_book3s.h | 3 +
arch
In the nested KVM case, replace H_TLB_INVALIDATE by the new hcall
H_RPT_INVALIDATE if available. The availability of this hcall
is determined from "hcall-rpt-invalidate" string in ibm,hypertas-functions
DT property.
Signed-off-by: Bharata B Rao
Reviewed-by: Fabiano Rosas
---
arch/p
On Tue, Mar 02, 2021 at 12:28:34PM +1100, David Gibson wrote:
> On Wed, Feb 24, 2021 at 01:55:08PM +0530, Bharata B Rao wrote:
> > Add a field to mmu_psize_def to store the page size encodings
> > of H_RPT_INVALIDATE hcall. Initialize this while scanning the radix
&
On Wed, Feb 24, 2021 at 12:58:02PM -0300, Fabiano Rosas wrote:
> > @@ -1590,6 +1662,24 @@ static int kvmppc_handle_nested_exit(struct kvm_vcpu
> > *vcpu)
> > if (!xics_on_xive())
> > kvmppc_xics_rm_complete(vcpu, 0);
> > break;
> > + case
On Tue, Mar 02, 2021 at 12:45:18PM +1100, David Gibson wrote:
> > diff --git a/Documentation/virt/kvm/api.rst b/Documentation/virt/kvm/api.rst
> > index 45fd862ac128..38ce3f21b21f 100644
> > --- a/Documentation/virt/kvm/api.rst
> > +++ b/Documentation/virt/kvm/api.rst
> > @@ -6225,6 +6225,24 @@
.
- Redid nested exit changes as per Paul Mackerras' suggestion.
- Folded the patch that added tlbie primitives into the
hcall implementation patch.
v4:
https://lore.kernel.org/linuxppc-dev/20210215063542.3642366-1-bhar...@linux.ibm.com/T/#t
Bharata B Rao (3):
powerpc/book3s64/radix: Add
In the nested KVM case, replace H_TLB_INVALIDATE by the new hcall
H_RPT_INVALIDATE if available. The availability of this hcall
is determined from "hcall-rpt-invalidate" string in ibm,hypertas-functions
DT property.
Signed-off-by: Bharata B Rao
Reviewed-by: Fabiano Rosas
---
arch/p
-by: Bharata B Rao
---
Documentation/virt/kvm/api.rst| 18 +++
.../include/asm/book3s/64/tlbflush-radix.h| 4 +
arch/powerpc/include/asm/kvm_book3s.h | 3 +
arch/powerpc/include/asm/mmu_context.h| 11 ++
arch/powerpc/kvm/book3s_hv.c | 90
Add a field to mmu_psize_def to store the page size encodings
of H_RPT_INVALIDATE hcall. Initialize this while scanning the radix
AP encodings. This will be used when invalidating with required
page size encoding in the hcall.
Signed-off-by: Bharata B Rao
---
arch/powerpc/include/asm/book3s/64
In the nested KVM case, replace H_TLB_INVALIDATE by the new hcall
H_RPT_INVALIDATE if available. The availability of this hcall
is determined from "hcall-rpt-invalidate" string in ibm,hypertas-functions
DT property.
Signed-off-by: Bharata B Rao
Reviewed-by: Fabiano Rosas
---
arch/p
hcall.
While we are here, move RIC_FLUSH definitions to header file
and introduce helper rpti_pgsize_to_psize() that will be needed
by the upcoming hcall.
Signed-off-by: Bharata B Rao
---
.../include/asm/book3s/64/tlbflush-radix.h| 18 +++
arch/powerpc/mm/book3s64/radix_tlb.c | 122
H_TLB_INVALIDATE hcall.
Signed-off-by: Bharata B Rao
---
Documentation/virt/kvm/api.rst | 17 +
arch/powerpc/include/asm/kvm_book3s.h | 3 +
arch/powerpc/include/asm/mmu_context.h | 11 +++
arch/powerpc/kvm/book3s_hv.c | 91
arch/powerpc/kvm
nested guest exit path.
v3:
https://lore.kernel.org/linuxppc-dev/20210105090557.2150104-1-bhar...@linux.ibm.com/T/#t
Bharata B Rao (3):
powerpc/book3s64/radix/tlb: tlbie primitives for process-scoped
invalidations from guests
KVM: PPC: Book3S HV: Add support for H_RPT_INVALIDATE
KVM
On Wed, Feb 17, 2021 at 11:38:07AM +1100, David Gibson wrote:
> On Mon, Feb 15, 2021 at 12:05:41PM +0530, Bharata B Rao wrote:
> > Implement H_RPT_INVALIDATE hcall and add KVM capability
> > KVM_CAP_PPC_RPT_INVALIDATE to indicate the support for the same.
> >
> > This
On Wed, Feb 17, 2021 at 11:24:48AM +1100, David Gibson wrote:
> On Mon, Feb 15, 2021 at 12:05:40PM +0530, Bharata B Rao wrote:
> > H_RPT_INVALIDATE hcall needs to perform process scoped tlbie
> > invalidations of L1 and nested guests from L0. This needs RS register
> >
On Fri, Aug 13, 2021 at 02:06:40PM +1000, Nicholas Piggin wrote:
> Excerpts from Bharata B Rao's message of August 5, 2021 5:24 pm:
> > Add asynchronous page fault support for pseries guests.
> >
> > 1. Setup the guest to handle async-pf
> >- Issue H_REG_SNS hcall to register the SNS region.
fulfilled by host leading the long delays in guest. This needs some
debugging.
- A few other aspects recommended by PAPR around this feature(like
setting of page state flags) need to be evaluated and incorporated
into the implementation if found appropriate.
Signed-off-by: Bharata B Rao
reused here.
TODO:
- Check how to keep this feature together with other CMO features.
- The async-pf check in the page fault handler path is limited to
guest with an #ifdef. This isn't sufficient and hence needs to
be replaced by an appropriate check.
Signed-off-by: Bharata B Rao
---
arch
Add a new KVM exit request KVM_REQ_ESN_EXIT that will be used
to exit to userspace (QEMU) whenever subvention notification
needs to be sent to the guest.
The userspace (QEMU) issues the subvention notification by
injecting an interrupt into the guest.
Signed-off-by: Bharata B Rao
---
arch
to the guest.
Signed-off-by: Bharata B Rao
---
arch/powerpc/include/asm/kvm_ppc.h | 3 ++-
arch/powerpc/kvm/book3s.c | 6 +++---
arch/powerpc/kvm/book3s_64_mmu_radix.c | 6 +++---
arch/powerpc/kvm/book3s_hv.c | 4 ++--
arch/powerpc/kvm/book3s_hv_nested.c| 4 ++--
arch
.
Bharata B Rao (5):
powerpc: Define Expropriation interrupt bit to VPA byte offset 0xB9
KVM: PPC: Add support for KVM_REQ_ESN_EXIT
KVM: PPC: Book3S: Enable setting SRR1 flags for DSI
KVM: PPC: BOOK3S HV: Async PF support
pseries: Asynchronous page fault support
Documentation/virt/kvm/api.rst
VPA byte offset 0xB9 was named as donate_dedicated_cpu as that
was the only used bit. The Expropriation/Subvention support defines
a bit in byte offset 0xB9. Define this bit and rename the field
in VPA to a generic name.
Signed-off-by: Bharata B Rao
---
arch/powerpc/include/asm/lppaca.h | 8
On Thu, Aug 05, 2021 at 12:54:34PM +0530, Bharata B Rao wrote:
> Hi,
>
> This series adds asynchronous page fault support for pseries guests
> and enables the support for the same in powerpc KVM. This is an
> early RFC with details and multiple TODOs listed in patch descriptions.
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