Re: [RFC PATCH v12 10/33] KVM: Set the stage for handling only shared mappings in mmu_notifier events

On Wed, Sep 13, 2023 at 06:55:08PM -0700, Sean Christopherson wrote: > Add flags to "struct kvm_gfn_range" to let notifier events target only > shared and only private mappings, and write up the existing mmu_notifier > events to be shared-only (private memory is never associated with a > userspace

Re: [RFC PATCH v12 14/33] KVM: Add KVM_CREATE_GUEST_MEMFD ioctl() for guest-specific backing memory

On Wed, Sep 13, 2023 at 06:55:12PM -0700, Sean Christopherson wrote: > TODO > > Cc: Fuad Tabba > Cc: Vishal Annapurve > Cc: Ackerley Tng > Cc: Jarkko Sakkinen > Cc: Maciej Szmigiero > Cc: Vlastimil Babka > Cc: David Hildenbrand > Cc: Quentin Perret > C

[PATCH v2] powerpc/pseries/hotplug-cpu: wait indefinitely for vCPU death

n Cc: Cedric Le Goater Cc: Greg Kurz Cc: Nathan Lynch Signed-off-by: Michael Roth --- changes from v1: - renamed from "powerpc/pseries/hotplug-cpu: increase wait time for vCPU death" - wait indefinitely, but issue cond_resched() when RTAS reports that CPU hasn't stopped (Michael

Re: [PATCH] powerpc/pseries/hotplug-cpu: increase wait time for vCPU death

Quoting Nathan Lynch (2020-08-07 02:05:09) > Hi everyone, > > Michael Ellerman writes: > > Greg Kurz writes: > >> On Tue, 04 Aug 2020 23:35:10 +1000 > >> Michael Ellerman wrote: > >>> Spinning forever seems like a bad idea, but as has been demonstrated at > >>> least twice now, continuing when

Re: [PATCH] powerpc/pseries/hotplug-cpu: increase wait time for vCPU death

Quoting Michael Roth (2020-08-05 17:29:28) > Quoting Michael Roth (2020-08-04 23:37:32) > > Quoting Michael Ellerman (2020-08-04 22:07:08) > > > Greg Kurz writes: > > > > On Tue, 04 Aug 2020 23:35:10 +1000 > > > > Michael Ellerman wrote: >

Re: [PATCH] powerpc/pseries/hotplug-cpu: increase wait time for vCPU death

Quoting Michael Roth (2020-08-04 23:37:32) > Quoting Michael Ellerman (2020-08-04 22:07:08) > > Greg Kurz writes: > > > On Tue, 04 Aug 2020 23:35:10 +1000 > > > Michael Ellerman wrote: > > >> Spinning forever seems like a bad idea, but as has been

Re: [PATCH] powerpc/pseries/hotplug-cpu: increase wait time for vCPU death

Quoting Michael Ellerman (2020-08-04 22:07:08) > Greg Kurz writes: > > On Tue, 04 Aug 2020 23:35:10 +1000 > > Michael Ellerman wrote: > >> There is a bit of history to this code, but not in a good way :) > >> > >> Michael Roth writes: > >>

[PATCH] powerpc/pseries/hotplug-cpu: increase wait time for vCPU death

zilla.redhat.com/show_bug.cgi?id=1856588 Cc: Michael Ellerman Cc: Cedric Le Goater Cc: Greg Kurz Cc: Nathan Lynch Signed-off-by: Michael Roth --- arch/powerpc/platforms/pseries/hotplug-cpu.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/arch/powerpc/platforms/pseries/hotpl

[PATCH] KVM: PPC: Book3S HV: Fix H_CEDE return code for nested guests

far. Fix this by setting r3 to 0 after we finish processing the H_CEDE. RHBZ: 1778556 Fixes: 4bad77799fed ("KVM: PPC: Book3S HV: Handle hypercalls correctly when nested") Cc: linuxppc-...@ozlabs.org Cc: David Gibson Cc: Paul Mackerras Signed-off-by: Michael Roth --- arch/powerpc/kvm/

Re: [PATCH v5 1/2] powerpc/pseries/iommu: Share the per-cpu TCE page with the hypervisor.

Quoting Alexey Kardashevskiy (2019-12-11 16:47:30) > > > On 12/12/2019 07:31, Michael Roth wrote: > > Quoting Alexey Kardashevskiy (2019-12-11 02:15:44) > >> > >> > >> On 11/12/2019 02:35, Ram Pai wrote: > >>> On Tue, Dec 10

Re: [PATCH v5 2/2] powerpc/pseries/iommu: Use dma_iommu_ops for Secure VM.

Quoting Ram Pai (2019-12-12 00:45:02) > On Tue, Dec 10, 2019 at 07:43:24PM -0600, Michael Roth wrote: > > Quoting Ram Pai (2019-12-06 19:12:39) > > > Commit edea902c1c1e ("powerpc/pseries/iommu: Don't use dma_iommu_ops on > > > secure guests&quo

Re: [PATCH v5 1/2] powerpc/pseries/iommu: Share the per-cpu TCE page with the hypervisor.

Quoting Alexey Kardashevskiy (2019-12-11 02:15:44) > > > On 11/12/2019 02:35, Ram Pai wrote: > > On Tue, Dec 10, 2019 at 04:32:10PM +1100, Alexey Kardashevskiy wrote: > >> > >> > >> On 10/12/2019 16:12, Ram Pai wrote: > >>> On Tue, Dec 10, 2019 at 02:07:36PM +1100, Alexey Kardashevskiy wrote: >

Re: [PATCH v5 2/2] powerpc/pseries/iommu: Use dma_iommu_ops for Secure VM.

Quoting Alexey Kardashevskiy (2019-12-11 02:36:29) > > > On 11/12/2019 12:43, Michael Roth wrote: > > Quoting Ram Pai (2019-12-06 19:12:39) > >> Commit edea902c1c1e ("powerpc/pseries/iommu: Don't use dma_iommu_ops on > >> secure gue

Re: [PATCH v5 2/2] powerpc/pseries/iommu: Use dma_iommu_ops for Secure VM.

Quoting Ram Pai (2019-12-06 19:12:39) > Commit edea902c1c1e ("powerpc/pseries/iommu: Don't use dma_iommu_ops on > secure guests") > disabled dma_iommu_ops path, for secure VMs. Disabling dma_iommu_ops > path for secure VMs, helped enable dma_direct path. This enabled > support for

Re: [RFC v1 0/2] Enable IOMMU support for pseries Secure VMs

Quoting Michael S. Tsirkin (2019-11-06 12:06:37) > On Wed, Nov 06, 2019 at 12:59:50PM +1100, Alexey Kardashevskiy wrote: > > > > > > On 05/11/2019 08:28, Ram Pai wrote: > > > This patch series enables IOMMU support for pseries Secure VMs. > > > > > > > > > Tested using QEMU command line

[PATCH v2] KVM: PPC: Book3S HV: use smp_mb() when setting/clearing host_ipi flag

change in place the above workload ran for 20 hours without triggering any lock-ups. Fixes: 755563bc79c7 ("powerpc/powernv: Fixes for hypervisor doorbell handling") # v4.0 Cc: Michael Ellerman Cc: Paul Mackerras Cc: Nicholas Piggin Cc: kvm-...@vger.kernel.org Signed-off-by: Micha

Re: [PATCH] KVM: PPC: Book3S HV: add smp_mb() in kvmppc_set_host_ipi()

Quoting Michael Roth (2019-09-05 18:21:22) > Quoting Michael Ellerman (2019-09-04 22:04:48) > > That raises the question of whether this needs to be a full barrier or > > just a write barrier, and where is the matching barrier on the reading > > side? > > For this parti

Re: [PATCH] KVM: PPC: Book3S HV: add smp_mb() in kvmppc_set_host_ipi()

Quoting Michael Ellerman (2019-09-04 22:04:48) > Hi Mike, > > Thanks for the patch & great change log, just a few comments. Hi Michael, Thank you for the suggestions. I will roll them into v2 unless otherwise noted below. > > Michael Roth writes: > > On a 2-socket Wi

[PATCH] KVM: PPC: Book3S HV: add smp_mb() in kvmppc_set_host_ipi()

an for 6 hours (so far) without triggering any lock-ups. Cc: Paul Mackerras Cc: Nicholas Piggin Cc: kvm-...@vger.kernel.org Signed-off-by: Michael Roth --- arch/powerpc/include/asm/kvm_ppc.h | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/in

Re: [PATCH] bpf: fix overflow of bpf_jit_limit when PAGE_SIZE >= 64K

Quoting Daniel Borkmann (2018-12-10 08:26:31) > On 12/07/2018 04:36 PM, Michael Roth wrote: > > Quoting Michael Ellerman (2018-12-07 06:31:13) > >> Michael Roth writes: > >> > >>> Commit ede95a63b5 introduced a bpf_jit_limit tuneable to limit BPF > >&g

Re: [PATCH] bpf: fix overflow of bpf_jit_limit when PAGE_SIZE >= 64K

Quoting Michael Ellerman (2018-12-07 06:31:13) > Michael Roth writes: > > > Commit ede95a63b5 introduced a bpf_jit_limit tuneable to limit BPF > > JIT allocations. At compile time it defaults to PAGE_SIZE * 4, > > and is adjusted again at init time if

[PATCH] bpf: fix overflow of bpf_jit_limit when PAGE_SIZE >= 64K

") Cc: linuxppc-...@ozlabs.org Cc: Daniel Borkmann Cc: Sandipan Das Cc: Alexei Starovoitov Signed-off-by: Michael Roth --- kernel/bpf/core.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/kernel/bpf/core.c b/kernel/bpf/core.c index b1a3545d0ec8..55de4746cdfd 100644 --- a/

Re: [PATCH bpf] bpf: fix default unprivileged allocation limit

Quoting Sandipan Das (2018-12-06 03:27:32) > When using a large page size, the default value of the bpf_jit_limit > knob becomes invalid and users are not able to run unprivileged bpf > programs. > > The bpf_jit_limit knob is represented internally as a 32-bit signed > integer because of which

[PATCH] KVM: PPC: Book3S HV: fix handling for interrupted H_ENTER_NESTED

DAR 772f9539 DSISR 4200 Fix this by setting vcpu->arch.hcall_needed = 0 to indicate completion of H_ENTER_NESTED before we exit to L0 userspace. Cc: linuxppc-...@ozlabs.org Cc: David Gibson Cc: Paul Mackerras Cc: Suraj Jitindar Singh Signed-off-by: Michael Roth --- arch/powerpc

[PATCH] powerpc/pseries: advertise Hot Plug Event support to firmware

only need to advertise it via CAS and do not need a corresponding FW_FEATURE_* value to test for. Cc: Michael Ellerman <m...@ellerman.id.au> Cc: Nathan Fontenot <nf...@linux.vnet.ibm.com> Cc: David Gibson <da...@gibson.dropbear.id.au> Signed-off-by: Michael Roth <mdr...@linux.vnet.ibm

Re: [PATCH v6 3/3] powerpc/pseries: Implement indexed-count hotplug memory remove

Quoting Nathan Fontenot (2016-10-18 12:21:06) > From: Sahil Mehta > > Indexed-count remove for memory hotplug guarantees that a contiguous block > of lmbs beginning at a specified will be unassigned (NOT > that lmbs will be removed). Because of Qemu's per-DIMM memory >

Re: [PATCH v4 2/2] powerpc/pseries: Implement indexed-count hotplug memory remove

Quoting Sahil Mehta (2016-08-01 12:23:16) > Indexed-count remove for memory hotplug guarantees that a contiguous block > of lmbs beginning at a specified will be unassigned (NOT > that lmbs will be removed). Because of Qemu's per-DIMM memory > management, the removal of a contiguous block of