From: Michael Ellerman <patch-notifications@ellerman.id.au>
To: Alexey Kardashevskiy <aik@ozlabs.ru>, linuxppc-dev@lists.ozlabs.org
Cc: "Jose Ricardo Ziviani" <joserz@linux.ibm.com>,
"Alexey Kardashevskiy" <aik@ozlabs.ru>,
"Alistair Popple" <alistair@popple.id.au>,
"Daniel Henrique Barboza" <danielhb413@gmail.com>,
"Piotr Jaroszynski" <pjaroszynski@nvidia.com>,
kvm-ppc@vger.kernel.org, "Sam Bobroff" <sbobroff@linux.ibm.com>,
"Alex Williamson" <alex.williamson@redhat.com>,
"Leonardo Augusto Guimarães Garcia" <lagarcia@br.ibm.com>,
"Reza Arbab" <arbab@linux.ibm.com>,
"David Gibson" <david@gibson.dropbear.id.au>
Subject: Re: [kernel, v6, 01/20] powerpc/ioda/npu: Call skiboot's hot reset hook when disabling NPU2
Date: Mon, 24 Dec 2018 00:28:04 +1100 (AEDT) [thread overview]
Message-ID: <43N38N53KKz9sNq@ozlabs.org> (raw)
In-Reply-To: <20181219085232.103441-2-aik@ozlabs.ru>
On Wed, 2018-12-19 at 08:52:13 UTC, Alexey Kardashevskiy wrote:
> The skiboot firmware has a hot reset handler which fences the NVIDIA V100
> GPU RAM on Witherspoons and makes accesses no-op instead of throwing HMIs:
> https://github.com/open-power/skiboot/commit/fca2b2b839a67
>
> Now we are going to pass V100 via VFIO which most certainly involves
> KVM guests which are often terminated without getting a chance to offline
> GPU RAM so we end up with a running machine with misconfigured memory.
> Accessing this memory produces hardware management interrupts (HMI)
> which bring the host down.
>
> To suppress HMIs, this wires up this hot reset hook to vfio_pci_disable()
> via pci_disable_device() which switches NPU2 to a safe mode and prevents
> HMIs.
>
> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
> Acked-by: Alistair Popple <alistair@popple.id.au>
> Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Series applied to powerpc next, thanks.
https://git.kernel.org/powerpc/c/ab7032e793f9ad799ca2692046fba5
cheers
next prev parent reply other threads:[~2018-12-23 13:57 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-19 8:52 [PATCH kernel v6 00/20] powerpc/powernv/npu, vfio: NVIDIA V100 + P9 passthrough Alexey Kardashevskiy
2018-12-19 8:52 ` [PATCH kernel v6 01/20] powerpc/ioda/npu: Call skiboot's hot reset hook when disabling NPU2 Alexey Kardashevskiy
2018-12-23 13:28 ` Michael Ellerman [this message]
2018-12-19 8:52 ` [PATCH kernel v6 02/20] powerpc/mm/iommu/vfio_spapr_tce: Change mm_iommu_get to reference a region Alexey Kardashevskiy
2018-12-19 8:52 ` [PATCH kernel v6 03/20] powerpc/vfio/iommu/kvm: Do not pin device memory Alexey Kardashevskiy
2018-12-19 8:52 ` [PATCH kernel v6 04/20] powerpc/powernv: Move npu struct from pnv_phb to pci_controller Alexey Kardashevskiy
2018-12-19 8:52 ` [PATCH kernel v6 05/20] powerpc/powernv/npu: Move OPAL calls away from context manipulation Alexey Kardashevskiy
2018-12-19 8:52 ` [PATCH kernel v6 06/20] powerpc/pseries/iommu: Use memory@ nodes in max RAM address calculation Alexey Kardashevskiy
2018-12-19 8:52 ` [PATCH kernel v6 07/20] powerpc/pseries/npu: Enable platform support Alexey Kardashevskiy
2018-12-19 8:52 ` [PATCH kernel v6 08/20] powerpc/pseries: Remove IOMMU API support for non-LPAR systems Alexey Kardashevskiy
2018-12-19 8:52 ` [PATCH kernel v6 09/20] powerpc/powernv/pseries: Rework device adding to IOMMU groups Alexey Kardashevskiy
2018-12-19 8:52 ` [PATCH kernel v6 10/20] powerpc/iommu_api: Move IOMMU groups setup to a single place Alexey Kardashevskiy
2018-12-19 8:52 ` [PATCH kernel v6 11/20] powerpc/powernv: Reference iommu_table while it is linked to a group Alexey Kardashevskiy
2018-12-19 8:52 ` [PATCH kernel v6 12/20] powerpc/powernv/npu: Move single TVE handling to NPU PE Alexey Kardashevskiy
2018-12-19 8:52 ` [PATCH kernel v6 13/20] powerpc/powernv/npu: Convert NPU IOMMU helpers to iommu_table_group_ops Alexey Kardashevskiy
2018-12-19 8:52 ` [PATCH kernel v6 14/20] powerpc/powernv/npu: Add compound IOMMU groups Alexey Kardashevskiy
2018-12-20 2:20 ` Alexey Kardashevskiy
2018-12-19 8:52 ` [PATCH kernel v6 15/20] powerpc/powernv/npu: Add release_ownership hook Alexey Kardashevskiy
2018-12-19 8:52 ` [PATCH kernel v6 16/20] powerpc/powernv/npu: Check mmio_atsd array bounds when populating Alexey Kardashevskiy
2018-12-19 8:52 ` [PATCH kernel v6 17/20] powerpc/powernv/npu: Fault user page into the hypervisor's pagetable Alexey Kardashevskiy
2018-12-19 8:52 ` [PATCH kernel v6 18/20] vfio_pci: Allow mapping extra regions Alexey Kardashevskiy
2018-12-19 16:43 ` Alex Williamson
2018-12-20 8:03 ` Christoph Hellwig
2018-12-19 8:52 ` [PATCH kernel v6 19/20] vfio_pci: Allow regions to add own capabilities Alexey Kardashevskiy
2018-12-19 16:44 ` Alex Williamson
2018-12-19 8:52 ` [PATCH kernel v6 20/20] vfio_pci: Add NVIDIA GV100GL [Tesla V100 SXM2] subdriver Alexey Kardashevskiy
2018-12-19 16:44 ` Alex Williamson
2018-12-20 1:10 ` [PATCH kernel v6.1 20/20 REPOST] " Alexey Kardashevskiy
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