[PATCH RFC v2 00/10] EEH Support for VFIO PCI devices on PowerKVM guest
gwshan at linux.vnet.ibm.com
Fri May 9 17:54:01 EST 2014
On Fri, May 09, 2014 at 05:49:32PM +1000, Gavin Shan wrote:
Sorry for having missed cc'ing Alex Graf. Amending it.
>The series of patches intends to support EEH for PCI devices, which are
>passed through to PowerKVM based guest via VFIO. The implementation is
>straightforward based on the issues or problems we have to resolve to
>support EEH for PowerKVM based guest.
>- Emulation for EEH RTAS requests. All EEH RTAS requests goes to QEMU firstly.
> If QEMU can't handle it, the request will be sent to host via newly introduced
> VFIO container IOCTL command (VFIO_EEH_INFO) and gets handled in host kernel.
>- The error injection infrastructure need support request from the userland
> utility "errinjct" and PowerKVM based guest. The userland utility "errinjct"
> works on pSeries platform well with dedicated syscall, which helps invoking
> RTAS service to fulfil error injection in kernel. From the perspective, it's
> reasonable to extend the syscall to support PowerNV platform so that OPAL call
> can be invoked in host kernel for injecting errors. The data transported
> between userland and kerenl is still following "struct rtas_args" for both
> cases of PowerNV (OPAL) and pSeries (RTAS).
>The series of patches requires corresponding firmware changes from Mike Qiu to
>support error injection and QEMU changes to support EEH for guest. QEMU patchset
>will be sent separately.
>v1 -> v2:
> * EEH RTAS requests are routed to QEMU, and then possiblly to host kerenl.
> The mechanism KVM in-kernel handling is dropped.
> * Error injection is reimplemented based syscall, instead of KVM in-kerenl
> handling. The logic for error injection token management is moved to
> QEMU. The error injection request is routed to QEMU and then possiblly
> to host kernel.
>Testing on P7
>- Emulex adapter
>Testing on P8
>- Need more testing after design is finalized.
>Gavin Shan (10):
> drivers/vfio: Introduce CONFIG_VFIO_EEH
> powerpc/eeh: Info to trace passed devices
> powerpc/eeh: Search EEH device by guest address
> powerpc/eeh: Search EEH PE by guest address
> drivers/vfio: New IOCTL command VFIO_EEH_INFO
> powerpc/eeh: Avoid event on passed PE
> powerpc/powernv: Sync OPAL header file with firmware
> powerpc: Extend syscall ppc_rtas()
> powerpc/powernv: Implement ppc_call_opal()
> powerpc/powernv: Error injection infrastructure
>arch/powerpc/include/asm/eeh.h | 52 +++++++++++++
>arch/powerpc/include/asm/opal.h | 74 +++++++++++++++++-
>arch/powerpc/include/asm/rtas.h | 10 ++-
>arch/powerpc/include/asm/syscalls.h | 2 +-
>arch/powerpc/include/asm/systbl.h | 2 +-
>arch/powerpc/include/uapi/asm/unistd.h | 2 +-
>arch/powerpc/kernel/eeh.c | 8 ++
>arch/powerpc/kernel/eeh_pe.c | 80 +++++++++++++++++++
>arch/powerpc/kernel/rtas.c | 57 +++-----------
>arch/powerpc/kernel/syscalls.c | 50 ++++++++++++
>arch/powerpc/platforms/powernv/Makefile | 3 +-
>arch/powerpc/platforms/powernv/eeh-ioda.c | 3 +-
>arch/powerpc/platforms/powernv/eeh-vfio.c | 584 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
>arch/powerpc/platforms/powernv/errinject.c | 222 ++++++++++++++++++++++++++++++++++++++++++++++++++++
>arch/powerpc/platforms/powernv/opal-wrappers.S | 1 +
>arch/powerpc/platforms/powernv/opal.c | 93 ++++++++++++++++++++++
>drivers/vfio/Kconfig | 6 ++
>drivers/vfio/vfio_iommu_spapr_tce.c | 12 +++
>include/uapi/linux/vfio.h | 61 +++++++++++++++
>kernel/sys_ni.c | 2 +-
>20 files changed, 1271 insertions(+), 53 deletions(-)
>create mode 100644 arch/powerpc/platforms/powernv/eeh-vfio.c
>create mode 100644 arch/powerpc/platforms/powernv/errinject.c
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