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. > >Change log >========== >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 > >Thanks, >Gavin -- To unsubscribe from this list: send the line "unsubscribe kvm-ppc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
