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| author | Sam Bobroff <sbobroff@linux.ibm.com> | 2018-11-29 04:16:41 +0100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2019-02-05 01:55:44 +0100 |
| commit | 1ef52073fd25ea97090eaff2c8b528ebf401a12a (patch) | |
| tree | 85d99a82f5dbd6386015ee73b704c744113b41f7 /drivers/vfio/vfio_spapr_eeh.c | |
| parent | powerpc/eeh: Add include_passed to eeh_clear_pe_frozen_state() (diff) | |
| download | linux-1ef52073fd25ea97090eaff2c8b528ebf401a12a.tar.xz linux-1ef52073fd25ea97090eaff2c8b528ebf401a12a.zip | |
powerpc/eeh: Improve recovery of passed-through devices
Currently, the EEH recovery process considers passed-through devices
as if they were not EEH-aware, which can cause them to be removed as
part of recovery. Because device removal requires cooperation from
the guest, this may lead to the process stalling or deadlocking.
Also, if devices are removed on the host side, they will be removed
from their IOMMU group, making recovery in the guest impossible.
Therefore, alter the recovery process so that passed-through devices
are not removed but are instead left frozen (and marked isolated)
until the guest performs it's own recovery. If firmware thaws a
passed-through PE because it's parent PE has been thawed (because it
was not passed through), re-freeze it.
Signed-off-by: Sam Bobroff <sbobroff@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'drivers/vfio/vfio_spapr_eeh.c')
| -rw-r--r-- | drivers/vfio/vfio_spapr_eeh.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/vfio/vfio_spapr_eeh.c b/drivers/vfio/vfio_spapr_eeh.c index 38edeb4729a9..1a742fe8f6db 100644 --- a/drivers/vfio/vfio_spapr_eeh.c +++ b/drivers/vfio/vfio_spapr_eeh.c @@ -74,13 +74,13 @@ long vfio_spapr_iommu_eeh_ioctl(struct iommu_group *group, ret = eeh_pe_get_state(pe); break; case VFIO_EEH_PE_RESET_DEACTIVATE: - ret = eeh_pe_reset(pe, EEH_RESET_DEACTIVATE); + ret = eeh_pe_reset(pe, EEH_RESET_DEACTIVATE, true); break; case VFIO_EEH_PE_RESET_HOT: - ret = eeh_pe_reset(pe, EEH_RESET_HOT); + ret = eeh_pe_reset(pe, EEH_RESET_HOT, true); break; case VFIO_EEH_PE_RESET_FUNDAMENTAL: - ret = eeh_pe_reset(pe, EEH_RESET_FUNDAMENTAL); + ret = eeh_pe_reset(pe, EEH_RESET_FUNDAMENTAL, true); break; case VFIO_EEH_PE_CONFIGURE: ret = eeh_pe_configure(pe); |