mirror of
https://github.com/torvalds/linux
synced 2024-10-10 13:24:04 +00:00
bc78b05bb4
If an AFU has a hardware bug that causes it to acknowledge a context terminate or remove while that context has outstanding transactions, it is possible for the kernel to receive an interrupt for that context after we have removed it from the context list. The kernel will not be able to demultiplex the interrupt (or worse - if we have already reallocated the process handle we could mis-attribute it to the new context), and printed a big scary warning. It did not acknowledge the interrupt, which would effectively halt further translation fault processing on the PSL. This patch makes the warning clearer about the likely cause of the issue (i.e. hardware bug) to make it obvious to future AFU designers of what needs to be fixed. It also prints out the process handle which can then be matched up with hardware and software traces for debugging. It also acknowledges the interrupt to the PSL with either an address error or acknowledge, so that the PSL can continue with other translations. Signed-off-by: Ian Munsie <imunsie@au1.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> |
||
|---|---|---|
| .. | ||
| base.c | ||
| context.c | ||
| cxl.h | ||
| debugfs.c | ||
| fault.c | ||
| file.c | ||
| irq.c | ||
| Kconfig | ||
| main.c | ||
| Makefile | ||
| native.c | ||
| pci.c | ||
| sysfs.c | ||