mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-21 12:49:08 +07:00
4d4cee96fb
Whenever we get an -EFAULT, we failed to read in guest 2 physical
address space. Such addressing exceptions are reported via a program
intercept to the nested hypervisor.
We faked the intercept, we have to return to guest 2. Instead, right
now we would be returning -EFAULT from the intercept handler, eventually
crashing the VM.
the correct thing to do is to return 1 as rc == 1 is the internal
representation of "we have to go back into g2".
Addressing exceptions can only happen if the g2->g3 page tables
reference invalid g2 addresses (say, either a table or the final page is
not accessible - so something that basically never happens in sane
environments.
Identified by manual code inspection.
Fixes:
|
||
|---|---|---|
| .. | ||
| diag.c | ||
| gaccess.c | ||
| gaccess.h | ||
| guestdbg.c | ||
| intercept.c | ||
| interrupt.c | ||
| irq.h | ||
| Kconfig | ||
| kvm-s390.c | ||
| kvm-s390.h | ||
| Makefile | ||
| priv.c | ||
| pv.c | ||
| sigp.c | ||
| trace-s390.h | ||
| trace.h | ||
| vsie.c | ||