mirror of
https://github.com/torvalds/linux
synced 2024-10-23 11:46:42 +00:00
9abc2a08a7
The kernel now always uses vector registers when available, however KVM has special logic if support is really enabled for a guest. If support is disabled, guest_fpregs.fregs will only contain memory for the fpu. The kernel, however, will store vector registers into that area, resulting in crazy memory overwrites. Simply extending that area is not enough, because the format of the registers also changes. We would have to do additional conversions, making the code even more complex. Therefore let's directly use one place for the vector/fpu registers + fpc (in kvm_run). We just have to convert the data properly when accessing it. This makes current code much easier. Please note that vector/fpu registers are now always stored to vcpu->run->s.regs.vrs. Although this data is visible to QEMU and used for migration, we only guarantee valid values to user space when KVM_SYNC_VRS is set. As that is only the case when we have vector register support, we are on the safe side. 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 | ||
| sigp.c | ||
| trace-s390.h | ||
| trace.h | ||