mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
synced 2025-01-08 15:04:45 +00:00
eecf398545
Explicitly return '0' for guest RIP when handling a PMI VM-Exit for a vCPU with protected guest state, i.e. when KVM can't read the real RIP. While there is no "right" value, and profiling a protect guest is rather futile, returning the last known RIP is worse than returning obviously "bad" data. E.g. for SEV-ES+, the last known RIP will often point somewhere in the guest's boot flow. Opportunistically add WARNs to effectively assert that the in_kernel() and get_ip() callbacks are restricted to the common PMI handler, as the return values for the protected guest state case are largely arbitrary, i.e. only make any sense whatsoever for PMIs, where the returned values have no functional impact and thus don't truly matter. Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com> Link: https://lore.kernel.org/r/20241009175002.1118178-5-seanjc@google.com Signed-off-by: Sean Christopherson <seanjc@google.com> |
||
|---|---|---|
| .. | ||
| boot | ||
| coco | ||
| configs | ||
| crypto | ||
| entry | ||
| events | ||
| hyperv | ||
| ia32 | ||
| include | ||
| kernel | ||
| kvm | ||
| lib | ||
| math-emu | ||
| mm | ||
| net | ||
| pci | ||
| platform | ||
| power | ||
| purgatory | ||
| ras | ||
| realmode | ||
| tools | ||
| um | ||
| video | ||
| virt | ||
| xen | ||
| .gitignore | ||
| Kbuild | ||
| Kconfig | ||
| Kconfig.assembler | ||
| Kconfig.cpu | ||
| Kconfig.debug | ||
| Makefile | ||
| Makefile_32.cpu | ||
| Makefile.postlink | ||
| Makefile.um | ||