Bug 214165
| Summary: | Missing clflush before RECEIVE_UPDATE_DATA | ||
|---|---|---|---|
| Product: | Virtualization | Reporter: | Masahiro Kozuka (masa.koz) |
| Component: | kvm | Assignee: | virtualization_kvm |
| Status: | NEW --- | ||
| Severity: | normal | CC: | seanjc |
| Priority: | P1 | ||
| Hardware: | x86-64 | ||
| OS: | Linux | ||
| Kernel Version: | 5.13.12 | Subsystem: | |
| Regression: | No | Bisected commit-id: | |
| Attachments: | Add the missing sev_clflush_pages() | ||
If you can provided a Signed-off-by, I'll happily write a changelog and post the patch on your behalf. Thanks! (In reply to Sean Christopherson from comment #1) > If you can provided a Signed-off-by, I'll happily write a changelog and post > the patch on your behalf. Thanks! Thabk you for your reply. Please use Signed-off-by: Masahiro Kozuka <masa.koz@kozuka.jp> |
Created attachment 298457 [details] Add the missing sev_clflush_pages() In sev_receive_update_data(), sev_clflush_pages() is not called b/w sev_pin_memory() and RECEIVE_UPDATE_DATA. Because of this missing, we will often see the pre-written contents in the memory updated by RECEIVE_UPDATE_DATA. I guess that we should call sev_clflush_pages() as LAUNCH_UPDATE_DATA.