Messages in this thread | | | From | Jacob Xu <> | Date | Wed, 31 Jan 2024 10:16:55 -0800 | Subject | Re: [PATCH v3 0/2] x86: enforce and cleanup RIP-relative accesses in early boot code |
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On Wed, Jan 31, 2024 at 6:01 AM Borislav Petkov <bp@alien8.de> wrote: > > On Tue, Jan 30, 2024 at 10:08:43PM +0000, Kevin Loughlin wrote: > > Instead, this patchset continues the approach of fixing the immediate > > problem of SEV-SNP boots crashing when built by clang, providing a > > backport-friendly set of changes needed to successfully boot SEV-SNP > > hosts and guests. > > What use cases are those exactly? How do I reproduce them here? >
We're interested in fixing SEV-SNP guest boots which are currently broken when using a guest kernel compiled with clang. It seems like every other user of SEV/SNP linux kernel code uses GCC to compile the kernel so they've avoided this issue.
> SNP is not upstream yet and the SEV* code has been out there for a while > now without a single such report so this must be something new happening > due to <raisins>...?
E.g. Google COS uses clang to compile the kernel and we've made do with an internal fix for a while. We've unfortunately just been rather slow to report upstream.
> > Thx. > > -- > Regards/Gruss, > Boris. > > https://people.kernel.org/tglx/notes-about-netiquette
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