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[{"id":483,"title":"Self-taught through trial and error","votes":548,"type":"x","order":1,"pct":78.51,"resources":[]},{"id":484,"title":"Formal training or courses","votes":30,"type":"x","order":2,"pct":4.3,"resources":[]},{"id":485,"title":"A job that required it","votes":34,"type":"x","order":3,"pct":4.87,"resources":[]},{"id":486,"title":"Other","votes":86,"type":"x","order":4,"pct":12.32,"resources":[]}] ["#ff5b00","#4ac0f2","#b80028","#eef66c","#60bb22","#b96a9a","#62c2cc"] ["rgba(255,91,0,0.7)","rgba(74,192,242,0.7)","rgba(184,0,40,0.7)","rgba(238,246,108,0.7)","rgba(96,187,34,0.7)","rgba(185,106,154,0.7)","rgba(98,194,204,0.7)"] 350
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67

Enhancing AMD SEV-SNP Support For Legacy VMs In Linux 6.2-rc6

Merged on Sunday prior to tagging Linux 6.2-rc6 is a late "fix" for the AMD Secure Encrypted Virtualization Secure Nested Paging (SEV-SNP) code to avoid possible situations of undefined behavior with difficult to debug issues where a modern Linux host with SEV-SNP may try booting a Linux virtual machine with an outdated kernel. . Some AMD SEV-SNP features need guest-side support to work correctly and so if a modern Linux host with a recent kernel that supports newer features of modern AMD EPYC CPUs tries booting a guest virtual machine with a kernel lacking support for some SEV features, there can be problems -- problems that aren't necessarily straight-forward to diagnose. Surprisingly it took until yesterday for the mainline Linux kernel to receive SEV-SNP guest feature negotiation support to deal with this real possibility of the host/hypervisor having a newer kernel than what is found on the guest VMs. This is being treated as a fix so it was picked up for Linux 6.2-rc6 rather than waiting for the next merge window. In turn it will also be back-ported soon to stable Linux kernel series. The link for this article located at Phoronix is no longer available. . Solution for AMD SEV-SNP to improve compatibility between contemporary Linux hosts and legacy virtual machines in the kernel.. AMD SEV-SNP, Kernel Updates, Virtual Machine Management. . LinuxSecurity.com Team

Calendar 2 Jan 30, 2023 User Avatar LinuxSecurity.com Team Cryptography
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[{"id":483,"title":"Self-taught through trial and error","votes":548,"type":"x","order":1,"pct":78.51,"resources":[]},{"id":484,"title":"Formal training or courses","votes":30,"type":"x","order":2,"pct":4.3,"resources":[]},{"id":485,"title":"A job that required it","votes":34,"type":"x","order":3,"pct":4.87,"resources":[]},{"id":486,"title":"Other","votes":86,"type":"x","order":4,"pct":12.32,"resources":[]}] ["#ff5b00","#4ac0f2","#b80028","#eef66c","#60bb22","#b96a9a","#62c2cc"] ["rgba(255,91,0,0.7)","rgba(74,192,242,0.7)","rgba(184,0,40,0.7)","rgba(238,246,108,0.7)","rgba(96,187,34,0.7)","rgba(185,106,154,0.7)","rgba(98,194,204,0.7)"] 350
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