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Linux 5.19 Adds Support For XSAVEC When Running As A VM Guest

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  • #1

    Linux 5.19 Adds Support For XSAVEC When Running As A VM Guest

    Phoronix: Linux 5.19 Adds Support For XSAVEC When Running As A VM Guest

    Various hypervisors expose support for the XSAVEC instruction as an XSAVE with compaction as an efficiency optimization. However, the Linux kernel doesn't currently make use of XSAVEC as an alternative to XSAVES (supervisor mode) but that is now changing with Linux 5.19...

    Linux 5.19 Adds Support For XSAVEC When Running As A VM Guest - Phoronix
    https://www.phoronix.com/scan.php?page=news_item&px=Linux-5.19-XSAVEC-Support
    Phoronix, Linux Hardware Reviews, Linux hardware benchmarks, Linux server benchmarks, Linux benchmarking, Desktop Linux, Linux performance, Open Source graphics, Linux How To, Ubuntu benchmarks, Ubuntu hardware, Phoronix Test Suite
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  • #2
    Does AMD CPUs support this instruction?
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    • #3
      Originally posted by Danny3 View Post
      Does AMD CPUs support this instruction?
      It's in the AMD64 Architecture Programmer's Manual Volume 4
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      • #4
        Originally posted by Danny3 View Post
        Does AMD CPUs support this instruction?
        Yes, from Zen 1 according to GCC machine types.
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