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Re: [Qemu-arm] [PATCH v2 10/14] target/arm/kvm64: Add kvm_arch_get/put_s

From: Dave Martin
Subject: Re: [Qemu-arm] [PATCH v2 10/14] target/arm/kvm64: Add kvm_arch_get/put_sve
Date: Mon, 24 Jun 2019 12:05:35 +0100
User-agent: Mutt/1.5.23 (2014-03-12)

On Fri, Jun 21, 2019 at 05:34:18PM +0100, Andrew Jones wrote:
> These are the SVE equivalents to kvm_arch_get/put_fpsimd. Note, the
> swabbing is different than it is for fpsmid because the vector format
> is a little-endian stream of words.

Note, on big-endian hosts the FPSIMD view Vn and the SVE view Zn[127:0]
of the FPSIMD/SVE common register bits has the opposite endianness for

This only matters if mixing the two views: just from this patch I don't
know whether this is an issue for QEMU or not.

The kernel and gdb were recently found to be broken in this regard for
userspace [1] but the KVM interface should be unaffected.



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