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hyperv: Support hv-xmm-input enlightenment

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qemu supports this enlightenment since version 7.10.

From the qemu commit:
    Hyper-V specification allows to pass parameters for certain hypercalls
    using XMM registers ("XMM Fast Hypercall Input"). When the feature is
    in use, it allows for faster hypercalls processing as KVM can avoid
    reading guest's memory.

Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
This commit is contained in:
Tim Wiederhake
2024-08-13 19:18:01 +02:00
parent 0313a500a9
commit 7b6702d516
33 changed files with 47 additions and 2 deletions
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2
docs/formatdomain.rst
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@@ -1990,6 +1990,7 @@ Hypervisors may allow certain CPU / machine features to be toggled on/off.
<ipi state='on'/>
<evmcs state='on'/>
<emsr_bitmap state='on'/>
<xmm_input state='on'/>
</hyperv>
<kvm>
<hidden state='on'/>
@@ -2079,6 +2080,7 @@ are:
evmcs Enable Enlightened VMCS on, off :since:`4.10.0 (QEMU 3.1)`
avic Enable use Hyper-V SynIC with hardware APICv/AVIC on, off :since:`8.10.0 (QEMU 6.2)`
emsr_bitmap Avoid unnecessary updates to L2 MSR Bitmap upon vmexits. on, off :since:`10.7.0 (QEMU 7.1)`
xmm_input Enable XMM Fast Hypercall Input on, off :since:`10.7.0 (QEMU 7.1)`
=============== ====================================================================== ============================================ =======================================================
:since:`Since 8.0.0`, the hypervisor can be configured further by setting