From 9411e8b6faeb1d88d4441c63c5ec072a01b2914e Mon Sep 17 00:00:00 2001 From: Vitaly Kuznetsov Date: Wed, 25 May 2022 13:59:46 +0200 Subject: i386: Hyper-V XMM fast hypercall input feature 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. KVM supports the feature since v5.14. Rename HV_HYPERCALL_{PARAMS_XMM_AVAILABLE -> XMM_INPUT_AVAILABLE} to comply with KVM. Signed-off-by: Vitaly Kuznetsov Message-Id: <20220525115949.1294004-4-vkuznets@redhat.com> Signed-off-by: Paolo Bonzini --- docs/hyperv.txt | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'docs') diff --git a/docs/hyperv.txt b/docs/hyperv.txt index 5d85569b99..af1b10c0b3 100644 --- a/docs/hyperv.txt +++ b/docs/hyperv.txt @@ -249,6 +249,12 @@ Enlightened VMCS ('hv-evmcs') feature to also be enabled. Recommended: hv-evmcs (Intel) +3.23. hv-xmm-input +=================== +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. + 4. Supplementary features ========================= -- cgit 1.4.1