| Message ID | 20220525115949.1294004-1-vkuznets@redhat.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | i386: Enable newly introduced KVM Hyper-V enlightenments | expand |
On 5/25/22 13:59, Vitaly Kuznetsov wrote: > Changes since v3: > - Rebase, resolve merge conflict with 73d24074078a ("hyperv: Add support to > process syndbg commands") > - Include "i386: docs: Convert hyperv.txt to rST" patch which was previously > posted separately. Thank you very much for reposting this. Paolo > Original description: > > This series enables four new KVM Hyper-V enlightenmtes: > > 'XMM fast hypercall input feature' is supported by KVM since v5.14, > it allows for faster Hyper-V hypercall processing. > > 'Enlightened MSR-Bitmap' is a new nested specific enlightenment speeds up > L2 vmexits by avoiding unnecessary updates to L2 MSR-Bitmap. KVM support > for the feature on Intel CPUs is in v5.17 and in 5.18 for AMD CPUs. > > 'Extended GVA ranges for TLB flush hypercalls' indicates that extended GVA > ranges are allowed to be passed to Hyper-V TLB flush hypercalls. > > 'Direct TLB flush hypercall' features allows L0 (KVM) to directly handle > L2's TLB flush hypercalls without the need to exit to L1 (Hyper-V). > > The last two features are not merged in KVM yet: > https://lore.kernel.org/kvm/20220525090133.1264239-1-vkuznets@redhat.com/ > however, there's no direct dependency on the kernel part as thanks to > KVM_GET_SUPPORTED_HV_CPUID no new capabilities are introduced. > > Vitaly Kuznetsov (6): > i386: Use hv_build_cpuid_leaf() for HV_CPUID_NESTED_FEATURES > i386: Hyper-V Enlightened MSR bitmap feature > i386: Hyper-V XMM fast hypercall input feature > i386: Hyper-V Support extended GVA ranges for TLB flush hypercalls > i386: Hyper-V Direct TLB flush hypercall > i386: docs: Convert hyperv.txt to rST > > docs/hyperv.txt | 270 ------------------------------- > docs/system/i386/hyperv.rst | 288 +++++++++++++++++++++++++++++++++ > docs/system/target-i386.rst | 1 + > target/i386/cpu.c | 8 + > target/i386/cpu.h | 5 +- > target/i386/kvm/hyperv-proto.h | 9 +- > target/i386/kvm/kvm.c | 55 +++++-- > 7 files changed, 354 insertions(+), 282 deletions(-) > delete mode 100644 docs/hyperv.txt > create mode 100644 docs/system/i386/hyperv.rst >
Changes since v3: - Rebase, resolve merge conflict with 73d24074078a ("hyperv: Add support to process syndbg commands") - Include "i386: docs: Convert hyperv.txt to rST" patch which was previously posted separately. Original description: This series enables four new KVM Hyper-V enlightenmtes: 'XMM fast hypercall input feature' is supported by KVM since v5.14, it allows for faster Hyper-V hypercall processing. 'Enlightened MSR-Bitmap' is a new nested specific enlightenment speeds up L2 vmexits by avoiding unnecessary updates to L2 MSR-Bitmap. KVM support for the feature on Intel CPUs is in v5.17 and in 5.18 for AMD CPUs. 'Extended GVA ranges for TLB flush hypercalls' indicates that extended GVA ranges are allowed to be passed to Hyper-V TLB flush hypercalls. 'Direct TLB flush hypercall' features allows L0 (KVM) to directly handle L2's TLB flush hypercalls without the need to exit to L1 (Hyper-V). The last two features are not merged in KVM yet: https://lore.kernel.org/kvm/20220525090133.1264239-1-vkuznets@redhat.com/ however, there's no direct dependency on the kernel part as thanks to KVM_GET_SUPPORTED_HV_CPUID no new capabilities are introduced. Vitaly Kuznetsov (6): i386: Use hv_build_cpuid_leaf() for HV_CPUID_NESTED_FEATURES i386: Hyper-V Enlightened MSR bitmap feature i386: Hyper-V XMM fast hypercall input feature i386: Hyper-V Support extended GVA ranges for TLB flush hypercalls i386: Hyper-V Direct TLB flush hypercall i386: docs: Convert hyperv.txt to rST docs/hyperv.txt | 270 ------------------------------- docs/system/i386/hyperv.rst | 288 +++++++++++++++++++++++++++++++++ docs/system/target-i386.rst | 1 + target/i386/cpu.c | 8 + target/i386/cpu.h | 5 +- target/i386/kvm/hyperv-proto.h | 9 +- target/i386/kvm/kvm.c | 55 +++++-- 7 files changed, 354 insertions(+), 282 deletions(-) delete mode 100644 docs/hyperv.txt create mode 100644 docs/system/i386/hyperv.rst