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i386: Hyper-V Support extended GVA ranges for TLB flush hypercalls

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KVM kind of supported "extended GVA ranges" (up to 4095 additional GFNs
per hypercall) since the implementation of Hyper-V PV TLB flush feature
(Linux-4.18) as regardless of the request, full TLB flush was always
performed. "Extended GVA ranges for TLB flush hypercalls" feature bit
wasn't exposed then. Now, as KVM gains support for fine-grained TLB
flush handling, exposing this feature starts making sense.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20220525115949.1294004-5-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Vitaly Kuznetsov 2022-05-25 13:59:47 +02:00 • committed by Paolo Bonzini
parent 9411e8b6fa
commit aa6bb5fad5
5 changed files with 19 additions and 0 deletions
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1
target/i386/kvm/hyperv-proto.h
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@ -59,6 +59,7 @@
#define HV_FREQUENCY_MSRS_AVAILABLE (1u << 8)
#define HV_GUEST_CRASH_MSR_AVAILABLE (1u << 10)
#define HV_FEATURE_DEBUG_MSRS_AVAILABLE (1u << 11)
#define HV_EXT_GVA_RANGES_FLUSH_AVAILABLE (1u << 14)
#define HV_STIMER_DIRECT_MODE_AVAILABLE (1u << 19)
/*