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bh=2dqivw9mvMBBu11fC6hqiOvz7iZ/NUDFCtzB2JrxB5Q=; b=VAfhyW3hMBfiEbkYegL1IDGrmAP/CR2GsL61QfSeuT8LPqrJaguOUuC+gLdt9lEq6Y5YJK olpZiS7mQyWrf+OrjW2Ly8HWx6wPvVJbqqkMfV4EY0J53e0AsDwH7qFwnZjFn26dqWStjo caUu8EYlHAjG2zyxcDy1jf54R7JL62k= X-MC-Unique: dqi1terFMLyaJhi7GTP8nA-1 From: Vitaly Kuznetsov To: qemu-devel@nongnu.org, Paolo Bonzini Cc: Marcelo Tosatti Subject: [PATCH v4 4/6] i386: Hyper-V Support extended GVA ranges for TLB flush hypercalls Date: Wed, 25 May 2022 13:59:47 +0200 Message-Id: <20220525115949.1294004-5-vkuznets@redhat.com> In-Reply-To: <20220525115949.1294004-1-vkuznets@redhat.com> References: <20220525115949.1294004-1-vkuznets@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 2.84 on 10.11.54.1 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.133.124; envelope-from=vkuznets@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1653480724864100001 Content-Type: text/plain; charset="utf-8" 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 --- docs/hyperv.txt | 7 +++++++ target/i386/cpu.c | 2 ++ target/i386/cpu.h | 1 + target/i386/kvm/hyperv-proto.h | 1 + target/i386/kvm/kvm.c | 8 ++++++++ 5 files changed, 19 insertions(+) diff --git a/docs/hyperv.txt b/docs/hyperv.txt index af1b10c0b3d1..4b132b1c941a 100644 --- a/docs/hyperv.txt +++ b/docs/hyperv.txt @@ -255,6 +255,13 @@ Hyper-V specification allows to pass parameters for ce= rtain hypercalls using XMM registers ("XMM Fast Hypercall Input"). When the feature is in use, it all= ows for faster hypercalls processing as KVM can avoid reading guest's memory. =20 +3.24. hv-tlbflush-ext +=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D +Allow for extended GVA ranges to be passed to Hyper-V TLB flush hypercalls +(HvFlushVirtualAddressList/HvFlushVirtualAddressListEx). + +Requires: hv-tlbflush + 4. Supplementary features =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D =20 diff --git a/target/i386/cpu.c b/target/i386/cpu.c index cb86c11f71d4..a5331e6140fc 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -6964,6 +6964,8 @@ static Property x86_cpu_properties[] =3D { HYPERV_FEAT_MSR_BITMAP, 0), DEFINE_PROP_BIT64("hv-xmm-input", X86CPU, hyperv_features, HYPERV_FEAT_XMM_INPUT, 0), + DEFINE_PROP_BIT64("hv-tlbflush-ext", X86CPU, hyperv_features, + HYPERV_FEAT_TLBFLUSH_EXT, 0), DEFINE_PROP_ON_OFF_AUTO("hv-no-nonarch-coresharing", X86CPU, hyperv_no_nonarch_cs, ON_OFF_AUTO_OFF), DEFINE_PROP_BIT64("hv-syndbg", X86CPU, hyperv_features, diff --git a/target/i386/cpu.h b/target/i386/cpu.h index 37e95535843b..5ff48257e513 100644 --- a/target/i386/cpu.h +++ b/target/i386/cpu.h @@ -1108,6 +1108,7 @@ uint64_t x86_cpu_get_supported_feature_word(FeatureWo= rd w, #define HYPERV_FEAT_SYNDBG 16 #define HYPERV_FEAT_MSR_BITMAP 17 #define HYPERV_FEAT_XMM_INPUT 18 +#define HYPERV_FEAT_TLBFLUSH_EXT 19 =20 #ifndef HYPERV_SPINLOCK_NEVER_NOTIFY #define HYPERV_SPINLOCK_NEVER_NOTIFY 0xFFFFFFFF diff --git a/target/i386/kvm/hyperv-proto.h b/target/i386/kvm/hyperv-proto.h index f5f16474fa25..c7854ed6d306 100644 --- a/target/i386/kvm/hyperv-proto.h +++ b/target/i386/kvm/hyperv-proto.h @@ -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) =20 /* diff --git a/target/i386/kvm/kvm.c b/target/i386/kvm/kvm.c index 96d6c50ad5d9..7bd1b4396e8e 100644 --- a/target/i386/kvm/kvm.c +++ b/target/i386/kvm/kvm.c @@ -987,6 +987,14 @@ static struct { .bits =3D HV_HYPERCALL_XMM_INPUT_AVAILABLE} } }, + [HYPERV_FEAT_TLBFLUSH_EXT] =3D { + .desc =3D "Extended gva ranges for TLB flush hypercalls (hv-tlbflu= sh-ext)", + .flags =3D { + {.func =3D HV_CPUID_FEATURES, .reg =3D R_EDX, + .bits =3D HV_EXT_GVA_RANGES_FLUSH_AVAILABLE} + }, + .dependencies =3D BIT(HYPERV_FEAT_TLBFLUSH) + }, }; =20 static struct kvm_cpuid2 *try_get_hv_cpuid(CPUState *cs, int max, --=20 2.35.3