linux-hyperv.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Vitaly Kuznetsov <vkuznets@redhat.com>
To: kvm@vger.kernel.org, Paolo Bonzini <pbonzini@redhat.com>
Cc: Sean Christopherson <seanjc@google.com>,
	Wanpeng Li <wanpengli@tencent.com>,
	Jim Mattson <jmattson@google.com>,
	Michael Kelley <mikelley@microsoft.com>,
	Siddharth Chandrasekaran <sidcha@amazon.de>,
	Yuan Yao <yuan.yao@linux.intel.com>,
	Maxim Levitsky <mlevitsk@redhat.com>,
	linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH v10 06/39] KVM: x86: hyper-v: Expose support for extended gva ranges for flush hypercalls
Date: Wed, 21 Sep 2022 17:24:03 +0200	[thread overview]
Message-ID: <20220921152436.3673454-7-vkuznets@redhat.com> (raw)
In-Reply-To: <20220921152436.3673454-1-vkuznets@redhat.com>

Extended GVA ranges support bit seems to indicate whether lower 12
bits of GVA can be used to specify up to 4095 additional consequent
GVAs to flush. This is somewhat described in TLFS.

Previously, KVM was handling HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST{,EX}
requests by flushing the whole VPID so technically, extended GVA
ranges were already supported. As such requests are handled more
gently now, advertizing support for extended ranges starts making
sense to reduce the size of TLB flush requests.

Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
---
 arch/x86/include/asm/hyperv-tlfs.h | 2 ++
 arch/x86/kvm/hyperv.c              | 1 +
 2 files changed, 3 insertions(+)

diff --git a/arch/x86/include/asm/hyperv-tlfs.h b/arch/x86/include/asm/hyperv-tlfs.h
index 3089ec352743..d0fd106e51e6 100644
--- a/arch/x86/include/asm/hyperv-tlfs.h
+++ b/arch/x86/include/asm/hyperv-tlfs.h
@@ -61,6 +61,8 @@
 #define HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE		BIT(10)
 /* Support for debug MSRs available */
 #define HV_FEATURE_DEBUG_MSRS_AVAILABLE			BIT(11)
+/* Support for extended gva ranges for flush hypercalls available */
+#define HV_FEATURE_EXT_GVA_RANGES_FLUSH			BIT(14)
 /*
  * Support for returning hypercall output block via XMM
  * registers is available
diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c
index d5a329cebcc6..aced2b3fe56b 100644
--- a/arch/x86/kvm/hyperv.c
+++ b/arch/x86/kvm/hyperv.c
@@ -2636,6 +2636,7 @@ int kvm_get_hv_cpuid(struct kvm_vcpu *vcpu, struct kvm_cpuid2 *cpuid,
 			ent->ebx |= HV_DEBUGGING;
 			ent->edx |= HV_X64_GUEST_DEBUGGING_AVAILABLE;
 			ent->edx |= HV_FEATURE_DEBUG_MSRS_AVAILABLE;
+			ent->edx |= HV_FEATURE_EXT_GVA_RANGES_FLUSH;
 
 			/*
 			 * Direct Synthetic timers only make sense with in-kernel
-- 
2.37.3


  parent reply	other threads:[~2022-09-21 15:25 UTC|newest]

Thread overview: 64+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-09-21 15:23 [PATCH v10 00/39] KVM: x86: hyper-v: Fine-grained TLB flush + L2 TLB flush features Vitaly Kuznetsov
2022-09-21 15:23 ` [PATCH v10 01/39] KVM: x86: Rename 'enable_direct_tlbflush' to 'enable_l2_tlb_flush' Vitaly Kuznetsov
2022-09-21 15:23 ` [PATCH v10 02/39] KVM: x86: hyper-v: Resurrect dedicated KVM_REQ_HV_TLB_FLUSH flag Vitaly Kuznetsov
2022-09-21 16:23   ` Sean Christopherson
2022-09-21 16:45     ` Sean Christopherson
2022-09-22  9:35       ` Vitaly Kuznetsov
2022-09-22  9:31     ` Vitaly Kuznetsov
2022-09-22 15:23       ` Sean Christopherson
2022-09-22 15:37         ` Vitaly Kuznetsov
2022-09-21 15:24 ` [PATCH v10 03/39] KVM: x86: hyper-v: Introduce TLB flush fifo Vitaly Kuznetsov
2022-09-21 16:56   ` Sean Christopherson
2022-09-22  9:42     ` Vitaly Kuznetsov
2022-09-21 15:24 ` [PATCH v10 04/39] KVM: x86: hyper-v: Add helper to read hypercall data for array Vitaly Kuznetsov
2022-09-21 15:24 ` [PATCH v10 05/39] KVM: x86: hyper-v: Handle HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST{,EX} calls gently Vitaly Kuznetsov
2022-09-21 17:00   ` Sean Christopherson
2022-09-21 15:24 ` Vitaly Kuznetsov [this message]
2022-09-21 15:24 ` [PATCH v10 07/39] KVM: x86: Prepare kvm_hv_flush_tlb() to handle L2's GPAs Vitaly Kuznetsov
2022-09-21 15:24 ` [PATCH v10 08/39] x86/hyperv: Introduce HV_MAX_SPARSE_VCPU_BANKS/HV_VCPUS_PER_SPARSE_BANK constants Vitaly Kuznetsov
2022-09-21 15:24 ` [PATCH v10 09/39] KVM: x86: hyper-v: Use HV_MAX_SPARSE_VCPU_BANKS/HV_VCPUS_PER_SPARSE_BANK instead of raw '64' Vitaly Kuznetsov
2022-09-21 15:24 ` [PATCH v10 10/39] KVM: x86: hyper-v: Don't use sparse_set_to_vcpu_mask() in kvm_hv_send_ipi() Vitaly Kuznetsov
2022-09-21 20:54   ` Sean Christopherson
2022-09-21 15:24 ` [PATCH v10 11/39] KVM: x86: hyper-v: Create a separate fifo for L2 TLB flush Vitaly Kuznetsov
2022-09-21 15:24 ` [PATCH v10 12/39] KVM: x86: hyper-v: Use preallocated buffer in 'struct kvm_vcpu_hv' instead of on-stack 'sparse_banks' Vitaly Kuznetsov
2022-09-21 15:24 ` [PATCH v10 13/39] KVM: nVMX: Keep track of hv_vm_id/hv_vp_id when eVMCS is in use Vitaly Kuznetsov
2022-09-21 15:24 ` [PATCH v10 14/39] KVM: nSVM: Keep track of Hyper-V hv_vm_id/hv_vp_id Vitaly Kuznetsov
2022-09-21 21:16   ` Sean Christopherson
2022-09-22  9:51     ` Vitaly Kuznetsov
2022-09-22 19:52       ` Sean Christopherson
2022-09-21 15:24 ` [PATCH v10 15/39] KVM: x86: Introduce .hv_inject_synthetic_vmexit_post_tlb_flush() nested hook Vitaly Kuznetsov
2022-09-21 15:24 ` [PATCH v10 16/39] KVM: x86: hyper-v: Introduce kvm_hv_is_tlb_flush_hcall() Vitaly Kuznetsov
2022-09-21 15:24 ` [PATCH v10 17/39] KVM: x86: hyper-v: L2 TLB flush Vitaly Kuznetsov
2022-09-21 15:24 ` [PATCH v10 18/39] KVM: x86: hyper-v: Introduce fast guest_hv_cpuid_has_l2_tlb_flush() check Vitaly Kuznetsov
2022-09-21 21:19   ` Sean Christopherson
2022-09-21 15:24 ` [PATCH v10 19/39] KVM: nVMX: hyper-v: Cache VP assist page in 'struct kvm_vcpu_hv' Vitaly Kuznetsov
2022-09-21 15:24 ` [PATCH v10 20/39] KVM: nVMX: hyper-v: Enable L2 TLB flush Vitaly Kuznetsov
2022-09-21 21:24   ` Sean Christopherson
2022-09-22 16:05   ` Sean Christopherson
2022-09-21 15:24 ` [PATCH v10 21/39] KVM: nSVM: " Vitaly Kuznetsov
2022-09-21 21:31   ` Sean Christopherson
2022-09-21 15:24 ` [PATCH v10 22/39] KVM: x86: Expose Hyper-V L2 TLB flush feature Vitaly Kuznetsov
2022-09-21 15:24 ` [PATCH v10 23/39] KVM: selftests: Better XMM read/write helpers Vitaly Kuznetsov
2022-09-21 15:24 ` [PATCH v10 24/39] KVM: selftests: Move HYPERV_LINUX_OS_ID definition to a common header Vitaly Kuznetsov
2022-09-21 15:24 ` [PATCH v10 25/39] KVM: selftests: Move the function doing Hyper-V hypercall " Vitaly Kuznetsov
2022-09-21 21:51   ` Sean Christopherson
2022-09-21 15:24 ` [PATCH v10 26/39] KVM: selftests: Hyper-V PV IPI selftest Vitaly Kuznetsov
2022-09-21 15:24 ` [PATCH v10 27/39] KVM: selftests: Fill in vm->vpages_mapped bitmap in virt_map() too Vitaly Kuznetsov
2022-09-21 15:24 ` [PATCH v10 28/39] KVM: selftests: Export vm_vaddr_unused_gap() to make it possible to request unmapped ranges Vitaly Kuznetsov
2022-09-21 15:24 ` [PATCH v10 29/39] KVM: selftests: Export _vm_get_page_table_entry() Vitaly Kuznetsov
2022-09-21 22:13   ` Sean Christopherson
2022-09-21 15:24 ` [PATCH v10 30/39] KVM: selftests: Hyper-V PV TLB flush selftest Vitaly Kuznetsov
2022-09-21 22:52   ` Sean Christopherson
2022-10-03 13:01     ` Vitaly Kuznetsov
2022-10-03 15:47       ` Sean Christopherson
2022-10-03 16:00         ` Sean Christopherson
2022-09-21 15:24 ` [PATCH v10 31/39] KVM: selftests: Sync 'struct hv_enlightened_vmcs' definition with hyperv-tlfs.h Vitaly Kuznetsov
2022-09-21 15:24 ` [PATCH v10 32/39] KVM: selftests: Sync 'struct hv_vp_assist_page' " Vitaly Kuznetsov
2022-09-21 15:24 ` [PATCH v10 33/39] KVM: selftests: Move Hyper-V VP assist page enablement out of evmcs.h Vitaly Kuznetsov
2022-09-21 15:24 ` [PATCH v10 34/39] KVM: selftests: Split off load_evmcs() from load_vmcs() Vitaly Kuznetsov
2022-09-21 15:24 ` [PATCH v10 35/39] KVM: selftests: Create a vendor independent helper to allocate Hyper-V specific test pages Vitaly Kuznetsov
2022-09-21 22:59   ` Sean Christopherson
2022-09-21 15:24 ` [PATCH v10 36/39] KVM: selftests: Allocate Hyper-V partition assist page Vitaly Kuznetsov
2022-09-21 15:24 ` [PATCH v10 37/39] KVM: selftests: evmcs_test: Introduce L2 TLB flush test Vitaly Kuznetsov
2022-09-21 15:24 ` [PATCH v10 38/39] KVM: selftests: hyperv_svm_test: " Vitaly Kuznetsov
2022-09-21 15:24 ` [PATCH v10 39/39] KVM: selftests: Rename 'evmcs_test' to 'hyperv_evmcs' Vitaly Kuznetsov

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20220921152436.3673454-7-vkuznets@redhat.com \
    --to=vkuznets@redhat.com \
    --cc=jmattson@google.com \
    --cc=kvm@vger.kernel.org \
    --cc=linux-hyperv@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mikelley@microsoft.com \
    --cc=mlevitsk@redhat.com \
    --cc=pbonzini@redhat.com \
    --cc=seanjc@google.com \
    --cc=sidcha@amazon.de \
    --cc=wanpengli@tencent.com \
    --cc=yuan.yao@linux.intel.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).