From: Maxim Levitsky <mlevitsk@redhat.com>
To: kvm@vger.kernel.org
Cc: Wanpeng Li <wanpengli@tencent.com>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
Jani Nikula <jani.nikula@linux.intel.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>,
Rodrigo Vivi <rodrigo.vivi@intel.com>,
Zhenyu Wang <zhenyuw@linux.intel.com>,
Joonas Lahtinen <joonas.lahtinen@linux.intel.com>,
Tom Lendacky <thomas.lendacky@amd.com>,
Ingo Molnar <mingo@redhat.com>, David Airlie <airlied@linux.ie>,
Thomas Gleixner <tglx@linutronix.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
x86@kernel.org, intel-gfx@lists.freedesktop.org,
Sean Christopherson <seanjc@google.com>,
Daniel Vetter <daniel@ffwll.ch>, Borislav Petkov <bp@alien8.de>,
Joerg Roedel <joro@8bytes.org>,
linux-kernel@vger.kernel.org, Jim Mattson <jmattson@google.com>,
Zhi Wang <zhi.a.wang@intel.com>,
Brijesh Singh <brijesh.singh@amd.com>,
"H. Peter Anvin" <hpa@zytor.com>,
intel-gvt-dev@lists.freedesktop.org,
dri-devel@lists.freedesktop.org,
Maxim Levitsky <mlevitsk@redhat.com>
Subject: [RFC PATCH v3 10/19] KVM: x86: nSVM: implement AVIC's physid/logid table access helpers
Date: Wed, 27 Apr 2022 23:03:05 +0300 [thread overview]
Message-ID: <20220427200314.276673-11-mlevitsk@redhat.com> (raw)
In-Reply-To: <20220427200314.276673-1-mlevitsk@redhat.com>
This implements a few helpers that help manipulate the AVIC's
physical and logical id table entries.
Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
---
arch/x86/kvm/svm/svm.h | 45 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 45 insertions(+)
diff --git a/arch/x86/kvm/svm/svm.h b/arch/x86/kvm/svm/svm.h
index 6fcb164a6ee4a..dfca4c06e2071 100644
--- a/arch/x86/kvm/svm/svm.h
+++ b/arch/x86/kvm/svm/svm.h
@@ -628,6 +628,51 @@ void avic_vcpu_unblocking(struct kvm_vcpu *vcpu);
void avic_ring_doorbell(struct kvm_vcpu *vcpu);
unsigned long avic_vcpu_get_apicv_inhibit_reasons(struct kvm_vcpu *vcpu);
+#define INVALID_BACKING_PAGE (~(u64)0)
+
+static inline u64 physid_entry_get_backing_table(u64 entry)
+{
+ if (!(entry & AVIC_PHYSICAL_ID_ENTRY_VALID_MASK))
+ return INVALID_BACKING_PAGE;
+ return entry & AVIC_PHYSICAL_ID_ENTRY_BACKING_PAGE_MASK;
+}
+
+static inline int physid_entry_get_apicid(u64 entry)
+{
+ if (!(entry & AVIC_PHYSICAL_ID_ENTRY_VALID_MASK))
+ return -1;
+ if (!(entry & AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK))
+ return -1;
+
+ return entry & AVIC_PHYSICAL_ID_ENTRY_HOST_PHYSICAL_ID_MASK;
+}
+
+static inline int logid_get_physid(u64 entry)
+{
+ if (!(entry & AVIC_LOGICAL_ID_ENTRY_VALID_BIT))
+ return -1;
+ return entry & AVIC_LOGICAL_ID_ENTRY_GUEST_PHYSICAL_ID_MASK;
+}
+
+static inline void physid_entry_set_backing_table(u64 *entry, u64 value)
+{
+ *entry &= ~AVIC_PHYSICAL_ID_ENTRY_BACKING_PAGE_MASK;
+ *entry |= (AVIC_PHYSICAL_ID_ENTRY_VALID_MASK | value);
+}
+
+static inline void physid_entry_set_apicid(u64 *entry, int value)
+{
+ WARN_ON(!(*entry & AVIC_PHYSICAL_ID_ENTRY_VALID_MASK));
+
+ *entry &= ~AVIC_PHYSICAL_ID_ENTRY_HOST_PHYSICAL_ID_MASK;
+
+ if (value == -1)
+ *entry &= ~(AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK);
+ else
+ *entry |= (AVIC_PHYSICAL_ID_ENTRY_IS_RUNNING_MASK | value);
+}
+
+
/* sev.c */
#define GHCB_VERSION_MAX 1ULL
--
2.26.3
next prev parent reply other threads:[~2022-04-27 20:05 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-27 20:02 [RFC PATCH v3 00/19] RFC: nested AVIC Maxim Levitsky
2022-04-27 20:02 ` [RFC PATCH v3 01/19] KVM: x86: document AVIC/APICv inhibit reasons Maxim Levitsky
2022-05-18 15:56 ` Sean Christopherson
2022-05-18 17:13 ` Maxim Levitsky
2022-04-27 20:02 ` [RFC PATCH v3 02/19] KVM: x86: inhibit APICv/AVIC when the guest and/or host changes apic id/base from the defaults Maxim Levitsky
2022-05-18 8:28 ` Chao Gao
2022-05-18 9:50 ` Maxim Levitsky
2022-05-18 11:51 ` Chao Gao
2022-05-18 12:36 ` Maxim Levitsky
2022-05-18 15:39 ` Sean Christopherson
2022-05-18 17:15 ` Maxim Levitsky
2022-05-19 16:06 ` Sean Christopherson
2022-05-22 9:03 ` Maxim Levitsky
2022-05-22 14:47 ` Jim Mattson
2022-05-23 6:50 ` Maxim Levitsky
2022-05-23 17:22 ` Jim Mattson
2022-05-23 17:31 ` Sean Christopherson
2022-06-23 9:44 ` Maxim Levitsky
2022-04-27 20:02 ` [RFC PATCH v3 03/19] KVM: x86: SVM: remove avic's broken code that updated APIC ID Maxim Levitsky
2022-05-19 16:10 ` Sean Christopherson
2022-05-22 9:01 ` Maxim Levitsky
2022-05-23 17:19 ` Sean Christopherson
2022-04-27 20:02 ` [RFC PATCH v3 04/19] KVM: x86: mmu: allow to enable write tracking externally Maxim Levitsky
2022-05-19 16:27 ` Sean Christopherson
2022-05-22 10:21 ` Maxim Levitsky
2022-05-19 16:37 ` Sean Christopherson
2022-05-22 10:22 ` Maxim Levitsky
2022-07-20 14:42 ` Maxim Levitsky
2022-07-25 16:08 ` Sean Christopherson
2022-07-28 7:46 ` Maxim Levitsky
2022-08-01 15:53 ` Maxim Levitsky
2022-08-01 17:20 ` Sean Christopherson
2022-08-08 13:13 ` Nested AVIC design (was:Re: [RFC PATCH v3 04/19] KVM: x86: mmu: allow to enable write tracking externally) Maxim Levitsky
2022-09-29 22:38 ` Sean Christopherson
2022-10-03 7:27 ` Maxim Levitsky
2022-11-10 0:47 ` Sean Christopherson
2022-04-27 20:03 ` [RFC PATCH v3 05/19] x86: KVMGT: use kvm_page_track_write_tracking_enable Maxim Levitsky
2022-05-19 16:38 ` Sean Christopherson
2022-04-27 20:03 ` [RFC PATCH v3 06/19] KVM: x86: mmu: add gfn_in_memslot helper Maxim Levitsky
2022-05-19 16:43 ` Sean Christopherson
2022-05-22 10:22 ` Maxim Levitsky
2022-05-22 12:12 ` Maxim Levitsky
2022-04-27 20:03 ` [RFC PATCH v3 07/19] KVM: x86: mmu: tweak fast path for emulation of access to nested NPT pages Maxim Levitsky
2022-04-27 20:03 ` [RFC PATCH v3 08/19] KVM: x86: SVM: move avic state to separate struct Maxim Levitsky
2022-04-27 20:03 ` [RFC PATCH v3 09/19] KVM: x86: nSVM: add nested AVIC tracepoints Maxim Levitsky
2022-04-27 20:03 ` Maxim Levitsky [this message]
2022-04-27 20:03 ` [RFC PATCH v3 11/19] KVM: x86: nSVM: implement shadowing of AVIC's physical id table Maxim Levitsky
2022-04-27 20:03 ` [RFC PATCH v3 12/19] KVM: x86: nSVM: make nested AVIC physid write tracking be aware of the host scheduling Maxim Levitsky
2022-04-27 20:03 ` [RFC PATCH v3 13/19] KVM: x86: nSVM: wire nested AVIC to nested guest entry/exit Maxim Levitsky
2022-04-27 20:03 ` [RFC PATCH v3 14/19] KVM: x86: rename .set_apic_access_page_addr to reload_apic_access_page Maxim Levitsky
2022-05-19 16:55 ` Sean Christopherson
2022-05-22 10:22 ` Maxim Levitsky
2022-04-27 20:03 ` [RFC PATCH v3 15/19] KVM: x86: nSVM: add code to reload AVIC physid table when it is invalidated Maxim Levitsky
2022-04-27 20:03 ` [RFC PATCH v3 16/19] KVM: x86: nSVM: implement support for nested AVIC vmexits Maxim Levitsky
2022-04-27 20:03 ` [RFC PATCH v3 17/19] KVM: x86: nSVM: implement nested AVIC doorbell emulation Maxim Levitsky
2022-04-27 20:03 ` [RFC PATCH v3 18/19] KVM: x86: SVM/nSVM: add optional non strict AVIC doorbell mode Maxim Levitsky
2022-04-27 20:03 ` [RFC PATCH v3 19/19] KVM: x86: nSVM: expose the nested AVIC to the guest Maxim Levitsky
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