All of lore.kernel.org
 help / color / mirror / Atom feed
From: Sean Christopherson <sean.j.christopherson@intel.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: Sean Christopherson <sean.j.christopherson@intel.com>,
	Vitaly Kuznetsov <vkuznets@redhat.com>,
	Wanpeng Li <wanpengli@tencent.com>,
	Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>,
	kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
	Ben Gardon <bgardon@google.com>,
	Junaid Shahid <junaids@google.com>,
	Liran Alon <liran.alon@oracle.com>,
	Boris Ostrovsky <boris.ostrovsky@oracle.com>,
	John Haxby <john.haxby@oracle.com>,
	Miaohe Lin <linmiaohe@huawei.com>,
	Tom Lendacky <thomas.lendacky@amd.com>
Subject: [PATCH v2 05/32] KVM: x86: Export kvm_propagate_fault() (as kvm_inject_emulated_page_fault)
Date: Mon, 16 Mar 2020 21:52:11 -0700	[thread overview]
Message-ID: <20200317045238.30434-6-sean.j.christopherson@intel.com> (raw)
In-Reply-To: <20200317045238.30434-1-sean.j.christopherson@intel.com>

Export the page fault propagation helper so that VMX can use it to
correctly emulate TLB invalidation on page faults in an upcoming patch.

In the (hopefully) not-too-distant future, SGX virtualization will also
want access to the helper for injecting page faults to the correct level
(L1 vs. L2) when emulating ENCLS instructions.

Rename the function to kvm_inject_emulated_page_fault() to clarify that
it is (a) injecting a fault and (b) only for page faults.  WARN if it's
invoked with an exception other than PF_VECTOR.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
---
 arch/x86/include/asm/kvm_host.h | 2 ++
 arch/x86/kvm/x86.c              | 8 ++++++--
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 9a183e9d4cb1..328b1765ff76 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -1447,6 +1447,8 @@ void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code);
 void kvm_requeue_exception(struct kvm_vcpu *vcpu, unsigned nr);
 void kvm_requeue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code);
 void kvm_inject_page_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault);
+bool kvm_inject_emulated_page_fault(struct kvm_vcpu *vcpu,
+				    struct x86_exception *fault);
 int kvm_read_guest_page_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu,
 			    gfn_t gfn, void *data, int offset, int len,
 			    u32 access);
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index e54c6ad628a8..64ed6e6e2b56 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -611,8 +611,11 @@ void kvm_inject_page_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault)
 }
 EXPORT_SYMBOL_GPL(kvm_inject_page_fault);
 
-static bool kvm_propagate_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault)
+bool kvm_inject_emulated_page_fault(struct kvm_vcpu *vcpu,
+				    struct x86_exception *fault)
 {
+	WARN_ON_ONCE(fault->vector != PF_VECTOR);
+
 	if (mmu_is_nested(vcpu) && !fault->nested_page_fault)
 		vcpu->arch.nested_mmu.inject_page_fault(vcpu, fault);
 	else
@@ -620,6 +623,7 @@ static bool kvm_propagate_fault(struct kvm_vcpu *vcpu, struct x86_exception *fau
 
 	return fault->nested_page_fault;
 }
+EXPORT_SYMBOL_GPL(kvm_inject_emulated_page_fault);
 
 void kvm_inject_nmi(struct kvm_vcpu *vcpu)
 {
@@ -6373,7 +6377,7 @@ static bool inject_emulated_exception(struct kvm_vcpu *vcpu)
 {
 	struct x86_emulate_ctxt *ctxt = vcpu->arch.emulate_ctxt;
 	if (ctxt->exception.vector == PF_VECTOR)
-		return kvm_propagate_fault(vcpu, &ctxt->exception);
+		return kvm_inject_emulated_page_fault(vcpu, &ctxt->exception);
 
 	if (ctxt->exception.error_code_valid)
 		kvm_queue_exception_e(vcpu, ctxt->exception.vector,
-- 
2.24.1


  parent reply	other threads:[~2020-03-17  4:53 UTC|newest]

Thread overview: 45+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-17  4:52 [PATCH v2 00/32] KVM: x86: TLB flushing fixes and enhancements Sean Christopherson
2020-03-17  4:52 ` [PATCH v2 01/32] KVM: VMX: Flush all EPTP/VPID contexts on remote TLB flush Sean Christopherson
2020-03-17  4:52 ` [PATCH v2 02/32] KVM: nVMX: Validate the EPTP when emulating INVEPT(EXTENT_CONTEXT) Sean Christopherson
2020-03-17  4:52 ` [PATCH v2 03/32] KVM: nVMX: Invalidate all EPTP contexts when emulating INVEPT for L1 Sean Christopherson
2020-03-17  4:52 ` [PATCH v2 04/32] KVM: nVMX: Invalidate all L2 roots when emulating INVVPID without EPT Sean Christopherson
2020-03-20  4:11   ` Sean Christopherson
2020-03-17  4:52 ` Sean Christopherson [this message]
2020-03-17  4:52 ` [PATCH v2 06/32] KVM: x86: Consolidate logic for injecting page faults to L1 Sean Christopherson
2020-03-17  4:52 ` [PATCH v2 07/32] KVM: x86: Sync SPTEs when injecting page/EPT fault into L1 Sean Christopherson
2020-03-17  4:52 ` [PATCH v2 08/32] KVM: VMX: Skip global INVVPID fallback if vpid==0 in vpid_sync_context() Sean Christopherson
2020-03-17  4:52 ` [PATCH v2 09/32] KVM: VMX: Use vpid_sync_context() directly when possible Sean Christopherson
2020-03-17  4:52 ` [PATCH v2 10/32] KVM: VMX: Move vpid_sync_vcpu_addr() down a few lines Sean Christopherson
2020-03-17  4:52 ` [PATCH v2 11/32] KVM: VMX: Handle INVVPID fallback logic in vpid_sync_vcpu_addr() Sean Christopherson
2020-03-17  4:52 ` [PATCH v2 12/32] KVM: VMX: Drop redundant capability checks in low level INVVPID helpers Sean Christopherson
2020-03-17  4:52 ` [PATCH v2 13/32] KVM: nVMX: Use vpid_sync_vcpu_addr() to emulate INVVPID with address Sean Christopherson
2020-03-17  4:52 ` [PATCH v2 14/32] KVM: x86: Move "flush guest's TLB" logic to separate kvm_x86_ops hook Sean Christopherson
2020-03-17  4:52 ` [PATCH v2 15/32] KVM: VMX: Clean up vmx_flush_tlb_gva() Sean Christopherson
2020-03-17  4:52 ` [PATCH v2 16/32] KVM: x86: Drop @invalidate_gpa param from kvm_x86_ops' tlb_flush() Sean Christopherson
2020-03-17  4:52 ` [PATCH v2 17/32] KVM: SVM: Wire up ->tlb_flush_guest() directly to svm_flush_tlb() Sean Christopherson
2020-03-17  4:52 ` [PATCH v2 18/32] KVM: VMX: Move vmx_flush_tlb() to vmx.c Sean Christopherson
2020-03-17  4:52 ` [PATCH v2 19/32] KVM: nVMX: Move nested_get_vpid02() to vmx/nested.h Sean Christopherson
2020-03-17  4:52 ` [PATCH v2 20/32] KVM: VMX: Introduce vmx_flush_tlb_current() Sean Christopherson
2020-03-17  4:52 ` [PATCH v2 21/32] KVM: SVM: Document the ASID logic in svm_flush_tlb() Sean Christopherson
2020-03-17  4:52 ` [PATCH v2 22/32] KVM: x86: Rename ->tlb_flush() to ->tlb_flush_all() Sean Christopherson
2020-03-17  4:52 ` [PATCH v2 23/32] KVM: nVMX: Add helper to handle TLB flushes on nested VM-Enter/VM-Exit Sean Christopherson
2020-03-17 17:17   ` Paolo Bonzini
2020-03-17 18:18     ` Sean Christopherson
2020-03-18 10:45       ` Paolo Bonzini
2020-03-18 16:09         ` Sean Christopherson
2020-03-17  4:52 ` [PATCH v2 24/32] KVM: x86: Introduce KVM_REQ_TLB_FLUSH_CURRENT to flush current ASID Sean Christopherson
2020-03-17  4:52 ` [PATCH v2 25/32] KVM: x86/mmu: Use KVM_REQ_TLB_FLUSH_CURRENT for MMU specific flushes Sean Christopherson
2020-03-17  4:52 ` [PATCH v2 26/32] KVM: nVMX: Selectively use TLB_FLUSH_CURRENT for nested VM-Enter/VM-Exit Sean Christopherson
2020-03-17  4:52 ` [PATCH v2 27/32] KVM: nVMX: Reload APIC access page on nested VM-Exit only if necessary Sean Christopherson
2020-03-17  4:52 ` [PATCH v2 28/32] KVM: VMX: Retrieve APIC access page HPA only when necessary Sean Christopherson
2020-03-17  4:52 ` [PATCH v2 29/32] KVM: VMX: Don't reload APIC access page if its control is disabled Sean Christopherson
2020-03-17  4:52 ` [PATCH v2 30/32] KVM: x86/mmu: Add module param to force TLB flush on root reuse Sean Christopherson
2020-03-17  4:52 ` [PATCH v2 31/32] KVM: nVMX: Don't flush TLB on nested VM transition with EPT enabled Sean Christopherson
2020-03-17 17:18   ` Paolo Bonzini
2020-03-17 18:22     ` Sean Christopherson
2020-03-18 10:36       ` Paolo Bonzini
2020-03-18 17:02         ` Sean Christopherson
2020-03-18 17:11           ` Paolo Bonzini
2020-03-18 17:26             ` Sean Christopherson
2020-03-18 17:38               ` Paolo Bonzini
2020-03-17  4:52 ` [PATCH v2 32/32] KVM: nVMX: Free only the affected contexts when emulating INVEPT Sean Christopherson

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=20200317045238.30434-6-sean.j.christopherson@intel.com \
    --to=sean.j.christopherson@intel.com \
    --cc=bgardon@google.com \
    --cc=boris.ostrovsky@oracle.com \
    --cc=jmattson@google.com \
    --cc=john.haxby@oracle.com \
    --cc=joro@8bytes.org \
    --cc=junaids@google.com \
    --cc=kvm@vger.kernel.org \
    --cc=linmiaohe@huawei.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=liran.alon@oracle.com \
    --cc=pbonzini@redhat.com \
    --cc=thomas.lendacky@amd.com \
    --cc=vkuznets@redhat.com \
    --cc=wanpengli@tencent.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.