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From: KarimAllah Ahmed <karahmed@amazon.de>
To: x86@kernel.org, kvm@vger.kernel.org,
	linux-kernel@vger.kernel.org, "Radim Krčmář" <rkrcmar@redhat.com>,
	"Paolo Bonzini" <pbonzini@redhat.com>
Cc: KarimAllah Ahmed <karahmed@amazon.de>
Subject: [PATCH v6 12/14] KVM/nVMX: Use kvm_vcpu_map for accessing the enlightened VMCS
Date: Thu, 31 Jan 2019 21:24:42 +0100	[thread overview]
Message-ID: <1548966284-28642-13-git-send-email-karahmed@amazon.de> (raw)
In-Reply-To: <1548966284-28642-1-git-send-email-karahmed@amazon.de>

Use kvm_vcpu_map for accessing the enlightened VMCS since using
kvm_vcpu_gpa_to_page() and kmap() will only work for guest memory that has
a "struct page".

Signed-off-by: KarimAllah Ahmed <karahmed@amazon.de>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
v4 -> v5:
- s/enhanced/enlightened
- unmap with dirty flag
---
 arch/x86/kvm/vmx/nested.c | 14 +++++---------
 arch/x86/kvm/vmx/vmx.h    |  2 +-
 2 files changed, 6 insertions(+), 10 deletions(-)

diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
index 3c173b9..60ba582 100644
--- a/arch/x86/kvm/vmx/nested.c
+++ b/arch/x86/kvm/vmx/nested.c
@@ -193,10 +193,8 @@ static inline void nested_release_evmcs(struct kvm_vcpu *vcpu)
 	if (!vmx->nested.hv_evmcs)
 		return;
 
-	kunmap(vmx->nested.hv_evmcs_page);
-	kvm_release_page_dirty(vmx->nested.hv_evmcs_page);
+	kvm_vcpu_unmap(vcpu, &vmx->nested.hv_evmcs_map, true);
 	vmx->nested.hv_evmcs_vmptr = -1ull;
-	vmx->nested.hv_evmcs_page = NULL;
 	vmx->nested.hv_evmcs = NULL;
 }
 
@@ -1769,13 +1767,11 @@ static int nested_vmx_handle_enlightened_vmptrld(struct kvm_vcpu *vcpu,
 
 		nested_release_evmcs(vcpu);
 
-		vmx->nested.hv_evmcs_page = kvm_vcpu_gpa_to_page(
-			vcpu, assist_page.current_nested_vmcs);
-
-		if (unlikely(is_error_page(vmx->nested.hv_evmcs_page)))
+		if (kvm_vcpu_map(vcpu, gpa_to_gfn(assist_page.current_nested_vmcs),
+				 &vmx->nested.hv_evmcs_map))
 			return 0;
 
-		vmx->nested.hv_evmcs = kmap(vmx->nested.hv_evmcs_page);
+		vmx->nested.hv_evmcs = vmx->nested.hv_evmcs_map.hva;
 
 		/*
 		 * Currently, KVM only supports eVMCS version 1
@@ -4278,7 +4274,7 @@ static int handle_vmclear(struct kvm_vcpu *vcpu)
 		return nested_vmx_failValid(vcpu,
 			VMXERR_VMCLEAR_VMXON_POINTER);
 
-	if (vmx->nested.hv_evmcs_page) {
+	if (vmx->nested.hv_evmcs_map.hva) {
 		if (vmptr == vmx->nested.hv_evmcs_vmptr)
 			nested_release_evmcs(vcpu);
 	} else {
diff --git a/arch/x86/kvm/vmx/vmx.h b/arch/x86/kvm/vmx/vmx.h
index bd04725..a130139 100644
--- a/arch/x86/kvm/vmx/vmx.h
+++ b/arch/x86/kvm/vmx/vmx.h
@@ -172,7 +172,7 @@ struct nested_vmx {
 	} smm;
 
 	gpa_t hv_evmcs_vmptr;
-	struct page *hv_evmcs_page;
+	struct kvm_host_map hv_evmcs_map;
 	struct hv_enlightened_vmcs *hv_evmcs;
 };
 
-- 
2.7.4


  parent reply	other threads:[~2019-01-31 20:27 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-31 20:24 [PATCH v6 00/14] KVM/X86: Introduce a new guest mapping interface KarimAllah Ahmed
2019-01-31 20:24 ` [PATCH v6 01/14] X86/nVMX: handle_vmon: Read 4 bytes from guest memory KarimAllah Ahmed
2019-01-31 20:24 ` [PATCH v6 02/14] X86/nVMX: Update the PML table without mapping and unmapping the page KarimAllah Ahmed
2019-01-31 20:24 ` [PATCH v6 03/14] X86/KVM: Handle PFNs outside of kernel reach when touching GPTEs KarimAllah Ahmed
2019-01-31 20:24 ` [PATCH v6 04/14] KVM: Introduce a new guest mapping API KarimAllah Ahmed
2019-01-31 20:24 ` [PATCH v6 05/14] X86/nVMX: handle_vmptrld: Use kvm_vcpu_map when copying VMCS12 from guest memory KarimAllah Ahmed
2019-01-31 20:24 ` [PATCH v6 06/14] KVM/nVMX: Use kvm_vcpu_map when mapping the L1 MSR bitmap KarimAllah Ahmed
2019-01-31 20:24 ` [PATCH v6 07/14] KVM/nVMX: Use kvm_vcpu_map when mapping the virtual APIC page KarimAllah Ahmed
2019-01-31 20:24 ` [PATCH v6 08/14] KVM/nVMX: Use kvm_vcpu_map when mapping the posted interrupt descriptor table KarimAllah Ahmed
2021-05-06 23:06   ` Jim Mattson
2021-05-06 23:27     ` Sean Christopherson
2019-01-31 20:24 ` [PATCH v6 09/14] KVM/X86: Use kvm_vcpu_map in emulator_cmpxchg_emulated KarimAllah Ahmed
2019-01-31 20:24 ` [PATCH v6 10/14] KVM/nSVM: Use the new mapping API for mapping guest memory KarimAllah Ahmed
2019-01-31 20:24 ` [PATCH v6 11/14] KVM/nVMX: Use kvm_vcpu_map for accessing the shadow VMCS KarimAllah Ahmed
2019-01-31 20:24 ` KarimAllah Ahmed [this message]
2019-01-31 20:24 ` [PATCH v6 13/14] KVM/nVMX: Use page_address_valid in a few more locations KarimAllah Ahmed
2019-01-31 20:24 ` [PATCH v6 14/14] kvm, x86: Properly check whether a pfn is an MMIO or not KarimAllah Ahmed
2019-03-18 13:10 ` [PATCH v6 00/14] KVM/X86: Introduce a new guest mapping interface Raslan, KarimAllah
2019-03-18 14:22   ` Konrad Rzeszutek Wilk
2019-03-18 19:16     ` Raslan, KarimAllah
2019-04-29 13:58       ` Konrad Rzeszutek Wilk
2019-04-30 19:31         ` Paolo Bonzini

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