linux-kernel - [V3 PATCH 5/8] KVM: selftests: Enable pagetable mapping for SEV VMs

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Date:   Fri, 23 Dec 2022 00:13:49 +0000
From:   Vishal Annapurve <vannapurve@...gle.com>
To:     x86@...nel.org, kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-kselftest@...r.kernel.org
Cc:     pbonzini@...hat.com, vkuznets@...hat.com, wanpengli@...cent.com,
        jmattson@...gle.com, joro@...tes.org, tglx@...utronix.de,
        mingo@...hat.com, bp@...en8.de, dave.hansen@...ux.intel.com,
        hpa@...or.com, shuah@...nel.org, yang.zhong@...el.com,
        drjones@...hat.com, ricarkol@...gle.com, aaronlewis@...gle.com,
        wei.w.wang@...el.com, kirill.shutemov@...ux.intel.com,
        corbet@....net, hughd@...gle.com, jlayton@...nel.org,
        bfields@...ldses.org, akpm@...ux-foundation.org,
        chao.p.peng@...ux.intel.com, yu.c.zhang@...ux.intel.com,
        jun.nakajima@...el.com, dave.hansen@...el.com,
        michael.roth@....com, qperret@...gle.com, steven.price@....com,
        ak@...ux.intel.com, david@...hat.com, luto@...nel.org,
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        pgonda@...gle.com, nikunj@....com, seanjc@...gle.com,
        diviness@...gle.com, maz@...nel.org, dmatlack@...gle.com,
        axelrasmussen@...gle.com, maciej.szmigiero@...cle.com,
        mizhang@...gle.com, bgardon@...gle.com, ackerleytng@...gle.com,
        Vishal Annapurve <vannapurve@...gle.com>
Subject: [V3 PATCH 5/8] KVM: selftests: Enable pagetable mapping for SEV VMs

Enable pagetable tracking and mapping for SEV VMs to allow guest code to
execute guest_map_region_shared/private APIs.

Signed-off-by: Vishal Annapurve <vannapurve@...gle.com>
---
 tools/testing/selftests/kvm/lib/x86_64/sev.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tools/testing/selftests/kvm/lib/x86_64/sev.c b/tools/testing/selftests/kvm/lib/x86_64/sev.c
index 96d3dbc2ba74..0dfffdc224d6 100644
--- a/tools/testing/selftests/kvm/lib/x86_64/sev.c
+++ b/tools/testing/selftests/kvm/lib/x86_64/sev.c
@@ -215,6 +215,8 @@ static void sev_vm_measure(struct kvm_vm *vm)
 	pr_debug("\n");
 }
 
+#define GUEST_PGT_MIN_VADDR     0x10000
+
 struct kvm_vm *sev_vm_init_with_one_vcpu(uint32_t policy, void *guest_code,
 					   struct kvm_vcpu **cpu)
 {
@@ -224,6 +226,7 @@ struct kvm_vm *sev_vm_init_with_one_vcpu(uint32_t policy, void *guest_code,
 
 	vm = ____vm_create(mode, nr_pages);
 
+	vm_set_pgt_alloc_tracking(vm);
 	kvm_sev_ioctl(vm, KVM_SEV_INIT, NULL);
 
 	configure_sev_pte_masks(vm);
@@ -238,6 +241,8 @@ struct kvm_vm *sev_vm_init_with_one_vcpu(uint32_t policy, void *guest_code,
 
 void sev_vm_finalize(struct kvm_vm *vm, uint32_t policy)
 {
+	vm_map_page_table(vm, GUEST_PGT_MIN_VADDR);
+
 	sev_vm_launch(vm, policy);
 
 	sev_vm_measure(vm);
-- 
2.39.0.314.g84b9a713c41-goog