linux-kernel - [PATCH v3 01/11] KVM: selftests: Add vm_alloc_page_table_in

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Date:   Wed, 30 Mar 2022 10:46:11 -0700
From:   Ben Gardon <bgardon@...gle.com>
To:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Cc:     Paolo Bonzini <pbonzini@...hat.com>, Peter Xu <peterx@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>,
        David Matlack <dmatlack@...gle.com>,
        Jim Mattson <jmattson@...gle.com>,
        David Dunn <daviddunn@...gle.com>,
        Jing Zhang <jingzhangos@...gle.com>,
        Junaid Shahid <junaids@...gle.com>,
        Ricardo Koller <ricarkol@...gle.com>,
        Ben Gardon <bgardon@...gle.com>
Subject: [PATCH v3 01/11] KVM: selftests: Add vm_alloc_page_table_in_memslot
 library function

From: Ricardo Koller <ricarkol@...gle.com>

Add a library function to allocate a page-table physical page in a
particular memslot.  The default behavior is to create new page-table
pages in memslot 0.

Signed-off-by: Ricardo Koller <ricarkol@...gle.com>
Reviewed-by: Ben Gardon <bgardon@...gle.com>
Signed-off-by: Ben Gardon <bgardon@...gle.com>
---
 tools/testing/selftests/kvm/include/kvm_util_base.h | 1 +
 tools/testing/selftests/kvm/lib/kvm_util.c          | 8 +++++++-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/kvm/include/kvm_util_base.h b/tools/testing/selftests/kvm/include/kvm_util_base.h
index 92cef0ffb19e..976aaaba8769 100644
--- a/tools/testing/selftests/kvm/include/kvm_util_base.h
+++ b/tools/testing/selftests/kvm/include/kvm_util_base.h
@@ -311,6 +311,7 @@ vm_paddr_t vm_phy_page_alloc(struct kvm_vm *vm, vm_paddr_t paddr_min,
 vm_paddr_t vm_phy_pages_alloc(struct kvm_vm *vm, size_t num,
 			      vm_paddr_t paddr_min, uint32_t memslot);
 vm_paddr_t vm_alloc_page_table(struct kvm_vm *vm);
+vm_paddr_t vm_alloc_page_table_in_memslot(struct kvm_vm *vm, uint32_t pt_memslot);
 
 /*
  * Create a VM with reasonable defaults
diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
index 1665a220abcb..11a692cf4570 100644
--- a/tools/testing/selftests/kvm/lib/kvm_util.c
+++ b/tools/testing/selftests/kvm/lib/kvm_util.c
@@ -2425,9 +2425,15 @@ vm_paddr_t vm_phy_page_alloc(struct kvm_vm *vm, vm_paddr_t paddr_min,
 /* Arbitrary minimum physical address used for virtual translation tables. */
 #define KVM_GUEST_PAGE_TABLE_MIN_PADDR 0x180000
 
+vm_paddr_t vm_alloc_page_table_in_memslot(struct kvm_vm *vm, uint32_t pt_memslot)
+{
+	return vm_phy_page_alloc(vm, KVM_GUEST_PAGE_TABLE_MIN_PADDR,
+			pt_memslot);
+}
+
 vm_paddr_t vm_alloc_page_table(struct kvm_vm *vm)
 {
-	return vm_phy_page_alloc(vm, KVM_GUEST_PAGE_TABLE_MIN_PADDR, 0);
+	return vm_alloc_page_table_in_memslot(vm, 0);
 }
 
 /*
-- 
2.35.1.1021.g381101b075-goog