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From: Ben Gardon <bgardon@google.com>
To: kvm@vger.kernel.org, linux-kselftest@vger.kernel.org
Cc: Paolo Bonzini <pbonzini@redhat.com>,
	Cannon Matthews <cannonmatthews@google.com>,
	Peter Xu <peterx@redhat.com>, Andrew Jones <drjones@redhat.com>,
	Ben Gardon <bgardon@google.com>
Subject: [PATCH 7/9] KVM: selftests: Add parameter to _vm_create for memslot 0 base paddr
Date: Fri, 27 Sep 2019 09:18:35 -0700	[thread overview]
Message-ID: <20190927161836.57978-8-bgardon@google.com> (raw)
In-Reply-To: <20190927161836.57978-1-bgardon@google.com>

KVM creates internal memslots between 3 and 4 GiB paddrs on the first
vCPU creation. If memslot 0 is large enough it collides with these
memslots an causes vCPU creation to fail. Add a paddr parameter for
memslot 0 so that tests which support large VMs can relocate memslot 0
above 4 GiB.

Signed-off-by: Ben Gardon <bgardon@google.com>
---
 tools/testing/selftests/kvm/demand_paging_test.c | 2 +-
 tools/testing/selftests/kvm/dirty_log_test.c     | 2 +-
 tools/testing/selftests/kvm/include/kvm_util.h   | 3 ++-
 tools/testing/selftests/kvm/lib/kvm_util.c       | 7 ++++---
 4 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/tools/testing/selftests/kvm/demand_paging_test.c b/tools/testing/selftests/kvm/demand_paging_test.c
index fe6c5a4f8b8c2..eb1f7e4b83de3 100644
--- a/tools/testing/selftests/kvm/demand_paging_test.c
+++ b/tools/testing/selftests/kvm/demand_paging_test.c
@@ -171,7 +171,7 @@ static struct kvm_vm *create_vm(enum vm_guest_mode mode, int vcpus,
 	pages += (2 * pages) / PTES_PER_PT;
 	pages += ((2 * vcpus * vcpu_wss) >> PAGE_SHIFT_4K) / PTES_PER_PT;
 
-	vm = _vm_create(mode, pages, O_RDWR);
+	vm = vm_create(mode, pages, O_RDWR);
 	kvm_vm_elf_load(vm, program_invocation_name, 0, 0);
 #ifdef __x86_64__
 	vm_create_irqchip(vm);
diff --git a/tools/testing/selftests/kvm/dirty_log_test.c b/tools/testing/selftests/kvm/dirty_log_test.c
index 5614222a66285..181eac3a12b66 100644
--- a/tools/testing/selftests/kvm/dirty_log_test.c
+++ b/tools/testing/selftests/kvm/dirty_log_test.c
@@ -252,7 +252,7 @@ static struct kvm_vm *create_vm(enum vm_guest_mode mode, uint32_t vcpuid,
 	struct kvm_vm *vm;
 	uint64_t extra_pg_pages = extra_mem_pages / 512 * 2;
 
-	vm = _vm_create(mode, DEFAULT_GUEST_PHY_PAGES + extra_pg_pages, O_RDWR);
+	vm = vm_create(mode, DEFAULT_GUEST_PHY_PAGES + extra_pg_pages, O_RDWR);
 	kvm_vm_elf_load(vm, program_invocation_name, 0, 0);
 #ifdef __x86_64__
 	vm_create_irqchip(vm);
diff --git a/tools/testing/selftests/kvm/include/kvm_util.h b/tools/testing/selftests/kvm/include/kvm_util.h
index 29cccaf96baf6..4f672c00c9e9b 100644
--- a/tools/testing/selftests/kvm/include/kvm_util.h
+++ b/tools/testing/selftests/kvm/include/kvm_util.h
@@ -69,7 +69,8 @@ int kvm_check_cap(long cap);
 int vm_enable_cap(struct kvm_vm *vm, struct kvm_enable_cap *cap);
 
 struct kvm_vm *vm_create(enum vm_guest_mode mode, uint64_t phy_pages, int perm);
-struct kvm_vm *_vm_create(enum vm_guest_mode mode, uint64_t phy_pages, int perm);
+struct kvm_vm *_vm_create(enum vm_guest_mode mode, uint64_t guest_paddr,
+			  uint64_t phy_pages, int perm);
 void kvm_vm_free(struct kvm_vm *vmp);
 void kvm_vm_restart(struct kvm_vm *vmp, int perm);
 void kvm_vm_release(struct kvm_vm *vmp);
diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
index 80a338b5403c3..7ec2bbdaba875 100644
--- a/tools/testing/selftests/kvm/lib/kvm_util.c
+++ b/tools/testing/selftests/kvm/lib/kvm_util.c
@@ -132,7 +132,8 @@ _Static_assert(sizeof(vm_guest_mode_string)/sizeof(char *) == NUM_VM_MODES,
  * descriptor to control the created VM is created with the permissions
  * given by perm (e.g. O_RDWR).
  */
-struct kvm_vm *_vm_create(enum vm_guest_mode mode, uint64_t phy_pages, int perm)
+struct kvm_vm *_vm_create(enum vm_guest_mode mode, uint64_t guest_paddr,
+			  uint64_t phy_pages, int perm)
 {
 	struct kvm_vm *vm;
 
@@ -229,14 +230,14 @@ struct kvm_vm *_vm_create(enum vm_guest_mode mode, uint64_t phy_pages, int perm)
 	vm->vpages_mapped = sparsebit_alloc();
 	if (phy_pages != 0)
 		vm_userspace_mem_region_add(vm, VM_MEM_SRC_ANONYMOUS,
-					    0, 0, phy_pages, 0);
+					    guest_paddr, 0, phy_pages, 0);
 
 	return vm;
 }
 
 struct kvm_vm *vm_create(enum vm_guest_mode mode, uint64_t phy_pages, int perm)
 {
-	return _vm_create(mode, phy_pages, perm);
+	return _vm_create(mode, 0, phy_pages, perm);
 }
 
 /*
-- 
2.23.0.444.g18eeb5a265-goog


  parent reply	other threads:[~2019-09-27 16:18 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-27 16:18 [PATCH 0/9] Create a userfaultfd demand paging test Ben Gardon
2019-09-27 16:18 ` [PATCH 1/9] KVM: selftests: Create a " Ben Gardon
2019-09-27 16:18 ` [PATCH 2/9] KVM: selftests: Add demand paging content to the " Ben Gardon
2019-09-29  7:11   ` Peter Xu
2019-09-27 16:18 ` [PATCH 3/9] KVM: selftests: Add memory size parameter " Ben Gardon
2019-09-27 16:18 ` [PATCH 4/9] KVM: selftests: Pass args to vCPU instead of using globals Ben Gardon
2019-10-03  7:38   ` Andrew Jones
2019-09-27 16:18 ` [PATCH 5/9] KVM: selftests: Support multiple vCPUs in demand paging test Ben Gardon
2019-09-27 16:18 ` [PATCH 6/9] KVM: selftests: Time guest demand paging Ben Gardon
2019-09-27 16:18 ` Ben Gardon [this message]
2019-10-03  8:10   ` [PATCH 7/9] KVM: selftests: Add parameter to _vm_create for memslot 0 base paddr Andrew Jones
2019-09-27 16:18 ` [PATCH 8/9] KVM: selftests: Support large VMs in demand paging test Ben Gardon
2019-09-29  7:22 ` [PATCH 0/9] Create a userfaultfd " Peter Xu
2019-09-30 17:02   ` Ben Gardon

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