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 8/9] KVM: selftests: Support large VMs in demand paging test
Date: Fri, 27 Sep 2019 09:18:36 -0700 [thread overview]
Message-ID: <20190927161836.57978-9-bgardon@google.com> (raw)
In-Reply-To: <20190927161836.57978-1-bgardon@google.com>
Move memslot 0 past 4 GiB to support the large page tables required to
map several TiB of memory.
Signed-off-by: Ben Gardon <bgardon@google.com>
---
tools/testing/selftests/kvm/demand_paging_test.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/kvm/demand_paging_test.c b/tools/testing/selftests/kvm/demand_paging_test.c
index eb1f7e4b83de3..a733bb3c91fd4 100644
--- a/tools/testing/selftests/kvm/demand_paging_test.c
+++ b/tools/testing/selftests/kvm/demand_paging_test.c
@@ -24,6 +24,12 @@
#include "kvm_util.h"
#include "processor.h"
+/*
+ * Put slot 0 past the first 4G of guest physical address to avoid collision
+ * with KVM-internal memslots.
+ */
+#define SLOT_0_GPA (4UL << 30)
+
/* The memory slot index demand page */
#define TEST_MEM_SLOT_INDEX 1
@@ -171,7 +177,7 @@ 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, SLOT_0_GPA, pages, O_RDWR);
kvm_vm_elf_load(vm, program_invocation_name, 0, 0);
#ifdef __x86_64__
vm_create_irqchip(vm);
--
2.23.0.444.g18eeb5a265-goog
next prev parent reply other threads:[~2019-09-27 16:19 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 ` [PATCH 7/9] KVM: selftests: Add parameter to _vm_create for memslot 0 base paddr Ben Gardon
2019-10-03 8:10 ` Andrew Jones
2019-09-27 16:18 ` Ben Gardon [this message]
2019-09-29 7:22 ` [PATCH 0/9] Create a userfaultfd demand paging test Peter Xu
2019-09-30 17:02 ` Ben Gardon
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