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authorAaron Lewis <aaronlewis@google.com>2021-02-10 19:50:36 +0300
committerPaolo Bonzini <pbonzini@redhat.com>2021-03-02 22:30:53 +0300
commit6528fc0a11de3d16339cf17639e2f69a68fcaf4d (patch)
tree9357e74c580d64eabc05c5686fc8cde3c58fe433 /tools
parent7d2cdad0da9dc0b1eb74c498c155be8c35a49ee6 (diff)
downloadlinux-6528fc0a11de3d16339cf17639e2f69a68fcaf4d.tar.xz
selftests: kvm: Mmap the entire vcpu mmap area
The vcpu mmap area may consist of more than just the kvm_run struct. Allocate enough space for the entire vcpu mmap area. Without this, on x86, the PIO page, for example, will be missing. This is problematic when dealing with an unhandled exception from the guest as the exception vector will be incorrectly reported as 0x0. Message-Id: <20210210165035.3712489-1-aaronlewis@google.com> Reviewed-by: Andrew Jones <drjones@redhat.com> Co-developed-by: Steve Rutherford <srutherford@google.com> Signed-off-by: Aaron Lewis <aaronlewis@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'tools')
-rw-r--r--tools/testing/selftests/kvm/lib/kvm_util.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
index d787cb802b4a..e5fbf16f725b 100644
--- a/tools/testing/selftests/kvm/lib/kvm_util.c
+++ b/tools/testing/selftests/kvm/lib/kvm_util.c
@@ -21,6 +21,8 @@
#define KVM_UTIL_PGS_PER_HUGEPG 512
#define KVM_UTIL_MIN_PFN 2
+static int vcpu_mmap_sz(void);
+
/* Aligns x up to the next multiple of size. Size must be a power of 2. */
static void *align(void *x, size_t size)
{
@@ -509,7 +511,7 @@ static void vm_vcpu_rm(struct kvm_vm *vm, struct vcpu *vcpu)
vcpu->dirty_gfns = NULL;
}
- ret = munmap(vcpu->state, sizeof(*vcpu->state));
+ ret = munmap(vcpu->state, vcpu_mmap_sz());
TEST_ASSERT(ret == 0, "munmap of VCPU fd failed, rc: %i "
"errno: %i", ret, errno);
close(vcpu->fd);
@@ -978,7 +980,7 @@ void vm_vcpu_add(struct kvm_vm *vm, uint32_t vcpuid)
TEST_ASSERT(vcpu_mmap_sz() >= sizeof(*vcpu->state), "vcpu mmap size "
"smaller than expected, vcpu_mmap_sz: %i expected_min: %zi",
vcpu_mmap_sz(), sizeof(*vcpu->state));
- vcpu->state = (struct kvm_run *) mmap(NULL, sizeof(*vcpu->state),
+ vcpu->state = (struct kvm_run *) mmap(NULL, vcpu_mmap_sz(),
PROT_READ | PROT_WRITE, MAP_SHARED, vcpu->fd, 0);
TEST_ASSERT(vcpu->state != MAP_FAILED, "mmap vcpu_state failed, "
"vcpu id: %u errno: %i", vcpuid, errno);