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Subject[RFC PATCH 26/26] selftests: add HugeTLB HGM to KVM demand paging selftest
From
This doesn't address collapsing yet, and it only works with the MINOR
mode (UFFDIO_CONTINUE).

Signed-off-by: James Houghton <jthoughton@google.com>
---
tools/testing/selftests/kvm/include/test_util.h | 2 ++
tools/testing/selftests/kvm/lib/kvm_util.c | 2 +-
tools/testing/selftests/kvm/lib/test_util.c | 14 ++++++++++++++
3 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/kvm/include/test_util.h b/tools/testing/selftests/kvm/include/test_util.h
index 99e0dcdc923f..6209e44981a7 100644
--- a/tools/testing/selftests/kvm/include/test_util.h
+++ b/tools/testing/selftests/kvm/include/test_util.h
@@ -87,6 +87,7 @@ enum vm_mem_backing_src_type {
VM_MEM_SRC_ANONYMOUS_HUGETLB_16GB,
VM_MEM_SRC_SHMEM,
VM_MEM_SRC_SHARED_HUGETLB,
+ VM_MEM_SRC_SHARED_HUGETLB_HGM,
NUM_SRC_TYPES,
};

@@ -105,6 +106,7 @@ size_t get_def_hugetlb_pagesz(void);
const struct vm_mem_backing_src_alias *vm_mem_backing_src_alias(uint32_t i);
size_t get_backing_src_pagesz(uint32_t i);
bool is_backing_src_hugetlb(uint32_t i);
+bool is_backing_src_shared_hugetlb(enum vm_mem_backing_src_type src_type);
void backing_src_help(const char *flag);
enum vm_mem_backing_src_type parse_backing_src_type(const char *type_name);
long get_run_delay(void);
diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
index 1665a220abcb..382f8fb75b7f 100644
--- a/tools/testing/selftests/kvm/lib/kvm_util.c
+++ b/tools/testing/selftests/kvm/lib/kvm_util.c
@@ -993,7 +993,7 @@ void vm_userspace_mem_region_add(struct kvm_vm *vm,
region->fd = -1;
if (backing_src_is_shared(src_type))
region->fd = kvm_memfd_alloc(region->mmap_size,
- src_type == VM_MEM_SRC_SHARED_HUGETLB);
+ is_backing_src_shared_hugetlb(src_type));

region->mmap_start = mmap(NULL, region->mmap_size,
PROT_READ | PROT_WRITE,
diff --git a/tools/testing/selftests/kvm/lib/test_util.c b/tools/testing/selftests/kvm/lib/test_util.c
index 6d23878bbfe1..710dc42077fe 100644
--- a/tools/testing/selftests/kvm/lib/test_util.c
+++ b/tools/testing/selftests/kvm/lib/test_util.c
@@ -254,6 +254,13 @@ const struct vm_mem_backing_src_alias *vm_mem_backing_src_alias(uint32_t i)
*/
.flag = MAP_SHARED,
},
+ [VM_MEM_SRC_SHARED_HUGETLB_HGM] = {
+ /*
+ * Identical to shared_hugetlb except for the name.
+ */
+ .name = "shared_hugetlb_hgm",
+ .flag = MAP_SHARED,
+ },
};
_Static_assert(ARRAY_SIZE(aliases) == NUM_SRC_TYPES,
"Missing new backing src types?");
@@ -272,6 +279,7 @@ size_t get_backing_src_pagesz(uint32_t i)
switch (i) {
case VM_MEM_SRC_ANONYMOUS:
case VM_MEM_SRC_SHMEM:
+ case VM_MEM_SRC_SHARED_HUGETLB_HGM:
return getpagesize();
case VM_MEM_SRC_ANONYMOUS_THP:
return get_trans_hugepagesz();
@@ -288,6 +296,12 @@ bool is_backing_src_hugetlb(uint32_t i)
return !!(vm_mem_backing_src_alias(i)->flag & MAP_HUGETLB);
}

+bool is_backing_src_shared_hugetlb(enum vm_mem_backing_src_type src_type)
+{
+ return src_type == VM_MEM_SRC_SHARED_HUGETLB ||
+ src_type == VM_MEM_SRC_SHARED_HUGETLB_HGM;
+}
+
static void print_available_backing_src_types(const char *prefix)
{
int i;
--
2.37.0.rc0.161.g10f37bed90-goog
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