Re: [PATCH v4 13/14] KVM: selftests: Add option for different backing in pre-fault tests
From: Fuad Tabba <fuad.tabba@linux.dev>
Date: 2026-09-24 06:09:31
Also in:
kvm, kvmarm, linux-doc, linux-kselftest, linux-s390, lkml
Hi Lorenzo, On Wed, 23 Sep 2026 16:15:56 +0100, "Lorenzo Stoakes (ARM)" [off-list ref] wrote: [...]
quoted hunk ↗ jump to hunk
diff --git a/tools/testing/selftests/kvm/pre_fault_memory_test.c b/tools/testing/selftests/kvm/pre_fault_memory_test.c
[...]
quoted hunk ↗ jump to hunk
@@ -189,24 +195,28 @@ static void __test_pre_fault_memory(enum vm_guest_mode guest_mode, void *arg)
[...]
quoted hunk ↗ jump to hunk
test_config.test_size = align_up(TEST_BASE_SIZE + test_config.page_size, - host_page_size); + mem_page_size); test_config.test_num_pages = vm_calc_num_guest_pages(vm->mode, test_config.test_size);
With -s anonymous_hugetlb_1gb, test_size becomes 1G and setup aborts
on 4K guest modes, as memslot 0 has no room for the page tables that
map it:
No guest physical page available, min_gpa: 0x180000 page_size:
0x1000 memslot: 0
As a followup, could you compute test_num_pages before creating the VM
and pass it as extra_mem_pages, as arm64/sea_to_user.c does?
Reviewed-by: Fuad Tabba <fuad.tabba@linux.dev>
Cheers,
/fuad