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charset="UTF-8" X-Rspam-User: X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: B2EA7C0002 X-Stat-Signature: emc7bdg5c6pi6no8fe3eaxtejgyc3p9j X-HE-Tag: 1747266248-634306 X-HE-Meta: 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 kVui8/Pf 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: This patch adds tests for allocation and conversion of subfolios in a large folio. Change-Id: I37035b2c24398e2c83a2ac5a46b4e6ceed2a8b53 Signed-off-by: Ackerley Tng --- .../kvm/guest_memfd_conversions_test.c | 88 +++++++++++++++++++ 1 file changed, 88 insertions(+) diff --git a/tools/testing/selftests/kvm/guest_memfd_conversions_test.c b/tools/testing/selftests/kvm/guest_memfd_conversions_test.c index 435f91424d5f..c31d1abd1b93 100644 --- a/tools/testing/selftests/kvm/guest_memfd_conversions_test.c +++ b/tools/testing/selftests/kvm/guest_memfd_conversions_test.c @@ -672,6 +672,92 @@ static void test_close_with_pinning(size_t test_page_size) __test_close_with_pinning(test_page_size, false); } +static void test_allocate_subfolios(size_t test_page_size) +{ + struct kvm_vcpu *vcpu; + struct kvm_vm *vm; + size_t increment; + int guest_memfd; + size_t nr_pages; + char *mem; + int i; + + if (test_page_size == PAGE_SIZE) + return; + + vm = setup_test(test_page_size, /*init_private=*/false, &vcpu, + &guest_memfd, &mem); + + nr_pages = test_page_size / PAGE_SIZE; + + /* + * Loop backwards to check allocation of the correct subfolio within the + * huge folio. If it were allocated wrongly, the second loop would error + * out because one or more of the checks would be wrong. + */ + increment = nr_pages >> 1; + for (i = nr_pages - 1; i >= 0; i -= increment) + host_use_memory(mem + i * PAGE_SIZE, 'X', 'A' + i); + for (i = nr_pages - 1; i >= 0; i -= increment) + host_use_memory(mem + i * PAGE_SIZE, 'A' + i, 'A' + i); + + cleanup_test(test_page_size, vm, guest_memfd, mem); +} + +static void test_convert_subfolios(size_t test_page_size) +{ + struct kvm_vcpu *vcpu; + struct kvm_vm *vm; + size_t increment; + int guest_memfd; + size_t nr_pages; + int to_convert; + char *mem; + int i; + + if (test_page_size == PAGE_SIZE) + return; + + vm = setup_test(test_page_size, /*init_private=*/true, &vcpu, + &guest_memfd, &mem); + + nr_pages = test_page_size / PAGE_SIZE; + + increment = nr_pages >> 1; + for (i = 0; i < nr_pages; i += increment) { + guest_use_memory(vcpu, + GUEST_MEMFD_SHARING_TEST_GVA + i * PAGE_SIZE, + 'X', 'A', 0); + assert_host_cannot_fault(mem + i * PAGE_SIZE); + } + + to_convert = round_up(nr_pages / 2, increment); + guest_memfd_convert_shared(guest_memfd, to_convert * PAGE_SIZE, PAGE_SIZE); + + + for (i = 0; i < nr_pages; i += increment) { + if (i == to_convert) + host_use_memory(mem + i * PAGE_SIZE, 'A', 'B'); + else + assert_host_cannot_fault(mem + i * PAGE_SIZE); + + guest_use_memory(vcpu, + GUEST_MEMFD_SHARING_TEST_GVA + i * PAGE_SIZE, + 'X', 'B', 0); + } + + guest_memfd_convert_private(guest_memfd, to_convert * PAGE_SIZE, PAGE_SIZE); + + for (i = 0; i < nr_pages; i += increment) { + guest_use_memory(vcpu, + GUEST_MEMFD_SHARING_TEST_GVA + i * PAGE_SIZE, + 'B', 'C', 0); + assert_host_cannot_fault(mem + i * PAGE_SIZE); + } + + cleanup_test(test_page_size, vm, guest_memfd, mem); +} + static void test_with_size(size_t test_page_size) { test_sharing(test_page_size); @@ -685,6 +771,8 @@ static void test_with_size(size_t test_page_size) test_truncate_shared_while_pinned(test_page_size); test_truncate_private(test_page_size); test_close_with_pinning(test_page_size); + test_allocate_subfolios(test_page_size); + test_convert_subfolios(test_page_size); } int main(int argc, char *argv[]) -- 2.49.0.1045.g170613ef41-goog