From: Martin Fernandez <martin.fernandez@eclypsium.com>
To: linux-kernel@vger.kernel.org, linux-efi@vger.kernel.org,
platform-driver-x86@vger.kernel.org, linux-mm@kvack.org,
kunit-dev@googlegroups.com, linux-kselftest@vger.kernel.org
Cc: tglx@linutronix.de, mingo@redhat.com, bp@alien8.de,
dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com,
ardb@kernel.org, dvhart@infradead.org, andy@infradead.org,
gregkh@linuxfoundation.org, rafael@kernel.org, rppt@kernel.org,
akpm@linux-foundation.org, daniel.gutson@eclypsium.com,
hughsient@gmail.com, alex.bazhaniuk@eclypsium.com,
alison.schofield@intel.com, keescook@chromium.org,
Martin Fernandez <martin.fernandez@eclypsium.com>
Subject: [PATCH v9 7/9] x86/e820: Add unit tests for e820_range_* functions
Date: Mon, 4 Jul 2022 10:58:31 -0300 [thread overview]
Message-ID: <20220704135833.1496303-8-martin.fernandez@eclypsium.com> (raw)
In-Reply-To: <20220704135833.1496303-1-martin.fernandez@eclypsium.com>
Add KUnit tests for the e820_range_* functions.
Signed-off-by: Martin Fernandez <martin.fernandez@eclypsium.com>
---
arch/x86/Kconfig.debug | 10 ++
arch/x86/kernel/e820.c | 5 +
arch/x86/kernel/e820_test.c | 249 ++++++++++++++++++++++++++++++++++++
3 files changed, 264 insertions(+)
create mode 100644 arch/x86/kernel/e820_test.c
diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug
index d872a7522e55..b5040d345fb4 100644
--- a/arch/x86/Kconfig.debug
+++ b/arch/x86/Kconfig.debug
@@ -225,6 +225,16 @@ config PUNIT_ATOM_DEBUG
The current power state can be read from
/sys/kernel/debug/punit_atom/dev_power_state
+config E820_KUNIT_TEST
+ tristate "Tests for E820" if !KUNIT_ALL_TESTS
+ depends on KUNIT=y
+ default KUNIT_ALL_TESTS
+ help
+ This option enables unit tests for the e820.c code. It
+ should be enabled only in development environments.
+
+ If unsure, say N.
+
choice
prompt "Choose kernel unwinder"
default UNWINDER_ORC if X86_64
diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
index dade59758b9f..a6ced3e306dd 100644
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -1546,3 +1546,8 @@ void __init e820__memblock_setup(void)
memblock_dump_all();
}
+
+#ifdef CONFIG_E820_KUNIT_TEST
+/* Let e820_test have access the static functions in this file */
+#include "e820_test.c"
+#endif
diff --git a/arch/x86/kernel/e820_test.c b/arch/x86/kernel/e820_test.c
new file mode 100644
index 000000000000..6b28ea131380
--- /dev/null
+++ b/arch/x86/kernel/e820_test.c
@@ -0,0 +1,249 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#include <kunit/test.h>
+
+#include <asm/e820/api.h>
+#include <asm/setup.h>
+
+#define KUNIT_EXPECT_E820_ENTRY_EQ(_test, _entry, _addr, _size, _type, \
+ _crypto_capable) \
+ do { \
+ KUNIT_EXPECT_EQ((_test), (_entry).addr, (_addr)); \
+ KUNIT_EXPECT_EQ((_test), (_entry).size, (_size)); \
+ KUNIT_EXPECT_EQ((_test), (_entry).type, (_type)); \
+ KUNIT_EXPECT_EQ((_test), (_entry).crypto_capable, \
+ (_crypto_capable)); \
+ } while (0)
+
+struct e820_table test_table __initdata;
+
+static void __init test_e820_range_add(struct kunit *test)
+{
+ u32 full = ARRAY_SIZE(test_table.entries);
+ /* Add last entry. */
+ test_table.nr_entries = full - 1;
+ __e820__range_add(&test_table, 0, 15, 0, 0);
+ KUNIT_EXPECT_EQ(test, test_table.nr_entries, full);
+ /* Skip new entry when full. */
+ __e820__range_add(&test_table, 0, 15, 0, 0);
+ KUNIT_EXPECT_EQ(test, test_table.nr_entries, full);
+}
+
+static void __init test_e820_range_update(struct kunit *test)
+{
+ u64 entry_size = 15;
+ u64 updated_size = 0;
+ /* Initialize table */
+ test_table.nr_entries = 0;
+ __e820__range_add(&test_table, 0, entry_size, E820_TYPE_RAM,
+ E820_NOT_CRYPTO_CAPABLE);
+ __e820__range_add(&test_table, entry_size, entry_size, E820_TYPE_RAM,
+ E820_NOT_CRYPTO_CAPABLE);
+ __e820__range_add(&test_table, entry_size * 2, entry_size,
+ E820_TYPE_ACPI, E820_NOT_CRYPTO_CAPABLE);
+
+ updated_size = __e820__range_update(&test_table, 0, entry_size * 2,
+ E820_TYPE_RAM, E820_TYPE_RESERVED);
+
+ /* The first 2 regions were updated */
+ KUNIT_EXPECT_EQ(test, updated_size, entry_size * 2);
+ KUNIT_EXPECT_E820_ENTRY_EQ(test, test_table.entries[0], 0, entry_size,
+ E820_TYPE_RESERVED, E820_NOT_CRYPTO_CAPABLE);
+ KUNIT_EXPECT_E820_ENTRY_EQ(test, test_table.entries[1], entry_size,
+ entry_size, E820_TYPE_RESERVED,
+ E820_NOT_CRYPTO_CAPABLE);
+ KUNIT_EXPECT_E820_ENTRY_EQ(test, test_table.entries[2], entry_size * 2,
+ entry_size, E820_TYPE_ACPI,
+ E820_NOT_CRYPTO_CAPABLE);
+
+ updated_size = __e820__range_update(&test_table, 0, entry_size * 3,
+ E820_TYPE_RESERVED, E820_TYPE_RAM);
+
+ /*
+ * Only the first 2 regions were updated,
+ * since E820_TYPE_ACPI > E820_TYPE_RESERVED
+ */
+ KUNIT_EXPECT_EQ(test, updated_size, entry_size * 2);
+ KUNIT_EXPECT_E820_ENTRY_EQ(test, test_table.entries[0], 0, entry_size,
+ E820_TYPE_RAM, E820_NOT_CRYPTO_CAPABLE);
+ KUNIT_EXPECT_E820_ENTRY_EQ(test, test_table.entries[1], entry_size,
+ entry_size, E820_TYPE_RAM,
+ E820_NOT_CRYPTO_CAPABLE);
+ KUNIT_EXPECT_E820_ENTRY_EQ(test, test_table.entries[2], entry_size * 2,
+ entry_size, E820_TYPE_ACPI,
+ E820_NOT_CRYPTO_CAPABLE);
+}
+
+static void __init test_e820_range_remove(struct kunit *test)
+{
+ u64 entry_size = 15;
+ u64 removed_size = 0;
+
+ struct e820_entry_updater updater = { .should_update =
+ remover__should_update,
+ .update = remover__update,
+ .new = NULL };
+
+ struct e820_remover_data data = { .check_type = true,
+ .old_type = E820_TYPE_RAM };
+
+ /* Initialize table */
+ test_table.nr_entries = 0;
+ __e820__range_add(&test_table, 0, entry_size, E820_TYPE_RAM,
+ E820_NOT_CRYPTO_CAPABLE);
+ __e820__range_add(&test_table, entry_size, entry_size, E820_TYPE_RAM,
+ E820_NOT_CRYPTO_CAPABLE);
+ __e820__range_add(&test_table, entry_size * 2, entry_size,
+ E820_TYPE_ACPI, E820_NOT_CRYPTO_CAPABLE);
+
+ /*
+ * Need to use __e820__handle_range_update because
+ * e820__range_remove doesn't ask for the table
+ */
+ removed_size = __e820__handle_range_update(&test_table,
+ 0, entry_size * 2,
+ &updater, &data);
+
+ /* The first two regions were removed */
+ KUNIT_EXPECT_EQ(test, removed_size, entry_size * 2);
+ KUNIT_EXPECT_E820_ENTRY_EQ(test, test_table.entries[0], 0, 0, 0, 0);
+ KUNIT_EXPECT_E820_ENTRY_EQ(test, test_table.entries[1], 0, 0, 0, 0);
+
+ removed_size = __e820__handle_range_update(&test_table,
+ 0, entry_size * 3,
+ &updater, &data);
+
+ /* Nothing was removed, since nothing matched the target type */
+ KUNIT_EXPECT_EQ(test, removed_size, 0);
+ KUNIT_EXPECT_E820_ENTRY_EQ(test, test_table.entries[0], 0, 0, 0, 0);
+ KUNIT_EXPECT_E820_ENTRY_EQ(test, test_table.entries[1], 0, 0, 0, 0);
+ KUNIT_EXPECT_E820_ENTRY_EQ(test, test_table.entries[2], entry_size * 2,
+ entry_size, E820_TYPE_ACPI,
+ E820_NOT_CRYPTO_CAPABLE);
+}
+
+static void __init test_e820_range_crypto_update(struct kunit *test)
+{
+ u64 entry_size = 15;
+ u64 updated_size = 0;
+ /* Initialize table */
+ test_table.nr_entries = 0;
+ __e820__range_add(&test_table, 0, entry_size, E820_TYPE_RAM,
+ E820_CRYPTO_CAPABLE);
+ __e820__range_add(&test_table, entry_size, entry_size, E820_TYPE_RAM,
+ E820_NOT_CRYPTO_CAPABLE);
+ __e820__range_add(&test_table, entry_size * 2, entry_size,
+ E820_TYPE_RAM, E820_CRYPTO_CAPABLE);
+
+ updated_size = __e820__range_update_crypto(&test_table,
+ 0, entry_size * 3,
+ E820_CRYPTO_CAPABLE);
+
+ /* Only the region in the middle was updated */
+ KUNIT_EXPECT_EQ(test, updated_size, entry_size);
+ KUNIT_EXPECT_E820_ENTRY_EQ(test, test_table.entries[0], 0, entry_size,
+ E820_TYPE_RAM, E820_CRYPTO_CAPABLE);
+ KUNIT_EXPECT_E820_ENTRY_EQ(test, test_table.entries[1], entry_size,
+ entry_size, E820_TYPE_RAM,
+ E820_CRYPTO_CAPABLE);
+ KUNIT_EXPECT_E820_ENTRY_EQ(test, test_table.entries[2], entry_size * 2,
+ entry_size, E820_TYPE_RAM,
+ E820_CRYPTO_CAPABLE);
+}
+
+static void __init test_e820_handle_range_update_intersection(struct kunit *test)
+{
+ struct e820_entry_updater updater = {
+ .should_update = type_updater__should_update,
+ .update = type_updater__update,
+ .new = type_updater__new
+ };
+
+ struct e820_type_updater_data data = { .old_type = E820_TYPE_RAM,
+ .new_type = E820_TYPE_RESERVED };
+
+ u64 entry_size = 15;
+ u64 intersection_size = 2;
+ u64 updated_size = 0;
+ /* Initialize table */
+ test_table.nr_entries = 0;
+ __e820__range_add(&test_table, 0, entry_size, E820_TYPE_RAM,
+ E820_NOT_CRYPTO_CAPABLE);
+
+ updated_size =
+ __e820__handle_range_update(&test_table, 0,
+ entry_size - intersection_size,
+ &updater, &data);
+
+ KUNIT_EXPECT_EQ(test, updated_size, entry_size - intersection_size);
+
+ /* There is a new entry */
+ KUNIT_EXPECT_EQ(test, test_table.nr_entries, intersection_size);
+
+ /* The original entry now is moved */
+ KUNIT_EXPECT_E820_ENTRY_EQ(test, test_table.entries[0],
+ entry_size - intersection_size,
+ intersection_size, E820_TYPE_RAM,
+ E820_NOT_CRYPTO_CAPABLE);
+
+ /* The new entry has the correct values */
+ KUNIT_EXPECT_E820_ENTRY_EQ(test, test_table.entries[1], 0,
+ entry_size - intersection_size,
+ E820_TYPE_RESERVED, E820_NOT_CRYPTO_CAPABLE);
+}
+
+static void __init test_e820_handle_range_update_inside(struct kunit *test)
+{
+ struct e820_entry_updater updater = {
+ .should_update = type_updater__should_update,
+ .update = type_updater__update,
+ .new = type_updater__new
+ };
+
+ struct e820_type_updater_data data = { .old_type = E820_TYPE_RAM,
+ .new_type = E820_TYPE_RESERVED };
+
+ u64 entry_size = 15;
+ u64 updated_size = 0;
+ /* Initialize table */
+ test_table.nr_entries = 0;
+ __e820__range_add(&test_table, 0, entry_size, E820_TYPE_RAM,
+ E820_NOT_CRYPTO_CAPABLE);
+
+ updated_size = __e820__handle_range_update(&test_table, 5,
+ entry_size - 10,
+ &updater, &data);
+
+ KUNIT_EXPECT_EQ(test, updated_size, entry_size - 10);
+
+ /* There are two new entrie */
+ KUNIT_EXPECT_EQ(test, test_table.nr_entries, 3);
+
+ /* The original entry now shrunk */
+ KUNIT_EXPECT_E820_ENTRY_EQ(test, test_table.entries[0], 0, 5,
+ E820_TYPE_RAM, E820_NOT_CRYPTO_CAPABLE);
+
+ /* The new entries have the correct values */
+ KUNIT_EXPECT_E820_ENTRY_EQ(test, test_table.entries[1], 5,
+ entry_size - 10, E820_TYPE_RESERVED,
+ E820_NOT_CRYPTO_CAPABLE);
+ /* Left over of the original region */
+ KUNIT_EXPECT_E820_ENTRY_EQ(test, test_table.entries[2], entry_size - 5,
+ 5, E820_TYPE_RAM, E820_NOT_CRYPTO_CAPABLE);
+}
+
+static struct kunit_case e820_test_cases[] __initdata = {
+ KUNIT_CASE(test_e820_range_add),
+ KUNIT_CASE(test_e820_range_update),
+ KUNIT_CASE(test_e820_range_remove),
+ KUNIT_CASE(test_e820_range_crypto_update),
+ KUNIT_CASE(test_e820_handle_range_update_intersection),
+ KUNIT_CASE(test_e820_handle_range_update_inside),
+ {}
+};
+
+static struct kunit_suite e820_test_suite __initdata = {
+ .name = "e820",
+ .test_cases = e820_test_cases,
+};
+
+kunit_test_init_section_suite(e820_test_suite);
--
2.30.2
next prev parent reply other threads:[~2022-07-04 14:00 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-04 13:58 [PATCH v9 0/9] x86: Show in sysfs if a memory node is able to do encryption Martin Fernandez
2022-07-04 13:58 ` [PATCH v9 1/9] mm/memblock: Tag memblocks with crypto capabilities Martin Fernandez
2022-07-04 13:58 ` [PATCH v9 2/9] mm/mmzone: Tag pg_data_t " Martin Fernandez
2022-10-07 15:53 ` Kirill A. Shutemov
2022-10-11 13:28 ` Martin Fernandez
2022-10-11 15:27 ` Kirill A. Shutemov
2022-07-04 13:58 ` [PATCH v9 3/9] x86/e820: Add infrastructure to refactor e820__range_{update,remove} Martin Fernandez
2022-07-04 13:58 ` [PATCH v9 4/9] x86/e820: Refactor __e820__range_update Martin Fernandez
2022-07-04 13:58 ` [PATCH v9 5/9] x86/e820: Refactor e820__range_remove Martin Fernandez
2022-07-04 13:58 ` [PATCH v9 6/9] x86/e820: Tag e820_entry with crypto capabilities Martin Fernandez
2022-07-04 13:58 ` Martin Fernandez [this message]
2022-07-05 2:04 ` [PATCH v9 7/9] x86/e820: Add unit tests for e820_range_* functions David Gow
2022-07-05 17:24 ` Martin Fernandez
2022-07-04 13:58 ` [PATCH v9 8/9] x86/efi: Mark e820_entries as crypto capable from EFI memmap Martin Fernandez
2022-07-04 13:58 ` [PATCH v9 9/9] drivers/node: Show in sysfs node's crypto capabilities Martin Fernandez
2022-07-04 14:34 ` Greg KH
2022-07-05 17:35 ` Martin Fernandez
2022-07-06 6:38 ` Greg KH
2022-10-13 19:48 ` [PATCH v9 0/9] x86: Show in sysfs if a memory node is able to do encryption Borislav Petkov
2022-10-13 21:00 ` Martin Fernandez
2022-10-27 8:57 ` Borislav Petkov
2022-10-27 15:21 ` Dave Hansen
2022-10-27 15:33 ` Borislav Petkov
2022-10-14 0:24 ` Dave Hansen
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