memblock_tests: move variable declarations to single block

Move variable declarations to a single block at the beginning of each
testing function.

Signed-off-by: Rebecca Mckeever <remckee0@gmail.com>
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Link: https://lore.kernel.org/r/e61431e73977f305fdd027bca99d1dc119e96d84.1662264355.git.remckee0@gmail.com

memblock tests: update alloc_api to test memblock_alloc_raw

Update memblock_alloc() tests so that they test either memblock_alloc()
or memblock_alloc_raw() depending on the value of alloc_test_flags. Run
through all the existing tests in memblock_alloc_api twice: once for
memblock_alloc() and once for memblock_alloc_raw().

When the tests run memblock_alloc(), they test that the entire memory
region is zero. When the tests run memblock_alloc_raw(), they test that
the entire memory region is nonzero. The content of the memory region is
initialized to nonzero, and we expect it to remain unchanged if running
memblock_alloc_raw().

Reviewed-by: Shaoqin Huang <shaoqin.huang@intel.com>
Signed-off-by: Rebecca Mckeever <remckee0@gmail.com>
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Link: https://lore.kernel.org/r/5a7cfb2f807ee2cb53ee77f9f5c910107b253d6e.1661578349.git.remckee0@gmail.com

memblock tests: add additional tests for basic api and memblock_alloc

Add tests for memblock_add(), memblock_reserve(), memblock_remove(),
memblock_free(), and memblock_alloc() for the following test scenarios.

memblock_add() and memblock_reserve():
- add/reserve a memory block in the gap between two existing memory
blocks, and check that the blocks are merged into one region
- try to add/reserve memblock regions that extend past PHYS_ADDR_MAX

memblock_remove() and memblock_free():
- remove/free a region when it is the only available region
+ These tests ensure that the first region is overwritten with a
"dummy" region when the last remaining region of that type is
removed or freed.
- remove/free() a region that overlaps with two existing regions of the
relevant type
- try to remove/free memblock regions that extend past PHYS_ADDR_MAX

memblock_alloc():
- try to allocate a region that is larger than the total size of available
memory (memblock.memory)

Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Shaoqin Huang <shaoqin.huang@intel.com>
Signed-off-by: Rebecca Mckeever <remckee0@gmail.com>
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Link: https://lore.kernel.org/r/c23c0393c5b9a53fe7f676996913c629495e9727.1661578349.git.remckee0@gmail.com

memblock tests: add labels to verbose output for generic alloc tests

Generic tests for memblock_alloc*() functions do not use separate
functions for testing top-down and bottom-up allocation directions.
Therefore, the function name that is displayed in the verbose testing
output does not include the allocation direction.

Add an additional prefix when running generic tests for
memblock_alloc*() functions that indicates which allocation direction is
set. The prefix will be displayed when the tests are run in verbose mode.

Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Shaoqin Huang <shaoqin.huang@intel.com>
Signed-off-by: Rebecca Mckeever <remckee0@gmail.com>
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Link: https://lore.kernel.org/r/fb76a42253d2a196a7daea29dd8121a69904f58e.1661578349.git.remckee0@gmail.com

memblock tests: update tests to check if memblock_alloc zeroed memory

Add an assert in memblock_alloc() tests where allocation is expected to
occur. The assert checks whether the entire chunk of allocated memory is
cleared.

The current memblock_alloc() tests do not check whether the allocated
memory was zeroed. memblock_alloc() should zero the allocated memory since
it is a wrapper for memblock_alloc_try_nid().

Reviewed-by: Shaoqin Huang <shaoqin.huang@intel.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Rebecca Mckeever <remckee0@gmail.com>
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Link: https://lore.kernel.org/r/83ffb941b65074f40eb14552f8bfe5b71fe50abd.1661578349.git.remckee0@gmail.com

memblock tests: add verbose output to memblock tests

Add and use functions and macros for printing verbose testing output.

If the Memblock simulator was compiled with VERBOSE=1:
- prefix_push(): appends the given string to a prefix string that will be
printed in test_fail() and test_pass*().

- prefix_pop(): removes the last prefix from the prefix string.

- prefix_reset(): clears the prefix string.

- test_fail(): prints a message after a test fails containing the test
number of the failing test and the prefix.

- test_pass(): prints a message after a test passes containing its test
number and the prefix.

- test_print(): prints the given formatted output string.

- test_pass_pop(): runs test_pass() followed by prefix_pop().

- PREFIX_PUSH(): runs prefix_push(__func__).

If the Memblock simulator was not compiled with VERBOSE=1, these
functions/macros do nothing.

Add the assert wrapper macros ASSERT_EQ(), ASSERT_NE(), and ASSERT_LT().
If the assert condition fails, these macros call test_fail() before
executing assert().

Acked-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Shaoqin Huang <shaoqin.huang@intel.com>
Signed-off-by: Rebecca Mckeever <remckee0@gmail.com>
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Link: https://lore.kernel.org/r/f234d443fe154d5ae8d8aa07284aff69edfb6f61.1656907314.git.remckee0@gmail.com

memblock tests: Add memblock_alloc tests for bottom up

Add checks for memblock_alloc for bottom up allocation direction.
The tested scenarios are:
- Region can be allocated on the first fit (with and without
region merging)
- Region can be allocated on the second fit (with and without
region merging)

Add test case wrappers to test both directions in the same context.

Signed-off-by: Karolina Drobnik <karolinadrobnik@gmail.com>
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Link: https://lore.kernel.org/r/426674eee20d99dca49caf1ee0142a83dccbc98d.1646055639.git.karolinadrobnik@gmail.com

memblock tests: Add memblock_alloc tests for top down

Add checks for memblock_alloc for top down allocation direction.
The tested scenarios are:
- Region can be allocated on the first fit (with and without
region merging)
- Region can be allocated on the second fit (with and without
region merging)

Add checks for both allocation directions:
- Region can be allocated between two already existing entries
- Limited memory available
- All memory is reserved
- No available memory registered with memblock

Signed-off-by: Karolina Drobnik <karolinadrobnik@gmail.com>
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Link: https://lore.kernel.org/r/26ccf409b8ff0394559d38d792b2afb24b55887c.1646055639.git.karolinadrobnik@gmail.com