Unverified Commit 4d0c04ea authored by Charlie Jenkins's avatar Charlie Jenkins Committed by Palmer Dabbelt
Browse files

RISC-V: mm: Add tests for RISC-V mm 



Add tests that enforce mmap hint address behavior. mmap should default
to sv48. mmap will provide an address at the highest address space that
can fit into the hint address, unless the hint address is less than sv39
and not 0, then it will return a sv39 address.

These tests are split into two files: mmap_default.c and mmap_bottomup.c
because a new process must be exec'd in order to change the mmap layout.
The run_mmap.sh script sets the stack to be unlimited for the
mmap_bottomup.c test which triggers a bottomup layout.

Signed-off-by: default avatarCharlie Jenkins <charlie@rivosinc.com>
Link: https://lore.kernel.org/r/20230809232218.849726-3-charlie@rivosinc.com


Signed-off-by: default avatarPalmer Dabbelt <palmer@rivosinc.com>
parent add2cc6b

tools/testing/selftests/riscv/Makefile

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@@ -5,7 +5,7 @@ 
ARCH ?= $(shell uname -m 2>/dev/null || echo not)



ifneq (,$(filter $(ARCH),riscv))

RISCV_SUBTARGETS ?= hwprobe vector

RISCV_SUBTARGETS ?= hwprobe vector mm

else

RISCV_SUBTARGETS :=

endif

tools/testing/selftests/riscv/mm/.gitignore

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mmap_bottomup

mmap_default

tools/testing/selftests/riscv/mm/Makefile

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# SPDX-License-Identifier: GPL-2.0

# Copyright (C) 2021 ARM Limited

# Originally tools/testing/arm64/abi/Makefile



# Additional include paths needed by kselftest.h and local headers

CFLAGS += -D_GNU_SOURCE -std=gnu99 -I.



TEST_GEN_FILES := testcases/mmap_default testcases/mmap_bottomup



TEST_PROGS := testcases/run_mmap.sh



include ../../lib.mk



$(OUTPUT)/mm: testcases/mmap_default.c testcases/mmap_bottomup.c testcases/mmap_tests.h

	$(CC) -o$@ $(CFLAGS) $(LDFLAGS) $^

tools/testing/selftests/riscv/mm/testcases/mmap_bottomup.c

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// SPDX-License-Identifier: GPL-2.0-only

#include <sys/mman.h>

#include <testcases/mmap_test.h>



#include "../../kselftest_harness.h"



TEST(infinite_rlimit)

{

// Only works on 64 bit

#if __riscv_xlen == 64

	struct addresses mmap_addresses;



	EXPECT_EQ(BOTTOM_UP, memory_layout());



	do_mmaps(&mmap_addresses);



	EXPECT_NE(MAP_FAILED, mmap_addresses.no_hint);

	EXPECT_NE(MAP_FAILED, mmap_addresses.on_37_addr);

	EXPECT_NE(MAP_FAILED, mmap_addresses.on_38_addr);

	EXPECT_NE(MAP_FAILED, mmap_addresses.on_46_addr);

	EXPECT_NE(MAP_FAILED, mmap_addresses.on_47_addr);

	EXPECT_NE(MAP_FAILED, mmap_addresses.on_55_addr);

	EXPECT_NE(MAP_FAILED, mmap_addresses.on_56_addr);



	EXPECT_GT(1UL << 47, (unsigned long)mmap_addresses.no_hint);

	EXPECT_GT(1UL << 38, (unsigned long)mmap_addresses.on_37_addr);

	EXPECT_GT(1UL << 38, (unsigned long)mmap_addresses.on_38_addr);

	EXPECT_GT(1UL << 38, (unsigned long)mmap_addresses.on_46_addr);

	EXPECT_GT(1UL << 47, (unsigned long)mmap_addresses.on_47_addr);

	EXPECT_GT(1UL << 47, (unsigned long)mmap_addresses.on_55_addr);

	EXPECT_GT(1UL << 56, (unsigned long)mmap_addresses.on_56_addr);

#endif

}



TEST_HARNESS_MAIN

tools/testing/selftests/riscv/mm/testcases/mmap_default.c

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// SPDX-License-Identifier: GPL-2.0-only

#include <sys/mman.h>

#include <testcases/mmap_test.h>



#include "../../kselftest_harness.h"



TEST(default_rlimit)

{

// Only works on 64 bit

#if __riscv_xlen == 64

	struct addresses mmap_addresses;



	EXPECT_EQ(TOP_DOWN, memory_layout());



	do_mmaps(&mmap_addresses);



	EXPECT_NE(MAP_FAILED, mmap_addresses.no_hint);

	EXPECT_NE(MAP_FAILED, mmap_addresses.on_37_addr);

	EXPECT_NE(MAP_FAILED, mmap_addresses.on_38_addr);

	EXPECT_NE(MAP_FAILED, mmap_addresses.on_46_addr);

	EXPECT_NE(MAP_FAILED, mmap_addresses.on_47_addr);

	EXPECT_NE(MAP_FAILED, mmap_addresses.on_55_addr);

	EXPECT_NE(MAP_FAILED, mmap_addresses.on_56_addr);



	EXPECT_GT(1UL << 47, (unsigned long)mmap_addresses.no_hint);

	EXPECT_GT(1UL << 38, (unsigned long)mmap_addresses.on_37_addr);

	EXPECT_GT(1UL << 38, (unsigned long)mmap_addresses.on_38_addr);

	EXPECT_GT(1UL << 38, (unsigned long)mmap_addresses.on_46_addr);

	EXPECT_GT(1UL << 47, (unsigned long)mmap_addresses.on_47_addr);

	EXPECT_GT(1UL << 47, (unsigned long)mmap_addresses.on_55_addr);

	EXPECT_GT(1UL << 56, (unsigned long)mmap_addresses.on_56_addr);

#endif

}



TEST_HARNESS_MAIN