selftests/powerpc: Import Anton's memcpy / copy_tofrom_user tests
Turn Anton's memcpy / copy_tofrom_user test into something that can live in tools/testing/selftests. It requires one turd in arch/powerpc/lib/memcpy_64.S, but it's pretty harmless IMHO. We are sailing very close to the wind with the feature macros. We define them to nothing, which currently means we get a few extra nops and include the unaligned calls. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Michael Ellerman
Benjamin Herrenschmidt
parent
55672ecfa2
commit
22d651dcef
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@ -14,7 +14,9 @@ _GLOBAL(memcpy)
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BEGIN_FTR_SECTION
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std r3,48(r1) /* save destination pointer for return value */
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FTR_SECTION_ELSE
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#ifndef SELFTEST
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b memcpy_power7
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#endif
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ALT_FTR_SECTION_END_IFCLR(CPU_FTR_VMX_COPY)
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PPC_MTOCRF(0x01,r5)
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cmpldi cr1,r5,16
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@ -13,7 +13,7 @@ CFLAGS := -Wall -O2 -flto -Wall -Werror -DGIT_VERSION='"$(GIT_VERSION)"' -I$(CUR
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export CC CFLAGS
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TARGETS = pmu
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TARGETS = pmu copyloops
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endif
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@ -0,0 +1,29 @@
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# The loops are all 64-bit code
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CFLAGS += -m64
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CFLAGS += -I$(CURDIR)
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CFLAGS += -D SELFTEST
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# Use our CFLAGS for the implicit .S rule
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ASFLAGS = $(CFLAGS)
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PROGS := copyuser_64 copyuser_power7 memcpy_64 memcpy_power7
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EXTRA_SOURCES := validate.c ../harness.c
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all: $(PROGS)
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copyuser_64: CPPFLAGS += -D COPY_LOOP=test___copy_tofrom_user_base
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copyuser_power7: CPPFLAGS += -D COPY_LOOP=test___copy_tofrom_user_power7
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memcpy_64: CPPFLAGS += -D COPY_LOOP=test_memcpy
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memcpy_power7: CPPFLAGS += -D COPY_LOOP=test_memcpy_power7
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$(PROGS): $(EXTRA_SOURCES)
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run_tests: all
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@-for PROG in $(PROGS); do \
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./$$PROG; \
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done;
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clean:
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rm -f $(PROGS) *.o
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.PHONY: all run_tests clean
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@ -0,0 +1,86 @@
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#include <ppc-asm.h>
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#define CONFIG_ALTIVEC
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#define r1 1
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#define vr0 0
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#define vr1 1
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#define vr2 2
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#define vr3 3
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#define vr4 4
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#define vr5 5
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#define vr6 6
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#define vr7 7
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#define vr8 8
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#define vr9 9
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#define vr10 10
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#define vr11 11
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#define vr12 12
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#define vr13 13
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#define vr14 14
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#define vr15 15
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#define vr16 16
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#define vr17 17
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#define vr18 18
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#define vr19 19
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#define vr20 20
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#define vr21 21
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#define vr22 22
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#define vr23 23
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#define vr24 24
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#define vr25 25
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#define vr26 26
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#define vr27 27
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#define vr28 28
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#define vr29 29
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#define vr30 30
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#define vr31 31
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#define R14 r14
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#define R15 r15
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#define R16 r16
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#define R17 r17
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#define R18 r18
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#define R19 r19
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#define R20 r20
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#define R21 r21
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#define R22 r22
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#define STACKFRAMESIZE 256
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#define STK_PARAM(i) (48 + ((i)-3)*8)
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#define STK_REG(i) (112 + ((i)-14)*8)
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#define _GLOBAL(A) FUNC_START(test_ ## A)
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#define PPC_MTOCRF(A, B) mtocrf A, B
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FUNC_START(enter_vmx_usercopy)
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li r3,1
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blr
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FUNC_START(exit_vmx_usercopy)
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li r3,0
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blr
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FUNC_START(enter_vmx_copy)
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li r3,1
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blr
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FUNC_START(exit_vmx_copy)
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blr
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FUNC_START(memcpy_power7)
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blr
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FUNC_START(__copy_tofrom_user_power7)
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blr
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FUNC_START(__copy_tofrom_user_base)
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blr
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#define BEGIN_FTR_SECTION
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#define FTR_SECTION_ELSE
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#define ALT_FTR_SECTION_END_IFCLR(x)
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#define ALT_FTR_SECTION_END(x, y)
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#define END_FTR_SECTION_IFCLR(x)
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@ -0,0 +1 @@
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../../../../../arch/powerpc/lib/copyuser_64.S
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@ -0,0 +1 @@
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../../../../../arch/powerpc/lib/copyuser_power7.S
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@ -0,0 +1 @@
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../../../../../arch/powerpc/lib/memcpy_64.S
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@ -0,0 +1 @@
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../../../../../arch/powerpc/lib/memcpy_power7.S
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@ -0,0 +1,99 @@
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#include <malloc.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdbool.h>
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#include "../utils.h"
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#define MAX_LEN 8192
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#define MAX_OFFSET 16
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#define MIN_REDZONE 128
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#define BUFLEN (MAX_LEN+MAX_OFFSET+2*MIN_REDZONE)
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#define POISON 0xa5
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unsigned long COPY_LOOP(void *to, const void *from, unsigned long size);
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static void do_one(char *src, char *dst, unsigned long src_off,
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unsigned long dst_off, unsigned long len, void *redzone,
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void *fill)
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{
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char *srcp, *dstp;
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unsigned long ret;
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unsigned long i;
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srcp = src + MIN_REDZONE + src_off;
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dstp = dst + MIN_REDZONE + dst_off;
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memset(src, POISON, BUFLEN);
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memset(dst, POISON, BUFLEN);
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memcpy(srcp, fill, len);
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ret = COPY_LOOP(dstp, srcp, len);
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if (ret && ret != (unsigned long)dstp) {
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printf("(%p,%p,%ld) returned %ld\n", dstp, srcp, len, ret);
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abort();
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}
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if (memcmp(dstp, srcp, len)) {
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printf("(%p,%p,%ld) miscompare\n", dstp, srcp, len);
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printf("src: ");
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for (i = 0; i < len; i++)
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printf("%02x ", srcp[i]);
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printf("\ndst: ");
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for (i = 0; i < len; i++)
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printf("%02x ", dstp[i]);
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printf("\n");
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abort();
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}
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if (memcmp(dst, redzone, dstp - dst)) {
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printf("(%p,%p,%ld) redzone before corrupted\n",
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dstp, srcp, len);
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abort();
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}
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if (memcmp(dstp+len, redzone, dst+BUFLEN-(dstp+len))) {
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printf("(%p,%p,%ld) redzone after corrupted\n",
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dstp, srcp, len);
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abort();
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}
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}
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int test_copy_loop(void)
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{
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char *src, *dst, *redzone, *fill;
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unsigned long len, src_off, dst_off;
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unsigned long i;
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src = memalign(BUFLEN, BUFLEN);
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dst = memalign(BUFLEN, BUFLEN);
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redzone = malloc(BUFLEN);
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fill = malloc(BUFLEN);
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if (!src || !dst || !redzone || !fill) {
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fprintf(stderr, "malloc failed\n");
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exit(1);
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}
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memset(redzone, POISON, BUFLEN);
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/* Fill with sequential bytes */
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for (i = 0; i < BUFLEN; i++)
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fill[i] = i & 0xff;
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for (len = 1; len < MAX_LEN; len++) {
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for (src_off = 0; src_off < MAX_OFFSET; src_off++) {
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for (dst_off = 0; dst_off < MAX_OFFSET; dst_off++) {
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do_one(src, dst, src_off, dst_off, len,
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redzone, fill);
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}
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}
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}
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return 0;
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}
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int main(void)
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{
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return test_harness(test_copy_loop, str(COPY_LOOP));
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}
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@ -31,4 +31,7 @@ do { \
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} \
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} while (0)
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#define _str(s) #s
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#define str(s) _str(s)
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#endif /* _SELFTESTS_POWERPC_UTILS_H */
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