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WSL2-Linux-Kernel
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x86, libnvdimm/test: Remove COPY_MC_TEST 

The COPY_MC_TEST facility has served its purpose for validating the
early termination conditions of the copy_mc_fragile() implementation.
Remove it and the EXPORT_SYMBOL_GPL of copy_mc_fragile().

Reported-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/160316688322.3374697.8648308115165836243.stgit@dwillia2-desk3.amr.corp.intel.com
This commit is contained in:
Dan Williams 2020-10-19 21:08:03 -07:00 коммит произвёл Borislav Petkov
Родитель 8d71d2bf6e
Коммит 3adb776384
5 изменённых файлов: 0 добавлений и 195 удалений
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3
arch/x86/Kconfig.debug
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@ -62,9 +62,6 @@ config EARLY_PRINTK_USB_XDBC
You should normally say N here, unless you want to debug early
crashes or need a very simple printk logging facility.
config COPY_MC_TEST
def_bool n
config EFI_PGT_DUMP
bool "Dump the EFI pagetable"
depends on EFI

75
arch/x86/include/asm/copy_mc_test.h
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@ -1,75 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _COPY_MC_TEST_H_
#define _COPY_MC_TEST_H_
#ifndef __ASSEMBLY__
#ifdef CONFIG_COPY_MC_TEST
extern unsigned long copy_mc_test_src;
extern unsigned long copy_mc_test_dst;
static inline void copy_mc_inject_src(void *addr)
{
if (addr)
copy_mc_test_src = (unsigned long) addr;
else
copy_mc_test_src = ~0UL;
}
static inline void copy_mc_inject_dst(void *addr)
{
if (addr)
copy_mc_test_dst = (unsigned long) addr;
else
copy_mc_test_dst = ~0UL;
}
#else /* CONFIG_COPY_MC_TEST */
static inline void copy_mc_inject_src(void *addr)
{
}
static inline void copy_mc_inject_dst(void *addr)
{
}
#endif /* CONFIG_COPY_MC_TEST */
#else /* __ASSEMBLY__ */
#include <asm/export.h>
#ifdef CONFIG_COPY_MC_TEST
.macro COPY_MC_TEST_CTL
.pushsection .data
.align 8
.globl copy_mc_test_src
copy_mc_test_src:
.quad 0
EXPORT_SYMBOL_GPL(copy_mc_test_src)
.globl copy_mc_test_dst
copy_mc_test_dst:
.quad 0
EXPORT_SYMBOL_GPL(copy_mc_test_dst)
.popsection
.endm
.macro COPY_MC_TEST_SRC reg count target
leaq \count(\reg), %r9
cmp copy_mc_test_src, %r9
ja \target
.endm
.macro COPY_MC_TEST_DST reg count target
leaq \count(\reg), %r9
cmp copy_mc_test_dst, %r9
ja \target
.endm
#else
.macro COPY_MC_TEST_CTL
.endm
.macro COPY_MC_TEST_SRC reg count target
.endm
.macro COPY_MC_TEST_DST reg count target
.endm
#endif /* CONFIG_COPY_MC_TEST */
#endif /* __ASSEMBLY__ */
#endif /* _COPY_MC_TEST_H_ */

4
arch/x86/lib/copy_mc.c
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@ -10,10 +10,6 @@
#include <asm/mce.h>
#ifdef CONFIG_X86_MCE
/*
* See COPY_MC_TEST for self-test of the copy_mc_fragile()
* implementation.
*/
static DEFINE_STATIC_KEY_FALSE(copy_mc_fragile_key);
void enable_copy_mc_fragile(void)

10
arch/x86/lib/copy_mc_64.S
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@ -2,14 +2,11 @@
/* Copyright(c) 2016-2020 Intel Corporation. All rights reserved. */
#include <linux/linkage.h>
#include <asm/copy_mc_test.h>
#include <asm/export.h>
#include <asm/asm.h>
#ifndef CONFIG_UML
#ifdef CONFIG_X86_MCE
COPY_MC_TEST_CTL
/*
* copy_mc_fragile - copy memory with indication if an exception / fault happened
@ -38,8 +35,6 @@ SYM_FUNC_START(copy_mc_fragile)
subl %ecx, %edx
.L_read_leading_bytes:
movb (%rsi), %al
COPY_MC_TEST_SRC %rsi 1 .E_leading_bytes
COPY_MC_TEST_DST %rdi 1 .E_leading_bytes
.L_write_leading_bytes:
movb %al, (%rdi)
incq %rsi
@ -55,8 +50,6 @@ SYM_FUNC_START(copy_mc_fragile)
.L_read_words:
movq (%rsi), %r8
COPY_MC_TEST_SRC %rsi 8 .E_read_words
COPY_MC_TEST_DST %rdi 8 .E_write_words
.L_write_words:
movq %r8, (%rdi)
addq $8, %rsi
@ -73,8 +66,6 @@ SYM_FUNC_START(copy_mc_fragile)
movl %edx, %ecx
.L_read_trailing_bytes:
movb (%rsi), %al
COPY_MC_TEST_SRC %rsi 1 .E_trailing_bytes
COPY_MC_TEST_DST %rdi 1 .E_trailing_bytes
.L_write_trailing_bytes:
movb %al, (%rdi)
incq %rsi
@ -88,7 +79,6 @@ SYM_FUNC_START(copy_mc_fragile)
.L_done:
ret
SYM_FUNC_END(copy_mc_fragile)
EXPORT_SYMBOL_GPL(copy_mc_fragile)
.section .fixup, "ax"
/*

103
tools/testing/nvdimm/test/nfit.c
Просмотреть файл

@ -23,7 +23,6 @@
#include "nfit_test.h"
#include "../watermark.h"
#include <asm/copy_mc_test.h>
#include <asm/mce.h>
/*
@ -3284,107 +3283,6 @@ static struct platform_driver nfit_test_driver = {
.id_table = nfit_test_id,
};
static char copy_mc_buf[PAGE_SIZE] __attribute__((__aligned__(PAGE_SIZE)));
enum INJECT {
INJECT_NONE,
INJECT_SRC,
INJECT_DST,
};
static void copy_mc_test_init(char *dst, char *src, size_t size)
{
size_t i;
memset(dst, 0xff, size);
for (i = 0; i < size; i++)
src[i] = (char) i;
}
static bool copy_mc_test_validate(unsigned char *dst, unsigned char *src,
size_t size, unsigned long rem)
{
size_t i;
for (i = 0; i < size - rem; i++)
if (dst[i] != (unsigned char) i) {
pr_info_once("%s:%d: offset: %zd got: %#x expect: %#x\n",
__func__, __LINE__, i, dst[i],
(unsigned char) i);
return false;
}
for (i = size - rem; i < size; i++)
if (dst[i] != 0xffU) {
pr_info_once("%s:%d: offset: %zd got: %#x expect: 0xff\n",
__func__, __LINE__, i, dst[i]);
return false;
}
return true;
}
void copy_mc_test(void)
{
char *inject_desc[] = { "none", "source", "destination" };
enum INJECT inj;
if (IS_ENABLED(CONFIG_COPY_MC_TEST)) {
pr_info("%s: run...\n", __func__);
} else {
pr_info("%s: disabled, skip.\n", __func__);
return;
}
for (inj = INJECT_NONE; inj <= INJECT_DST; inj++) {
int i;
pr_info("%s: inject: %s\n", __func__, inject_desc[inj]);
for (i = 0; i < 512; i++) {
unsigned long expect, rem;
void *src, *dst;
bool valid;
switch (inj) {
case INJECT_NONE:
copy_mc_inject_src(NULL);
copy_mc_inject_dst(NULL);
dst = &copy_mc_buf[2048];
src = &copy_mc_buf[1024 - i];
expect = 0;
break;
case INJECT_SRC:
copy_mc_inject_src(&copy_mc_buf[1024]);
copy_mc_inject_dst(NULL);
dst = &copy_mc_buf[2048];
src = &copy_mc_buf[1024 - i];
expect = 512 - i;
break;
case INJECT_DST:
copy_mc_inject_src(NULL);
copy_mc_inject_dst(&copy_mc_buf[2048]);
dst = &copy_mc_buf[2048 - i];
src = &copy_mc_buf[1024];
expect = 512 - i;
break;
}
copy_mc_test_init(dst, src, 512);
rem = copy_mc_fragile(dst, src, 512);
valid = copy_mc_test_validate(dst, src, 512, expect);
if (rem == expect && valid)
continue;
pr_info("%s: copy(%#lx, %#lx, %d) off: %d rem: %ld %s expect: %ld\n",
__func__,
((unsigned long) dst) & ~PAGE_MASK,
((unsigned long ) src) & ~PAGE_MASK,
512, i, rem, valid ? "valid" : "bad",
expect);
}
}
copy_mc_inject_src(NULL);
copy_mc_inject_dst(NULL);
}
static __init int nfit_test_init(void)
{
int rc, i;
@ -3393,7 +3291,6 @@ static __init int nfit_test_init(void)
libnvdimm_test();
acpi_nfit_test();
device_dax_test();
copy_mc_test();
dax_pmem_test();
dax_pmem_core_test();
#ifdef CONFIG_DEV_DAX_PMEM_COMPAT