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 <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: [email protected] Cc: "H. Peter Anvin" <[email protected]> Cc: Vishal Verma <[email protected]> Cc: Dave Jiang <[email protected]> Cc: Ira Weiny <[email protected]> Signed-off-by: Dan Williams <[email protected]> --- arch/x86/Kconfig.debug | 3 - arch/x86/include/asm/copy_mc_test.h | 75 ------------------------- arch/x86/lib/copy_mc.c | 4 - arch/x86/lib/copy_mc_64.S | 10 --- tools/testing/nvdimm/test/nfit.c | 103 ----------------------------------- 5 files changed, 195 deletions(-) delete mode 100644 arch/x86/include/asm/copy_mc_test.h diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug index 27b5e2bc6a01..80b57e7f4947 100644 --- a/arch/x86/Kconfig.debug +++ b/arch/x86/Kconfig.debug @@ -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 diff --git a/arch/x86/include/asm/copy_mc_test.h b/arch/x86/include/asm/copy_mc_test.h deleted file mode 100644 index e4991ba96726..000000000000 --- a/arch/x86/include/asm/copy_mc_test.h +++ /dev/null @@ -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_ */ diff --git a/arch/x86/lib/copy_mc.c b/arch/x86/lib/copy_mc.c index c13e8c9ee926..80efd45a7761 100644 --- a/arch/x86/lib/copy_mc.c +++ b/arch/x86/lib/copy_mc.c @@ -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) diff --git a/arch/x86/lib/copy_mc_64.S b/arch/x86/lib/copy_mc_64.S index 892d8915f609..e5f77e293034 100644 --- a/arch/x86/lib/copy_mc_64.S +++ b/arch/x86/lib/copy_mc_64.S @@ -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" /* diff --git a/tools/testing/nvdimm/test/nfit.c b/tools/testing/nvdimm/test/nfit.c index 2ac0fff6dad8..9b185bf82da8 100644 --- a/tools/testing/nvdimm/test/nfit.c +++ b/tools/testing/nvdimm/test/nfit.c @@ -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 = ©_mc_buf[2048]; - src = ©_mc_buf[1024 - i]; - expect = 0; - break; - case INJECT_SRC: - copy_mc_inject_src(©_mc_buf[1024]); - copy_mc_inject_dst(NULL); - dst = ©_mc_buf[2048]; - src = ©_mc_buf[1024 - i]; - expect = 512 - i; - break; - case INJECT_DST: - copy_mc_inject_src(NULL); - copy_mc_inject_dst(©_mc_buf[2048]); - dst = ©_mc_buf[2048 - i]; - src = ©_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
