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author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-01-31 03:11:50 +0300 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-01-31 03:11:50 +0300 |
commit | ccaaaf6fe5a5e1fffca5cca0f3fc4ec84d7ae752 (patch) | |
tree | b6a7b69244445d0c4c4b3090e3c4a0e0a9617fba /arch/x86/include/asm/trace | |
parent | 35c222fd323629cf2e834eb8aff77058856ffdda (diff) | |
parent | 45fc24e89b7cc2e227b2f03d99dda0a2204bf383 (diff) | |
download | linux-ccaaaf6fe5a5e1fffca5cca0f3fc4ec84d7ae752.tar.xz |
Merge tag 'mpx-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/daveh/x86-mpx
Pull x86 MPX removal from Dave Hansen:
"MPX requires recompiling applications, which requires compiler
support. Unfortunately, GCC 9.1 is expected to be be released without
support for MPX. This means that there was only a relatively small
window where folks could have ever used MPX. It failed to gain wide
adoption in the industry, and Linux was the only mainstream OS to ever
support it widely.
Support for the feature may also disappear on future processors.
This set completes the process that we started during the 5.4 merge
window when the MPX prctl()s were removed. XSAVE support is left in
place, which allows MPX-using KVM guests to continue to function"
* tag 'mpx-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/daveh/x86-mpx:
x86/mpx: remove MPX from arch/x86
mm: remove arch_bprm_mm_init() hook
x86/mpx: remove bounds exception code
x86/mpx: remove build infrastructure
x86/alternatives: add missing insn.h include
Diffstat (limited to 'arch/x86/include/asm/trace')
-rw-r--r-- | arch/x86/include/asm/trace/mpx.h | 134 |
1 files changed, 0 insertions, 134 deletions
diff --git a/arch/x86/include/asm/trace/mpx.h b/arch/x86/include/asm/trace/mpx.h deleted file mode 100644 index 54133017267c..000000000000 --- a/arch/x86/include/asm/trace/mpx.h +++ /dev/null @@ -1,134 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -#undef TRACE_SYSTEM -#define TRACE_SYSTEM mpx - -#if !defined(_TRACE_MPX_H) || defined(TRACE_HEADER_MULTI_READ) -#define _TRACE_MPX_H - -#include <linux/tracepoint.h> - -#ifdef CONFIG_X86_INTEL_MPX - -TRACE_EVENT(mpx_bounds_register_exception, - - TP_PROTO(void __user *addr_referenced, - const struct mpx_bndreg *bndreg), - TP_ARGS(addr_referenced, bndreg), - - TP_STRUCT__entry( - __field(void __user *, addr_referenced) - __field(u64, lower_bound) - __field(u64, upper_bound) - ), - - TP_fast_assign( - __entry->addr_referenced = addr_referenced; - __entry->lower_bound = bndreg->lower_bound; - __entry->upper_bound = bndreg->upper_bound; - ), - /* - * Note that we are printing out the '~' of the upper - * bounds register here. It is actually stored in its - * one's complement form so that its 'init' state - * corresponds to all 0's. But, that looks like - * gibberish when printed out, so print out the 1's - * complement instead of the actual value here. Note - * though that you still need to specify filters for the - * actual value, not the displayed one. - */ - TP_printk("address referenced: 0x%p bounds: lower: 0x%llx ~upper: 0x%llx", - __entry->addr_referenced, - __entry->lower_bound, - ~__entry->upper_bound - ) -); - -TRACE_EVENT(bounds_exception_mpx, - - TP_PROTO(const struct mpx_bndcsr *bndcsr), - TP_ARGS(bndcsr), - - TP_STRUCT__entry( - __field(u64, bndcfgu) - __field(u64, bndstatus) - ), - - TP_fast_assign( - /* need to get rid of the 'const' on bndcsr */ - __entry->bndcfgu = (u64)bndcsr->bndcfgu; - __entry->bndstatus = (u64)bndcsr->bndstatus; - ), - - TP_printk("bndcfgu:0x%llx bndstatus:0x%llx", - __entry->bndcfgu, - __entry->bndstatus) -); - -DECLARE_EVENT_CLASS(mpx_range_trace, - - TP_PROTO(unsigned long start, - unsigned long end), - TP_ARGS(start, end), - - TP_STRUCT__entry( - __field(unsigned long, start) - __field(unsigned long, end) - ), - - TP_fast_assign( - __entry->start = start; - __entry->end = end; - ), - - TP_printk("[0x%p:0x%p]", - (void *)__entry->start, - (void *)__entry->end - ) -); - -DEFINE_EVENT(mpx_range_trace, mpx_unmap_zap, - TP_PROTO(unsigned long start, unsigned long end), - TP_ARGS(start, end) -); - -DEFINE_EVENT(mpx_range_trace, mpx_unmap_search, - TP_PROTO(unsigned long start, unsigned long end), - TP_ARGS(start, end) -); - -TRACE_EVENT(mpx_new_bounds_table, - - TP_PROTO(unsigned long table_vaddr), - TP_ARGS(table_vaddr), - - TP_STRUCT__entry( - __field(unsigned long, table_vaddr) - ), - - TP_fast_assign( - __entry->table_vaddr = table_vaddr; - ), - - TP_printk("table vaddr:%p", (void *)__entry->table_vaddr) -); - -#else - -/* - * This gets used outside of MPX-specific code, so we need a stub. - */ -static inline -void trace_bounds_exception_mpx(const struct mpx_bndcsr *bndcsr) -{ -} - -#endif /* CONFIG_X86_INTEL_MPX */ - -#undef TRACE_INCLUDE_PATH -#define TRACE_INCLUDE_PATH asm/trace/ -#undef TRACE_INCLUDE_FILE -#define TRACE_INCLUDE_FILE mpx -#endif /* _TRACE_MPX_H */ - -/* This part must be outside protection */ -#include <trace/define_trace.h> |