Messages in this thread |  | | Subject | Re: [PATCH RFC 07/19] perf tools: Workaround missing maps for x86_64 KPTI entry trampolines | From | Adrian Hunter <> | Date | Tue, 15 May 2018 13:40:12 +0300 |
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On 15/05/18 13:30, Jiri Olsa wrote: > On Wed, May 09, 2018 at 02:43:36PM +0300, Adrian Hunter wrote: > > SNIP > >> + >> + for (i = 0; i < ARRAY_SIZE(syms); i++) { >> + if (syms[i].addr) >> + return syms[i].addr; >> + } >> + >> + return 0; >> +} >> + >> +/* >> + * These values can be used for kernels that do not have symbols for the entry >> + * trampolines in kallsyms. >> + */ >> +#define X86_64_CPU_ENTRY_AREA_PER_CPU 0xfffffe0000000000ULL >> +#define X86_64_CPU_ENTRY_AREA_SIZE 0x2c000 >> +#define X86_64_ENTRY_TRAMPOLINE 0x6000 >> + >> +/* Map x86_64 KPTI entry trampolines */ >> +int machine__map_x86_64_entry_trampolines(struct machine *machine, >> + struct dso *kernel) >> +{ > > would it make sense to put all this under arch/x86/util/machine.c ?
In this case, machine__map_x86_64_entry_trampolines() is specific to the arch in the perf.data file, not the arch perf is currently running on.
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