linux-kernel - vmlinux.o: warning: objtool: xen_set_debugreg()+0x0: call to HYPERVISOR_set

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Date:   Thu, 25 Nov 2021 16:48:58 +0800
From:   kernel test robot <lkp@...el.com>
To:     Juergen Gross <jgross@...e.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>
Subject: vmlinux.o: warning: objtool: xen_set_debugreg()+0x0: call to
 HYPERVISOR_set_debugreg() leaves .noinstr.text section

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   5f53fa508db098c9d372423a6dac31c8a5679cdf
commit: ee1f9d19143257da999fcdc86eda7bd386f4907e xen: allow pv-only hypercalls only with CONFIG_XEN_PV
date:   3 weeks ago
config: x86_64-buildonly-randconfig-r005-20211125 (https://download.01.org/0day-ci/archive/20211125/202111251636.gfkDX2NO-lkp@intel.com/config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ee1f9d19143257da999fcdc86eda7bd386f4907e
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout ee1f9d19143257da999fcdc86eda7bd386f4907e
        # save the config file to linux build tree
        mkdir build_dir
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

>> vmlinux.o: warning: objtool: xen_set_debugreg()+0x0: call to HYPERVISOR_set_debugreg() leaves .noinstr.text section
>> vmlinux.o: warning: objtool: xen_get_debugreg()+0x0: call to HYPERVISOR_get_debugreg() leaves .noinstr.text section
   vmlinux.o: warning: objtool: __wrgsbase_inactive()+0x28: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: __rdgsbase_inactive()+0x24: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: fixup_bad_iret()+0x71: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: noist_exc_debug()+0x58: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: exc_nmi()+0xcf: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: poke_int3_handler()+0x3e: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: mce_check_crashing_cpu()+0xd: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: mce_setup()+0xb: call to memset() leaves .noinstr.text section
   vmlinux.o: warning: objtool: do_machine_check()+0x3b: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: exc_machine_check()+0x5b: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: exc_page_fault()+0x35: call to static_key_count() leaves .noinstr.text section
   vmlinux.o: warning: objtool: rcu_dynticks_eqs_enter()+0x1e: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: rcu_dynticks_eqs_exit()+0x1f: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: rcu_eqs_exit.constprop.0()+0x2a: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: rcu_eqs_enter.constprop.0()+0x2b: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: rcu_irq_exit()+0x24: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: rcu_nmi_enter()+0x1d: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: rcu_irq_enter()+0x24: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: irqentry_nmi_enter()+0x45: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: irqentry_nmi_exit()+0x41: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: enter_from_user_mode()+0x38: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: syscall_enter_from_user_mode()+0x3d: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: syscall_enter_from_user_mode_prepare()+0x38: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: irqentry_enter_from_user_mode()+0x38: call to ftrace_likely_update() leaves .noinstr.text section
   vmlinux.o: warning: objtool: irqentry_exit()+0x2b: call to ftrace_likely_update() leaves .noinstr.text section

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org