3c9450c053
Compilation error:
arch/powerpc/perf/perf_regs.c:80:undefined reference to `.is_sier_available'
Currently is_sier_available() is part of core-book3s.c, which is added
to build based on CONFIG_PPC_PERF_CTRS.
A config with CONFIG_PERF_EVENTS and without CONFIG_PPC_PERF_CTRS will
have a build break because of missing is_sier_available().
In practice it only breaks when CONFIG_FSL_EMB_PERF_EVENT=n because
that also guards the usage of is_sier_available(). That only happens
with CONFIG_PPC_BOOK3E_64=y and CONFIG_FSL_SOC_BOOKE=n.
Patch adds is_sier_available() in asm/perf_event.h to fix the build
break for configs missing CONFIG_PPC_PERF_CTRS.
Fixes: 333804dc3b7a ("powerpc/perf: Update perf_regs structure to include SIER")
Reported-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
[mpe: Add detail about CONFIG_FSL_SOC_BOOKE]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200614083604.302611-1-maddy@linux.ibm.com
44 lines
1.2 KiB
C
44 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Performance event support - hardware-specific disambiguation
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*
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* For now this is a compile-time decision, but eventually it should be
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* runtime. This would allow multiplatform perf event support for e300 (fsl
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* embedded perf counters) plus server/classic, and would accommodate
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* devices other than the core which provide their own performance counters.
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*
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* Copyright 2010 Freescale Semiconductor, Inc.
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*/
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#ifdef CONFIG_PPC_PERF_CTRS
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#include <asm/perf_event_server.h>
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#else
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static inline bool is_sier_available(void) { return false; }
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#endif
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#ifdef CONFIG_FSL_EMB_PERF_EVENT
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#include <asm/perf_event_fsl_emb.h>
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#endif
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#ifdef CONFIG_PERF_EVENTS
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#include <asm/ptrace.h>
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#include <asm/reg.h>
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#define perf_arch_bpf_user_pt_regs(regs) ®s->user_regs
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/*
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* Overload regs->result to specify whether we should use the MSR (result
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* is zero) or the SIAR (result is non zero).
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*/
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#define perf_arch_fetch_caller_regs(regs, __ip) \
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do { \
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(regs)->result = 0; \
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(regs)->nip = __ip; \
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(regs)->gpr[1] = current_stack_frame(); \
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asm volatile("mfmsr %0" : "=r" ((regs)->msr)); \
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} while (0)
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/* To support perf_regs sier update */
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extern bool is_sier_available(void);
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#endif
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