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| author |   Eugeniy Paltsev <eugeniy.paltsev@synopsys.com> | 2019-01-30 19:32:41 +0300 |
|---|---|---|
| committer |   Vineet Gupta <vgupta@synopsys.com> | 2019-02-25 12:10:58 -0800 |
| commit | 76551468833cd5c356b1d9ff4bc9393fcf768a59 (patch) | |
| tree | 8e2552cc13389bc3c90c916b0342bfac7f3a90b1 /arch/arc/kernel/troubleshoot.c | |
| parent | ARCv2: lib: introduce memcpy optimized for unaligned access (diff) | |
| download | linux-dev-76551468833cd5c356b1d9ff4bc9393fcf768a59.tar.xz linux-dev-76551468833cd5c356b1d9ff4bc9393fcf768a59.zip | |
ARCv2: Add explcit unaligned access support (and ability to disable too)
As of today we enable unaligned access unconditionally on ARCv2.
Do this under a Kconfig option to allow disable it for test, benchmarking
etc. Also while at it
- Select HAVE_EFFICIENT_UNALIGNED_ACCESS
- Although gcc defaults to unaligned access (since GNU 2018.03), add the
right toggles for enabling or disabling as appropriate
- update bootlog to prints both HW feature status (exists, enabled/disabled)
and SW status (used / not used).
- wire up the relaxed memcpy for unaligned access
Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
[vgupta: squashed patches, handle gcc -mno-unaligned-access quick]
Diffstat (limited to 'arch/arc/kernel/troubleshoot.c')
| -rw-r--r-- | arch/arc/kernel/troubleshoot.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/arc/kernel/troubleshoot.c b/arch/arc/kernel/troubleshoot.c index 215f515442e0..b0aa8c028331 100644 --- a/arch/arc/kernel/troubleshoot.c +++ b/arch/arc/kernel/troubleshoot.c @@ -145,7 +145,8 @@ static void show_ecr_verbose(struct pt_regs *regs) } else if (vec == ECR_V_PROTV) { if (cause_code == ECR_C_PROTV_INST_FETCH) pr_cont("Execute from Non-exec Page\n"); - else if (cause_code == ECR_C_PROTV_MISALIG_DATA) + else if (cause_code == ECR_C_PROTV_MISALIG_DATA && + IS_ENABLED(CONFIG_ISA_ARCOMPACT)) pr_cont("Misaligned r/w from 0x%08lx\n", address); else pr_cont("%s access not allowed on page\n", @@ -161,6 +162,8 @@ static void show_ecr_verbose(struct pt_regs *regs) pr_cont("Bus Error from Data Mem\n"); else pr_cont("Bus Error, check PRM\n"); + } else if (vec == ECR_V_MISALIGN) { + pr_cont("Misaligned r/w from 0x%08lx\n", address); #endif } else if (vec == ECR_V_TRAP) { if (regs->ecr_param == 5) |