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arm64: restrict effects of ARMV7_COMPAT_CPUINFO to ARMv7 tasks

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Since ARMV7_COMPAT_CPUINFO only exists to support existing ARMv7
binaries, restrict its effects to compat tasks

Bug: 16819658

Change-Id: I1092de596c7822d23f5f3f8a05b417a3cb49f593
Signed-off-by: Greg Hackmann <ghackmann@google.com>
This commit is contained in:
Greg Hackmann
2014-08-05 16:14:27 -07:00
parent 779a6cf48c
commit 3868e7f8d4
1 changed files with 10 additions and 4 deletions
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14
arch/arm64/kernel/setup.c
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@@ -421,13 +421,19 @@ static int c_show(struct seq_file *m, void *v)
if (elf_hwcap & (1 << i))
seq_printf(m, "%s ", hwcap_str[i]);
#ifdef CONFIG_ARMV7_COMPAT_CPUINFO
/* Print out the non-optional ARMv8 HW capabilities */
seq_printf(m, "wp half thumb fastmult vfp edsp neon vfpv3 tlsi ");
seq_printf(m, "vfpv4 idiva idivt ");
if (is_compat_task()) {
/* Print out the non-optional ARMv8 HW capabilities */
seq_printf(m, "wp half thumb fastmult vfp edsp neon vfpv3 tlsi ");
seq_printf(m, "vfpv4 idiva idivt ");
}
#endif
seq_printf(m, "\nCPU implementer\t: 0x%02x\n", read_cpuid_id() >> 24);
seq_printf(m, "CPU architecture: 8\n");
seq_printf(m, "CPU architecture: %s\n",
#if IS_ENABLED(CONFIG_ARMV7_COMPAT_CPUINFO)
is_compat_task() ? "8" :
#endif
"AArch64");
seq_printf(m, "CPU variant\t: 0x%x\n", (read_cpuid_id() >> 20) & 15);
seq_printf(m, "CPU part\t: 0x%03x\n", (read_cpuid_id() >> 4) & 0xfff);
seq_printf(m, "CPU revision\t: %d\n", read_cpuid_id() & 15);