It isn't entirely obvious if we're using software PAN because we
don't say anything about it in the boot log. But if we're using
hardware PAN we'll print a nice CPU feature message indicating
it. Add a print for software PAN too so we know if it's being
used or not.
Signed-off-by: Stephen Boyd <[email protected]>
---
arch/arm64/kernel/cpufeature.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
index 21e2c95d24e7..c6f8da17146b 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c
@@ -1189,6 +1189,9 @@ void __init setup_cpu_features(void)
if (system_supports_32bit_el0())
setup_elf_hwcaps(compat_elf_hwcaps);
+ if (system_uses_ttbr0_pan())
+ pr_info("Emulating Privileged Access Never (PAN) using TTBR0_EL1 switching\n");
+
/* Advertise that we have computed the system capabilities */
set_sys_caps_initialised();
--
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a Linux Foundation Collaborative Project
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