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arm64: cache: Identify VPIPT I-caches

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Add support for detecting VPIPT I-caches, as introduced by ARMv8.2.

Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Will Deacon
2017-03-10 20:32:24 +00:00
committed by Catalin Marinas
parent 02f7760e6e
commit dda288d7e4
2 changed files with 11 additions and 0 deletions
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4
arch/arm64/kernel/cpuinfo.c
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@@ -46,6 +46,7 @@ static char *icache_policy_str[] = {
[0 ... ICACHE_POLICY_PIPT] = "RESERVED/UNKNOWN",
[ICACHE_POLICY_VIPT] = "VIPT",
[ICACHE_POLICY_PIPT] = "PIPT",
[ICACHE_POLICY_VPIPT] = "VPIPT",
};
unsigned long __icache_flags;
@@ -291,6 +292,9 @@ static void cpuinfo_detect_icache_policy(struct cpuinfo_arm64 *info)
switch (l1ip) {
case ICACHE_POLICY_PIPT:
break;
case ICACHE_POLICY_VPIPT:
set_bit(ICACHEF_VPIPT, &__icache_flags);
break;
default:
/* Fallthrough */
case ICACHE_POLICY_VIPT: