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arm64: Kill detection of VPIPT i-cache policy

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Since the kernel will never run on a system with the VPIPT i-cache
policy, drop the detection code altogether.

Reviewed-by: Zenghui Yu <yuzenghui@huawei.com>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/20231204143606.1806432-3-maz@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Marc Zyngier 2023-12-04 14:36:05 +00:00 committed by Will Deacon
parent ced242ba9d
commit d8e12a0d37
2 changed files with 0 additions and 11 deletions
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6
arch/arm64/include/asm/cache.h
View File

@ -58,7 +58,6 @@ static inline unsigned int arch_slab_minalign(void)
#define CTR_L1IP(ctr) SYS_FIELD_GET(CTR_EL0, L1Ip, ctr)
#define ICACHEF_ALIASING 0
#define ICACHEF_VPIPT 1
extern unsigned long __icache_flags;
/*
@ -70,11 +69,6 @@ static inline int icache_is_aliasing(void)
return test_bit(ICACHEF_ALIASING, &__icache_flags);
}
static __always_inline int icache_is_vpipt(void)
{
return test_bit(ICACHEF_VPIPT, &__icache_flags);
}
static inline u32 cache_type_cwg(void)
{
return SYS_FIELD_GET(CTR_EL0, CWG, read_cpuid_cachetype());

5
arch/arm64/kernel/cpuinfo.c
View File

@ -36,8 +36,6 @@ static struct cpuinfo_arm64 boot_cpu_data;
static inline const char *icache_policy_str(int l1ip)
{
switch (l1ip) {
case CTR_EL0_L1Ip_VPIPT:
return "VPIPT";
case CTR_EL0_L1Ip_VIPT:
return "VIPT";
case CTR_EL0_L1Ip_PIPT:
@ -388,9 +386,6 @@ static void cpuinfo_detect_icache_policy(struct cpuinfo_arm64 *info)
switch (l1ip) {
case CTR_EL0_L1Ip_PIPT:
break;
case CTR_EL0_L1Ip_VPIPT:
set_bit(ICACHEF_VPIPT, &__icache_flags);
break;
case CTR_EL0_L1Ip_VIPT:
default:
/* Assume aliasing */