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arm64: capabilities: Prepare for grouping features and errata work arounds

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We are about to group the handling of all capabilities (features
and errata workarounds). This patch open codes the wrapper routines
to make it easier to merge the handling.

Reviewed-by: Dave Martin <dave.martin@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Suzuki K Poulose 2018-03-26 15:12:35 +01:00 committed by Will Deacon
parent cce360b54c
commit 600b9c919c
1 changed files with 18 additions and 40 deletions
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58
arch/arm64/kernel/cpufeature.c
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@ -510,7 +510,8 @@ static void __init init_cpu_ftr_reg(u32 sys_reg, u64 new)
}
extern const struct arm64_cpu_capabilities arm64_errata[];
static void update_cpu_errata_workarounds(void);
static void update_cpu_capabilities(const struct arm64_cpu_capabilities *caps,
u16 scope_mask, const char *info);
void __init init_cpu_features(struct cpuinfo_arm64 *info)
{
@ -559,7 +560,8 @@ void __init init_cpu_features(struct cpuinfo_arm64 *info)
* Run the errata work around checks on the boot CPU, once we have
* initialised the cpu feature infrastructure.
*/
update_cpu_errata_workarounds();
update_cpu_capabilities(arm64_errata, SCOPE_ALL,
"enabling workaround for");
}
static void update_cpu_ftr_reg(struct arm64_ftr_reg *reg, u64 new)
@ -1389,12 +1391,6 @@ verify_local_elf_hwcaps(const struct arm64_cpu_capabilities *caps)
}
}
static void verify_local_cpu_features(void)
{
if (!__verify_local_cpu_caps(arm64_features, SCOPE_ALL))
cpu_die_early();
}
static void verify_sve_features(void)
{
u64 safe_zcr = read_sanitised_ftr_reg(SYS_ZCR_EL1);
@ -1412,27 +1408,6 @@ static void verify_sve_features(void)
/* Add checks on other ZCR bits here if necessary */
}
/*
* The CPU Errata work arounds are detected and applied at boot time
* and the related information is freed soon after. If the new CPU requires
* an errata not detected at boot, fail this CPU.
*/
static void verify_local_cpu_errata_workarounds(void)
{
if (!__verify_local_cpu_caps(arm64_errata, SCOPE_ALL))
cpu_die_early();
}
static void update_cpu_errata_workarounds(void)
{
update_cpu_capabilities(arm64_errata, SCOPE_ALL,
"enabling workaround for");
}
static void __init enable_errata_workarounds(void)
{
enable_cpu_capabilities(arm64_errata, SCOPE_ALL);
}
/*
* Run through the enabled system capabilities and enable() it on this CPU.
@ -1444,8 +1419,15 @@ static void __init enable_errata_workarounds(void)
*/
static void verify_local_cpu_capabilities(void)
{
verify_local_cpu_errata_workarounds();
verify_local_cpu_features();
/*
* The CPU Errata work arounds are detected and applied at boot time
* and the related information is freed soon after. If the new CPU
* requires an errata not detected at boot, fail this CPU.
*/
if (!__verify_local_cpu_caps(arm64_errata, SCOPE_ALL))
cpu_die_early();
if (!__verify_local_cpu_caps(arm64_features, SCOPE_ALL))
cpu_die_early();
verify_local_elf_hwcaps(arm64_elf_hwcaps);
if (system_supports_32bit_el0())
@ -1470,17 +1452,12 @@ void check_local_cpu_capabilities(void)
* advertised capabilities.
*/
if (!sys_caps_initialised)
update_cpu_errata_workarounds();
update_cpu_capabilities(arm64_errata, SCOPE_ALL,
"enabling workaround for");
else
verify_local_cpu_capabilities();
}
static void __init setup_feature_capabilities(void)
{
update_cpu_capabilities(arm64_features, SCOPE_ALL, "detected:");
enable_cpu_capabilities(arm64_features, SCOPE_ALL);
}
DEFINE_STATIC_KEY_FALSE(arm64_const_caps_ready);
EXPORT_SYMBOL(arm64_const_caps_ready);
@ -1502,8 +1479,9 @@ void __init setup_cpu_features(void)
u32 cwg;
/* Set the CPU feature capabilies */
setup_feature_capabilities();
enable_errata_workarounds();
update_cpu_capabilities(arm64_features, SCOPE_ALL, "detected:");
enable_cpu_capabilities(arm64_features, SCOPE_ALL);
enable_cpu_capabilities(arm64_errata, SCOPE_ALL);
mark_const_caps_ready();
setup_elf_hwcaps(arm64_elf_hwcaps);