mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-17 23:26:43 +07:00
6a6efbb45b
CPU Errata work arounds are detected and applied to the kernel code at boot time and the data is then freed up. If a new hotplugged CPU requires a work around which was not applied at boot time, there is nothing we can do but simply fail the booting. Cc: Will Deacon <will.deacon@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Andre Przywara <andre.przywara@arm.com> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
130 lines
3.5 KiB
C
130 lines
3.5 KiB
C
/*
|
|
* Contains CPU specific errata definitions
|
|
*
|
|
* Copyright (C) 2014 ARM Ltd.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <linux/types.h>
|
|
#include <asm/cpu.h>
|
|
#include <asm/cputype.h>
|
|
#include <asm/cpufeature.h>
|
|
|
|
static bool __maybe_unused
|
|
is_affected_midr_range(const struct arm64_cpu_capabilities *entry, int scope)
|
|
{
|
|
WARN_ON(scope != SCOPE_LOCAL_CPU || preemptible());
|
|
return MIDR_IS_CPU_MODEL_RANGE(read_cpuid_id(), entry->midr_model,
|
|
entry->midr_range_min,
|
|
entry->midr_range_max);
|
|
}
|
|
|
|
#define MIDR_RANGE(model, min, max) \
|
|
.def_scope = SCOPE_LOCAL_CPU, \
|
|
.matches = is_affected_midr_range, \
|
|
.midr_model = model, \
|
|
.midr_range_min = min, \
|
|
.midr_range_max = max
|
|
|
|
const struct arm64_cpu_capabilities arm64_errata[] = {
|
|
#if defined(CONFIG_ARM64_ERRATUM_826319) || \
|
|
defined(CONFIG_ARM64_ERRATUM_827319) || \
|
|
defined(CONFIG_ARM64_ERRATUM_824069)
|
|
{
|
|
/* Cortex-A53 r0p[012] */
|
|
.desc = "ARM errata 826319, 827319, 824069",
|
|
.capability = ARM64_WORKAROUND_CLEAN_CACHE,
|
|
MIDR_RANGE(MIDR_CORTEX_A53, 0x00, 0x02),
|
|
},
|
|
#endif
|
|
#ifdef CONFIG_ARM64_ERRATUM_819472
|
|
{
|
|
/* Cortex-A53 r0p[01] */
|
|
.desc = "ARM errata 819472",
|
|
.capability = ARM64_WORKAROUND_CLEAN_CACHE,
|
|
MIDR_RANGE(MIDR_CORTEX_A53, 0x00, 0x01),
|
|
},
|
|
#endif
|
|
#ifdef CONFIG_ARM64_ERRATUM_832075
|
|
{
|
|
/* Cortex-A57 r0p0 - r1p2 */
|
|
.desc = "ARM erratum 832075",
|
|
.capability = ARM64_WORKAROUND_DEVICE_LOAD_ACQUIRE,
|
|
MIDR_RANGE(MIDR_CORTEX_A57, 0x00,
|
|
(1 << MIDR_VARIANT_SHIFT) | 2),
|
|
},
|
|
#endif
|
|
#ifdef CONFIG_ARM64_ERRATUM_834220
|
|
{
|
|
/* Cortex-A57 r0p0 - r1p2 */
|
|
.desc = "ARM erratum 834220",
|
|
.capability = ARM64_WORKAROUND_834220,
|
|
MIDR_RANGE(MIDR_CORTEX_A57, 0x00,
|
|
(1 << MIDR_VARIANT_SHIFT) | 2),
|
|
},
|
|
#endif
|
|
#ifdef CONFIG_ARM64_ERRATUM_845719
|
|
{
|
|
/* Cortex-A53 r0p[01234] */
|
|
.desc = "ARM erratum 845719",
|
|
.capability = ARM64_WORKAROUND_845719,
|
|
MIDR_RANGE(MIDR_CORTEX_A53, 0x00, 0x04),
|
|
},
|
|
#endif
|
|
#ifdef CONFIG_CAVIUM_ERRATUM_23154
|
|
{
|
|
/* Cavium ThunderX, pass 1.x */
|
|
.desc = "Cavium erratum 23154",
|
|
.capability = ARM64_WORKAROUND_CAVIUM_23154,
|
|
MIDR_RANGE(MIDR_THUNDERX, 0x00, 0x01),
|
|
},
|
|
#endif
|
|
#ifdef CONFIG_CAVIUM_ERRATUM_27456
|
|
{
|
|
/* Cavium ThunderX, T88 pass 1.x - 2.1 */
|
|
.desc = "Cavium erratum 27456",
|
|
.capability = ARM64_WORKAROUND_CAVIUM_27456,
|
|
MIDR_RANGE(MIDR_THUNDERX, 0x00,
|
|
(1 << MIDR_VARIANT_SHIFT) | 1),
|
|
},
|
|
#endif
|
|
{
|
|
}
|
|
};
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
void verify_local_cpu_errata(void)
|
|
{
|
|
const struct arm64_cpu_capabilities *caps = arm64_errata;
|
|
|
|
for (; caps->matches; caps++)
|
|
if (!cpus_have_cap(caps->capability) &&
|
|
caps->matches(caps, SCOPE_LOCAL_CPU)) {
|
|
pr_crit("CPU%d: Requires work around for %s, not detected"
|
|
" at boot time\n",
|
|
smp_processor_id(),
|
|
caps->desc ? : "an erratum");
|
|
cpu_die_early();
|
|
}
|
|
}
|
|
|
|
void check_local_cpu_errata(void)
|
|
{
|
|
update_cpu_capabilities(arm64_errata, "enabling workaround for");
|
|
}
|