diff options
| -rw-r--r-- | sys/arch/arm64/arm64/cpu.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/sys/arch/arm64/arm64/cpu.c b/sys/arch/arm64/arm64/cpu.c index e24e8518702..dc65e10a011 100644 --- a/sys/arch/arm64/arm64/cpu.c +++ b/sys/arch/arm64/arm64/cpu.c @@ -1,4 +1,4 @@ -/* $OpenBSD: cpu.c,v 1.46 2021/01/29 08:48:19 jsg Exp $ */ +/* $OpenBSD: cpu.c,v 1.47 2021/02/10 20:51:27 kettenis Exp $ */ /* * Copyright (c) 2016 Dale Rahn <drahn@dalerahn.com> @@ -242,6 +242,7 @@ cpu_identify(struct cpu_info *ci) if (clidr & CLIDR_CTYPE_INSN) { WRITE_SPECIALREG(csselr_el1, i << CSSELR_LEVEL_SHIFT | CSSELR_IND); + __asm volatile("isb"); ccsidr = READ_SPECIALREG(ccsidr_el1); sets = CCSIDR_SETS(ccsidr); ways = CCSIDR_WAYS(ccsidr); @@ -254,6 +255,7 @@ cpu_identify(struct cpu_info *ci) } if (clidr & CLIDR_CTYPE_DATA) { WRITE_SPECIALREG(csselr_el1, i << CSSELR_LEVEL_SHIFT); + __asm volatile("isb"); ccsidr = READ_SPECIALREG(ccsidr_el1); sets = CCSIDR_SETS(ccsidr); ways = CCSIDR_WAYS(ccsidr); @@ -264,6 +266,7 @@ cpu_identify(struct cpu_info *ci) } if (clidr & CLIDR_CTYPE_UNIFIED) { WRITE_SPECIALREG(csselr_el1, i << CSSELR_LEVEL_SHIFT); + __asm volatile("isb"); ccsidr = READ_SPECIALREG(ccsidr_el1); sets = CCSIDR_SETS(ccsidr); ways = CCSIDR_WAYS(ccsidr); |