diff options
| author | Paul Burton <paul.burton@mips.com> | 2019-10-01 23:04:32 +0000 |
|---|---|---|
| committer | Paul Burton <paul.burton@mips.com> | 2019-10-07 09:38:53 -0700 |
| commit | 071d2f0b5419d3cf80cc8ba73ec8fe2cedc4cc0c (patch) | |
| tree | fbeb42baaa31a9f5c6eb2869313c2e22f9c1fa85 /arch | |
| parent | 4bf841ebf17aaa0f7712623896c699b44fa92f44 (diff) | |
MIPS: r4k-bugs64: Limit R4k bug checks to affected systems
Only build the checks for R4k errata workarounds if we expect that the
kernel might actually run on a system with an R4k CPU - ie.
CONFIG_SYS_HAS_CPU_R4X00=y & we're targeting a pre-MIPSr1 ISA revision.
Rename cpu-bugs64.c to r4k-bugs64.c to indicate the fact that the code
is specific to R4k CPUs.
Signed-off-by: Paul Burton <paul.burton@mips.com>
Cc: linux-mips@vger.kernel.org
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/mips/Kconfig | 4 | ||||
| -rw-r--r-- | arch/mips/include/asm/bugs.h | 18 | ||||
| -rw-r--r-- | arch/mips/kernel/Makefile | 2 | ||||
| -rw-r--r-- | arch/mips/kernel/genex.S | 2 | ||||
| -rw-r--r-- | arch/mips/kernel/r4k-bugs64.c (renamed from arch/mips/kernel/cpu-bugs64.c) | 0 |
5 files changed, 14 insertions, 12 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index a0bd9bdb5f83..8736bf4420bc 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -2554,6 +2554,10 @@ config CPU_R4000_WORKAROUNDS config CPU_R4400_WORKAROUNDS bool +config CPU_R4X00_BUGS64 + bool + default y if SYS_HAS_CPU_R4X00 && 64BIT && (TARGET_ISA_REV < 1) + config MIPS_ASID_SHIFT int default 6 if CPU_R3000 || CPU_TX39XX diff --git a/arch/mips/include/asm/bugs.h b/arch/mips/include/asm/bugs.h index d8ab8b7129b5..d72dc6e1cf3c 100644 --- a/arch/mips/include/asm/bugs.h +++ b/arch/mips/include/asm/bugs.h @@ -26,9 +26,8 @@ extern void check_bugs64(void); static inline void check_bugs_early(void) { -#ifdef CONFIG_64BIT - check_bugs64_early(); -#endif + if (IS_ENABLED(CONFIG_CPU_R4X00_BUGS64)) + check_bugs64_early(); } static inline void check_bugs(void) @@ -37,19 +36,18 @@ static inline void check_bugs(void) cpu_data[cpu].udelay_val = loops_per_jiffy; check_bugs32(); -#ifdef CONFIG_64BIT - check_bugs64(); -#endif + + if (IS_ENABLED(CONFIG_CPU_R4X00_BUGS64)) + check_bugs64(); } static inline int r4k_daddiu_bug(void) { -#ifdef CONFIG_64BIT + if (!IS_ENABLED(CONFIG_CPU_R4X00_BUGS64)) + return 0; + WARN_ON(daddiu_bug < 0); return daddiu_bug != 0; -#else - return 0; -#endif } #endif /* _ASM_BUGS_H */ diff --git a/arch/mips/kernel/Makefile b/arch/mips/kernel/Makefile index 89b07ea8d249..d6e97df51cfb 100644 --- a/arch/mips/kernel/Makefile +++ b/arch/mips/kernel/Makefile @@ -80,7 +80,7 @@ obj-$(CONFIG_KGDB) += kgdb.o obj-$(CONFIG_PROC_FS) += proc.o obj-$(CONFIG_MAGIC_SYSRQ) += sysrq.o -obj-$(CONFIG_64BIT) += cpu-bugs64.o +obj-$(CONFIG_CPU_R4X00_BUGS64) += r4k-bugs64.o obj-$(CONFIG_I8253) += i8253.o diff --git a/arch/mips/kernel/genex.S b/arch/mips/kernel/genex.S index efde27c99414..d586cdac9605 100644 --- a/arch/mips/kernel/genex.S +++ b/arch/mips/kernel/genex.S @@ -657,7 +657,7 @@ isrdhwr: .set pop END(handle_ri_rdhwr) -#ifdef CONFIG_64BIT +#ifdef CONFIG_CPU_R4X00_BUGS64 /* A temporary overflow handler used by check_daddi(). */ __INIT diff --git a/arch/mips/kernel/cpu-bugs64.c b/arch/mips/kernel/r4k-bugs64.c index 6a7afe7ef4d3..6a7afe7ef4d3 100644 --- a/arch/mips/kernel/cpu-bugs64.c +++ b/arch/mips/kernel/r4k-bugs64.c |