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MIPS: Convert R10000_LLSC_WAR info a config option

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Use a new config option to enabel R1000_LLSC workaound and remove
define from different war.h files.

Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
This commit is contained in:
Thomas Bogendoerfer 2020-08-24 18:32:49 +02:00
parent 886ee1363a
commit 256ec489f1
19 changed files with 15 additions and 31 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
arch/mips/Kconfig
View File

@ -669,6 +669,7 @@ config SGI_IP27
select SYS_SUPPORTS_BIG_ENDIAN
select SYS_SUPPORTS_NUMA
select SYS_SUPPORTS_SMP
select WAR_R10000_LLSC
select MIPS_L1_CACHE_SHIFT_7
select NUMA
help
@ -704,6 +705,7 @@ config SGI_IP28
select SYS_HAS_EARLY_PRINTK
select SYS_SUPPORTS_64BIT_KERNEL
select SYS_SUPPORTS_BIG_ENDIAN
select WAR_R10000_LLSC
select MIPS_L1_CACHE_SHIFT_7
help
This is the SGI Indigo2 with R10000 processor. To compile a Linux
@ -730,6 +732,7 @@ config SGI_IP30
select SYS_SUPPORTS_64BIT_KERNEL
select SYS_SUPPORTS_BIG_ENDIAN
select SYS_SUPPORTS_SMP
select WAR_R10000_LLSC
select MIPS_L1_CACHE_SHIFT_7
select ARC_MEMORY
help
@ -2675,6 +2678,11 @@ config WAR_TX49XX_ICACHE_INDEX_INV
config WAR_ICACHE_REFILLS
bool
# On the R10000 up to version 2.6 (not sure about 2.7) there is a bug that
# may cause ll / sc and lld / scd sequences to execute non-atomically.
config WAR_R10000_LLSC
bool
#
# - Highmem only makes sense for the 32-bit kernel.
# - The current highmem code will only work properly on physically indexed

4
arch/mips/include/asm/futex.h
View File

@ -21,7 +21,7 @@
#define __futex_atomic_op(insn, ret, oldval, uaddr, oparg) \
{ \
if (cpu_has_llsc && R10000_LLSC_WAR) { \
if (cpu_has_llsc && IS_ENABLED(CONFIG_WAR_R10000_LLSC)) { \
__asm__ __volatile__( \
" .set push \n" \
" .set noat \n" \
@ -133,7 +133,7 @@ futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr,
if (!access_ok(uaddr, sizeof(u32)))
return -EFAULT;
if (cpu_has_llsc && R10000_LLSC_WAR) {
if (cpu_has_llsc && IS_ENABLED(CONFIG_WAR_R10000_LLSC)) {
__asm__ __volatile__(
"# futex_atomic_cmpxchg_inatomic \n"
" .set push \n"

2
arch/mips/include/asm/llsc.h
View File

@ -28,7 +28,7 @@
* works around a bug present in R10000 CPUs prior to revision 3.0 that could
* cause ll-sc sequences to execute non-atomically.
*/
#if R10000_LLSC_WAR
#ifdef CONFIG_WAR_R10000_LLSC
# define __SC_BEQZ "beqzl "
#elif MIPS_ISA_REV >= 6
# define __SC_BEQZ "beqzc "

4
arch/mips/include/asm/local.h
View File

@ -31,7 +31,7 @@ static __inline__ long local_add_return(long i, local_t * l)
{
unsigned long result;
if (kernel_uses_llsc && R10000_LLSC_WAR) {
if (kernel_uses_llsc && IS_ENABLED(CONFIG_WAR_R10000_LLSC)) {
unsigned long temp;
__asm__ __volatile__(
@ -80,7 +80,7 @@ static __inline__ long local_sub_return(long i, local_t * l)
{
unsigned long result;
if (kernel_uses_llsc && R10000_LLSC_WAR) {
if (kernel_uses_llsc && IS_ENABLED(CONFIG_WAR_R10000_LLSC)) {
unsigned long temp;
__asm__ __volatile__(

1
arch/mips/include/asm/mach-cavium-octeon/war.h
View File

@ -11,7 +11,6 @@
#define BCM1250_M3_WAR 0
#define SIBYTE_1956_WAR 0
#define R10000_LLSC_WAR 0
#define MIPS34K_MISSED_ITLB_WAR 0
#define CAVIUM_OCTEON_DCACHE_PREFETCH_WAR \

1
arch/mips/include/asm/mach-generic/war.h
View File

@ -10,7 +10,6 @@
#define BCM1250_M3_WAR 0
#define SIBYTE_1956_WAR 0
#define R10000_LLSC_WAR 0
#define MIPS34K_MISSED_ITLB_WAR 0
#endif /* __ASM_MACH_GENERIC_WAR_H */

1
arch/mips/include/asm/mach-ip22/war.h
View File

@ -10,7 +10,6 @@
#define BCM1250_M3_WAR 0
#define SIBYTE_1956_WAR 0
#define R10000_LLSC_WAR 0
#define MIPS34K_MISSED_ITLB_WAR 0
#endif /* __ASM_MIPS_MACH_IP22_WAR_H */

1
arch/mips/include/asm/mach-ip27/war.h
View File

@ -10,7 +10,6 @@
#define BCM1250_M3_WAR 0
#define SIBYTE_1956_WAR 0
#define R10000_LLSC_WAR 1
#define MIPS34K_MISSED_ITLB_WAR 0
#endif /* __ASM_MIPS_MACH_IP27_WAR_H */

1
arch/mips/include/asm/mach-ip28/war.h
View File

@ -10,7 +10,6 @@
#define BCM1250_M3_WAR 0
#define SIBYTE_1956_WAR 0
#define R10000_LLSC_WAR 1
#define MIPS34K_MISSED_ITLB_WAR 0
#endif /* __ASM_MIPS_MACH_IP28_WAR_H */

5
arch/mips/include/asm/mach-ip30/war.h
View File

@ -7,11 +7,6 @@
#define BCM1250_M3_WAR 0
#define SIBYTE_1956_WAR 0
#ifdef CONFIG_CPU_R10000
#define R10000_LLSC_WAR 1
#else
#define R10000_LLSC_WAR 0
#endif
#define MIPS34K_MISSED_ITLB_WAR 0
#endif /* __ASM_MIPS_MACH_IP30_WAR_H */

1
arch/mips/include/asm/mach-ip32/war.h
View File

@ -10,7 +10,6 @@
#define BCM1250_M3_WAR 0
#define SIBYTE_1956_WAR 0
#define R10000_LLSC_WAR 0
#define MIPS34K_MISSED_ITLB_WAR 0
#endif /* __ASM_MIPS_MACH_IP32_WAR_H */

1
arch/mips/include/asm/mach-malta/war.h
View File

@ -10,7 +10,6 @@
#define BCM1250_M3_WAR 0
#define SIBYTE_1956_WAR 0
#define R10000_LLSC_WAR 0
#define MIPS34K_MISSED_ITLB_WAR 0
#endif /* __ASM_MIPS_MACH_MIPS_WAR_H */

1
arch/mips/include/asm/mach-rc32434/war.h
View File

@ -10,7 +10,6 @@
#define BCM1250_M3_WAR 0
#define SIBYTE_1956_WAR 0
#define R10000_LLSC_WAR 0
#define MIPS34K_MISSED_ITLB_WAR 0
#endif /* __ASM_MIPS_MACH_MIPS_WAR_H */

1
arch/mips/include/asm/mach-rm/war.h
View File

@ -10,7 +10,6 @@
#define BCM1250_M3_WAR 0
#define SIBYTE_1956_WAR 0
#define R10000_LLSC_WAR 0
#define MIPS34K_MISSED_ITLB_WAR 0
#endif /* __ASM_MIPS_MACH_RM_WAR_H */

1
arch/mips/include/asm/mach-sibyte/war.h
View File

@ -24,7 +24,6 @@ extern int sb1250_m3_workaround_needed(void);
#endif
#define R10000_LLSC_WAR 0
#define MIPS34K_MISSED_ITLB_WAR 0
#endif /* __ASM_MIPS_MACH_SIBYTE_WAR_H */

1
arch/mips/include/asm/mach-tx49xx/war.h
View File

@ -10,7 +10,6 @@
#define BCM1250_M3_WAR 0
#define SIBYTE_1956_WAR 0
#define R10000_LLSC_WAR 0
#define MIPS34K_MISSED_ITLB_WAR 0
#endif /* __ASM_MIPS_MACH_TX49XX_WAR_H */

8
arch/mips/include/asm/war.h
View File

@ -93,14 +93,6 @@
#error Check setting of SIBYTE_1956_WAR for your platform
#endif
/*
* On the R10000 up to version 2.6 (not sure about 2.7) there is a bug that
* may cause ll / sc and lld / scd sequences to execute non-atomically.
*/
#ifndef R10000_LLSC_WAR
#error Check setting of R10000_LLSC_WAR for your platform
#endif
/*
* 34K core erratum: "Problems Executing the TLBR Instruction"
*/

2
arch/mips/kernel/syscall.c
View File

@ -106,7 +106,7 @@ static inline int mips_atomic_set(unsigned long addr, unsigned long new)
if (unlikely(!access_ok((const void __user *)addr, 4)))
return -EINVAL;
if (cpu_has_llsc && R10000_LLSC_WAR) {
if (cpu_has_llsc && IS_ENABLED(CONFIG_WAR_R10000_LLSC)) {
__asm__ __volatile__ (
" .set push \n"
" .set arch=r4000 \n"

2
arch/mips/mm/tlbex.c
View File

@ -90,7 +90,7 @@ static inline int __maybe_unused bcm1250_m3_war(void)
static inline int __maybe_unused r10000_llsc_war(void)
{
return R10000_LLSC_WAR;
return IS_ENABLED(CONFIG_WAR_R10000_LLSC);
}
static int use_bbit_insns(void)