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-rw-r--r--arch/powerpc/kernel/module.c6
-rw-r--r--arch/powerpc/kernel/setup_32.c4
-rw-r--r--arch/powerpc/kernel/setup_64.c2
-rw-r--r--arch/powerpc/kernel/vdso.c10
-rw-r--r--arch/powerpc/kernel/vdso32/vdso32.lds.S3
-rw-r--r--arch/powerpc/kernel/vdso64/vdso64.lds.S3
-rw-r--r--arch/powerpc/kernel/vmlinux.lds.S6
-rw-r--r--arch/powerpc/lib/feature-fixups-test.S15
-rw-r--r--arch/powerpc/lib/feature-fixups.c36
9 files changed, 85 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/module.c b/arch/powerpc/kernel/module.c
index 40dd52d81c1..af07003573c 100644
--- a/arch/powerpc/kernel/module.c
+++ b/arch/powerpc/kernel/module.c
@@ -86,6 +86,12 @@ int module_finalize(const Elf_Ehdr *hdr,
(void *)sect->sh_addr + sect->sh_size);
#endif
+ sect = find_section(hdr, sechdrs, "__lwsync_fixup");
+ if (sect != NULL)
+ do_lwsync_fixups(cur_cpu_spec->cpu_features,
+ (void *)sect->sh_addr,
+ (void *)sect->sh_addr + sect->sh_size);
+
return 0;
}
diff --git a/arch/powerpc/kernel/setup_32.c b/arch/powerpc/kernel/setup_32.c
index 9e83add5429..0109e7f0ccf 100644
--- a/arch/powerpc/kernel/setup_32.c
+++ b/arch/powerpc/kernel/setup_32.c
@@ -101,6 +101,10 @@ unsigned long __init early_init(unsigned long dt_ptr)
PTRRELOC(&__start___ftr_fixup),
PTRRELOC(&__stop___ftr_fixup));
+ do_lwsync_fixups(spec->cpu_features,
+ PTRRELOC(&__start___lwsync_fixup),
+ PTRRELOC(&__stop___lwsync_fixup));
+
return KERNELBASE + offset;
}
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index 098fd96a394..04d8de9f0fc 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -363,6 +363,8 @@ void __init setup_system(void)
&__start___ftr_fixup, &__stop___ftr_fixup);
do_feature_fixups(powerpc_firmware_features,
&__start___fw_ftr_fixup, &__stop___fw_ftr_fixup);
+ do_lwsync_fixups(cur_cpu_spec->cpu_features,
+ &__start___lwsync_fixup, &__stop___lwsync_fixup);
/*
* Unflatten the device-tree passed by prom_init or kexec
diff --git a/arch/powerpc/kernel/vdso.c b/arch/powerpc/kernel/vdso.c
index ce245a850db..f177c60ea76 100644
--- a/arch/powerpc/kernel/vdso.c
+++ b/arch/powerpc/kernel/vdso.c
@@ -571,6 +571,11 @@ static __init int vdso_fixup_features(struct lib32_elfinfo *v32,
if (start64)
do_feature_fixups(powerpc_firmware_features,
start64, start64 + size64);
+
+ start64 = find_section64(v64->hdr, "__lwsync_fixup", &size64);
+ if (start64)
+ do_lwsync_fixups(cur_cpu_spec->cpu_features,
+ start64, start64 + size64);
#endif /* CONFIG_PPC64 */
start32 = find_section32(v32->hdr, "__ftr_fixup", &size32);
@@ -585,6 +590,11 @@ static __init int vdso_fixup_features(struct lib32_elfinfo *v32,
start32, start32 + size32);
#endif /* CONFIG_PPC64 */
+ start32 = find_section32(v32->hdr, "__lwsync_fixup", &size32);
+ if (start32)
+ do_lwsync_fixups(cur_cpu_spec->cpu_features,
+ start32, start32 + size32);
+
return 0;
}
diff --git a/arch/powerpc/kernel/vdso32/vdso32.lds.S b/arch/powerpc/kernel/vdso32/vdso32.lds.S
index 271793577cd..be3b6a41dc0 100644
--- a/arch/powerpc/kernel/vdso32/vdso32.lds.S
+++ b/arch/powerpc/kernel/vdso32/vdso32.lds.S
@@ -33,6 +33,9 @@ SECTIONS
. = ALIGN(8);
__ftr_fixup : { *(__ftr_fixup) }
+ . = ALIGN(8);
+ __lwsync_fixup : { *(__lwsync_fixup) }
+
#ifdef CONFIG_PPC64
. = ALIGN(8);
__fw_ftr_fixup : { *(__fw_ftr_fixup) }
diff --git a/arch/powerpc/kernel/vdso64/vdso64.lds.S b/arch/powerpc/kernel/vdso64/vdso64.lds.S
index e608d1bd3bf..d0b2526dd38 100644
--- a/arch/powerpc/kernel/vdso64/vdso64.lds.S
+++ b/arch/powerpc/kernel/vdso64/vdso64.lds.S
@@ -35,6 +35,9 @@ SECTIONS
__ftr_fixup : { *(__ftr_fixup) }
. = ALIGN(8);
+ __lwsync_fixup : { *(__lwsync_fixup) }
+
+ . = ALIGN(8);
__fw_ftr_fixup : { *(__fw_ftr_fixup) }
/*
diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S
index 3c07811989f..6856f6c1572 100644
--- a/arch/powerpc/kernel/vmlinux.lds.S
+++ b/arch/powerpc/kernel/vmlinux.lds.S
@@ -127,6 +127,12 @@ SECTIONS
*(__ftr_fixup)
__stop___ftr_fixup = .;
}
+ . = ALIGN(8);
+ __lwsync_fixup : AT(ADDR(__lwsync_fixup) - LOAD_OFFSET) {
+ __start___lwsync_fixup = .;
+ *(__lwsync_fixup)
+ __stop___lwsync_fixup = .;
+ }
#ifdef CONFIG_PPC64
. = ALIGN(8);
__fw_ftr_fixup : AT(ADDR(__fw_ftr_fixup) - LOAD_OFFSET) {
diff --git a/arch/powerpc/lib/feature-fixups-test.S b/arch/powerpc/lib/feature-fixups-test.S
index 0549be04399..cb737484c5a 100644
--- a/arch/powerpc/lib/feature-fixups-test.S
+++ b/arch/powerpc/lib/feature-fixups-test.S
@@ -10,6 +10,7 @@
#include <asm/feature-fixups.h>
#include <asm/ppc_asm.h>
+#include <asm/synch.h>
.text
@@ -725,3 +726,17 @@ MAKE_MACRO_TEST_EXPECTED(FTR);
MAKE_MACRO_TEST(FW_FTR);
MAKE_MACRO_TEST_EXPECTED(FW_FTR);
#endif
+
+globl(lwsync_fixup_test)
+1: or 1,1,1
+ LWSYNC
+globl(end_lwsync_fixup_test)
+
+globl(lwsync_fixup_test_expected_LWSYNC)
+1: or 1,1,1
+ lwsync
+
+globl(lwsync_fixup_test_expected_SYNC)
+1: or 1,1,1
+ sync
+
diff --git a/arch/powerpc/lib/feature-fixups.c b/arch/powerpc/lib/feature-fixups.c
index 48e1ed89052..4e43702b981 100644
--- a/arch/powerpc/lib/feature-fixups.c
+++ b/arch/powerpc/lib/feature-fixups.c
@@ -110,6 +110,22 @@ void do_feature_fixups(unsigned long value, void *fixup_start, void *fixup_end)
}
}
+void do_lwsync_fixups(unsigned long value, void *fixup_start, void *fixup_end)
+{
+ unsigned int *start, *end, *dest;
+
+ if (!(value & CPU_FTR_LWSYNC))
+ return ;
+
+ start = fixup_start;
+ end = fixup_end;
+
+ for (; start < end; start++) {
+ dest = (void *)start + *start;
+ patch_instruction(dest, PPC_LWSYNC_INSTR);
+ }
+}
+
#ifdef CONFIG_FTR_FIXUP_SELFTEST
#define check(x) \
@@ -295,6 +311,25 @@ static void test_fw_macros(void)
#endif
}
+static void test_lwsync_macros(void)
+{
+ extern void lwsync_fixup_test;
+ extern void end_lwsync_fixup_test;
+ extern void lwsync_fixup_test_expected_LWSYNC;
+ extern void lwsync_fixup_test_expected_SYNC;
+ unsigned long size = &end_lwsync_fixup_test -
+ &lwsync_fixup_test;
+
+ /* The fixups have already been done for us during boot */
+ if (cur_cpu_spec->cpu_features & CPU_FTR_LWSYNC) {
+ check(memcmp(&lwsync_fixup_test,
+ &lwsync_fixup_test_expected_LWSYNC, size) == 0);
+ } else {
+ check(memcmp(&lwsync_fixup_test,
+ &lwsync_fixup_test_expected_SYNC, size) == 0);
+ }
+}
+
static int __init test_feature_fixups(void)
{
printk(KERN_DEBUG "Running feature fixup self-tests ...\n");
@@ -307,6 +342,7 @@ static int __init test_feature_fixups(void)
test_alternative_case_with_external_branch();
test_cpu_macros();
test_fw_macros();
+ test_lwsync_macros();
return 0;
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-28 15:50:38 +0000