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authorHelge Deller <deller@gmx.de>2018-11-10 16:14:59 +0100
committerHelge Deller <deller@gmx.de>2018-12-10 07:47:50 +0100
commit8cc28269b9574103aae9088a02a20929ec75f983 (patch)
tree17847e628ee8aaf6d6b5dbcd5d1a652211d09adf /arch/parisc/kernel/setup.c
parentLinux 4.20-rc6 (diff)
downloadlinux-dev-8cc28269b9574103aae9088a02a20929ec75f983.tar.xz
linux-dev-8cc28269b9574103aae9088a02a20929ec75f983.zip
parisc: Split out alternative live patching code
Move the alternative implemenation coding to alternative.c and add code to patch modules while loading. Signed-off-by: Helge Deller <deller@gmx.de>
Diffstat (limited to '')
-rw-r--r--arch/parisc/kernel/setup.c80
1 files changed, 0 insertions, 80 deletions
diff --git a/arch/parisc/kernel/setup.c b/arch/parisc/kernel/setup.c
index cd227f1cf629..2b108ee3b217 100644
--- a/arch/parisc/kernel/setup.c
+++ b/arch/parisc/kernel/setup.c
@@ -305,86 +305,6 @@ static int __init parisc_init_resources(void)
return 0;
}
-static int no_alternatives __initdata;
-static int __init setup_no_alternatives(char *str)
-{
- no_alternatives = 1;
- return 1;
-}
-__setup("no-alternatives", setup_no_alternatives);
-
-static void __init apply_alternatives_all(void)
-{
- struct alt_instr *entry;
- int index = 0, applied = 0;
-
-
- pr_info("alternatives: %spatching kernel code\n",
- no_alternatives ? "NOT " : "");
- if (no_alternatives)
- return;
-
- set_kernel_text_rw(1);
-
- for (entry = (struct alt_instr *) &__alt_instructions;
- entry < (struct alt_instr *) &__alt_instructions_end;
- entry++, index++) {
-
- u32 *from, len, cond, replacement;
-
- from = (u32 *)((ulong)&entry->orig_offset + entry->orig_offset);
- len = entry->len;
- cond = entry->cond;
- replacement = entry->replacement;
-
- WARN_ON(!cond);
- pr_debug("Check %d: Cond 0x%x, Replace %02d instructions @ 0x%px with 0x%08x\n",
- index, cond, len, from, replacement);
-
- if ((cond & ALT_COND_NO_SMP) && (num_online_cpus() != 1))
- continue;
- if ((cond & ALT_COND_NO_DCACHE) && (cache_info.dc_size != 0))
- continue;
- if ((cond & ALT_COND_NO_ICACHE) && (cache_info.ic_size != 0))
- continue;
-
- /*
- * If the PDC_MODEL capabilities has Non-coherent IO-PDIR bit
- * set (bit #61, big endian), we have to flush and sync every
- * time IO-PDIR is changed in Ike/Astro.
- */
- if ((cond & ALT_COND_NO_IOC_FDC) &&
- (boot_cpu_data.pdc.capabilities & PDC_MODEL_IOPDIR_FDC))
- continue;
-
- /* Want to replace pdtlb by a pdtlb,l instruction? */
- if (replacement == INSN_PxTLB) {
- replacement = *from;
- if (boot_cpu_data.cpu_type >= pcxu) /* >= pa2.0 ? */
- replacement |= (1 << 10); /* set el bit */
- }
-
- /*
- * Replace instruction with NOPs?
- * For long distance insert a branch instruction instead.
- */
- if (replacement == INSN_NOP && len > 1)
- replacement = 0xe8000002 + (len-2)*8; /* "b,n .+8" */
-
- pr_debug("Do %d: Cond 0x%x, Replace %02d instructions @ 0x%px with 0x%08x\n",
- index, cond, len, from, replacement);
-
- /* Replace instruction */
- *from = replacement;
- applied++;
- }
-
- pr_info("alternatives: applied %d out of %d patches\n", applied, index);
-
- set_kernel_text_rw(0);
-}
-
-
extern void gsc_init(void);
extern void processor_init(void);
extern void ccio_init(void);