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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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40 lines
765 B
C
40 lines
765 B
C
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/mutex.h>
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#include <linux/cpu.h>
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#include <linux/jump_label.h>
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#include <linux/memory.h>
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#ifdef HAVE_JUMP_LABEL
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void arch_jump_label_transform(struct jump_entry *entry,
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enum jump_label_type type)
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{
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u32 val;
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u32 *insn = (u32 *) (unsigned long) entry->code;
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if (type == JUMP_LABEL_ENABLE) {
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s32 off = (s32)entry->target - (s32)entry->code;
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#ifdef CONFIG_SPARC64
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/* ba,pt %xcc, . + (off << 2) */
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val = 0x10680000 | ((u32) off >> 2);
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#else
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/* ba . + (off << 2) */
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val = 0x10800000 | ((u32) off >> 2);
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#endif
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} else {
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val = 0x01000000;
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}
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get_online_cpus();
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mutex_lock(&text_mutex);
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*insn = val;
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flushi(insn);
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mutex_unlock(&text_mutex);
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put_online_cpus();
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}
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#endif
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