Resguardo inicial

2026-09-06 12:53:21 -06:00
parent 662efe3c2a
commit ad2088d178
94853 changed files with 43200404 additions and 0 deletions
@@ -0,0 +1,35 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef _ASM_RISCV_KFENCE_H
+#define _ASM_RISCV_KFENCE_H
+
+#include <linux/kfence.h>
+#include <linux/pfn.h>
+#include <asm-generic/pgalloc.h>
+#include <asm/cacheflush.h>
+#include <asm/pgtable.h>
+
+static inline bool arch_kfence_init_pool(void)
+{
+	return true;
+}
+
+static inline bool kfence_protect_page(unsigned long addr, bool protect)
+{
+	pte_t *pte = virt_to_kpte(addr);
+
+	if (protect) {
+		set_pte(pte, __pte(pte_val(ptep_get(pte)) & ~_PAGE_PRESENT));
+	} else {
+		set_pte(pte, __pte(pte_val(ptep_get(pte)) | _PAGE_PRESENT));
+		mark_new_valid_map();
+	}
+
+	preempt_disable();
+	local_flush_tlb_kernel_range(addr, addr + PAGE_SIZE);
+	preempt_enable();
+
+	return true;
+}
+
+#endif /* _ASM_RISCV_KFENCE_H */