From 23fa18eaa71266feff7ba8d83022d9e1cc83c65a Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 10 May 2024 07:42:03 +0000
Subject: [PATCH] disable pwm7
---
kernel/arch/powerpc/include/asm/kup.h | 112 +++++++++++++++++++++++++++++++++++++++++++++++++++-----
1 files changed, 102 insertions(+), 10 deletions(-)
diff --git a/kernel/arch/powerpc/include/asm/kup.h b/kernel/arch/powerpc/include/asm/kup.h
index f0f8e36..0d93331 100644
--- a/kernel/arch/powerpc/include/asm/kup.h
+++ b/kernel/arch/powerpc/include/asm/kup.h
@@ -2,39 +2,131 @@
#ifndef _ASM_POWERPC_KUP_H_
#define _ASM_POWERPC_KUP_H_
-#ifndef __ASSEMBLY__
-
-#include <asm/pgtable.h>
+#define KUAP_READ 1
+#define KUAP_WRITE 2
+#define KUAP_READ_WRITE (KUAP_READ | KUAP_WRITE)
+/*
+ * For prevent_user_access() only.
+ * Use the current saved situation instead of the to/from/size params.
+ * Used on book3s/32
+ */
+#define KUAP_CURRENT_READ 4
+#define KUAP_CURRENT_WRITE 8
+#define KUAP_CURRENT (KUAP_CURRENT_READ | KUAP_CURRENT_WRITE)
#ifdef CONFIG_PPC_BOOK3S_64
#include <asm/book3s/64/kup-radix.h>
+#endif
+#ifdef CONFIG_PPC_8xx
+#include <asm/nohash/32/kup-8xx.h>
+#endif
+#ifdef CONFIG_PPC_BOOK3S_32
+#include <asm/book3s/32/kup.h>
+#endif
+
+#ifdef __ASSEMBLY__
+#ifndef CONFIG_PPC_KUAP
+.macro kuap_save_and_lock sp, thread, gpr1, gpr2, gpr3
+.endm
+
+.macro kuap_restore sp, current, gpr1, gpr2, gpr3
+.endm
+
+.macro kuap_check current, gpr
+.endm
+
+.macro kuap_check_amr gpr1, gpr2
+.endm
+
+#endif
+
+#else /* !__ASSEMBLY__ */
+
+#include <linux/pgtable.h>
+
+void setup_kup(void);
+
+#ifdef CONFIG_PPC_KUEP
+void setup_kuep(bool disabled);
#else
+static inline void setup_kuep(bool disabled) { }
+#endif /* CONFIG_PPC_KUEP */
+
+#ifdef CONFIG_PPC_KUAP
+void setup_kuap(bool disabled);
+#else
+static inline void setup_kuap(bool disabled) { }
+
+static inline bool
+bad_kuap_fault(struct pt_regs *regs, unsigned long address, bool is_write)
+{
+ return false;
+}
+
+static inline void kuap_check_amr(void) { }
+
+/*
+ * book3s/64/kup-radix.h defines these functions for the !KUAP case to flush
+ * the L1D cache after user accesses. Only include the empty stubs for other
+ * platforms.
+ */
+#ifndef CONFIG_PPC_BOOK3S_64
static inline void allow_user_access(void __user *to, const void __user *from,
- unsigned long size) { }
+ unsigned long size, unsigned long dir) { }
static inline void prevent_user_access(void __user *to, const void __user *from,
- unsigned long size) { }
+ unsigned long size, unsigned long dir) { }
+static inline unsigned long prevent_user_access_return(void) { return 0UL; }
+static inline void restore_user_access(unsigned long flags) { }
#endif /* CONFIG_PPC_BOOK3S_64 */
+#endif /* CONFIG_PPC_KUAP */
static inline void allow_read_from_user(const void __user *from, unsigned long size)
{
- allow_user_access(NULL, from, size);
+ allow_user_access(NULL, from, size, KUAP_READ);
}
static inline void allow_write_to_user(void __user *to, unsigned long size)
{
- allow_user_access(to, NULL, size);
+ allow_user_access(to, NULL, size, KUAP_WRITE);
+}
+
+static inline void allow_read_write_user(void __user *to, const void __user *from,
+ unsigned long size)
+{
+ allow_user_access(to, from, size, KUAP_READ_WRITE);
}
static inline void prevent_read_from_user(const void __user *from, unsigned long size)
{
- prevent_user_access(NULL, from, size);
+ prevent_user_access(NULL, from, size, KUAP_READ);
}
static inline void prevent_write_to_user(void __user *to, unsigned long size)
{
- prevent_user_access(to, NULL, size);
+ prevent_user_access(to, NULL, size, KUAP_WRITE);
+}
+
+static inline void prevent_read_write_user(void __user *to, const void __user *from,
+ unsigned long size)
+{
+ prevent_user_access(to, from, size, KUAP_READ_WRITE);
+}
+
+static inline void prevent_current_access_user(void)
+{
+ prevent_user_access(NULL, NULL, ~0UL, KUAP_CURRENT);
+}
+
+static inline void prevent_current_read_from_user(void)
+{
+ prevent_user_access(NULL, NULL, ~0UL, KUAP_CURRENT_READ);
+}
+
+static inline void prevent_current_write_to_user(void)
+{
+ prevent_user_access(NULL, NULL, ~0UL, KUAP_CURRENT_WRITE);
}
#endif /* !__ASSEMBLY__ */
-#endif /* _ASM_POWERPC_KUP_H_ */
+#endif /* _ASM_POWERPC_KUAP_H_ */
--
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