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ca5999fde0
The include/linux/pgtable.h is going to be the home of generic page table manipulation functions. Start with moving asm-generic/pgtable.h to include/linux/pgtable.h and make the latter include asm/pgtable.h. Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Cain <bcain@codeaurora.org> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Chris Zankel <chris@zankel.net> Cc: "David S. Miller" <davem@davemloft.net> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Greentime Hu <green.hu@gmail.com> Cc: Greg Ungerer <gerg@linux-m68k.org> Cc: Guan Xuetao <gxt@pku.edu.cn> Cc: Guo Ren <guoren@kernel.org> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Helge Deller <deller@gmx.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Ley Foon Tan <ley.foon.tan@intel.com> Cc: Mark Salter <msalter@redhat.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Matt Turner <mattst88@gmail.com> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Michal Simek <monstr@monstr.eu> Cc: Nick Hu <nickhu@andestech.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Richard Weinberger <richard@nod.at> Cc: Rich Felker <dalias@libc.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Stafford Horne <shorne@gmail.com> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tony Luck <tony.luck@intel.com> Cc: Vincent Chen <deanbo422@gmail.com> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Will Deacon <will@kernel.org> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Link: http://lkml.kernel.org/r/20200514170327.31389-3-rppt@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
119 lines
3.0 KiB
C
119 lines
3.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_POWERPC_KUP_H_
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#define _ASM_POWERPC_KUP_H_
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#define KUAP_READ 1
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#define KUAP_WRITE 2
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#define KUAP_READ_WRITE (KUAP_READ | KUAP_WRITE)
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/*
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* For prevent_user_access() only.
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* Use the current saved situation instead of the to/from/size params.
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* Used on book3s/32
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*/
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#define KUAP_CURRENT_READ 4
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#define KUAP_CURRENT_WRITE 8
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#define KUAP_CURRENT (KUAP_CURRENT_READ | KUAP_CURRENT_WRITE)
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#ifdef CONFIG_PPC64
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#include <asm/book3s/64/kup-radix.h>
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#endif
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#ifdef CONFIG_PPC_8xx
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#include <asm/nohash/32/kup-8xx.h>
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#endif
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#ifdef CONFIG_PPC_BOOK3S_32
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#include <asm/book3s/32/kup.h>
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#endif
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#ifdef __ASSEMBLY__
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#ifndef CONFIG_PPC_KUAP
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.macro kuap_save_and_lock sp, thread, gpr1, gpr2, gpr3
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.endm
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.macro kuap_restore sp, current, gpr1, gpr2, gpr3
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.endm
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.macro kuap_check current, gpr
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.endm
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#endif
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#else /* !__ASSEMBLY__ */
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#include <linux/pgtable.h>
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void setup_kup(void);
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#ifdef CONFIG_PPC_KUEP
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void setup_kuep(bool disabled);
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#else
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static inline void setup_kuep(bool disabled) { }
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#endif /* CONFIG_PPC_KUEP */
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#ifdef CONFIG_PPC_KUAP
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void setup_kuap(bool disabled);
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#else
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static inline void setup_kuap(bool disabled) { }
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static inline void allow_user_access(void __user *to, const void __user *from,
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unsigned long size, unsigned long dir) { }
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static inline void prevent_user_access(void __user *to, const void __user *from,
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unsigned long size, unsigned long dir) { }
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static inline unsigned long prevent_user_access_return(void) { return 0UL; }
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static inline void restore_user_access(unsigned long flags) { }
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static inline bool
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bad_kuap_fault(struct pt_regs *regs, unsigned long address, bool is_write)
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{
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return false;
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}
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#endif /* CONFIG_PPC_KUAP */
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static inline void allow_read_from_user(const void __user *from, unsigned long size)
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{
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allow_user_access(NULL, from, size, KUAP_READ);
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}
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static inline void allow_write_to_user(void __user *to, unsigned long size)
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{
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allow_user_access(to, NULL, size, KUAP_WRITE);
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}
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static inline void allow_read_write_user(void __user *to, const void __user *from,
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unsigned long size)
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{
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allow_user_access(to, from, size, KUAP_READ_WRITE);
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}
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static inline void prevent_read_from_user(const void __user *from, unsigned long size)
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{
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prevent_user_access(NULL, from, size, KUAP_READ);
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}
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static inline void prevent_write_to_user(void __user *to, unsigned long size)
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{
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prevent_user_access(to, NULL, size, KUAP_WRITE);
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}
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static inline void prevent_read_write_user(void __user *to, const void __user *from,
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unsigned long size)
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{
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prevent_user_access(to, from, size, KUAP_READ_WRITE);
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}
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static inline void prevent_current_access_user(void)
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{
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prevent_user_access(NULL, NULL, ~0UL, KUAP_CURRENT);
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}
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static inline void prevent_current_read_from_user(void)
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{
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prevent_user_access(NULL, NULL, ~0UL, KUAP_CURRENT_READ);
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}
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static inline void prevent_current_write_to_user(void)
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{
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prevent_user_access(NULL, NULL, ~0UL, KUAP_CURRENT_WRITE);
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}
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#endif /* !__ASSEMBLY__ */
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#endif /* _ASM_POWERPC_KUAP_H_ */
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