cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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mman.h (1079B)

      1/* SPDX-License-Identifier: GPL-2.0-or-later */
      2/*
      3 */
      4#ifndef _ASM_POWERPC_MMAN_H
      5#define _ASM_POWERPC_MMAN_H
      6
      7#include <uapi/asm/mman.h>
      8
      9#ifdef CONFIG_PPC64
     10
     11#include <asm/cputable.h>
     12#include <linux/mm.h>
     13#include <linux/pkeys.h>
     14#include <asm/cpu_has_feature.h>
     15
     16static inline unsigned long arch_calc_vm_prot_bits(unsigned long prot,
     17		unsigned long pkey)
     18{
     19#ifdef CONFIG_PPC_MEM_KEYS
     20	return (((prot & PROT_SAO) ? VM_SAO : 0) | pkey_to_vmflag_bits(pkey));
     21#else
     22	return ((prot & PROT_SAO) ? VM_SAO : 0);
     23#endif
     24}
     25#define arch_calc_vm_prot_bits(prot, pkey) arch_calc_vm_prot_bits(prot, pkey)
     26
     27static inline bool arch_validate_prot(unsigned long prot, unsigned long addr)
     28{
     29	if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC | PROT_SEM | PROT_SAO))
     30		return false;
     31	if (prot & PROT_SAO) {
     32		if (!cpu_has_feature(CPU_FTR_SAO))
     33			return false;
     34		if (firmware_has_feature(FW_FEATURE_LPAR) &&
     35		    !IS_ENABLED(CONFIG_PPC_PROT_SAO_LPAR))
     36			return false;
     37	}
     38	return true;
     39}
     40#define arch_validate_prot arch_validate_prot
     41
     42#endif /* CONFIG_PPC64 */
     43#endif	/* _ASM_POWERPC_MMAN_H */