b92a226e52
We plan to use jump label for cpu_has_feature(). In order to implement this we need to include the linux/jump_label.h in asm/cputable.h. Unfortunately if we do that it leads to an include loop. The root of the problem seems to be that reg.h needs cputable.h (for CPU_FTRs), and then cputable.h via jump_label.h eventually pulls in hw_irq.h which needs reg.h (for MSR_EE). So move cpu_has_feature() to a separate file on its own. Signed-off-by: Kevin Hao <haokexin@gmail.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> [mpe: Rename to cpu_has_feature.h and flesh out change log] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
47 lines
1.3 KiB
C
47 lines
1.3 KiB
C
/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _ASM_POWERPC_MMAN_H
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#define _ASM_POWERPC_MMAN_H
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#include <uapi/asm/mman.h>
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#ifdef CONFIG_PPC64
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#include <asm/cputable.h>
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#include <linux/mm.h>
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#include <asm/cpu_has_feature.h>
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/*
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* This file is included by linux/mman.h, so we can't use cacl_vm_prot_bits()
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* here. How important is the optimization?
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*/
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static inline unsigned long arch_calc_vm_prot_bits(unsigned long prot,
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unsigned long pkey)
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{
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return (prot & PROT_SAO) ? VM_SAO : 0;
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}
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#define arch_calc_vm_prot_bits(prot, pkey) arch_calc_vm_prot_bits(prot, pkey)
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static inline pgprot_t arch_vm_get_page_prot(unsigned long vm_flags)
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{
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return (vm_flags & VM_SAO) ? __pgprot(_PAGE_SAO) : __pgprot(0);
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}
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#define arch_vm_get_page_prot(vm_flags) arch_vm_get_page_prot(vm_flags)
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static inline int arch_validate_prot(unsigned long prot)
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{
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if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC | PROT_SEM | PROT_SAO))
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return 0;
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if ((prot & PROT_SAO) && !cpu_has_feature(CPU_FTR_SAO))
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return 0;
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return 1;
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}
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#define arch_validate_prot(prot) arch_validate_prot(prot)
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#endif /* CONFIG_PPC64 */
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#endif /* _ASM_POWERPC_MMAN_H */
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