mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-03 15:47:36 +00:00
91d4ce985f
This defines and exports a platform specific custom vm_get_page_prot() via subscribing ARCH_HAS_VM_GET_PAGE_PROT. It localizes arch_vm_get_page_prot() as sparc_vm_get_page_prot() and moves near vm_get_page_prot(). Link: https://lkml.kernel.org/r/20220414062125.609297-5-anshuman.khandual@arm.com Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> Acked-by: David S. Miller <davem@davemloft.net> Reviewed-by: Khalid Aziz <khalid.aziz@oracle.com> Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: Khalid Aziz <khalid.aziz@oracle.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Christoph Hellwig <hch@infradead.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Paul Mackerras <paulus@samba.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
91 lines
2.4 KiB
C
91 lines
2.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef __SPARC_MMAN_H__
|
|
#define __SPARC_MMAN_H__
|
|
|
|
#include <uapi/asm/mman.h>
|
|
|
|
#ifndef __ASSEMBLY__
|
|
#define arch_mmap_check(addr,len,flags) sparc_mmap_check(addr,len)
|
|
int sparc_mmap_check(unsigned long addr, unsigned long len);
|
|
|
|
#ifdef CONFIG_SPARC64
|
|
#include <asm/adi_64.h>
|
|
|
|
static inline void ipi_set_tstate_mcde(void *arg)
|
|
{
|
|
struct mm_struct *mm = arg;
|
|
|
|
/* Set TSTATE_MCDE for the task using address map that ADI has been
|
|
* enabled on if the task is running. If not, it will be set
|
|
* automatically at the next context switch
|
|
*/
|
|
if (current->mm == mm) {
|
|
struct pt_regs *regs;
|
|
|
|
regs = task_pt_regs(current);
|
|
regs->tstate |= TSTATE_MCDE;
|
|
}
|
|
}
|
|
|
|
#define arch_calc_vm_prot_bits(prot, pkey) sparc_calc_vm_prot_bits(prot)
|
|
static inline unsigned long sparc_calc_vm_prot_bits(unsigned long prot)
|
|
{
|
|
if (adi_capable() && (prot & PROT_ADI)) {
|
|
struct pt_regs *regs;
|
|
|
|
if (!current->mm->context.adi) {
|
|
regs = task_pt_regs(current);
|
|
regs->tstate |= TSTATE_MCDE;
|
|
current->mm->context.adi = true;
|
|
on_each_cpu_mask(mm_cpumask(current->mm),
|
|
ipi_set_tstate_mcde, current->mm, 0);
|
|
}
|
|
return VM_SPARC_ADI;
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
#define arch_validate_prot(prot, addr) sparc_validate_prot(prot, addr)
|
|
static inline int sparc_validate_prot(unsigned long prot, unsigned long addr)
|
|
{
|
|
if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC | PROT_SEM | PROT_ADI))
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
#define arch_validate_flags(vm_flags) arch_validate_flags(vm_flags)
|
|
/* arch_validate_flags() - Ensure combination of flags is valid for a
|
|
* VMA.
|
|
*/
|
|
static inline bool arch_validate_flags(unsigned long vm_flags)
|
|
{
|
|
/* If ADI is being enabled on this VMA, check for ADI
|
|
* capability on the platform and ensure VMA is suitable
|
|
* for ADI
|
|
*/
|
|
if (vm_flags & VM_SPARC_ADI) {
|
|
if (!adi_capable())
|
|
return false;
|
|
|
|
/* ADI can not be enabled on PFN mapped pages */
|
|
if (vm_flags & (VM_PFNMAP | VM_MIXEDMAP))
|
|
return false;
|
|
|
|
/* Mergeable pages can become unmergeable
|
|
* if ADI is enabled on them even if they
|
|
* have identical data on them. This can be
|
|
* because ADI enabled pages with identical
|
|
* data may still not have identical ADI
|
|
* tags on them. Disallow ADI on mergeable
|
|
* pages.
|
|
*/
|
|
if (vm_flags & VM_MERGEABLE)
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
#endif /* CONFIG_SPARC64 */
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
#endif /* __SPARC_MMAN_H__ */
|