Commit e08758f5 authored by Nikita Panov's avatar Nikita Panov Committed by Denis Darvish
Browse files

arm64: add support of memory protection for NUMA replicas 

kunpeng inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/IBOJU2



-------------------------------------------------

Acked-by: default avatarArtem Kuzin <artem.kuzin@huawei.com>
Acked-by: default avatarAlexander Grubnikov <alexander.grubnikov@huawei.com>
Acked-by: default avatarIlya Hanov <ilya.hanov@huawei-partners.com>
Acked-by: default avatarDenis Darvish <darvish.denis@huawei.com>
Signed-off-by: default avatarNikita Panov <panov.nikita@huawei.com>
parent 7f770cd1

arch/arm64/mm/pageattr.c

+62 −0
Original line number Diff line number Diff line
@@ -64,6 +64,24 @@ static int __change_memory_common(unsigned long start, unsigned long size, 
	return ret;

}



#ifdef CONFIG_KERNEL_REPLICATION

static int __change_memory_common_replicas(unsigned long start, unsigned long size,

					pgprot_t set_mask, pgprot_t clear_mask)

{

	struct page_change_data data;

	int ret;



	data.set_mask = set_mask;

	data.clear_mask = clear_mask;



	ret = apply_to_page_range_replicas(&init_mm, start, size,

			change_page_range, &data);



	flush_tlb_kernel_range(start, start + size);

	return ret;

}

#endif /* CONFIG_KERNEL_REPLICATION */



static int change_memory_common(unsigned long addr, int numpages,

				pgprot_t set_mask, pgprot_t clear_mask)

{
@@ -122,6 +140,20 @@ static int change_memory_common(unsigned long addr, int numpages, 
	return __change_memory_common(start, size, set_mask, clear_mask);

}



#ifdef CONFIG_KERNEL_REPLICATION

static int numa_change_memory_common(unsigned long addr, int numpages,

				pgprot_t set_mask, pgprot_t clear_mask)

{

	int ret;



	ret = change_memory_common(addr, numpages, set_mask, clear_mask);

	if (ret)

		return ret;



	return __change_memory_common_replicas(addr, numpages * PAGE_SIZE, set_mask, clear_mask);

}

#endif /* CONFIG_KERNEL_REPLICATION */



int set_memory_ro(unsigned long addr, int numpages)

{

	return change_memory_common(addr, numpages,
@@ -150,6 +182,36 @@ int set_memory_x(unsigned long addr, int numpages) 
					__pgprot(PTE_PXN));

}



#ifdef CONFIG_KERNEL_REPLICATION

int numa_set_memory_x(unsigned long addr, int numpages)

{

	return numa_change_memory_common(addr, numpages,

					__pgprot(PTE_MAYBE_GP),

					__pgprot(PTE_PXN));

}



int numa_set_memory_nx(unsigned long addr, int numpages)

{

	return numa_change_memory_common(addr, numpages,

					__pgprot(PTE_PXN),

					__pgprot(PTE_MAYBE_GP));

}



int numa_set_memory_ro(unsigned long addr, int numpages)

{

	return numa_change_memory_common(addr, numpages,

					__pgprot(PTE_RDONLY),

					__pgprot(PTE_WRITE));

}



int numa_set_memory_rw(unsigned long addr, int numpages)

{

	return numa_change_memory_common(addr, numpages,

					__pgprot(PTE_WRITE),

					__pgprot(PTE_RDONLY));

}

#endif /*CONFIG_KERNEL_REPLICATION*/



int set_memory_valid(unsigned long addr, int numpages, int enable)

{

	if (enable)