[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [xen master] xen/arm: mm: Re-implement setup_frame_table_mappings() with map_pages_to_xen()
commit c9a707df83aad17a6fcf2e8330ab3b5bead6fb8b Author: Julien Grall <julien.grall@xxxxxxx> AuthorDate: Sat Jun 11 12:27:41 2022 +0100 Commit: Julien Grall <julien@xxxxxxx> CommitDate: Sat Jun 11 12:29:06 2022 +0100 xen/arm: mm: Re-implement setup_frame_table_mappings() with map_pages_to_xen() Now that map_pages_to_xen() has been extended to support 2MB mappings, we can replace the create_mappings() call by map_pages_to_xen() call. This has the advantage to remove the differences between 32-bit and 64-bit code. Lastly remove create_mappings() as there is no more callers. Signed-off-by: Julien Grall <julien.grall@xxxxxxx> Signed-off-by: Julien Grall <jgrall@xxxxxxxxxx> Reviewed-by: Luca Fancellu <luca.fancellu@xxxxxxx> Tested-by: Luca Fancellu <luca.fancellu@xxxxxxx> Reviewed-by: Stefano Stabellini <sstabellini@xxxxxxxxxx> --- xen/arch/arm/mm.c | 64 ++++++------------------------------------------------- 1 file changed, 6 insertions(+), 58 deletions(-) diff --git a/xen/arch/arm/mm.c b/xen/arch/arm/mm.c index 65af44f422..be37176a47 100644 --- a/xen/arch/arm/mm.c +++ b/xen/arch/arm/mm.c @@ -369,40 +369,6 @@ void clear_fixmap(unsigned map) BUG_ON(res != 0); } -/* Create Xen's mappings of memory. - * Mapping_size must be either 2MB or 32MB. - * Base and virt must be mapping_size aligned. - * Size must be a multiple of mapping_size. - * second must be a contiguous set of second level page tables - * covering the region starting at virt_offset. */ -static void __init create_mappings(lpae_t *second, - unsigned long virt_offset, - unsigned long base_mfn, - unsigned long nr_mfns, - unsigned int mapping_size) -{ - unsigned long i, count; - const unsigned long granularity = mapping_size >> PAGE_SHIFT; - lpae_t pte, *p; - - ASSERT((mapping_size == MB(2)) || (mapping_size == MB(32))); - ASSERT(!((virt_offset >> PAGE_SHIFT) % granularity)); - ASSERT(!(base_mfn % granularity)); - ASSERT(!(nr_mfns % granularity)); - - count = nr_mfns / XEN_PT_LPAE_ENTRIES; - p = second + second_linear_offset(virt_offset); - pte = mfn_to_xen_entry(_mfn(base_mfn), MT_NORMAL); - if ( granularity == 16 * XEN_PT_LPAE_ENTRIES ) - pte.pt.contig = 1; /* These maps are in 16-entry contiguous chunks. */ - for ( i = 0; i < count; i++ ) - { - write_pte(p + i, pte); - pte.pt.base += 1 << XEN_PT_LPAE_SHIFT; - } - flush_xen_tlb_local(); -} - #ifdef CONFIG_DOMAIN_PAGE void *map_domain_page_global(mfn_t mfn) { @@ -862,36 +828,18 @@ void __init setup_frametable_mappings(paddr_t ps, paddr_t pe) unsigned long frametable_size = nr_pdxs * sizeof(struct page_info); mfn_t base_mfn; const unsigned long mapping_size = frametable_size < MB(32) ? MB(2) : MB(32); -#ifdef CONFIG_ARM_64 - lpae_t *second, pte; - unsigned long nr_second; - mfn_t second_base; - int i; -#endif + int rc; frametable_base_pdx = mfn_to_pdx(maddr_to_mfn(ps)); /* Round up to 2M or 32M boundary, as appropriate. */ frametable_size = ROUNDUP(frametable_size, mapping_size); base_mfn = alloc_boot_pages(frametable_size >> PAGE_SHIFT, 32<<(20-12)); -#ifdef CONFIG_ARM_64 - /* Compute the number of second level pages. */ - nr_second = ROUNDUP(frametable_size, FIRST_SIZE) >> FIRST_SHIFT; - second_base = alloc_boot_pages(nr_second, 1); - second = mfn_to_virt(second_base); - for ( i = 0; i < nr_second; i++ ) - { - clear_page(mfn_to_virt(mfn_add(second_base, i))); - pte = mfn_to_xen_entry(mfn_add(second_base, i), MT_NORMAL); - pte.pt.table = 1; - write_pte(&xen_first[first_table_offset(FRAMETABLE_VIRT_START)+i], pte); - } - create_mappings(second, 0, mfn_x(base_mfn), frametable_size >> PAGE_SHIFT, - mapping_size); -#else - create_mappings(xen_second, FRAMETABLE_VIRT_START, mfn_x(base_mfn), - frametable_size >> PAGE_SHIFT, mapping_size); -#endif + rc = map_pages_to_xen(FRAMETABLE_VIRT_START, base_mfn, + frametable_size >> PAGE_SHIFT, + PAGE_HYPERVISOR_RW | _PAGE_BLOCK); + if ( rc ) + panic("Unable to setup the frametable mappings.\n"); memset(&frame_table[0], 0, nr_pdxs * sizeof(struct page_info)); memset(&frame_table[nr_pdxs], -1, -- generated by git-patchbot for /home/xen/git/xen.git#master
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