[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [PATCH 1/5] arm/mpu: Implement setup_frametable_mappings for MPU systems
From: Luca Fancellu <luca.fancellu@xxxxxxx> Implement the MPU variant of `setup_frametable_mappings`. This function will be called by `setup_mm` when an implementation for MPU systems is added in a follow up commit. Signed-off-by: Luca Fancellu <luca.fancellu@xxxxxxx> Signed-off-by: Hari Limaye <hari.limaye@xxxxxxx> --- xen/arch/arm/mpu/mm.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/xen/arch/arm/mpu/mm.c b/xen/arch/arm/mpu/mm.c index c6891607ec..6a16fa348d 100644 --- a/xen/arch/arm/mpu/mm.c +++ b/xen/arch/arm/mpu/mm.c @@ -168,6 +168,25 @@ int mpumap_contains_region(pr_t *table, uint8_t nr_regions, paddr_t base, return MPUMAP_REGION_NOTFOUND; } +/* Map a frame table to cover physical addresses ps through pe */ +void __init setup_frametable_mappings(paddr_t ps, paddr_t pe) +{ + mfn_t base_mfn; + unsigned long nr_pdxs = mfn_to_pdx(mfn_add(maddr_to_mfn(pe), -1)) - + mfn_to_pdx(maddr_to_mfn(ps)) + 1; + unsigned long frametable_size = nr_pdxs * sizeof(struct page_info); + + frametable_base_pdx = paddr_to_pdx(ps); + frametable_size = ROUNDUP(frametable_size, PAGE_SIZE); + + base_mfn = alloc_boot_pages(frametable_size >> PAGE_SHIFT, 1); + frame_table = (struct page_info *)mfn_to_virt(mfn_x(base_mfn)); + + memset(&frame_table[0], 0, nr_pdxs * sizeof(struct page_info)); + memset(&frame_table[nr_pdxs], -1, + frametable_size - (nr_pdxs * sizeof(struct page_info))); +} + /* * Allocate an entry for a new EL2 MPU region in the bitmap xen_mpumap_mask. * @param idx Set to the index of the allocated EL2 MPU region on success. -- 2.34.1
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