[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen-unstable] xen/arm: introduce flush_xen_data_tlb_range_va
# HG changeset patch # User Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx> # Date 1359031669 0 # Node ID cc4c1e0ecbaf02887efb5a35ccbd6e377938cb28 # Parent 50c72c52473d3eaad9a5534f8a4257b7dfae2c2c xen/arm: introduce flush_xen_data_tlb_range_va Add flush_xen_data_tlb_range_va, that flushes a range of virtual addresses. Replace all the calls to flush_xen_data_tlb_va with calls to flush_xen_data_tlb_range_va and remove flush_xen_data_tlb_va. Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx> Acked-by: Ian Campbell <ian.campbell@xxxxxxxxxx> Committed-by: Ian Campbell <ian.campbell@xxxxxxxxxx> --- diff -r 50c72c52473d -r cc4c1e0ecbaf xen/arch/arm/mm.c --- a/xen/arch/arm/mm.c Thu Jan 24 12:47:48 2013 +0000 +++ b/xen/arch/arm/mm.c Thu Jan 24 12:47:49 2013 +0000 @@ -114,7 +114,7 @@ void set_fixmap(unsigned map, unsigned l pte.pt.ai = attributes; pte.pt.xn = 1; write_pte(xen_fixmap + third_table_offset(FIXMAP_ADDR(map)), pte); - flush_xen_data_tlb_va(FIXMAP_ADDR(map)); + flush_xen_data_tlb_range_va(FIXMAP_ADDR(map), PAGE_SIZE); } /* Remove a mapping from a fixmap entry */ @@ -122,7 +122,7 @@ void clear_fixmap(unsigned map) { lpae_t pte = {0}; write_pte(xen_fixmap + third_table_offset(FIXMAP_ADDR(map)), pte); - flush_xen_data_tlb_va(FIXMAP_ADDR(map)); + flush_xen_data_tlb_range_va(FIXMAP_ADDR(map), PAGE_SIZE); } /* Map a page of domheap memory */ @@ -186,7 +186,7 @@ void *map_domain_page(unsigned long mfn) * We may not have flushed this specific subpage at map time, * since we only flush the 4k page not the superpage */ - flush_xen_data_tlb_va(va); + flush_xen_data_tlb_range_va(va, PAGE_SIZE); return (void *)va; } @@ -246,7 +246,7 @@ void __init setup_pagetables(unsigned lo dest_va = BOOT_MISC_VIRT_START; pte = mfn_to_xen_entry(xen_paddr >> PAGE_SHIFT); write_pte(xen_second + second_table_offset(dest_va), pte); - flush_xen_data_tlb_va(dest_va); + flush_xen_data_tlb_range_va(dest_va, PAGE_SIZE); /* Calculate virt-to-phys offset for the new location */ phys_offset = xen_paddr - (unsigned long) _start; diff -r 50c72c52473d -r cc4c1e0ecbaf xen/include/asm-arm/page.h --- a/xen/include/asm-arm/page.h Thu Jan 24 12:47:48 2013 +0000 +++ b/xen/include/asm-arm/page.h Thu Jan 24 12:47:49 2013 +0000 @@ -316,16 +316,20 @@ static inline void flush_xen_data_tlb(vo } /* - * Flush one VA's hypervisor mappings from the data TLB. This is not + * Flush a range of VA's hypervisor mappings from the data TLB. This is not * sufficient when changing code mappings or for self modifying code. */ -static inline void flush_xen_data_tlb_va(unsigned long va) +static inline void flush_xen_data_tlb_range_va(unsigned long va, unsigned long size) { - asm volatile("dsb;" /* Ensure preceding are visible */ - STORE_CP32(0, TLBIMVAH) - "dsb;" /* Ensure completion of the TLB flush */ - "isb;" - : : "r" (va) : "memory"); + unsigned long end = va + size; + dsb(); /* Ensure preceding are visible */ + while ( va < end ) { + asm volatile(STORE_CP32(0, TLBIMVAH) + : : "r" (va) : "memory"); + va += PAGE_SIZE; + } + dsb(); /* Ensure completion of the TLB flush */ + isb(); } /* Flush all non-hypervisor mappings from the TLB */ _______________________________________________ Xen-changelog mailing list Xen-changelog@xxxxxxxxxxxxx http://lists.xensource.com/xen-changelog
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