[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH 2/3] xen: arm: flush TLB on all CPUs when setting or clearing fixmaps
These mappings are global and therefore need flushing on all processors. Add flush_all_xen_data_tlb_range_va which accomplishes this. Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx> --- v3: use dsb(sy) not dsb() --- xen/arch/arm/mm.c | 4 ++-- xen/include/asm-arm/arm32/page.h | 19 +++++++++++++++++++ xen/include/asm-arm/arm64/page.h | 19 +++++++++++++++++++ 3 files changed, 40 insertions(+), 2 deletions(-) diff --git a/xen/arch/arm/mm.c b/xen/arch/arm/mm.c index d523f77..b966a5c 100644 --- a/xen/arch/arm/mm.c +++ b/xen/arch/arm/mm.c @@ -215,7 +215,7 @@ void set_fixmap(unsigned map, unsigned long mfn, unsigned attributes) pte.pt.table = 1; /* 4k mappings always have this bit set */ pte.pt.xn = 1; write_pte(xen_fixmap + third_table_offset(FIXMAP_ADDR(map)), pte); - flush_xen_data_tlb_range_va_local(FIXMAP_ADDR(map), PAGE_SIZE); + flush_xen_data_tlb_range_va(FIXMAP_ADDR(map), PAGE_SIZE); } /* Remove a mapping from a fixmap entry */ @@ -223,7 +223,7 @@ void clear_fixmap(unsigned map) { lpae_t pte = {0}; write_pte(xen_fixmap + third_table_offset(FIXMAP_ADDR(map)), pte); - flush_xen_data_tlb_range_va_local(FIXMAP_ADDR(map), PAGE_SIZE); + flush_xen_data_tlb_range_va(FIXMAP_ADDR(map), PAGE_SIZE); } #ifdef CONFIG_DOMAIN_PAGE diff --git a/xen/include/asm-arm/arm32/page.h b/xen/include/asm-arm/arm32/page.h index b0a2025..2b2bbe6 100644 --- a/xen/include/asm-arm/arm32/page.h +++ b/xen/include/asm-arm/arm32/page.h @@ -82,6 +82,25 @@ static inline void flush_xen_data_tlb_range_va_local(unsigned long va, isb(); } +/* + * Flush a range of VA's hypervisor mappings from the data TLB on all + * processors in the inner-shareable domain. This is not sufficient + * when changing code mappings or for self modifying code. + */ +static inline void flush_xen_data_tlb_range_va(unsigned long va, + unsigned long size) +{ + unsigned long end = va + size; + dsb(sy); /* Ensure preceding are visible */ + while ( va < end ) { + asm volatile(STORE_CP32(0, TLBIMVAHIS) + : : "r" (va) : "memory"); + va += PAGE_SIZE; + } + dsb(sy); /* Ensure completion of the TLB flush */ + isb(); +} + /* Ask the MMU to translate a VA for us */ static inline uint64_t __va_to_par(vaddr_t va) { diff --git a/xen/include/asm-arm/arm64/page.h b/xen/include/asm-arm/arm64/page.h index 65332a3..fdc652c 100644 --- a/xen/include/asm-arm/arm64/page.h +++ b/xen/include/asm-arm/arm64/page.h @@ -74,6 +74,25 @@ static inline void flush_xen_data_tlb_range_va_local(unsigned long va, isb(); } +/* + * Flush a range of VA's hypervisor mappings from the data TLB of all + * processors in the inner-shareable domain. This is not sufficient + * when changing code mappings or for self modifying code. + */ +static inline void flush_xen_data_tlb_range_va(unsigned long va, + unsigned long size) +{ + unsigned long end = va + size; + dsb(sy); /* Ensure preceding are visible */ + while ( va < end ) { + asm volatile("tlbi vae2is, %0;" + : : "r" (va>>PAGE_SHIFT) : "memory"); + va += PAGE_SIZE; + } + dsb(sy); /* Ensure completion of the TLB flush */ + isb(); +} + /* Ask the MMU to translate a VA for us */ static inline uint64_t __va_to_par(vaddr_t va) { -- 1.7.10.4 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
|
Lists.xenproject.org is hosted with RackSpace, monitoring our |