[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [PATCH v4 03/21] IOMMU: add order parameter to ->{,un}map_page() hooks
Or really, in the case of ->map_page(), accommodate it in the existing "flags" parameter. All call sites will pass 0 for now. Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx> Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx> Reviewed-by: Roger Pau Monné <roger.pau@xxxxxxxxxx> Acked-by: Julien Grall <jgrall@xxxxxxxxxx> # Arm --- v4: Re-base. v3: Re-base over new earlier patch. v2: Re-base over change earlier in the series. --- a/xen/arch/arm/include/asm/iommu.h +++ b/xen/arch/arm/include/asm/iommu.h @@ -31,6 +31,7 @@ int __must_check arm_iommu_map_page(stru unsigned int flags, unsigned int *flush_flags); int __must_check arm_iommu_unmap_page(struct domain *d, dfn_t dfn, + unsigned int order, unsigned int *flush_flags); #endif /* __ARCH_ARM_IOMMU_H__ */ --- a/xen/drivers/passthrough/amd/iommu.h +++ b/xen/drivers/passthrough/amd/iommu.h @@ -245,7 +245,8 @@ int __must_check cf_check amd_iommu_map_ struct domain *d, dfn_t dfn, mfn_t mfn, unsigned int flags, unsigned int *flush_flags); int __must_check cf_check amd_iommu_unmap_page( - struct domain *d, dfn_t dfn, unsigned int *flush_flags); + struct domain *d, dfn_t dfn, unsigned int order, + unsigned int *flush_flags); int __must_check amd_iommu_alloc_root(struct domain *d); int amd_iommu_reserve_domain_unity_map(struct domain *domain, const struct ivrs_unity_map *map, --- a/xen/drivers/passthrough/amd/iommu_map.c +++ b/xen/drivers/passthrough/amd/iommu_map.c @@ -395,7 +395,7 @@ int cf_check amd_iommu_map_page( } int cf_check amd_iommu_unmap_page( - struct domain *d, dfn_t dfn, unsigned int *flush_flags) + struct domain *d, dfn_t dfn, unsigned int order, unsigned int *flush_flags) { unsigned long pt_mfn = 0; struct domain_iommu *hd = dom_iommu(d); --- a/xen/drivers/passthrough/arm/iommu_helpers.c +++ b/xen/drivers/passthrough/arm/iommu_helpers.c @@ -57,11 +57,13 @@ int __must_check arm_iommu_map_page(stru * The function guest_physmap_add_entry replaces the current mapping * if there is already one... */ - return guest_physmap_add_entry(d, _gfn(dfn_x(dfn)), _mfn(dfn_x(dfn)), 0, t); + return guest_physmap_add_entry(d, _gfn(dfn_x(dfn)), _mfn(dfn_x(dfn)), + IOMMUF_order(flags), t); } /* Should only be used if P2M Table is shared between the CPU and the IOMMU. */ int __must_check arm_iommu_unmap_page(struct domain *d, dfn_t dfn, + unsigned int order, unsigned int *flush_flags) { /* @@ -71,7 +73,8 @@ int __must_check arm_iommu_unmap_page(st if ( !is_domain_direct_mapped(d) ) return -EINVAL; - return guest_physmap_remove_page(d, _gfn(dfn_x(dfn)), _mfn(dfn_x(dfn)), 0); + return guest_physmap_remove_page(d, _gfn(dfn_x(dfn)), _mfn(dfn_x(dfn)), + order); } /* --- a/xen/drivers/passthrough/iommu.c +++ b/xen/drivers/passthrough/iommu.c @@ -294,6 +294,8 @@ int iommu_map(struct domain *d, dfn_t df if ( !is_iommu_enabled(d) ) return 0; + ASSERT(!IOMMUF_order(flags)); + for ( i = 0; i < page_count; i++ ) { rc = iommu_call(hd->platform_ops, map_page, d, dfn_add(dfn, i), @@ -354,7 +356,7 @@ int iommu_unmap(struct domain *d, dfn_t for ( i = 0; i < page_count; i++ ) { int err = iommu_call(hd->platform_ops, unmap_page, d, dfn_add(dfn, i), - flush_flags); + 0, flush_flags); if ( likely(!err) ) continue; --- a/xen/drivers/passthrough/vtd/iommu.c +++ b/xen/drivers/passthrough/vtd/iommu.c @@ -2163,7 +2163,7 @@ static int __must_check cf_check intel_i } static int __must_check cf_check intel_iommu_unmap_page( - struct domain *d, dfn_t dfn, unsigned int *flush_flags) + struct domain *d, dfn_t dfn, unsigned int order, unsigned int *flush_flags) { /* Do nothing if VT-d shares EPT page table */ if ( iommu_use_hap_pt(d) ) @@ -2173,7 +2173,7 @@ static int __must_check cf_check intel_i if ( iommu_hwdom_passthrough && is_hardware_domain(d) ) return 0; - return dma_pte_clear_one(d, dfn_to_daddr(dfn), 0, flush_flags); + return dma_pte_clear_one(d, dfn_to_daddr(dfn), order, flush_flags); } static int cf_check intel_iommu_lookup_page( --- a/xen/include/xen/iommu.h +++ b/xen/include/xen/iommu.h @@ -127,9 +127,10 @@ void arch_iommu_hwdom_init(struct domain * The following flags are passed to map operations and passed by lookup * operations. */ -#define _IOMMUF_readable 0 +#define IOMMUF_order(n) ((n) & 0x3f) +#define _IOMMUF_readable 6 #define IOMMUF_readable (1u<<_IOMMUF_readable) -#define _IOMMUF_writable 1 +#define _IOMMUF_writable 7 #define IOMMUF_writable (1u<<_IOMMUF_writable) /* @@ -255,6 +256,7 @@ struct iommu_ops { unsigned int flags, unsigned int *flush_flags); int __must_check (*unmap_page)(struct domain *d, dfn_t dfn, + unsigned int order, unsigned int *flush_flags); int __must_check (*lookup_page)(struct domain *d, dfn_t dfn, mfn_t *mfn, unsigned int *flags);
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