[PATCH v3 47/62] arm/p2m: Add helper functions to map memory regions
Stefano Stabellini
stefano.stabellini at eu.citrix.com
Fri Nov 27 04:04:22 PST 2015
On Tue, 17 Nov 2015, shannon.zhao at linaro.org wrote:
> From: Parth Dixit <parth.dixit at linaro.org>
>
> Create a helper function for mapping with cached attributes.
>
> Signed-off-by: Parth Dixit <parth.dixit at linaro.org>
> Signed-off-by: Shannon Zhao <shannon.zhao at linaro.org>
You might be able to use the existing guest_physmap_add_entry and
guest_physmap_remove_page for your purposes.
> xen/arch/arm/p2m.c | 26 ++++++++++++++++++++++++++
> xen/include/asm-arm/p2m.h | 10 ++++++++++
> 2 files changed, 36 insertions(+)
>
> diff --git a/xen/arch/arm/p2m.c b/xen/arch/arm/p2m.c
> index e396c40..7a108d8 100644
> --- a/xen/arch/arm/p2m.c
> +++ b/xen/arch/arm/p2m.c
> @@ -1140,6 +1140,32 @@ int p2m_populate_ram(struct domain *d,
> d->arch.p2m.default_access);
> }
>
> +int map_regions(struct domain *d,
> + unsigned long start_gfn,
> + unsigned long nr,
> + unsigned long mfn)
> +{
> + return apply_p2m_changes(d, INSERT,
> + pfn_to_paddr(start_gfn),
> + pfn_to_paddr(start_gfn + nr),
> + pfn_to_paddr(mfn),
> + MATTR_MEM, 0, p2m_mmio_direct,
> + d->arch.p2m.default_access);
> +}
> +
> +int unmap_regions(struct domain *d,
> + unsigned long start_gfn,
> + unsigned long nr,
> + unsigned long mfn)
> +{
> + return apply_p2m_changes(d, REMOVE,
> + pfn_to_paddr(start_gfn),
> + pfn_to_paddr(start_gfn + nr),
> + pfn_to_paddr(mfn),
> + MATTR_MEM, 0, p2m_invalid,
> + d->arch.p2m.default_access);
> +}
> +
> int map_mmio_regions(struct domain *d,
> unsigned long start_gfn,
> unsigned long nr,
> diff --git a/xen/include/asm-arm/p2m.h b/xen/include/asm-arm/p2m.h
> index 08bdce3..b6215f9 100644
> --- a/xen/include/asm-arm/p2m.h
> +++ b/xen/include/asm-arm/p2m.h
> @@ -158,6 +158,16 @@ int p2m_cache_flush(struct domain *d, xen_pfn_t start_mfn, xen_pfn_t end_mfn);
> /* Setup p2m RAM mapping for domain d from start-end. */
> int p2m_populate_ram(struct domain *d, paddr_t start, paddr_t end);
>
> +int map_regions(struct domain *d,
> + unsigned long start_gfn,
> + unsigned long nr_mfns,
> + unsigned long mfn);
> +
> +int unmap_regions(struct domain *d,
> + unsigned long start_gfn,
> + unsigned long nr_mfns,
> + unsigned long mfn);
> +
> int guest_physmap_add_entry(struct domain *d,
> unsigned long gfn,
> unsigned long mfn,
> --
> 2.1.0
>
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