The type is only returned if the full page has the same type. This function is unimplemented for ARM.
Signed-off-by: Roger Pau Monné <[email protected]> --- Cc: Stefano Stabellini <[email protected]> Cc: Julien Grall <[email protected]> Cc: Andrew Cooper <[email protected]> Cc: George Dunlap <[email protected]> Cc: Ian Jackson <[email protected]> Cc: Jan Beulich <[email protected]> Cc: Konrad Rzeszutek Wilk <[email protected]> Cc: Tim Deegan <[email protected]> Cc: Wei Liu <[email protected]> --- xen/arch/arm/mm.c | 6 ++++++ xen/arch/x86/mm.c | 34 ++++++++++++++++++++++++++++++++++ xen/include/xen/mm.h | 2 ++ 3 files changed, 42 insertions(+) diff --git a/xen/arch/arm/mm.c b/xen/arch/arm/mm.c index d234c46e41..f734b9287a 100644 --- a/xen/arch/arm/mm.c +++ b/xen/arch/arm/mm.c @@ -1181,6 +1181,12 @@ int page_is_ram_type(unsigned long mfn, unsigned long mem_type) return 0; } +int page_get_type(unsigned long mfn) +{ + ASSERT_UNREACHABLE(); + return -1; +} + unsigned long domain_get_maximum_gpfn(struct domain *d) { return gfn_x(d->arch.p2m.max_mapped_gfn); diff --git a/xen/arch/x86/mm.c b/xen/arch/x86/mm.c index a1a1f5f3c3..cb4b68b2a9 100644 --- a/xen/arch/x86/mm.c +++ b/xen/arch/x86/mm.c @@ -430,6 +430,40 @@ int page_is_ram_type(unsigned long mfn, unsigned long mem_type) return 0; } +int page_get_type(unsigned long mfn) +{ + uint64_t maddr = pfn_to_paddr(mfn); + unsigned int i; + + for ( i = 0; i < e820.nr_map; i++ ) + { + /* Test the range. */ + if ( (e820.map[i].addr <= maddr) && + ((e820.map[i].addr + e820.map[i].size) >= (maddr + PAGE_SIZE)) ) + switch ( e820.map[i].type ) + { + case E820_RAM: + return RAM_TYPE_CONVENTIONAL; + + case E820_RESERVED: + return RAM_TYPE_RESERVED; + + case E820_UNUSABLE: + return RAM_TYPE_UNUSABLE; + + case E820_ACPI: + case E820_NVS: + return RAM_TYPE_ACPI; + + default: + ASSERT_UNREACHABLE(); + return -1; + } + } + + return -1; +} + unsigned long domain_get_maximum_gpfn(struct domain *d) { if ( is_hvm_domain(d) ) diff --git a/xen/include/xen/mm.h b/xen/include/xen/mm.h index 24654e8e22..9584fe3a77 100644 --- a/xen/include/xen/mm.h +++ b/xen/include/xen/mm.h @@ -597,6 +597,8 @@ int __must_check donate_page(struct domain *d, struct page_info *page, #define RAM_TYPE_ACPI 0x00000008 /* TRUE if the whole page at @mfn is of the requested RAM type(s) above. */ int page_is_ram_type(unsigned long mfn, unsigned long mem_type); +/* Returns the page type if the whole page is of the same type. */ +int page_get_type(unsigned long mfn); /* Prepare/destroy a ring for a dom0 helper. Helper with talk * with Xen on behalf of this domain. */ -- 2.18.0 _______________________________________________ Xen-devel mailing list [email protected] https://lists.xenproject.org/mailman/listinfo/xen-devel
