[PATCH v5 2/6] xen/arm: Implement get_maximum_gpfn hypercall for arm

[PATCH v5 2/6] xen/arm: Implement get_maximum_gpfn hypercall for arm

[Jaeyong Yoo]

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By using the memory map info in arch_domain (from set_memory_map hypercall)

implement get_maximum_gpfn hypercall.

 

Changes from v4: Use GUEST_RAM_BASE as the start physical address of guest

RAM. And, purge set-memory-map patch

 

Singed-off-by: Evgeny Fedotov <e.fedotov@samsung.com>

---

xen/arch/arm/mm.c        | 22 +++++++++++++++++++++-

xen/include/asm-arm/mm.h |  2 ++

2 files changed, 23 insertions(+), 1 deletion(-)

 

diff --git a/xen/arch/arm/mm.c b/xen/arch/arm/mm.c

index 123280e..3801f07 100644

--- a/xen/arch/arm/mm.c

+++ b/xen/arch/arm/mm.c

@@ -927,7 +927,11 @@ int page_is_ram_type(unsigned long mfn, unsigned long
mem_type)

 

unsigned long domain_get_maximum_gpfn(struct domain *d)

{

-    return -ENOSYS;

+    paddr_t end;

+

+    get_gma_start_end(d, NULL, &end);

+

+    return (unsigned long) (end >> PAGE_SHIFT);

}

 

void share_xen_page_with_guest(struct page_info *page,

@@ -1308,6 +1312,22 @@ int is_iomem_page(unsigned long mfn)

         return 1;

     return 0;

}

+

+/* Guest RAM base */

+#define GUEST_RAM_BASE 0x80000000

+/*

+ *  XXX: Use correct definition for RAM base when the following patch

+ *  xen: arm: 64-bit guest support and domU FDT autogeneration

+ *  will be upstreamed.

+ */

+void get_gma_start_end(struct domain *d, paddr_t *start, paddr_t *end)

+{

+    if ( start )

+        *start = GUEST_RAM_BASE;

+    if ( end )

+        *end = GUEST_RAM_BASE + ((paddr_t) d->max_pages << PAGE_SHIFT);

+}

+

/*

  * Local variables:

  * mode: C

diff --git a/xen/include/asm-arm/mm.h b/xen/include/asm-arm/mm.h

index ce66099..c5cb3af 100644

--- a/xen/include/asm-arm/mm.h

+++ b/xen/include/asm-arm/mm.h

@@ -341,6 +341,8 @@ static inline void put_page_and_type(struct page_info
*page)

     put_page(page);

}

 

+void get_gma_start_end(struct domain *d, paddr_t *start, paddr_t *end);

+

#endif /*  __ARCH_ARM_MM__ */

/*

  * Local variables:

--

1.8.1.2


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