[Xen-devel] [PATCH v3 05/16] xen/arm: domain_build: Redefine virt_to_mfn to support typesafe

[Julien Grall <julien.grall@xxxxxxx>]

The file xen/arch/arm/domain_build.c is using typesafe MFN in most of
the place. The only caller to virt_to_mfn is using prefixed with
_mfn(...).

To avoid extra _mfn(...), re-define virt_to_mfn within
arch/arm/domain_build.c to handle typesafe MFN.

Signed-off-by: Julien Grall <julien.grall@xxxxxxx>
Reviewed-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
---
    Changes in v2:
        - Add Stefano's reviewed-by
---
 xen/arch/arm/domain_build.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c
index c6776d76fc..1bec4fa23d 100644
--- a/xen/arch/arm/domain_build.c
+++ b/xen/arch/arm/domain_build.c
@@ -45,6 +45,10 @@ struct map_range_data
     p2m_type_t p2mt;
 };
 
+/* Override macros from asm/page.h to make them work with mfn_t */
+#undef virt_to_mfn
+#define virt_to_mfn(va) _mfn(__virt_to_mfn(va))
+
 //#define DEBUG_11_ALLOCATION
 #ifdef DEBUG_11_ALLOCATION
 # define D11PRINT(fmt, args...) printk(XENLOG_DEBUG fmt, ##args)
@@ -1903,7 +1907,7 @@ static int prepare_acpi(struct domain *d, struct 
kernel_info *kinfo)
     rc = map_regions_p2mt(d,
                           gaddr_to_gfn(d->arch.efi_acpi_gpa),
                           PFN_UP(d->arch.efi_acpi_len),
-                          _mfn(virt_to_mfn(d->arch.efi_acpi_table)),
+                          virt_to_mfn(d->arch.efi_acpi_table),
                           p2m_mmio_direct_c);
     if ( rc != 0 )
     {
-- 
2.11.0


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