[Xen-devel,v3,53/62] arm/acpi: Map the new created EFI and ACPI tables to Dom0

Message ID 1447753261-7552-54-git-send-email-shannon.zhao@linaro.org
State New
Headers show

Commit Message

Shannon Zhao Nov. 17, 2015, 9:40 a.m.
From: Shannon Zhao <shannon.zhao@linaro.org>


Here we map these new created EFI and ACPI tables to the non-RAM space
of Dom0. Then Dom0 could visit them.

Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org>

---
 xen/arch/arm/domain_build.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

-- 
2.1.0


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Patch

diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c
index 073c634..55f85b4 100644
--- a/xen/arch/arm/domain_build.c
+++ b/xen/arch/arm/domain_build.c
@@ -1740,6 +1740,21 @@  static int prepare_acpi(struct domain *d, struct kernel_info *kinfo)
     acpi_create_efi_mmap_table(d->arch.efi_acpi_gpa, d->arch.efi_acpi_table,
                                &kinfo->mem, tbl_add);
 
+    /* Map the EFI and ACPI tables to Dom0 */
+    rc = map_regions(d,
+                     paddr_to_pfn(d->arch.efi_acpi_gpa),
+                     DIV_ROUND_UP(d->arch.efi_acpi_len, PAGE_SIZE),
+                     paddr_to_pfn(virt_to_maddr(d->arch.efi_acpi_table)));
+    if ( rc != 0 )
+    {
+        printk(XENLOG_ERR "Unable to map 0x%"PRIx64
+               " - 0x%"PRIx64" in domain %d\n",
+               d->arch.efi_acpi_gpa & PAGE_MASK,
+               PAGE_ALIGN(d->arch.efi_acpi_gpa + d->arch.efi_acpi_len) - 1,
+               d->domain_id);
+        return rc;
+    }
+
     return 0;
 }
 #else