xen: arm: support building a 64-bit dom0 domain

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>

xen/arch/arm/domain_build.c

@@ -589,9 +589,7 @@ int construct_dom0(struct domain *d)
 
     memset(regs, 0, sizeof(*regs));
 
-    regs->pc = (uint32_t)kinfo.entry;
-
-    regs->cpsr = PSR_GUEST_INIT;
+    regs->pc = (register_t)kinfo.entry;
 
 #ifdef CONFIG_ARM_64
     d->arch.type = kinfo.type;
@@ -599,6 +597,11 @@ int construct_dom0(struct domain *d)
 
     if ( is_pv32_domain(d) )
     {
+        regs->cpsr = PSR_GUEST_INIT|PSR_MODE_SVC;
+
+        /* Pretend to be a Cortex A15 */
+        d->arch.vpidr = 0x410fc0f0;
+
         /* FROM LINUX head.S
          *
          * Kernel startup entry point.
@@ -616,6 +619,7 @@ int construct_dom0(struct domain *d)
 #ifdef CONFIG_ARM_64
     else
     {
+        regs->cpsr = PSR_GUEST_INIT|PSR_MODE_EL1h;
         /* From linux/Documentation/arm64/booting.txt */
         regs->x0 = kinfo.dtb_paddr;
         regs->x1 = 0; /* Reserved for future use */

xen/include/asm-arm/processor.h

@@ -46,6 +46,8 @@
 #define SCTLR_BASE        0x00c50078
 #define HSCTLR_BASE       0x30c51878
 
+#define PSR_GUEST_INIT  (PSR_ABT_MASK|PSR_FIQ_MASK|PSR_IRQ_MASK)
+
 /* HCR Hyp Configuration Register */
 #define HCR_TGE         (1<<27)
 #define HCR_TVM         (1<<26)

xen/include/public/arch-arm.h

@@ -237,8 +237,6 @@ typedef uint64_t xen_callback_t;
 #define PSR_IT_MASK     (0x0600fc00)  /* Thumb If-Then Mask */
 #define PSR_JAZELLE     (1<<24)       /* Jazelle Mode */
 
-#define PSR_GUEST_INIT  (PSR_ABT_MASK|PSR_FIQ_MASK|PSR_IRQ_MASK|PSR_MODE_SVC)
-
 #endif /*  __XEN_PUBLIC_ARCH_ARM_H__ */
 
 /*