[MINI-OS PATCH 01/19] setup: add global pointer for struct hvm_start_info

[Juergen Gross <jgross@xxxxxxxx>]

Similar to start_info_ptr for PV provide hvm_start_info_ptr for PVH.

Add a generic function to set the pointer.

Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
---
 arch/x86/setup.c     | 20 +++++++++++++++++---
 include/hypervisor.h |  3 +++
 2 files changed, 20 insertions(+), 3 deletions(-)

diff --git a/arch/x86/setup.c b/arch/x86/setup.c
index ed28d940..2085ee5c 100644
--- a/arch/x86/setup.c
+++ b/arch/x86/setup.c
@@ -69,6 +69,11 @@ static inline void sse_init(void) {
 start_info_t *start_info_ptr;
 EXPORT_SYMBOL(start_info_ptr);
 
+static void set_info_ptr(start_info_t *ptr)
+{
+    start_info_ptr = ptr;
+}
+
 #define hpc_init()
 
 shared_info_t *map_shared_info(void)
@@ -123,6 +128,17 @@ static void print_start_of_day(void *p)
     printk("       stack: %p-%p\n", stack, stack + sizeof(stack));
 }
 #else
+
+/*
+ * This pointer holds a reference to the hvm_start_info struct.
+ */
+struct hvm_start_info *hvm_start_info_ptr;
+
+static void set_info_ptr(struct hvm_start_info *ptr)
+{
+    hvm_start_info_ptr = ptr;
+}
+
 static void hpc_init(void)
 {
     uint32_t eax, ebx, ecx, edx, base;
@@ -176,9 +192,7 @@ arch_init(void *par)
 {
        static char hello[] = "Bootstrapping...\n";
 
-#ifdef CONFIG_PARAVIRT
-       start_info_ptr = par;
-#endif
+       set_info_ptr(par);
 
        hpc_init();
        (void)HYPERVISOR_console_io(CONSOLEIO_write, strlen(hello), hello);
diff --git a/include/hypervisor.h b/include/hypervisor.h
index d199f039..93f1247f 100644
--- a/include/hypervisor.h
+++ b/include/hypervisor.h
@@ -33,6 +33,9 @@ extern start_info_t *start_info_ptr;
 
 #define start_info (*start_info_ptr)
 #else
+#include <xen/arch-x86/hvm/start_info.h>
+
+extern struct hvm_start_info *hvm_start_info_ptr;
 int hvm_get_parameter(int idx, uint64_t *value);
 int hvm_set_parameter(int idx, uint64_t value);
 #endif
-- 
2.43.0