Merge remote-tracking branch 'remotes/aperard/tags/pull-xen-20200804' into staging

xen patch

Bug fix.

# gpg: Signature made Tue 04 Aug 2020 10:24:51 BST
# gpg:                using RSA key F80C006308E22CFD8A92E7980CF5572FD7FB55AF
# gpg:                issuer "anthony.perard@citrix.com"
# gpg: Good signature from "Anthony PERARD <anthony.perard@gmail.com>" [marginal]
# gpg:                 aka "Anthony PERARD <anthony.perard@citrix.com>" [marginal]
# gpg: WARNING: This key is not certified with sufficiently trusted signatures!
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# Primary key fingerprint: 5379 2F71 024C 600F 778A  7161 D8D5 7199 DF83 42C8
#      Subkey fingerprint: F80C 0063 08E2 2CFD 8A92  E798 0CF5 572F D7FB 55AF

* remotes/aperard/tags/pull-xen-20200804:
  accel/xen: Fix xen_enabled() behavior on target-agnostic objects

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

accel/stubs/xen-stub.c

@@ -9,6 +9,8 @@
 #include "hw/xen/xen.h"
 #include "qapi/qapi-commands-misc.h"
 
+bool xen_allowed;
+
 void xenstore_store_pv_console_info(int i, Chardev *chr)
 {
 }

accel/xen/xen-all.c

@@ -32,12 +32,7 @@
     do { } while (0)
 #endif
 
-static bool xen_allowed;
-
-bool xen_enabled(void)
-{
-    return xen_allowed;
-}
+bool xen_allowed;
 
 xc_interface *xen_xc;
 xenforeignmemory_handle *xen_fmem;

include/sysemu/xen.h

@@ -8,9 +8,19 @@
 #ifndef SYSEMU_XEN_H
 #define SYSEMU_XEN_H
 
-#ifdef CONFIG_XEN
+#ifdef NEED_CPU_H
+# ifdef CONFIG_XEN
+#  define CONFIG_XEN_IS_POSSIBLE
+# endif
+#else
+# define CONFIG_XEN_IS_POSSIBLE
+#endif
+
+#ifdef CONFIG_XEN_IS_POSSIBLE
+
+extern bool xen_allowed;
 
-bool xen_enabled(void);
+#define xen_enabled()           (xen_allowed)
 
 #ifndef CONFIG_USER_ONLY
 void xen_hvm_modified_memory(ram_addr_t start, ram_addr_t length);
@@ -18,7 +28,7 @@ void xen_ram_alloc(ram_addr_t ram_addr, ram_addr_t size,
                    struct MemoryRegion *mr, Error **errp);
 #endif
 
-#else /* !CONFIG_XEN */
+#else /* !CONFIG_XEN_IS_POSSIBLE */
 
 #define xen_enabled() 0
 #ifndef CONFIG_USER_ONLY
@@ -33,6 +43,6 @@ static inline void xen_ram_alloc(ram_addr_t ram_addr, ram_addr_t size,
 }
 #endif
 
-#endif /* CONFIG_XEN */
+#endif /* CONFIG_XEN_IS_POSSIBLE */
 
 #endif