xen/arm: vpl011: Allocate a new GFN in the toolstack for vuart

Allocate a new gfn to be used as a ring buffer between xenconsole
and Xen for sending/receiving pl011 console data.

Signed-off-by: Bhupinder Thakur <bhupinder.thakur@linaro.org>
Acked-by: Stefano Stabellini <sstabellini@kernel.org>
Acked-by: Wei Liu <wei.liu2@citrix.com>

diff --git a/tools/libxc/include/xc_dom.h b/tools/libxc/include/xc_dom.h
index ce47058c41db6d57863dda3024ec8e75cdf00641..6e06ef1dec974776562b71f432cb195ee2c51dc4 100644 (file)
--- a/tools/libxc/include/xc_dom.h
+++ b/tools/libxc/include/xc_dom.h
@@ -216,6 +216,8 @@ struct xc_dom_image {
 
     /* Extra SMBIOS structures passed to HVMLOADER */
     struct xc_hvm_firmware_module smbios_module;
+
+    xen_pfn_t vuart_gfn;
 };
 
 /* --- pluggable kernel loader ------------------------------------- */

diff --git a/tools/libxc/xc_dom_arm.c b/tools/libxc/xc_dom_arm.c
index e669fb043b6aa7d2fbfbc78e6632fd3c92917a70..98200ae26eca6f0080fa66a331027462bfc0ce14 100644 (file)
--- a/tools/libxc/xc_dom_arm.c
+++ b/tools/libxc/xc_dom_arm.c
@@ -26,10 +26,11 @@
 #include "xg_private.h"
 #include "xc_dom.h"
 
-#define NR_MAGIC_PAGES 3
+#define NR_MAGIC_PAGES 4
 #define CONSOLE_PFN_OFFSET 0
 #define XENSTORE_PFN_OFFSET 1
 #define MEMACCESS_PFN_OFFSET 2
+#define VUART_PFN_OFFSET 3
 
 #define LPAE_SHIFT 9
 
@@ -85,10 +86,12 @@ static int alloc_magic_pages(struct xc_dom_image *dom)
 
     dom->console_pfn = base + CONSOLE_PFN_OFFSET;
     dom->xenstore_pfn = base + XENSTORE_PFN_OFFSET;
+    dom->vuart_gfn = base + VUART_PFN_OFFSET;
 
     xc_clear_domain_page(dom->xch, dom->guest_domid, dom->console_pfn);
     xc_clear_domain_page(dom->xch, dom->guest_domid, dom->xenstore_pfn);
     xc_clear_domain_page(dom->xch, dom->guest_domid, base + MEMACCESS_PFN_OFFSET);
+    xc_clear_domain_page(dom->xch, dom->guest_domid, base + VUART_PFN_OFFSET);
     xc_hvm_param_set(dom->xch, dom->guest_domid, HVM_PARAM_CONSOLE_PFN,
             dom->console_pfn);
     xc_hvm_param_set(dom->xch, dom->guest_domid, HVM_PARAM_STORE_PFN,

diff --git a/tools/libxc/xc_dom_boot.c b/tools/libxc/xc_dom_boot.c
index c3b44dd399aefbc2a2c79aee067843e5991e0798..8a376d097cd7d59a69846be448c5cbc23252075d 100644 (file)
--- a/tools/libxc/xc_dom_boot.c
+++ b/tools/libxc/xc_dom_boot.c
@@ -226,6 +226,8 @@ int xc_dom_boot_image(struct xc_dom_image *dom)
         return rc;
     if ( (rc = clear_page(dom, dom->xenstore_pfn)) != 0 )
         return rc;
+    if ( (rc = clear_page(dom, dom->vuart_gfn)) != 0 )
+        return rc;
 
     /* start info page */
     if ( dom->arch_hooks->start_info )