[Xen-changelog] [xen master] xen/arm: vpl011: Allocate a new GFN in the toolstack for vuart

[patchbot@xxxxxxx]

commit 2f39ac0236bab642545d670c65aefa762e1c523e
Author:     Bhupinder Thakur <bhupinder.thakur@xxxxxxxxxx>
AuthorDate: Wed Sep 27 11:43:12 2017 +0530
Commit:     Stefano Stabellini <sstabellini@xxxxxxxxxx>
CommitDate: Tue Oct 3 11:36:34 2017 -0700

    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@xxxxxxxxxx>
    Acked-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
    Acked-by: Wei Liu <wei.liu2@xxxxxxxxxx>
---
 tools/libxc/include/xc_dom.h | 2 ++
 tools/libxc/xc_dom_arm.c     | 5 ++++-
 tools/libxc/xc_dom_boot.c    | 2 ++
 3 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/tools/libxc/include/xc_dom.h b/tools/libxc/include/xc_dom.h
index ce47058..6e06ef1 100644
--- 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 e669fb0..98200ae 100644
--- 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 c3b44dd..8a376d0 100644
--- 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 )
--
generated by git-patchbot for /home/xen/git/xen.git#master

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