# HG changeset patch
# User Ian Campbell <ian.campbell@xxxxxxxxxxxxx>
# Node ID 708b915caf78fdcb8ebddf0300aaa2b4b0dfbb86
# Parent bb8d13705aaca58a9f5254e30071c2254d9c7737
[XEN] Revert changes to dom0 domain builder made by cset 11226.
We require that the dom0 domain builder still sets _PAGE_USER.
Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxxxxx>
---
xen/arch/x86/domain_build.c | 11 +++++++++--
1 files changed, 9 insertions(+), 2 deletions(-)
diff -r bb8d13705aac -r 708b915caf78 xen/arch/x86/domain_build.c
--- a/xen/arch/x86/domain_build.c Tue Aug 22 15:55:43 2006 +0100
+++ b/xen/arch/x86/domain_build.c Tue Aug 22 18:47:29 2006 +0100
@@ -66,11 +66,15 @@ static char opt_dom0_ioports_disable[200
static char opt_dom0_ioports_disable[200] = "";
string_param("dom0_ioports_disable", opt_dom0_ioports_disable);
+#if defined(__i386__)
+/* No ring-3 access in initial leaf page tables. */
#define L1_PROT (_PAGE_PRESENT|_PAGE_RW|_PAGE_ACCESSED)
#define L2_PROT (_PAGE_PRESENT|_PAGE_RW|_PAGE_ACCESSED|_PAGE_DIRTY|_PAGE_USER)
-#if CONFIG_PAGING_LEVELS == 3
#define L3_PROT (_PAGE_PRESENT)
-#elif CONFIG_PAGING_LEVELS == 4
+#elif defined(__x86_64__)
+/* Allow ring-3 access in long mode as guest cannot use ring 1. */
+#define L1_PROT (_PAGE_PRESENT|_PAGE_RW|_PAGE_ACCESSED|_PAGE_USER)
+#define L2_PROT (_PAGE_PRESENT|_PAGE_RW|_PAGE_ACCESSED|_PAGE_DIRTY|_PAGE_USER)
#define L3_PROT (_PAGE_PRESENT|_PAGE_RW|_PAGE_ACCESSED|_PAGE_DIRTY|_PAGE_USER)
#define L4_PROT (_PAGE_PRESENT|_PAGE_RW|_PAGE_ACCESSED|_PAGE_DIRTY|_PAGE_USER)
#endif
@@ -697,7 +701,9 @@ int construct_dom0(struct domain *d,
{
p += strlen("HYPERCALL_PAGE=");
hypercall_page = simple_strtoul(p, NULL, 16);
+ printk("(1) hypercall page is %#lx\n", hypercall_page);
hypercall_page = dsi.v_start + (hypercall_page << PAGE_SHIFT);
+ printk("(2) hypercall page is %#lx dsi.v_start is %#lx\n",
hypercall_page, dsi.v_start);
if ( (hypercall_page < dsi.v_start) || (hypercall_page >= v_end) )
{
write_ptbase(current);
@@ -706,6 +712,7 @@ int construct_dom0(struct domain *d,
return -1;
}
+ printk("(3) hypercall page is %#lx\n", hypercall_page);
hypercall_page_initialise(d, (void *)hypercall_page);
}
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