PDX-es are 64 bits wide in that case, and hence no limit needs to be
enforced.
Reported-by: Andrew Cooper <andrew.coop...@citrix.com>
Signed-off-by: Jan Beulich <jbeul...@suse.com>
Reviewed-by: Andrew Cooper <andrew.coop...@citrix.com>
---
v2: Use "const unsigned int bits = 0" instead of #define / #undef
(as suggested by IanC).
--- unstable.orig/xen/arch/x86/domain.c 2015-09-22 12:54:38.000000000 +0200
+++ unstable/xen/arch/x86/domain.c 2015-08-26 09:24:28.000000000 +0200
@@ -204,6 +204,7 @@ smap_check_policy_t smap_policy_change(s
return old_policy;
}
+#ifndef CONFIG_BIGMEM
/*
* The hole may be at or above the 44-bit boundary, so we need to determine
* the total bit count until reaching 32 significant (not squashed out) bits
@@ -225,10 +226,14 @@ static unsigned int __init noinline _dom
return bits;
}
+#endif
struct domain *alloc_domain_struct(void)
{
struct domain *d;
+#ifdef CONFIG_BIGMEM
+ const unsigned int bits = 0;
+#else
/*
* We pack the PDX of the domain structure into a 32-bit field within
* the page_info structure. Hence the MEMF_bits() restriction.
@@ -237,6 +242,7 @@ struct domain *alloc_domain_struct(void)
if ( unlikely(!bits) )
bits = _domain_struct_bits();
+#endif
BUILD_BUG_ON(sizeof(*d) > PAGE_SIZE);
d = alloc_xenheap_pages(0, MEMF_bits(bits));
x86/bigmem: eliminate struct domain address width restriction
PDX-es are 64 bits wide in that case, and hence no limit needs to be
enforced.
Reported-by: Andrew Cooper <andrew.coop...@citrix.com>
Signed-off-by: Jan Beulich <jbeul...@suse.com>
Reviewed-by: Andrew Cooper <andrew.coop...@citrix.com>
---
v2: Use "const unsigned int bits = 0" instead of #define / #undef
(as suggested by IanC).
--- unstable.orig/xen/arch/x86/domain.c 2015-09-22 12:54:38.000000000 +0200
+++ unstable/xen/arch/x86/domain.c 2015-08-26 09:24:28.000000000 +0200
@@ -204,6 +204,7 @@ smap_check_policy_t smap_policy_change(s
return old_policy;
}
+#ifndef CONFIG_BIGMEM
/*
* The hole may be at or above the 44-bit boundary, so we need to determine
* the total bit count until reaching 32 significant (not squashed out) bits
@@ -225,10 +226,14 @@ static unsigned int __init noinline _dom
return bits;
}
+#endif
struct domain *alloc_domain_struct(void)
{
struct domain *d;
+#ifdef CONFIG_BIGMEM
+ const unsigned int bits = 0;
+#else
/*
* We pack the PDX of the domain structure into a 32-bit field within
* the page_info structure. Hence the MEMF_bits() restriction.
@@ -237,6 +242,7 @@ struct domain *alloc_domain_struct(void)
if ( unlikely(!bits) )
bits = _domain_struct_bits();
+#endif
BUILD_BUG_ON(sizeof(*d) > PAGE_SIZE);
d = alloc_xenheap_pages(0, MEMF_bits(bits));
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