File 537cd0cc-hvmloader-PA-range-0xfc000000-0xffffff... of Package xen

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File 537cd0cc-hvmloader-PA-range-0xfc000000-0xffffffff-should-be-UC.patch of Package xen (Revision fef3bdb667ac50a788ba759aad375a35)

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# Commit c22bd567ce22f6ad9bd93318ad0d7fd1c2eadb0d
# Date 2014-05-21 18:14:04 +0200
# Author Jan Beulich <jbeulich@suse.com>
# Committer Jan Beulich <jbeulich@suse.com>
hvmloader: PA range 0xfc000000-0xffffffff should be UC

Rather than leaving the range from PCI_MEM_END (0xfc000000) to 4G
uncovered, we should include this in the UC range created for the (low)
PCI range. Besides being more correct, this also has the advantage that
with the way pci_setup() currently works the range will always be
mappable with a single variable range MTRR (rather than from 2 to 5
depending on how much the lower boundary gets shifted down to
accommodate all devices).

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>

--- a/tools/firmware/hvmloader/cacheattr.c
+++ b/tools/firmware/hvmloader/cacheattr.c
@@ -99,12 +99,12 @@ void cacheattr_init(void)
     {
         uint64_t base = pci_mem_start, size;
 
-        for ( i = 0; (base != pci_mem_end) && (i < nr_var_ranges); i++ )
+        for ( i = 0; !(base >> 32) && (i < nr_var_ranges); i++ )
         {
             size = PAGE_SIZE;
             while ( !(base & size) )
                 size <<= 1;
-            while ( ((base + size) < base) || ((base + size) > pci_mem_end) )
+            while ( ((base + size) < base) || ((base + size - 1) >> 32) )
                 size >>= 1;
 
             wrmsr(MSR_MTRRphysBase(i), base);

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File 537cd0cc-hvmloader-PA-range-0xfc000000-0xffffffff-should-be-UC.patch of Package xen (Revision fef3bdb667ac50a788ba759aad375a35)

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