[PATCH] x86/mtrr: Drop workaround for old 32bit CPUs

[Andrew Cooper <andrew.cooper3@citrix.com>]

This logic is dead as Xen is 64bit-only these days.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
---
CC: Jan Beulich <JBeulich@suse.com>
CC: Wei Liu <wl@xen.org>
CC: Roger Pau Monné <roger.pau@citrix.com>
---
 xen/arch/x86/cpu/mtrr/generic.c | 17 -----------------
 1 file changed, 17 deletions(-)

diff --git a/xen/arch/x86/cpu/mtrr/generic.c b/xen/arch/x86/cpu/mtrr/generic.c
index 89634f918f..06fa0c0420 100644
--- a/xen/arch/x86/cpu/mtrr/generic.c
+++ b/xen/arch/x86/cpu/mtrr/generic.c
@@ -570,23 +570,6 @@ int generic_validate_add_page(unsigned long base, unsigned long size, unsigned i
 {
 	unsigned long lbase, last;
 
-	/*  For Intel PPro stepping <= 7, must be 4 MiB aligned 
-	    and not touch 0x70000000->0x7003FFFF */
-	if (is_cpu(INTEL) && boot_cpu_data.x86 == 6 &&
-	    boot_cpu_data.x86_model == 1 &&
-	    boot_cpu_data.x86_mask <= 7) {
-		if (base & ((1 << (22 - PAGE_SHIFT)) - 1)) {
-			printk(KERN_WARNING "mtrr: base(%#lx000) is not 4 MiB aligned\n", base);
-			return -EINVAL;
-		}
-		if (!(base + size < 0x70000 || base > 0x7003F) &&
-		    (type == MTRR_TYPE_WRCOMB
-		     || type == MTRR_TYPE_WRBACK)) {
-			printk(KERN_WARNING "mtrr: writable mtrr between 0x70000000 and 0x7003FFFF may hang the CPU.\n");
-			return -EINVAL;
-		}
-	}
-
 	/*  Check upper bits of base and last are equal and lower bits are 0
 	    for base and 1 for last  */
 	last = base + size - 1;
-- 
2.11.0