[PATCH] cpu/cpuid: check CPUID_PAE to determine 36 bit processor address space

[Ani Sinha <anisinha@redhat.com>]

PAE mode in x86 supports 36 bit address space. Check the PAE CPUID on the
guest processor and set phys_bits to 36 if PAE feature is set. This is in
addition to checking the presence of PSE36 CPUID feature for setting 36 bit
phys_bits.

Signed-off-by: Ani Sinha <anisinha@redhat.com>
---
 target/i386/cpu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Note: Not sure what tests I should be running in order to make sure I am
not breaking any guest OSes. Usual qtests pass.

diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 24ee67b42d..f3a5c99117 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -7375,7 +7375,7 @@ static void x86_cpu_realizefn(DeviceState *dev, Error **errp)
             return;
         }
 
-        if (env->features[FEAT_1_EDX] & CPUID_PSE36) {
+        if (env->features[FEAT_1_EDX] & (CPUID_PSE36 | CPUID_PAE)) {
             cpu->phys_bits = 36;
         } else {
             cpu->phys_bits = 32;
-- 
2.39.1