From d83005424774fcfb85aec76effac169cadb375fd Mon Sep 17 00:00:00 2001
From: Ani Sinha <anisinha@redhat.com>
Date: Tue, 12 Sep 2023 17:36:50 +0530
Subject: [PATCH] target/i386: check CPUID_PAE to determine 36 bit processor
address space
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>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Message-ID: <20230912120650.371781-1-anisinha@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
target/i386/cpu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 070c02000f..fc8484cb5e 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -7377,7 +7377,7 @@ 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;