diff mbox series

[PULL,07/24] target/i386: check CPUID_PAE to determine 36 bit processor address space

Message ID 20231025232718.89428-8-pbonzini@redhat.com
State New
Headers show
Series [PULL,01/24] tests/tcg: fix out-of-bounds access in test-avx | expand

Commit Message

Paolo Bonzini Oct. 25, 2023, 11:27 p.m. UTC 
From: 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>
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 mbox series

Patch

diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 070c02000fe..fc8484cb5e8 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;