[v1] x86, KVM changes for 2023-10-26

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

Paolo Bonzini posted 24 patches 1 year, 1 month ago

Diff against v1
Download mbox

Maintainers: Paolo Bonzini <pbonzini@redhat.com>, Richard Henderson <richard.henderson@linaro.org>, Eduardo Habkost <eduardo@habkost.net>, "Michael S. Tsirkin" <mst@redhat.com>, Marcel Apfelbaum <marcel.apfelbaum@gmail.com>, Peter Maydell <peter.maydell@linaro.org>, Cornelia Huck <cohuck@redhat.com>, Halil Pasic <pasic@linux.ibm.com>, Eric Farman <farman@linux.ibm.com>, Christian Borntraeger <borntraeger@linux.ibm.com>, David Hildenbrand <david@redhat.com>, Ilya Leoshkevich <iii@linux.ibm.com>, Thomas Huth <thuth@redhat.com>, Peter Xu <peterx@redhat.com>, "Philippe Mathieu-Daudé" <philmd@linaro.org>, Marcelo Tosatti <mtosatti@redhat.com>, Palmer Dabbelt <palmer@dabbelt.com>, Alistair Francis <alistair.francis@wdc.com>, Bin Meng <bin.meng@windriver.com>, Weiwei Li <liweiwei@iscas.ac.cn>, Daniel Henrique Barboza <dbarboza@ventanamicro.com>, Liu Zhiwei <zhiwei_liu@linux.alibaba.com>

There is a newer version of this series

Expand all Fold all

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

Posted by Paolo Bonzini 1 year, 1 month ago

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 --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;
-- 
2.41.0