For 64 bit processor, emulate 40 bits physical address if the host physical
address space >= 40bits, else guest physical is same as host.
Signed-off-by: Xudong Hao <xudong.hao@xxxxxxxxx>
---
target-i386/cpu.c | 5 ++++-
1 files changed, 4 insertions(+), 1 deletions(-)
diff --git a/target-i386/cpu.c b/target-i386/cpu.c
index 423e009..3a78881 100644
--- a/target-i386/cpu.c
+++ b/target-i386/cpu.c
@@ -1584,7 +1584,10 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
if (env->cpuid_ext2_features & CPUID_EXT2_LM) {
/* 64 bit processor */
/* XXX: The physical address space is limited to 42 bits in exec.c. */
- *eax = 0x00003028; /* 48 bits virtual, 40 bits physical */
+/* XXX: 40 bits physical if host physical address space >= 40 bits */
+ uint32_t a, b, c, d;
+ host_cpuid(0x80000008, 0, &a, &b, &c, &d);
+ *eax = a < 0x00003028 ? a : 0x00003028;
} else {
if (env->cpuid_features & CPUID_PSE36)
*eax = 0x00000024; /* 36 bits physical */
--
1.5.5
--
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