From 4dbc422b55858f6465c38dd0d1b9fbeac856ff43 Mon Sep 17 00:00:00 2001
From: bellard <bellard@c046a42c-6fe2-441c-8c8c-71466251a162>
Date: Thu, 15 Nov 2007 15:27:03 +0000
Subject: x86_64 fixes

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3650 c046a42c-6fe2-441c-8c8c-71466251a162
---
 linux-user/main.c | 25 ++++++++++++++-----------
 1 file changed, 14 insertions(+), 11 deletions(-)

diff --git a/linux-user/main.c b/linux-user/main.c
index cfe2a0e36..bfb270b2d 100644
--- a/linux-user/main.c
+++ b/linux-user/main.c
@@ -153,14 +153,14 @@ uint64_t idt_table[512];
 static void set_gate64(void *ptr, unsigned int type, unsigned int dpl,
                        uint64_t addr, unsigned int sel)
 {
-    unsigned int e1, e2;
-    uint32_t *p;
+    uint32_t *p, e1, e2;
     e1 = (addr & 0xffff) | (sel << 16);
     e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);
     p = ptr;
-    p[0] = tswapl(e1);
-    p[1] = tswapl(e2);
-    p[2] = addr >> 32;
+    p[0] = tswap32(e1);
+    p[1] = tswap32(e2);
+    p[2] = tswap32(addr >> 32);
+    p[3] = 0;
 }
 /* only dpl matters as we do only user space emulation */
 static void set_idt(int n, unsigned int dpl)
@@ -173,13 +173,12 @@ uint64_t idt_table[256];
 static void set_gate(void *ptr, unsigned int type, unsigned int dpl,
                      uint32_t addr, unsigned int sel)
 {
-    unsigned int e1, e2;
-    uint32_t *p;
+    uint32_t *p, e1, e2;
     e1 = (addr & 0xffff) | (sel << 16);
     e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);
     p = ptr;
-    p[0] = tswapl(e1);
-    p[1] = tswapl(e2);
+    p[0] = tswap32(e1);
+    p[1] = tswap32(e2);
 }
 
 /* only dpl matters as we do only user space emulation */
@@ -2113,9 +2112,13 @@ int main(int argc, char **argv)
         env->hflags |= HF_OSFXSR_MASK;
     }
 #ifndef TARGET_ABI32
-    /* enable 64 bit mode */
+    /* enable 64 bit mode if possible */
+    if (!(env->cpuid_ext2_features & CPUID_EXT2_LM)) {
+        fprintf(stderr, "The selected x86 CPU does not support 64 bit mode\n");
+        exit(1);
+    }
     env->cr[4] |= CR4_PAE_MASK;
-    env->efer |= MSR_EFER_LMA;
+    env->efer |= MSR_EFER_LMA | MSR_EFER_LME;
     env->hflags |= HF_LMA_MASK;
 #endif
 
-- 
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