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target-i386: set target_phys_bits to 64

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qemu i386 used to support more than 4GB of RAM through PAE, but it has
been disabled for an unknown reason. Reenable it.

Note that simply running qemu x86_64 and emulating a 32-bit CPU is not
a solution to this problem as it is about 15% slower (it needs to
emulate 64 bit registers even if half of them are not used). On the
other hand, I haven't seen any measurable impact by switching
target_phys_bits to 64.

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Aurelien Jarno 2011-02-09 19:35:50 +01:00
parent 0899965f68
commit 71deff2749
1 changed files with 1 additions and 1 deletions
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2
configure vendored
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@ -2973,7 +2973,7 @@ TARGET_ABI_DIR=""
case "$target_arch2" in
i386)
target_phys_bits=32
target_phys_bits=64
;;
x86_64)
TARGET_BASE_ARCH=i386