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configure: Define target access alignment in configure

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This patch moves the define of target access alignment earlier from
target/foo/cpu.h to configure.

Suggested in Richard Henderson's reply to "[PATCH 1/4] tcg: TCGMemOp is now
accelerator independent MemOp"

Backports commit 52bf9771fdfce98e98cea36a17a18915be6f6b7f from qemu
This commit is contained in:
tony.nguyen@bt.com 2019-11-18 21:41:23 -05:00 committed by Lioncash
parent c041f5f2cc
commit b4c2c94602
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GPG key ID: 4E3C3CC1031BA9C7
5 changed files with 16 additions and 10 deletions
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12
qemu/configure vendored
View file

@ -1634,11 +1634,16 @@ for target in $target_list; do
target_dir="$target"
config_target_mak=$target_dir/config-target.mak
target_name=$(echo $target | cut -d '-' -f 1)
target_aligned_only="no"
case "$target_name" in
alpha|hppa|mips64el|mips64|mipsel|mips|mipsn32|mipsn32el|sh4|sh4eb|sparc|sparc64|sparc32plus|xtensa|xtensaeb)
target_aligned_only="yes"
;;
esac
target_bigendian="no"
case "$target_name" in
aarch64eb|armeb|lm32|m68k|microblaze|mips|mipsn32|mips64|moxie|or32|ppc|ppcemb|ppc64|ppc64abi32|s390x|sh4eb|sparc|sparc64|sparc32plus|xtensaeb)
target_bigendian=yes
target_bigendian="yes"
;;
esac
target_softmmu="yes"
@ -1779,6 +1784,9 @@ target_arch_name="$(upper $TARGET_ARCH)"
echo "TARGET_$target_arch_name=y" >> $config_target_mak
echo "TARGET_NAME=$target_name" >> $config_target_mak
echo "TARGET_BASE_ARCH=$TARGET_BASE_ARCH" >> $config_target_mak
if test "$target_aligned_only" = "yes" ; then
echo "TARGET_ALIGNED_ONLY=y" >> $config_target_mak
fi
if test "$target_bigendian" = "yes" ; then
echo "TARGET_WORDS_BIGENDIAN=y" >> $config_target_mak
fi

2
qemu/include/qom/cpu.h
View file

@ -86,7 +86,7 @@ struct TranslationBlock;
* @do_unassigned_access: Callback for unassigned access handling.
* (this is deprecated: new targets should use do_transaction_failed instead)
* @do_unaligned_access: Callback for unaligned access handling, if
* the target defines #ALIGNED_ONLY.
* the target defines #TARGET_ALIGNED_ONLY.
* @do_transaction_failed: Callback for handling failed memory transactions
* (ie bus faults or external aborts; not MMU faults)
* @memory_rw_debug: Callback for GDB memory access.

2
qemu/target/mips/cpu.h
View file

@ -1,8 +1,6 @@
#ifndef MIPS_CPU_H
#define MIPS_CPU_H
#define ALIGNED_ONLY
#include "config.h"
#include "qemu-common.h"
#include "cpu-qom.h"

2
qemu/target/sparc/cpu.h
View file

@ -6,8 +6,6 @@
#include "cpu-qom.h"
#include "exec/cpu-defs.h"
#define ALIGNED_ONLY
#if !defined(TARGET_SPARC64)
#define TARGET_DPREGS 16
#else

8
qemu/tcg/tcg.h
View file

@ -341,10 +341,12 @@ typedef enum TCGMemOp {
MO_TE = MO_LE,
#endif
/* MO_UNALN accesses are never checked for alignment.
/*
* MO_UNALN accesses are never checked for alignment.
* MO_ALIGN accesses will result in a call to the CPU's
* do_unaligned_access hook if the guest address is not aligned.
* The default depends on whether the target CPU defines ALIGNED_ONLY.
* The default depends on whether the target CPU defines
* TARGET_ALIGNED_ONLY.
*
* Some architectures (e.g. ARMv8) need the address which is aligned
* to a size more than the size of the memory access.
@ -361,7 +363,7 @@ typedef enum TCGMemOp {
*/
MO_ASHIFT = 4,
MO_AMASK = 7 << MO_ASHIFT,
#ifdef ALIGNED_ONLY
#ifdef TARGET_ALIGNED_ONLY
MO_ALIGN = 0,
MO_UNALN = MO_AMASK,
#else