linux-user: remove --enable-guest-base/--disable-guest-base

All tcg host architectures now support the guest base and as
there is no real performance lost, it can be always enabled.

Anyway, guest base use can be disabled lively by setting guest
base to 0.

CONFIG_USE_GUEST_BASE is defined as (USE_GUEST_BASE && USER_ONLY),
it should have to be replaced by CONFIG_USER_ONLY in non CONFIG_USER_ONLY
parts, but as some other parts are using !CONFIG_SOFTMMU I have chosen to
use !CONFIG_SOFTMMU instead.

Reviewed-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <1440373328-9788-2-git-send-email-laurent@vivier.eu>
Signed-off-by: Richard Henderson <rth@twiddle.net>

5 files changed, 8 insertions, 18 deletions

diff --git a/tcg/aarch64/tcg-target.c b/tcg/aarch64/tcg-target.c
index bc3a539836..b0ddcf2f08 100644
--- a/tcg/aarch64/tcg-target.c
+++ b/tcg/aarch64/tcg-target.c
@@ -56,11 +56,7 @@ static const int tcg_target_call_oarg_regs[1] = {
 #define TCG_REG_TMP TCG_REG_X30
 
 #ifndef CONFIG_SOFTMMU
-# ifdef CONFIG_USE_GUEST_BASE
-#  define TCG_REG_GUEST_BASE TCG_REG_X28
-# else
-#  define TCG_REG_GUEST_BASE TCG_REG_XZR
-# endif
+#define TCG_REG_GUEST_BASE TCG_REG_X28
 #endif
 
 static inline void reloc_pc26(tcg_insn_unit *code_ptr, tcg_insn_unit *target)
@@ -1809,7 +1805,7 @@ static void tcg_target_qemu_prologue(TCGContext *s)
     tcg_set_frame(s, TCG_REG_SP, TCG_STATIC_CALL_ARGS_SIZE,
                   CPU_TEMP_BUF_NLONGS * sizeof(long));
 
-#if defined(CONFIG_USE_GUEST_BASE)
+#if !defined(CONFIG_SOFTMMU)
     if (GUEST_BASE) {
         tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_GUEST_BASE, GUEST_BASE);
         tcg_regset_set_reg(s->reserved_regs, TCG_REG_GUEST_BASE);
diff --git a/tcg/ia64/tcg-target.c b/tcg/ia64/tcg-target.c
index 71e79cfbbc..64b5cb6d97 100644
--- a/tcg/ia64/tcg-target.c
+++ b/tcg/ia64/tcg-target.c
@@ -40,10 +40,8 @@ static const char * const tcg_target_reg_names[TCG_TARGET_NB_REGS] = {
 };
 #endif
 
-#ifdef CONFIG_USE_GUEST_BASE
+#ifndef CONFIG_SOFTMMU
 #define TCG_GUEST_BASE_REG TCG_REG_R55
-#else
-#define TCG_GUEST_BASE_REG TCG_REG_R0
 #endif
 #ifndef GUEST_BASE
 #define GUEST_BASE 0
diff --git a/tcg/ppc/tcg-target.c b/tcg/ppc/tcg-target.c
index 1672220739..36a97a711c 100644
--- a/tcg/ppc/tcg-target.c
+++ b/tcg/ppc/tcg-target.c
@@ -89,10 +89,8 @@ static bool have_isa_2_06;
 #define HAVE_ISA_2_06  have_isa_2_06
 #define HAVE_ISEL      have_isa_2_06
 
-#ifdef CONFIG_USE_GUEST_BASE
+#ifndef CONFIG_SOFTMMU
 #define TCG_GUEST_BASE_REG 30
-#else
-#define TCG_GUEST_BASE_REG 0
 #endif
 
 #ifndef NDEBUG
@@ -1800,7 +1798,7 @@ static void tcg_target_qemu_prologue(TCGContext *s)
     }
     tcg_out_st(s, TCG_TYPE_PTR, TCG_REG_R0, TCG_REG_R1, FRAME_SIZE+LR_OFFSET);
 
-#ifdef CONFIG_USE_GUEST_BASE
+#ifndef CONFIG_SOFTMMU
     if (GUEST_BASE) {
         tcg_out_movi(s, TCG_TYPE_PTR, TCG_GUEST_BASE_REG, GUEST_BASE);
         tcg_regset_set_reg(s->reserved_regs, TCG_GUEST_BASE_REG);
diff --git a/tcg/s390/tcg-target.c b/tcg/s390/tcg-target.c
index be51c8b668..2091bebb44 100644
--- a/tcg/s390/tcg-target.c
+++ b/tcg/s390/tcg-target.c
@@ -51,7 +51,7 @@
 /* A scratch register that may be be used throughout the backend.  */
 #define TCG_TMP0        TCG_REG_R14
 
-#ifdef CONFIG_USE_GUEST_BASE
+#ifndef CONFIG_SOFTMMU
 #define TCG_GUEST_BASE_REG TCG_REG_R13
 #else
 #define TCG_GUEST_BASE_REG TCG_REG_R0
diff --git a/tcg/sparc/tcg-target.c b/tcg/sparc/tcg-target.c
index 87f9bcca4b..b573e0da19 100644
--- a/tcg/sparc/tcg-target.c
+++ b/tcg/sparc/tcg-target.c
@@ -83,10 +83,8 @@ static const char * const tcg_target_reg_names[TCG_TARGET_NB_REGS] = {
 #define TCG_REG_T1  TCG_REG_G1
 #define TCG_REG_T2  TCG_REG_O7
 
-#ifdef CONFIG_USE_GUEST_BASE
+#ifndef CONFIG_SOFTMMU
 # define TCG_GUEST_BASE_REG TCG_REG_I5
-#else
-# define TCG_GUEST_BASE_REG TCG_REG_G0
 #endif
 
 static const int tcg_target_reg_alloc_order[] = {
@@ -955,7 +953,7 @@ static void tcg_target_qemu_prologue(TCGContext *s)
     tcg_out32(s, SAVE | INSN_RD(TCG_REG_O6) | INSN_RS1(TCG_REG_O6) |
               INSN_IMM13(-frame_size));
 
-#ifdef CONFIG_USE_GUEST_BASE
+#ifndef CONFIG_SOFTMMU
     if (GUEST_BASE != 0) {
         tcg_out_movi(s, TCG_TYPE_PTR, TCG_GUEST_BASE_REG, GUEST_BASE);
         tcg_regset_set_reg(s->reserved_regs, TCG_GUEST_BASE_REG);