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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>
This commit is contained in:
Laurent Vivier 2015-08-24 01:42:07 +02:00 committed by Richard Henderson
parent 9ee14902bf
commit 4cbea59869
14 changed files with 9 additions and 68 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
bsd-user/elfload.c
View File

@ -1371,7 +1371,6 @@ int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs,
info->mmap = 0;
elf_entry = (abi_ulong) elf_ex.e_entry;
#if defined(CONFIG_USE_GUEST_BASE)
/*
* In case where user has not explicitly set the guest_base, we
* probe here that should we set it automatically.
@ -1392,7 +1391,6 @@ int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs,
}
}
}
#endif /* CONFIG_USE_GUEST_BASE */
/* Do this so that we can load the interpreter, if need be. We will
change some of these later */

12
bsd-user/main.c
View File

@ -35,12 +35,10 @@
#include "qemu/envlist.h"
int singlestep;
#if defined(CONFIG_USE_GUEST_BASE)
unsigned long mmap_min_addr;
unsigned long guest_base;
int have_guest_base;
unsigned long reserved_va;
#endif
static const char *interp_prefix = CONFIG_QEMU_INTERP_PREFIX;
const char *qemu_uname_release;
@ -682,9 +680,7 @@ static void usage(void)
"-drop-ld-preload drop LD_PRELOAD for target process\n"
"-E var=value sets/modifies targets environment variable(s)\n"
"-U var unsets targets environment variable(s)\n"
#if defined(CONFIG_USE_GUEST_BASE)
"-B address set guest_base address to address\n"
#endif
"-bsd type select emulated BSD type FreeBSD/NetBSD/OpenBSD (default)\n"
"\n"
"Debug options:\n"
@ -830,11 +826,9 @@ int main(int argc, char **argv)
#endif
exit(1);
}
#if defined(CONFIG_USE_GUEST_BASE)
} else if (!strcmp(r, "B")) {
guest_base = strtol(argv[optind++], NULL, 0);
have_guest_base = 1;
#endif
} else if (!strcmp(r, "drop-ld-preload")) {
(void) envlist_unsetenv(envlist, "LD_PRELOAD");
} else if (!strcmp(r, "bsd")) {
@ -923,7 +917,6 @@ int main(int argc, char **argv)
target_environ = envlist_to_environ(envlist, NULL);
envlist_free(envlist);
#if defined(CONFIG_USE_GUEST_BASE)
/*
* Now that page sizes are configured in cpu_init() we can do
* proper page alignment for guest_base.
@ -950,7 +943,6 @@ int main(int argc, char **argv)
fclose(fp);
}
}
#endif /* CONFIG_USE_GUEST_BASE */
if (loader_exec(filename, argv+optind, target_environ, regs, info) != 0) {
printf("Error loading %s\n", filename);
@ -964,9 +956,7 @@ int main(int argc, char **argv)
free(target_environ);
if (qemu_log_enabled()) {
#if defined(CONFIG_USE_GUEST_BASE)
qemu_log("guest_base 0x%lx\n", guest_base);
#endif
log_page_dump();
qemu_log("start_brk 0x" TARGET_ABI_FMT_lx "\n", info->start_brk);
@ -986,12 +976,10 @@ int main(int argc, char **argv)
syscall_init();
signal_init();
#if defined(CONFIG_USE_GUEST_BASE)
/* Now that we've loaded the binary, GUEST_BASE is fixed. Delay
generating the prologue until now so that the prologue can take
the real value of GUEST_BASE into account. */
tcg_prologue_init(&tcg_ctx);
#endif
/* build Task State */
memset(ts, 0, sizeof(TaskState));

2
bsd-user/qemu.h
View File

@ -101,9 +101,7 @@ typedef struct TaskState {
void init_task_state(TaskState *ts);
extern const char *qemu_uname_release;
#if defined(CONFIG_USE_GUEST_BASE)
extern unsigned long mmap_min_addr;
#endif
/* ??? See if we can avoid exposing so much of the loader internals. */
/*

10
configure vendored
View File

@ -293,7 +293,6 @@ cocoa="no"
softmmu="yes"
linux_user="no"
bsd_user="no"
guest_base="yes"
aix="no"
blobs="yes"
pkgversion=""
@ -975,10 +974,6 @@ for opt do
;;
--enable-bsd-user) bsd_user="yes"
;;
--enable-guest-base) guest_base="yes"
;;
--disable-guest-base) guest_base="no"
;;
--enable-pie) pie="yes"
;;
--disable-pie) pie="no"
@ -1314,7 +1309,6 @@ disabled with --disable-FEATURE, default is enabled if available:
user supported user emulation targets
linux-user all linux usermode emulation targets
bsd-user all BSD usermode emulation targets
guest-base GUEST_BASE support for usermode emulation targets
docs build documentation
guest-agent build the QEMU Guest Agent
guest-agent-msi build guest agent Windows MSI installation package
@ -4544,7 +4538,6 @@ fi
echo "brlapi support $brlapi"
echo "bluez support $bluez"
echo "Documentation $docs"
echo "GUEST_BASE $guest_base"
echo "PIE $pie"
echo "vde support $vde"
echo "netmap support $netmap"
@ -5481,9 +5474,6 @@ fi
if test "$target_user_only" = "yes" -a "$bflt" = "yes"; then
echo "TARGET_HAS_BFLT=y" >> $config_target_mak
fi
if test "$target_user_only" = "yes" -a "$guest_base" = "yes"; then
echo "CONFIG_USE_GUEST_BASE=y" >> $config_target_mak
fi
if test "$target_bsd_user" = "yes" ; then
echo "CONFIG_BSD_USER=y" >> $config_target_mak
fi

5
include/exec/cpu-all.h
View File

@ -160,16 +160,11 @@ static inline void tswap64s(uint64_t *s)
/* On some host systems the guest address space is reserved on the host.
* This allows the guest address space to be offset to a convenient location.
*/
#if defined(CONFIG_USE_GUEST_BASE)
extern unsigned long guest_base;
extern int have_guest_base;
extern unsigned long reserved_va;
#define GUEST_BASE guest_base
#define RESERVED_VA reserved_va
#else
#define GUEST_BASE 0ul
#define RESERVED_VA 0ul
#endif
#define GUEST_ADDR_MAX (RESERVED_VA ? RESERVED_VA : \
(1ul << TARGET_VIRT_ADDR_SPACE_BITS) - 1)

2
linux-user/elfload.c
View File

@ -1756,7 +1756,6 @@ static void probe_guest_base(const char *image_name,
* it explicitly, and set guest_base appropriately.
* In case of error we will print a suitable message and exit.
*/
#if defined(CONFIG_USE_GUEST_BASE)
const char *errmsg;
if (!have_guest_base && !reserved_va) {
unsigned long host_start, real_start, host_size;
@ -1795,7 +1794,6 @@ static void probe_guest_base(const char *image_name,
exit_errmsg:
fprintf(stderr, "%s: %s\n", image_name, errmsg);
exit(-1);
#endif
}

12
linux-user/main.c
View File

@ -43,7 +43,6 @@ int gdbstub_port;
envlist_t *envlist;
static const char *cpu_model;
unsigned long mmap_min_addr;
#if defined(CONFIG_USE_GUEST_BASE)
unsigned long guest_base;
int have_guest_base;
#if (TARGET_LONG_BITS == 32) && (HOST_LONG_BITS == 64)
@ -63,7 +62,6 @@ unsigned long reserved_va = 0xf7000000;
#else
unsigned long reserved_va;
#endif
#endif
static void usage(void);
@ -3584,7 +3582,6 @@ static void handle_arg_cpu(const char *arg)
}
}
#if defined(CONFIG_USE_GUEST_BASE)
static void handle_arg_guest_base(const char *arg)
{
guest_base = strtol(arg, NULL, 0);
@ -3626,7 +3623,6 @@ static void handle_arg_reserved_va(const char *arg)
exit(1);
}
}
#endif
static void handle_arg_singlestep(const char *arg)
{
@ -3673,12 +3669,10 @@ static const struct qemu_argument arg_table[] = {
"argv0", "forces target process argv[0] to be 'argv0'"},
{"r", "QEMU_UNAME", true, handle_arg_uname,
"uname", "set qemu uname release string to 'uname'"},
#if defined(CONFIG_USE_GUEST_BASE)
{"B", "QEMU_GUEST_BASE", true, handle_arg_guest_base,
"address", "set guest_base address to 'address'"},
{"R", "QEMU_RESERVED_VA", true, handle_arg_reserved_va,
"size", "reserve 'size' bytes for guest virtual address space"},
#endif
{"d", "QEMU_LOG", true, handle_arg_log,
"item[,...]", "enable logging of specified items "
"(use '-d help' for a list of items)"},
@ -3954,7 +3948,6 @@ int main(int argc, char **argv, char **envp)
target_environ = envlist_to_environ(envlist, NULL);
envlist_free(envlist);
#if defined(CONFIG_USE_GUEST_BASE)
/*
* Now that page sizes are configured in cpu_init() we can do
* proper page alignment for guest_base.
@ -3976,7 +3969,6 @@ int main(int argc, char **argv, char **envp)
mmap_next_start = reserved_va;
}
}
#endif /* CONFIG_USE_GUEST_BASE */
/*
* Read in mmap_min_addr kernel parameter. This value is used
@ -4050,9 +4042,7 @@ int main(int argc, char **argv, char **envp)
free(target_environ);
if (qemu_log_enabled()) {
#if defined(CONFIG_USE_GUEST_BASE)
qemu_log("guest_base 0x%lx\n", guest_base);
#endif
log_page_dump();
qemu_log("start_brk 0x" TARGET_ABI_FMT_lx "\n", info->start_brk);
@ -4072,12 +4062,10 @@ int main(int argc, char **argv, char **envp)
syscall_init();
signal_init();
#if defined(CONFIG_USE_GUEST_BASE)
/* Now that we've loaded the binary, GUEST_BASE is fixed. Delay
generating the prologue until now so that the prologue can take
the real value of GUEST_BASE into account. */
tcg_prologue_init(&tcg_ctx);
#endif
#if defined(TARGET_I386)
env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK;

4
linux-user/mmap.c
View File

@ -206,7 +206,6 @@ abi_ulong mmap_next_start = TASK_UNMAPPED_BASE;
unsigned long last_brk;
#ifdef CONFIG_USE_GUEST_BASE
/* Subroutine of mmap_find_vma, used when we have pre-allocated a chunk
of guest address space. */
static abi_ulong mmap_find_vma_reserved(abi_ulong start, abi_ulong size)
@ -253,7 +252,6 @@ static abi_ulong mmap_find_vma_reserved(abi_ulong start, abi_ulong size)
return addr;
}
#endif
/*
* Find and reserve a free memory area of size 'size'. The search
@ -276,11 +274,9 @@ abi_ulong mmap_find_vma(abi_ulong start, abi_ulong size)
size = HOST_PAGE_ALIGN(size);
#ifdef CONFIG_USE_GUEST_BASE
if (RESERVED_VA) {
return mmap_find_vma_reserved(start, size);
}
#endif
addr = start;
wrapped = repeat = 0;

8
tcg/aarch64/tcg-target.c
View File

@ -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);

4
tcg/ia64/tcg-target.c
View File

@ -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

6
tcg/ppc/tcg-target.c
View File

@ -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);

2
tcg/s390/tcg-target.c
View File

@ -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

6
tcg/sparc/tcg-target.c
View File

@ -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);

2
translate-all.c
View File

@ -688,7 +688,7 @@ void tcg_exec_init(unsigned long tb_size)
tcg_ctx.code_gen_ptr = tcg_ctx.code_gen_buffer;
tcg_register_jit(tcg_ctx.code_gen_buffer, tcg_ctx.code_gen_buffer_size);
page_init();
#if !defined(CONFIG_USER_ONLY) || !defined(CONFIG_USE_GUEST_BASE)
#if defined(CONFIG_SOFTMMU)
/* There's no guest base to take into account, so go ahead and
initialize the prologue now. */
tcg_prologue_init(&tcg_ctx);