target-arm: Make '-cpu any' available in linux-user mode only

Make the 'any' CPU for target-arm available only in linux-user mode.
The ARM target provides a CPU named "any", which turns on support for
all user-level instruction set extensions we know about. This is
intended for linux-user emulation mode, where it is the default CPU type.
It makes no sense to try to use this for system emulation, since we don't
initialize it with any system-level information like feature register
values or implementation specific cp15 registers. (Unsurprisingly, some
boards won't boot at all, though you might get lucky in some cases where
the guest doesn't happen to prod things that aren't there.)

Prevent users from making this command line error by removing the
CPU definition from the softmmu build.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Andreas Färber <afaerber@suse.de>
Message-id: 1378213995-12945-1-git-send-email-peter.maydell@linaro.org

diff --git a/target-arm/cpu.c b/target-arm/cpu.c
index b2556c66b45c28dde84378f9c1c60eb66340780c..827e28ee4ded2862d34289617c6de3d0fa5c0280 100644 (file)
--- a/target-arm/cpu.c
+++ b/target-arm/cpu.c
@@ -822,6 +822,7 @@ static void pxa270c5_initfn(Object *obj)
     cpu->reset_sctlr = 0x00000078;
 }
 
+#ifdef CONFIG_USER_ONLY
 static void arm_any_initfn(Object *obj)
 {
     ARMCPU *cpu = ARM_CPU(obj);
@@ -834,6 +835,7 @@ static void arm_any_initfn(Object *obj)
     set_feature(&cpu->env, ARM_FEATURE_V7MP);
     cpu->midr = 0xffffffff;
 }
+#endif
 
 typedef struct ARMCPUInfo {
     const char *name;
@@ -874,7 +876,9 @@ static const ARMCPUInfo arm_cpus[] = {
     { .name = "pxa270-b1",   .initfn = pxa270b1_initfn },
     { .name = "pxa270-c0",   .initfn = pxa270c0_initfn },
     { .name = "pxa270-c5",   .initfn = pxa270c5_initfn },
+#ifdef CONFIG_USER_ONLY
     { .name = "any",         .initfn = arm_any_initfn },
+#endif
 };
 
 static void arm_cpu_class_init(ObjectClass *oc, void *data)