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

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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
This commit is contained in:
Peter Maydell 2013-09-10 19:09:32 +01:00
parent 94c2b6aff4
commit f5f6d38b74
1 changed files with 4 additions and 0 deletions
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4
target-arm/cpu.c
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@ -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)