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target/arm: Support EL0 v7m msr/mrs for CONFIG_USER_ONLY

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Simply moving the non-stub helper_v7m_mrs/msr outside of
!CONFIG_USER_ONLY is not an option, because of all of the
other system-mode helpers that are called.

But we can split out a few subroutines to handle the few
EL0 accessible registers without duplicating code.

Backports commit 04c9c81b8fa2ee33f59a26265700fae6fc646062 from qemu
This commit is contained in:
Richard Henderson 2019-11-21 16:19:54 -05:00 committed by Lioncash
parent df5929cb69
commit f2ec6bc22d
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1 changed files with 2 additions and 0 deletions
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2
qemu/target/arm/cpu.h
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@ -1236,6 +1236,7 @@ static inline void xpsr_write(CPUARMState *env, uint32_t val, uint32_t mask)
if (mask & XPSR_GE) {
env->GE = (val & XPSR_GE) >> 16;
}
#ifndef CONFIG_USER_ONLY
if (mask & XPSR_T) {
env->thumb = ((val & XPSR_T) != 0);
}
@ -1251,6 +1252,7 @@ static inline void xpsr_write(CPUARMState *env, uint32_t val, uint32_t mask)
/* Note that this only happens on exception exit */
write_v7m_exception(env, val & XPSR_EXCP);
}
#endif
}
#define HCR_VM (1ULL << 0)