This shouldn't trigger as the configure check ensures we don't build any unsupported combinations. However we make the explicit check in cpu-defs to catch any new ones being introduced.
Signed-off-by: Alex Bennée <alex.ben...@linaro.org> --- include/exec/cpu-defs.h | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/include/exec/cpu-defs.h b/include/exec/cpu-defs.h index 5f4e303..499e1a8 100644 --- a/include/exec/cpu-defs.h +++ b/include/exec/cpu-defs.h @@ -54,6 +54,15 @@ typedef uint64_t target_ulong; #error TARGET_LONG_SIZE undefined #endif +/* Supporting 64 bit vCPUs on 32 bit hosts is getting increasingly + * complicated so we no longer do it. The configure script should have + * prevented such a configuration being built but we double check + * here. + */ +#if HOST_LONG_BITS < TARGET_LONG_BITS +#error wide-on-narrow CPU emulation is no longer supported +#endif + #if !defined(CONFIG_USER_ONLY) /* use a fully associative victim tlb of 8 entries */ #define CPU_VTLB_SIZE 8 -- 2.7.4
