This commit introduces TCG_VADDR_BITS in meson.build to explicitly define
the vaddr size. For non-wasm hosts, this is set to the value of
host_long_bits, preserving the original behaviour of the check in the target
loop. For the wasm host, it's explicitly set to 64 to enable support for
64bit guests.

Signed-off-by: Kohei Tokunaga <ktokunaga.mail@gmail.com>
---
 meson.build | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/meson.build b/meson.build
index ad2053f968..185ec96149 100644
--- a/meson.build
+++ b/meson.build
@@ -3229,6 +3229,9 @@ endif
 
 # Detect host pointer size for the target configuration loop.
 host_long_bits = cc.sizeof('void *') * 8
+tcg_vaddr_bits = host_arch == 'wasm32' ? 64 : host_long_bits
+
+config_host_data.set('TCG_VADDR_BITS', tcg_vaddr_bits)
 
 ########################
 # Target configuration #
@@ -3327,7 +3330,7 @@ foreach target : target_dirs
   target_kconfig = []
   foreach sym: accelerators
     # Disallow 64-bit on 32-bit emulation and virtualization
-    if host_long_bits < config_target['TARGET_LONG_BITS'].to_int()
+    if tcg_vaddr_bits < config_target['TARGET_LONG_BITS'].to_int()
       continue
     endif
     if sym == 'CONFIG_TCG' or target in accelerator_targets.get(sym, [])
-- 
2.43.0