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[PULL,07/10] linux-user/sh4: Reduce TARGET_VIRT_ADDR_SPACE_BITS to 31

Message ID cc1b3960a1a54125d2c87719fa945179bffbae68.1508329282.git.riku.voipio@linaro.org (mailing list archive)
State New, archived
Headers show

Commit Message

Riku Voipio Oct. 18, 2017, 12:33 p.m. UTC 
From: Richard Henderson <rth@twiddle.net>

The real kernel has TASK_SIZE as 0x7c000000, due to quirks with
a couple of SH parts.  But nominally user-space is limited to 2GB.

Signed-off-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20170708025030.15845-4-rth@twiddle.net>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
---
 target/sh4/cpu.h | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)
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Patch

diff --git a/target/sh4/cpu.h b/target/sh4/cpu.h
index 79f85d3365..123f34783a 100644
--- a/target/sh4/cpu.h
+++ b/target/sh4/cpu.h
@@ -45,7 +45,11 @@ 
 #define TARGET_PAGE_BITS 12	/* 4k XXXXX */
 
 #define TARGET_PHYS_ADDR_SPACE_BITS 32
-#define TARGET_VIRT_ADDR_SPACE_BITS 32
+#ifdef CONFIG_USER_ONLY
+# define TARGET_VIRT_ADDR_SPACE_BITS 31
+#else
+# define TARGET_VIRT_ADDR_SPACE_BITS 32
+#endif
 
 #define SR_MD 30
 #define SR_RB 29