On 1/2/24 05:58, Richard Henderson wrote:
Since alpha binaries are generally built for multiple
page sizes, it is trivial to allow the page size to vary.
Signed-off-by: Richard Henderson <richard.hender...@linaro.org>
---
target/alpha/cpu-param.h | 16 ++++++++++++++--
1 file changed, 14 insertions(+), 2 deletions(-)
diff --git a/target/alpha/cpu-param.h b/target/alpha/cpu-param.h
index 68c46f7998..c969cb016b 100644
--- a/target/alpha/cpu-param.h
+++ b/target/alpha/cpu-param.h
@@ -9,10 +9,22 @@
#define ALPHA_CPU_PARAM_H
#define TARGET_LONG_BITS 64
-#define TARGET_PAGE_BITS 13
/* ??? EV4 has 34 phys addr bits, EV5 has 40, EV6 has 44. */
#define TARGET_PHYS_ADDR_SPACE_BITS 44
-#define TARGET_VIRT_ADDR_SPACE_BITS (30 + TARGET_PAGE_BITS)
+
+#ifdef CONFIG_USER_ONLY
+/*
+ * Allow user-only to vary page size. Real hardware allows only 8k and 64k,
+ * but since any variance means guests cannot assume a fixed value, allow
+ * a 4k minimum to match x86 host, which can minimize emulation issues.
+ */
+# define TARGET_PAGE_BITS_VARY
+# define TARGET_PAGE_BITS_MIN 12
+# define TARGET_VIRT_ADDR_SPACE_BITS 63
+#else
+# define TARGET_PAGE_BITS 13
+# define TARGET_VIRT_ADDR_SPACE_BITS (30 + TARGET_PAGE_BITS)
+#endif
#endif
Reviewed-by: Pierrick Bouvier <pierrick.bouv...@linaro.org>
