[Qemu-arm] [RFC PATCH v1 1/2] target-arm: Update page size for aarch64

[vijayak]

From: Vijay <address@hidden>

Set target page size to minimum 4K for aarch64.
This helps to reduce live migration downtime significantly.

Signed-off-by: Vijaya Kumar K <address@hidden>
---
 target-arm/cpu.h |    7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/target-arm/cpu.h b/target-arm/cpu.h
index 066ff67..2e4b48f 100644
--- a/target-arm/cpu.h
+++ b/target-arm/cpu.h
@@ -1562,11 +1562,18 @@ bool write_cpustate_to_list(ARMCPU *cpu);
 #if defined(CONFIG_USER_ONLY)
 #define TARGET_PAGE_BITS 12
 #else
+/*
+ * Aarch64 support minimum 4K page size
+ */
+#if defined(TARGET_AARCH64)
+#define TARGET_PAGE_BITS 12
+#else
 /* The ARM MMU allows 1k pages.  */
 /* ??? Linux doesn't actually use these, and they're deprecated in recent
    architecture revisions.  Maybe a configure option to disable them.  */
 #define TARGET_PAGE_BITS 10
 #endif
+#endif
 
 #if defined(TARGET_AARCH64)
 #  define TARGET_PHYS_ADDR_SPACE_BITS 48
-- 
1.7.9.5