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-rw-r--r--target/s390x/kvm.c9
1 files changed, 4 insertions, 5 deletions
diff --git a/target/s390x/kvm.c b/target/s390x/kvm.c
index 54864c259c..c24c869e77 100644
--- a/target/s390x/kvm.c
+++ b/target/s390x/kvm.c
@@ -126,12 +126,11 @@
/*
* KVM does only support memory slots up to KVM_MEM_MAX_NR_PAGES pages
* as the dirty bitmap must be managed by bitops that take an int as
- * position indicator. If we have a guest beyond that we will split off
- * new subregions. The split must happen on a segment boundary (1MB).
+ * position indicator. This would end at an unaligned address
+ * (0x7fffff00000). As future variants might provide larger pages
+ * and to make all addresses properly aligned, let us split at 4TB.
*/
-#define KVM_MEM_MAX_NR_PAGES ((1ULL << 31) - 1)
-#define SEG_MSK (~0xfffffULL)
-#define KVM_SLOT_MAX_BYTES ((KVM_MEM_MAX_NR_PAGES * TARGET_PAGE_SIZE) & SEG_MSK)
+#define KVM_SLOT_MAX_BYTES (4UL * TiB)
static CPUWatchpoint hw_watchpoint;
/*