[PULL 2/4] microvm: drop max-ram-below-4g support

[Gerd Hoffmann <kraxel@xxxxxxxxxx>]

Not useful for microvm and allows users to shoot themself
into the foot (make ram + mmio overlap).

Signed-off-by: Gerd Hoffmann <kraxel@xxxxxxxxxx>
Reviewed-by: Igor Mammedov <imammedo@xxxxxxxxxx>
Acked-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Reviewed-by: Philippe Mathieu-Daudé <philmd@xxxxxxxxxx>
Reviewed-by: Michael S. Tsirkin <mst@xxxxxxxxxx>
Message-id: 20200529073957.8018-3-kraxel@xxxxxxxxxx
---
 hw/i386/microvm.c | 19 -------------------
 1 file changed, 19 deletions(-)

diff --git a/hw/i386/microvm.c b/hw/i386/microvm.c
index 44f940813b07..5e931975a06d 100644
--- a/hw/i386/microvm.c
+++ b/hw/i386/microvm.c
@@ -173,25 +173,6 @@ static void microvm_memory_init(MicrovmMachineState *mms)
     ram_addr_t lowmem = 0xc0000000; /* 3G */
     int i;
 
-    /*
-     * Handle the machine opt max-ram-below-4g.  It is basically doing
-     * min(qemu limit, user limit).
-     */
-    if (!x86ms->max_ram_below_4g) {
-        x86ms->max_ram_below_4g = 4 * GiB;
-    }
-    if (lowmem > x86ms->max_ram_below_4g) {
-        lowmem = x86ms->max_ram_below_4g;
-        if (machine->ram_size - lowmem > lowmem &&
-            lowmem & (1 * GiB - 1)) {
-            warn_report("There is possibly poor performance as the ram size "
-                        " (0x%" PRIx64 ") is more then twice the size of"
-                        " max-ram-below-4g (%"PRIu64") and"
-                        " max-ram-below-4g is not a multiple of 1G.",
-                        (uint64_t)machine->ram_size, x86ms->max_ram_below_4g);
-        }
-    }
-
     if (machine->ram_size > lowmem) {
         x86ms->above_4g_mem_size = machine->ram_size - lowmem;
         x86ms->below_4g_mem_size = lowmem;
-- 
2.18.4