linuxboot_dma: compile for i486

The ROM uses the cmovne instruction, which is new in Pentium Pro and does not
work when running QEMU with "-cpu 486".  Avoid producing that instruction.

Suggested-by: Richard W.M. Jones <rjones@redhat.com>
Suggested-by: Thomas Huth <thuth@redhat.com>
Reported-by: Rob Landley <rob@landley.net>
Cc: qemu-stable@nongnu.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit 7e018385103cd7a571b9ea0d6f994af6b1129fe7)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>

diff --git a/pc-bios/linuxboot_dma.bin b/pc-bios/linuxboot_dma.bin
index 218d3ab4a29bfb5ab7125ec7a4d29dad1860c673..d176f62797813e4b926dca9dfce7ce554dc1a4d6 100644 (file)
Binary files a/pc-bios/linuxboot_dma.bin and b/pc-bios/linuxboot_dma.bin differ

diff --git a/pc-bios/optionrom/Makefile b/pc-bios/optionrom/Makefile
index fa53d9e58e9041cd1495d03b3a5603deacd7513b..a9a9e5e7ebc193583f7e5cd58caaa46df3fb7606 100644 (file)
--- a/pc-bios/optionrom/Makefile
+++ b/pc-bios/optionrom/Makefile
@@ -13,6 +13,7 @@ $(call set-vpath, $(SRC_PATH)/pc-bios/optionrom)
 ifeq ($(lastword $(filter -O%, -O0 $(CFLAGS))),-O0)
 override CFLAGS += -O2
 endif
+override CFLAGS += -march=i486
 
 # Drop -fstack-protector and the like
 QEMU_CFLAGS := $(filter -W%, $(QEMU_CFLAGS)) $(CFLAGS_NOPIE) -ffreestanding