OvmfPkg/README: Update information about running OVMF

The new instructions document -pflash & -bios options
for running OVMF on QEMU.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15038 6f19259b-4bc3-4df7-8a09-765794883524

1 files changed, 15 insertions, 4 deletions

diff --git a/OvmfPkg/README b/OvmfPkg/README
index f2c2fc799..79e70bf0e 100644
--- a/OvmfPkg/README
+++ b/OvmfPkg/README
@@ -60,12 +60,23 @@ http://sourceforge.net/apps/mediawiki/tianocore/index.php?title=How_to_build_OVM
 

 === RUNNING OVMF on QEMU ===

 

-* QEMU 0.9.1 or later is required.

-* Either copy, rename or symlink OVMF.FD => bios.bin

+* QEMU 0.12.2 or later is required.

 * Be sure to use qemu-system-x86_64, if you are using and X64 firmware.

   (qemu-system-x86_64 works for the IA32 firmware as well, of course.)

-* Use the QEMU -L parameter to specify the directory where the bios.bin

-  file is located.

+* Use OVMF for QEMU firmware (3 options available)

+  - Option 1: QEMU 1.6 or newer; Use QEMU -pflash parameter

+    * QEMU/OVMF will use emulated flash, and fully support UEFI variables

+    * Run qemu with: -pflash path/to/OVMF.fd

+  - Option 2: Use QEMU -bios parameter

+    * Note that UEFI variables will be partially emulated, and non-volatile

+      variables may lose their contents after a reboot

+    * Run qemu with: -bios path/to/OVMF.fd

+  - Option 3: Use QEMU -L parameter

+    * Note that UEFI variables will be partially emulated, and non-volatile

+      variables may lose their contents after a reboot

+    * Either copy, rename or symlink OVMF.fd => bios.bin

+    * Use the QEMU -L parameter to specify the directory where the bios.bin

+      file is located.

 * The EFI shell is built into OVMF builds at this time, so it should

   run automatically if a UEFI boot application is not found on the

   removable media.