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Re: [Xen-devel] [PATCH 1 of 3] Enable UEFI BIOS(OVMF) support in Xen-uns

To: Bei Guan <gbtju85@xxxxxxxxx>
Subject: Re: [Xen-devel] [PATCH 1 of 3] Enable UEFI BIOS(OVMF) support in Xen-unstable HVM
From: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Date: Mon, 25 Jul 2011 10:03:30 -0400
Cc: edk2-devel@xxxxxxxxxxxxxxxxxxxxx, Xen Devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Jordan Justen <jljusten@xxxxxxxxx>, Tim Deegan <Tim.Deegan@xxxxxxxxxx>, Andrei Warkentin <andreiw@xxxxxxxxxxxx>
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On Sat, Jul 23, 2011 at 12:23:16AM +0800, Bei Guan wrote:
> Hi,
> 
> My name is Bei Guan and I am one of this year's GSOS students for Tianocore.
> My project is to enable Xen support in OVMF and the following is about my

What does OVMF stand for?
> patch for Xen-unstable. Could you give me some comments? Thank you very
> much.
> 
> This patch can enable Xen-unstable hvmloader to load OVMF BIOS as Xen HVM
> UEFI support. It supports OVMF BIOS in IA32 and X86 environment. The loaded
> OVMF BIOS can get Xen SMBIOS and ACPI tables contents inside itself.
> 
> In order to be clear, I divide the patch into three parts:
> ovmf_xen_support.patch   Enable Xen hvmloader to load OVMF
> ovmf_firmware.patch        OVMF binary files
> ovmf_xl_xend.patch         Add hvmloader/bios xenstore key in libxl and xend
> 
> 
> Usage:
> Add an option field in HVM config file.
> # OVMF support. When enabled, hvmloader can load OVMF bios of
> IA32("ovmf-ia32") and X64("ovmf-x64")
> hvmbios = "ovmf-ia32"
> #hvmbios = "ovmf-x64"
> 
> Note:
> You should enable the HVM guest ACPI: acpi=1
> You can use the OVMF to boot into a UEFI-aware OS, such as
> ubuntu-10.10-desktop-amd64.
> iso. Just set the "disk" option like this:
> disk = [ 'file:/root/<img_name>.img,ioemu:hda,w',
> 'file:/root/ubuntu-10.10-desktop-amd64.iso,hdc:cdrom,r' ]
> 
> 
> *ovmf_xen_support.patch:*
> ------
> 
> # HG changeset patch
> # User gbtju85@xxxxxxxxx
> #
> 
> diff -r e298ce67777e tools/firmware/hvmloader/Makefile
> --- a/tools/firmware/hvmloader/Makefile    Mon Jul 18 14:38:31 2011 +0100
> +++ b/tools/firmware/hvmloader/Makefile    Fri Jul 22 23:00:20 2011 +0800
> @@ -43,6 +43,19 @@
>  CFLAGS += -DENABLE_ROMBIOS
>  ROMBIOS_ROM := $(ROMBIOS_DIR)/BIOS-bochs-latest
>  endif
> +OVMF_DIR :=  ../ovmf
> +OVMF32_ROM := $(OVMF_DIR)/ovmf-ia32.bin
> +OVMF64_ROM := $(OVMF_DIR)/ovmf-x64.bin
> +OVMF32_CIRRUS_VGA_ROM := $(OVMF_DIR)/ovmf-ia32-cirrus-vga.bin
> +OVMF64_CIRRUS_VGA_ROM := $(OVMF_DIR)/ovmf-x64-cirrus-vga.bin
> +
> +ifneq ($(OVMF32_ROM),)
> +OBJS += ovmf.o
> +endif
> +
> +ifneq ($(OVMF64_ROM),)
> +OBJS += ovmf.o
> +endif
> 
>  ifneq ($(SEABIOS_DIR),)
>  OBJS += seabios.o
> @@ -69,7 +82,7 @@
>      $(OBJCOPY) hvmloader.tmp hvmloader
>      rm -f hvmloader.tmp
> 
> -roms.inc: $(ROMBIOS_ROM) $(SEABIOS_ROM) $(STDVGA_ROM) $(CIRRUSVGA_ROM)
> ../etherboot/eb-roms.h
> +roms.inc: $(ROMBIOS_ROM) $(SEABIOS_ROM) $(STDVGA_ROM) $(CIRRUSVGA_ROM)
> $(OVMF32_ROM) $(OVMF64_ROM) $(OVMF32_CIRRUS_VGA_ROM)
> $(OVMF64_CIRRUS_VGA_ROM) ../etherboot/eb-roms.h
>      echo "/* Autogenerated file. DO NOT EDIT */" > $@.new
> 
>  ifneq ($(ROMBIOS_ROM),)
> @@ -84,6 +97,30 @@
>      echo "#endif" >> $@.new
>  endif
> 
> +ifneq ($(OVMF32_ROM),)
> +    echo "#ifdef ROM_INCLUDE_OVMF32" >> $@.new
> +    sh ./mkhex ovmf32 $(OVMF32_ROM) >> $@.new
> +    echo "#endif" >> $@.new
> +endif
> +
> +ifneq ($(OVMF64_ROM),)
> +    echo "#ifdef ROM_INCLUDE_OVMF64" >> $@.new
> +    sh ./mkhex ovmf64 $(OVMF64_ROM) >> $@.new
> +    echo "#endif" >> $@.new
> +endif
> +
> +ifneq ($(OVMF32_CIRRUS_VGA_ROM),)
> +    echo "#ifdef ROM_INCLUDE_OVMF32_CIRRUS_VGA" >> $@.new
> +    sh ./mkhex ovmf32_cirrus_vga $(OVMF32_CIRRUS_VGA_ROM) >> $@.new
> +    echo "#endif" >> $@.new
> +endif
> +
> +ifneq ($(OVMF64_CIRRUS_VGA_ROM),)
> +    echo "#ifdef ROM_INCLUDE_OVMF64_CIRRUS_VGA" >> $@.new
> +    sh ./mkhex ovmf64_cirrus_vga $(OVMF64_CIRRUS_VGA_ROM) >> $@.new
> +    echo "#endif" >> $@.new
> +endif
> +
>  ifneq ($(STDVGA_ROM),)
>      echo "#ifdef ROM_INCLUDE_VGABIOS" >> $@.new
>      sh ./mkhex vgabios_stdvga $(STDVGA_ROM) >> $@.new
> diff -r e298ce67777e tools/firmware/hvmloader/config.h
> --- a/tools/firmware/hvmloader/config.h    Mon Jul 18 14:38:31 2011 +0100
> +++ b/tools/firmware/hvmloader/config.h    Fri Jul 22 23:00:20 2011 +0800
> @@ -3,7 +3,7 @@
> 
>  #include <stdint.h>
> 
> -enum virtual_vga { VGA_none, VGA_std, VGA_cirrus, VGA_pt };
> +enum virtual_vga { VGA_none, VGA_std, VGA_cirrus, VGA_pt, VGA_custom };
>  extern enum virtual_vga virtual_vga;
> 
>  struct bios_config {
> @@ -16,6 +16,9 @@
>      /* Physical address to load at */
>      unsigned int bios_address;
> 
> +    /* Custom load function. */
> +    void (*load)(const struct bios_config *config);
> +    void (*pci_setup)(void);
>      /* ROMS */
>      int load_roms;
>      unsigned int optionrom_start, optionrom_end;
> @@ -36,6 +39,8 @@
> 
>  extern struct bios_config rombios_config;
>  extern struct bios_config seabios_config;
> +extern struct bios_config ovmf32_config;
> +extern struct bios_config ovmf64_config;
> 
>  #define PAGE_SHIFT 12
>  #define PAGE_SIZE  (1ul << PAGE_SHIFT)
> diff -r e298ce67777e tools/firmware/hvmloader/hvmloader.c
> --- a/tools/firmware/hvmloader/hvmloader.c    Mon Jul 18 14:38:31 2011 +0100
> +++ b/tools/firmware/hvmloader/hvmloader.c    Fri Jul 22 23:00:20 2011 +0800
> @@ -360,6 +360,8 @@
>  #ifdef ENABLE_SEABIOS
>      { "seabios", &seabios_config, },
>  #endif
> +    { "ovmf-ia32", &ovmf32_config, },
> +    { "ovmf-x64", &ovmf64_config, },
>      { NULL, NULL }
>  };
> 
> @@ -416,9 +418,13 @@
>          bios->create_smbios_tables();
>      }
> 
> -    printf("Loading %s ...\n", bios->name);
> -    memcpy((void *)bios->bios_address, bios->image,
> -           bios->image_size);
> +    if (bios->load) {

You don't want the printf on this line?
> +        bios->load(bios);
> +    } else {
> +        printf("Loading %s ...\n", bios->name);
> +        memcpy((void *)bios->bios_address, bios->image,
> +               bios->image_size);
> +    }
> 
>      if (bios->bios_relocate)
>          bios->bios_relocate();
> @@ -451,8 +457,10 @@
>              vgabios_sz = round_option_rom(
>                  (*(uint8_t *)(VGABIOS_PHYSICAL_ADDRESS+2)) * 512);
>              break;
> +        case VGA_custom:
> +            break;
>          default:
> -            printf("No emulated VGA adaptor ...\n");
> +            printf("No emulated VGA adaptor ROM...\n");
>              break;
>          }
> 
> diff -r e298ce67777e tools/firmware/hvmloader/ovmf.c
> --- /dev/null    Thu Jan 01 00:00:00 1970 +0000
> +++ b/tools/firmware/hvmloader/ovmf.c    Fri Jul 22 23:00:20 2011 +0800
> @@ -0,0 +1,189 @@
> +/*
> + * HVM OVMF UEFI support.
> + *
> + * Bei Guan, gbtju85@xxxxxxxxx
> + * Andrei Warkentin, andreiw@xxxxxxxxxxxx
> + * Leendert van Doorn, leendert@xxxxxxxxxxxxxx
> + * Copyright (c) 2005, International Business Machines Corporation.
> + * Copyright (c) 2006, Keir Fraser, XenSource Inc.
> + * Copyright (c) 2011, Citrix Inc.
> + *
> + * This program is free software; you can redistribute it and/or modify it
> + * under the terms and conditions of the GNU General Public License,
> + * version 2, as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope it will be useful, but WITHOUT
> + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
> + * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
> for
> + * more details.
> + *
> + * You should have received a copy of the GNU General Public License along
> with
> + * this program; if not, write to the Free Software Foundation, Inc., 59
> Temple
> + * Place - Suite 330, Boston, MA 02111-1307 USA.

Get rid of the address. That is not neccessary in anymore.

> + */
> +
> +#include "config.h"
> +#include "smbios_types.h"
> +#include "acpi/acpi2_0.h"
> +#include "apic_regs.h"
> +#include "../rombios/config.h"
> +#include "util.h"
> +#include "pci_regs.h"
> +#include "hypercall.h"
> +
> +#include <xen/hvm/params.h>
> +#include <xen/hvm/ioreq.h>
> +#include <xen/memory.h>
> +
> +#define ROM_INCLUDE_OVMF32
> +#define ROM_INCLUDE_OVMF64
> +#define ROM_INCLUDE_OVMF32_CIRRUS_VGA
> +#define ROM_INCLUDE_OVMF64_CIRRUS_VGA
> +#include "roms.inc"
> +
> +#define OVMF_BEGIN              0xFFF00000ULL
> +#define OVMF_SIZE               0x00100000ULL
> +#define OVMF_MAXOFFSET          0x000FFFFFULL
> +#define OVMF_END                (OVMF_BEGIN + OVMF_SIZE)
> +#define LOWCHUNK_BEGIN          0x000F0000
> +#define LOWCHUNK_SIZE           0x00010000
> +#define LOWCHUNK_MAXOFFSET      0x0000FFFF
> +#define LOWCHUNK_END            (OVMF_BEGIN + OVMF_SIZE)
> +
> +/*
> + * Set up an empty TSS area for virtual 8086 mode to use.
> + * The only important thing is that it musn't have any bits set
> + * in the interrupt redirection bitmap, so all zeros will do.
> + */
> +static void ovmf_init_vm86_tss(void)
> +{
> +    void *tss;
> +    struct xen_hvm_param p;
> +
> +    tss = mem_alloc(128, 128);
> +    memset(tss, 0, 128);
> +    p.domid = DOMID_SELF;
> +    p.index = HVM_PARAM_VM86_TSS;
> +    p.value = virt_to_phys(tss);
> +    hypercall_hvm_op(HVMOP_set_param, &p);
> +    printf("vm86 TSS at %08lx\n", virt_to_phys(tss));
> +}
> +
> +static void ovmf_load(const struct bios_config *config)
> +{
> +    xen_pfn_t mfn;
> +    uint64_t addr = OVMF_BEGIN;
> +
> +    virtual_vga = VGA_custom;
> +
> +    /* Copy video ROM. */
> +    if (config == &ovmf32_config) {
> +        memcpy((void *)VGABIOS_PHYSICAL_ADDRESS,
> +               ovmf32_cirrus_vga, sizeof(ovmf32_cirrus_vga));
> +        printf("OVMF32 Cirrus [0x%x-0x%x]\n", VGABIOS_PHYSICAL_ADDRESS,
> +               VGABIOS_PHYSICAL_ADDRESS + sizeof(ovmf32_cirrus_vga));
> +    } else if (config == &ovmf64_config) {
> +        memcpy((void *)VGABIOS_PHYSICAL_ADDRESS,
> +               ovmf64_cirrus_vga, sizeof(ovmf64_cirrus_vga));
> +        printf("OVMF64 Cirrus [0x%x-0x%x]\n", VGABIOS_PHYSICAL_ADDRESS,
> +               VGABIOS_PHYSICAL_ADDRESS + sizeof(ovmf64_cirrus_vga));
> +    }
> +
> +    /* Copy low-reset vector portion. */
> +    memcpy((void *) LOWCHUNK_BEGIN, (uint8_t *) config->image
> +           + OVMF_SIZE
> +           - LOWCHUNK_SIZE,
> +           LOWCHUNK_SIZE);
> +
> +    /* Ensure we have backing page prior to moving FD. */
> +    while ((addr >> PAGE_SHIFT) != (OVMF_END >> PAGE_SHIFT)) {
> +        mfn = (uint32_t) (addr >> PAGE_SHIFT);
> +        addr += PAGE_SIZE;
> +
> +        BUG_ON(mem_back_ram(mfn));
> +    }
> +
> +    printf("Initialized FD backing pages...\n");
> +
> +    /* Copy FD. */

What is FD?

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