[PATCH v5 0/7] CloudHv: Rely on PVH boot specification

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* [PATCH v5 0/7] CloudHv: Rely on PVH boot specification
@ 2022-03-01 13:29 Boeuf, Sebastien
  2022-03-01 13:29 ` [PATCH v5 1/7] OvmfPkg: Make the Xen ELF header generator more flexible Boeuf, Sebastien
                   ` (6 more replies)
  0 siblings, 7 replies; 11+ messages in thread
From: Boeuf, Sebastien @ 2022-03-01 13:29 UTC (permalink / raw)
  To: devel; +Cc: jiewen.yao, jordan.l.justen, kraxel, sebastien.boeuf

From: Sebastien Boeuf <sebastien.boeuf@intel.com>

Cloud Hypervisor aims at emulating the minimal amount of legacy devices
and this is why the PVH boot specification is supported. The point is to
be able to share some information with the guest without the need for
emulating devices that would be present on real hardware.

Since Cloud Hypervisor supports loading a PVH ELF binary, the CloudHv
target is updated to be generated as such. Relying on the PVH boot
specification, we don't need to hardcode the location of the ACPI tables
anymore since we can retrieve the RSDP address from the hvm_start_info
structure. Same thing for the RAM below 4G, we can find this information
through the PVH memmap entries rather than relying on the emulated CMOS.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>

Sebastien Boeuf (7):
  OvmfPkg: Make the Xen ELF header generator more flexible
  OvmfPkg: Xen: Use a new fdf include for the PVH ELF header
  OvmfPkg: Xen: Generate fdf include file from ELF header generator
  OvmfPkg: Generate CloudHv as a PVH ELF binary
  OvmfPkg: CloudHv: Retrieve RSDP address from PVH
  OvmfPkg: CloudHv: Rely on PVH memmap instead of CMOS
  OvmfPkg: CloudHv: Add README

 OvmfPkg/AcpiPlatformDxe/AcpiPlatformDxe.inf |   2 +
 OvmfPkg/AcpiPlatformDxe/CloudHvAcpi.c       |  39 ++++--
 OvmfPkg/CloudHv/CloudHvElfHeader.fdf.inc    |  54 ++++++++
 OvmfPkg/CloudHv/CloudHvX64.dsc              |   2 +-
 OvmfPkg/CloudHv/CloudHvX64.fdf              |  40 ++----
 OvmfPkg/CloudHv/README                      |  67 ++++++++++
 OvmfPkg/Include/IndustryStandard/CloudHv.h  |   5 -
 OvmfPkg/OvmfXen.fdf                         |  57 +-------
 OvmfPkg/OvmfXenElfHeaderGenerator.c         | 141 +++++++++++++++-----
 OvmfPkg/PlatformPei/MemDetect.c             |  73 ++++++++++
 OvmfPkg/PlatformPei/PlatformPei.inf         |   2 +
 OvmfPkg/VarStore.fdf.inc                    |   1 +
 OvmfPkg/XenElfHeader.fdf.inc                |  42 ++++++
 13 files changed, 391 insertions(+), 134 deletions(-)
 create mode 100644 OvmfPkg/CloudHv/CloudHvElfHeader.fdf.inc
 create mode 100644 OvmfPkg/CloudHv/README
 create mode 100644 OvmfPkg/XenElfHeader.fdf.inc

-- 
2.32.0

---------------------------------------------------------------------
Intel Corporation SAS (French simplified joint stock company)
Registered headquarters: "Les Montalets"- 2, rue de Paris, 
92196 Meudon Cedex, France
Registration Number:  302 456 199 R.C.S. NANTERRE
Capital: 4,572,000 Euros

This e-mail and any attachments may contain confidential material for
the sole use of the intended recipient(s). Any review or distribution
by others is strictly prohibited. If you are not the intended
recipient, please contact the sender and delete all copies.


^ permalink raw reply	[flat|nested] 11+ messages in thread

* [PATCH v5 1/7] OvmfPkg: Make the Xen ELF header generator more flexible
  2022-03-01 13:29 [PATCH v5 0/7] CloudHv: Rely on PVH boot specification Boeuf, Sebastien
@ 2022-03-01 13:29 ` Boeuf, Sebastien
  2022-03-01 13:29 ` [PATCH v5 2/7] OvmfPkg: Xen: Use a new fdf include for the PVH ELF header Boeuf, Sebastien
                   ` (5 subsequent siblings)
  6 siblings, 0 replies; 11+ messages in thread
From: Boeuf, Sebastien @ 2022-03-01 13:29 UTC (permalink / raw)
  To: devel; +Cc: jiewen.yao, jordan.l.justen, kraxel, sebastien.boeuf

From: Sebastien Boeuf <sebastien.boeuf@intel.com>

Adding some flexibility to the program through optional parameters and
global define, so that other targets can use the generator.

* A global define is added so that we can choose at build time if we
  want to use 32-bit or 64-bit base structures.
* A first optional parameter is added so the user can provide the
  expected blob size of the generated binary.
* A second optional parameter is added so the user can specify an output
  file to which the generated output will be printed.

The default behavior isn't modified.

Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
---
 OvmfPkg/OvmfXenElfHeaderGenerator.c | 141 +++++++++++++++++++++-------
 1 file changed, 109 insertions(+), 32 deletions(-)

diff --git a/OvmfPkg/OvmfXenElfHeaderGenerator.c b/OvmfPkg/OvmfXenElfHeaderGenerator.c
index 489060cdad..672129b85d 100644
--- a/OvmfPkg/OvmfXenElfHeaderGenerator.c
+++ b/OvmfPkg/OvmfXenElfHeaderGenerator.c
@@ -10,19 +10,31 @@
 **/
 
 #include "elf.h"
-#include "stdio.h"
+#include "fcntl.h"
+#include "stdbool.h"
 #include "stddef.h"
+#include "stdio.h"
+#include "stdlib.h"
 
 void
 print_hdr (
+  FILE    *file,
   void    *s,
-  size_t  size
+  size_t  size,
+  bool    end_delimiter
   )
 {
   char  *c = s;
 
-  while (size--) {
-    printf ("0x%02hhx, ", *(c++));
+  fprintf (file, "  ");
+  while (size-- > 1) {
+    fprintf (file, "0x%02hhx, ", *(c++));
+  }
+
+  if (end_delimiter) {
+    fprintf (file, "0x%02hhx,", *c);
+  } else {
+    fprintf (file, "0x%02hhx", *c);
   }
 }
 
@@ -36,34 +48,79 @@ typedef struct {
   uint32_t    desc;
 } xen_elfnote_phys32_entry;
 
+#define LICENSE_HDR  "\
+## @file\r\n\
+#  FDF include file that defines a PVH ELF header.\r\n\
+#\r\n\
+#  Copyright (c) 2022, Intel Corporation. All rights reserved.\r\n\
+#\r\n\
+#  SPDX-License-Identifier: BSD-2-Clause-Patent\r\n\
+#\r\n\
+##\r\n\
+\r\n\
+"
+
 int
 main (
-  void
+  int   argc,
+  char  *argv[]
   )
 {
   /* FW_SIZE */
   size_t  ovmf_blob_size = 0x00200000;
   /* Load OVMF at 1MB when running as PVH guest */
   uint32_t  ovmf_base_address = 0x00100000;
+  uint32_t  ovmfxen_pvh_entry_point;
+  size_t    offset_into_file = 0;
+  char      *endptr, *str;
+  long      param;
+  FILE      *file = stdout;
+
+  /* Parse the size parameter */
+  if (argc > 1) {
+    str   = argv[1];
+    param = strtol (str, &endptr, 10);
+    if (endptr != str) {
+      ovmf_blob_size = (size_t)param;
+    }
+  }
+
+  /* Parse the filepath parameter */
+  if (argc > 2) {
+    file = fopen (argv[2], "w");
+    fprintf (file, LICENSE_HDR);
+  }
+
   /* Xen PVH entry point */
-  uint32_t  ovmfxen_pvh_entry_point = ovmf_base_address + ovmf_blob_size - 0x30;
-  size_t    offset_into_file        = 0;
+  ovmfxen_pvh_entry_point = ovmf_base_address + ovmf_blob_size - 0x30;
 
   /* ELF file header */
+ #ifdef PVH64
+  Elf64_Ehdr  hdr = {
+ #else
   Elf32_Ehdr  hdr = {
-    .e_ident     = ELFMAG,
-    .e_type      = ET_EXEC,
-    .e_machine   = EM_386,
-    .e_version   = EV_CURRENT,
-    .e_entry     = ovmfxen_pvh_entry_point,
-    .e_flags     = R_386_NONE,
-    .e_ehsize    = sizeof (hdr),
+ #endif
+    .e_ident   = ELFMAG,
+    .e_type    = ET_EXEC,
+    .e_machine = EM_386,
+    .e_version = EV_CURRENT,
+    .e_entry   = ovmfxen_pvh_entry_point,
+    .e_flags   = R_386_NONE,
+    .e_ehsize  = sizeof (hdr),
+ #ifdef PVH64
+    .e_phentsize = sizeof (Elf64_Phdr),
+ #else
     .e_phentsize = sizeof (Elf32_Phdr),
+ #endif
   };
 
   offset_into_file += sizeof (hdr);
 
-  hdr.e_ident[EI_CLASS]   = ELFCLASS32;
+ #ifdef PVH64
+  hdr.e_ident[EI_CLASS] = ELFCLASS64;
+ #else
+  hdr.e_ident[EI_CLASS] = ELFCLASS32;
+ #endif
   hdr.e_ident[EI_DATA]    = ELFDATA2LSB;
   hdr.e_ident[EI_VERSION] = EV_CURRENT;
   hdr.e_ident[EI_OSABI]   = ELFOSABI_LINUX;
@@ -71,14 +128,22 @@ main (
   hdr.e_phoff = sizeof (hdr);
 
   /* program header */
+ #ifdef PVH64
+  Elf64_Phdr  phdr_load = {
+ #else
   Elf32_Phdr  phdr_load = {
+ #endif
     .p_type   = PT_LOAD,
     .p_offset = 0, /* load everything */
     .p_paddr  = ovmf_base_address,
     .p_filesz = ovmf_blob_size,
     .p_memsz  = ovmf_blob_size,
     .p_flags  = PF_X | PF_W | PF_R,
+ #ifdef PVH64
+    .p_align  = 4,
+ #else
     .p_align  = 0,
+ #endif
   };
 
   phdr_load.p_vaddr = phdr_load.p_paddr;
@@ -98,12 +163,20 @@ main (
       sizeof (xen_elfnote_phys32_entry) -
       offsetof (xen_elfnote_phys32_entry, desc),
   };
-  Elf32_Phdr                phdr_note = {
+ #ifdef PVH64
+  Elf64_Phdr  phdr_note = {
+ #else
+  Elf32_Phdr  phdr_note = {
+ #endif
     .p_type   = PT_NOTE,
     .p_filesz = sizeof (xen_elf_note),
     .p_memsz  = sizeof (xen_elf_note),
     .p_flags  = PF_R,
+ #ifdef PVH64
+    .p_align  = 4,
+ #else
     .p_align  = 0,
+ #endif
   };
 
   hdr.e_phnum       += 1;
@@ -120,31 +193,35 @@ main (
   size_t  hdr_size  = sizeof (hdr);
   size_t  entry_off = offsetof (typeof(hdr), e_entry);
 
-  printf ("# ELF file header\n");
-  print_hdr (&hdr, entry_off);
-  printf ("\n");
-  print_hdr (&hdr.e_entry, sizeof (hdr.e_entry));
-  printf (" # hdr.e_entry\n");
-  print_hdr (&hdr.e_entry + 1, hdr_size - entry_off - sizeof (hdr.e_entry));
+  fprintf (file, "DATA = {\r\n");
 
-  printf ("\n\n# ELF Program segment headers\n");
-  printf ("# - Load segment\n");
+  fprintf (file, "  # ELF file header\r\n");
+  print_hdr (file, &hdr, entry_off, true);
+  fprintf (file, "\r\n");
+  print_hdr (file, &hdr.e_entry, sizeof (hdr.e_entry), true);
+  fprintf (file, " # hdr.e_entry\r\n");
+  print_hdr (file, &hdr.e_entry + 1, hdr_size - entry_off - sizeof (hdr.e_entry), true);
+
+  fprintf (file, "\r\n\r\n  # ELF Program segment headers\r\n");
+  fprintf (file, "  # - Load segment\r\n");
   for (i = 0; i < sizeof (phdr_load); i += 4) {
-    print_hdr (((char *)&phdr_load) + i, 4);
-    printf ("\n");
+    print_hdr (file, ((char *)&phdr_load) + i, 4, true);
+    fprintf (file, "\r\n");
   }
 
-  printf ("# - ELFNOTE segment\n");
+  fprintf (file, "  # - ELFNOTE segment\r\n");
   for (i = 0; i < sizeof (phdr_note); i += 4) {
-    print_hdr (((char *)&phdr_note) + i, 4);
-    printf ("\n");
+    print_hdr (file, ((char *)&phdr_note) + i, 4, true);
+    fprintf (file, "\r\n");
   }
 
-  printf ("\n# XEN_ELFNOTE_PHYS32_ENTRY\n");
+  fprintf (file, "\r\n  # XEN_ELFNOTE_PHYS32_ENTRY\r\n");
   for (i = 0; i < sizeof (xen_elf_note); i += 4) {
-    print_hdr (((char *)&xen_elf_note) + i, 4);
-    printf ("\n");
+    print_hdr (file, ((char *)&xen_elf_note) + i, 4, (sizeof (xen_elf_note) - i) > 4);
+    fprintf (file, "\r\n");
   }
 
+  fprintf (file, "}\r\n");
+
   return 0;
 }
-- 
2.32.0

---------------------------------------------------------------------
Intel Corporation SAS (French simplified joint stock company)
Registered headquarters: "Les Montalets"- 2, rue de Paris, 
92196 Meudon Cedex, France
Registration Number:  302 456 199 R.C.S. NANTERRE
Capital: 4,572,000 Euros

This e-mail and any attachments may contain confidential material for
the sole use of the intended recipient(s). Any review or distribution
by others is strictly prohibited. If you are not the intended
recipient, please contact the sender and delete all copies.


^ permalink raw reply related	[flat|nested] 11+ messages in thread

* [PATCH v5 2/7] OvmfPkg: Xen: Use a new fdf include for the PVH ELF header
  2022-03-01 13:29 [PATCH v5 0/7] CloudHv: Rely on PVH boot specification Boeuf, Sebastien
  2022-03-01 13:29 ` [PATCH v5 1/7] OvmfPkg: Make the Xen ELF header generator more flexible Boeuf, Sebastien
@ 2022-03-01 13:29 ` Boeuf, Sebastien
  2022-03-01 13:29 ` [PATCH v5 3/7] OvmfPkg: Xen: Generate fdf include file from ELF header generator Boeuf, Sebastien
                   ` (4 subsequent siblings)
  6 siblings, 0 replies; 11+ messages in thread
From: Boeuf, Sebastien @ 2022-03-01 13:29 UTC (permalink / raw)
  To: devel; +Cc: jiewen.yao, jordan.l.justen, kraxel, sebastien.boeuf

From: Sebastien Boeuf <sebastien.boeuf@intel.com>

Instead of having the PVH ELF header part of the fdf file directly, we
move it to a dedicated include file. This is the first step in
automating the generation of the header.

Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
---
 OvmfPkg/OvmfXen.fdf          | 57 ++------------------------------
 OvmfPkg/XenElfHeader.fdf.inc | 64 ++++++++++++++++++++++++++++++++++++
 2 files changed, 66 insertions(+), 55 deletions(-)
 create mode 100644 OvmfPkg/XenElfHeader.fdf.inc

diff --git a/OvmfPkg/OvmfXen.fdf b/OvmfPkg/OvmfXen.fdf
index a6acf3b835..2e67db5d32 100644
--- a/OvmfPkg/OvmfXen.fdf
+++ b/OvmfPkg/OvmfXen.fdf
@@ -31,61 +31,8 @@ NumBlocks     = $(FW_BLOCKS)
 !if $(FD_SIZE_IN_KB) == 4096
 0x00000000|0x00040000
 !endif
-DATA = {
-  #
-  # This hex array have been generated by OvmfPkg/OvmfXenElfHeaderGenerator.c
-  # and copied manually.
-  #
-  # ELF file header
-  0x7f, 0x45, 0x4c, 0x46, # e_ident[0..3]: Magic number
-  0x01, # File class: 32-bit objects
-  0x01, # Data encoding: 2's complement, little endian
-  0x01, # File version
-  0x03, # OS ABI identification: Object uses GNU ELF extensions
-  0x00, # ABI version
-  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  # e_ident[EI_PAD...]
-  0x02, 0x00, # e_type = Executable file
-  0x03, 0x00, # e_machine = Intel 80386
-  0x01, 0x00, 0x00, 0x00, # e_version
-  0xd0, 0xff, 0x2f, 0x00, # e_entry: Entry point virtual address
-  0x34, 0x00, 0x00, 0x00, # e_phoff: Program header table file offset
-  0x00, 0x00, 0x00, 0x00, # e_shoff: Section header table file offset
-  0x00, 0x00, 0x00, 0x00, # e_flags: Processor-specific flags
-  0x34, 0x00, #    e_ehsize: ELF header size
-  0x20, 0x00, # e_phentsize: Program header table entry size
-  0x02, 0x00, #     e_phnum: Program header table entry count
-  0x00, 0x00, # e_shentsize: Section header table entry size
-  0x00, 0x00, #     e_shnum: Section header table entry count
-  0x00, 0x00, # e_shstrndx
-
-  # ELF Program segment headers
-  # - Load segment
-  0x01, 0x00, 0x00, 0x00, # p_type = Loadable program segment
-  0x00, 0x00, 0x00, 0x00, # p_offset
-  0x00, 0x00, 0x10, 0x00, # p_vaddr: Segment virtual address
-  0x00, 0x00, 0x10, 0x00, # p_paddr: Segment physical address
-  0x00, 0x00, 0x20, 0x00, # p_filesz: Segment size in file
-  0x00, 0x00, 0x20, 0x00, # p_memsz: Segment size in memory
-  0x07, 0x00, 0x00, 0x00, # p_flags = Segment is executable | writable | readable
-  0x00, 0x00, 0x00, 0x00, # p_align
-  # - ELFNOTE segment
-  0x04, 0x00, 0x00, 0x00, # p_type = PT_NOTE
-  0x74, 0x00, 0x00, 0x00, # p_offset = point to XEN_ELFNOTE_PHYS32_ENTRY below
-  0x74, 0x00, 0x10, 0x00,
-  0x74, 0x00, 0x10, 0x00,
-  0x14, 0x00, 0x00, 0x00,
-  0x14, 0x00, 0x00, 0x00,
-  0x04, 0x00, 0x00, 0x00, # p_flags = Segment is readable
-  0x00, 0x00, 0x00, 0x00,
-
-  # XEN_ELFNOTE_PHYS32_ENTRY
-  0x04, 0x00, 0x00, 0x00, # name size
-  0x04, 0x00, 0x00, 0x00, # desc size
-  0x12, 0x00, 0x00, 0x00, # type = XEN_ELFNOTE_PHYS32_ENTRY
-  0x58, 0x65, 0x6e, 0x00, # name = "Xen"
-  0xd0, 0xff, 0x2f, 0x00, # desc: PVH entry point
-  0x00
-}
+
+!include XenElfHeader.fdf.inc
 
 !if ($(FD_SIZE_IN_KB) == 1024) || ($(FD_SIZE_IN_KB) == 2048)
 0x0000e000|0x00001000
diff --git a/OvmfPkg/XenElfHeader.fdf.inc b/OvmfPkg/XenElfHeader.fdf.inc
new file mode 100644
index 0000000000..dbc1305d25
--- /dev/null
+++ b/OvmfPkg/XenElfHeader.fdf.inc
@@ -0,0 +1,64 @@
+## @file
+#  FDF include file that defines a PVH ELF header.
+#
+#  Copyright (c) 2022, Intel Corporation. All rights reserved.
+#
+#  SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+DATA = {
+  #
+  # This hex array have been generated by OvmfPkg/OvmfXenElfHeaderGenerator.c
+  # and copied manually.
+  #
+  # ELF file header
+  0x7f, 0x45, 0x4c, 0x46, # e_ident[0..3]: Magic number
+  0x01, # File class: 32-bit objects
+  0x01, # Data encoding: 2's complement, little endian
+  0x01, # File version
+  0x03, # OS ABI identification: Object uses GNU ELF extensions
+  0x00, # ABI version
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  # e_ident[EI_PAD...]
+  0x02, 0x00, # e_type = Executable file
+  0x03, 0x00, # e_machine = Intel 80386
+  0x01, 0x00, 0x00, 0x00, # e_version
+  0xd0, 0xff, 0x2f, 0x00, # e_entry: Entry point virtual address
+  0x34, 0x00, 0x00, 0x00, # e_phoff: Program header table file offset
+  0x00, 0x00, 0x00, 0x00, # e_shoff: Section header table file offset
+  0x00, 0x00, 0x00, 0x00, # e_flags: Processor-specific flags
+  0x34, 0x00, #    e_ehsize: ELF header size
+  0x20, 0x00, # e_phentsize: Program header table entry size
+  0x02, 0x00, #     e_phnum: Program header table entry count
+  0x00, 0x00, # e_shentsize: Section header table entry size
+  0x00, 0x00, #     e_shnum: Section header table entry count
+  0x00, 0x00, # e_shstrndx
+
+  # ELF Program segment headers
+  # - Load segment
+  0x01, 0x00, 0x00, 0x00, # p_type = Loadable program segment
+  0x00, 0x00, 0x00, 0x00, # p_offset
+  0x00, 0x00, 0x10, 0x00, # p_vaddr: Segment virtual address
+  0x00, 0x00, 0x10, 0x00, # p_paddr: Segment physical address
+  0x00, 0x00, 0x20, 0x00, # p_filesz: Segment size in file
+  0x00, 0x00, 0x20, 0x00, # p_memsz: Segment size in memory
+  0x07, 0x00, 0x00, 0x00, # p_flags = Segment is executable | writable | readable
+  0x00, 0x00, 0x00, 0x00, # p_align
+  # - ELFNOTE segment
+  0x04, 0x00, 0x00, 0x00, # p_type = PT_NOTE
+  0x74, 0x00, 0x00, 0x00, # p_offset = point to XEN_ELFNOTE_PHYS32_ENTRY below
+  0x74, 0x00, 0x10, 0x00,
+  0x74, 0x00, 0x10, 0x00,
+  0x14, 0x00, 0x00, 0x00,
+  0x14, 0x00, 0x00, 0x00,
+  0x04, 0x00, 0x00, 0x00, # p_flags = Segment is readable
+  0x00, 0x00, 0x00, 0x00,
+
+  # XEN_ELFNOTE_PHYS32_ENTRY
+  0x04, 0x00, 0x00, 0x00, # name size
+  0x04, 0x00, 0x00, 0x00, # desc size
+  0x12, 0x00, 0x00, 0x00, # type = XEN_ELFNOTE_PHYS32_ENTRY
+  0x58, 0x65, 0x6e, 0x00, # name = "Xen"
+  0xd0, 0xff, 0x2f, 0x00, # desc: PVH entry point
+  0x00
+}
-- 
2.32.0

---------------------------------------------------------------------
Intel Corporation SAS (French simplified joint stock company)
Registered headquarters: "Les Montalets"- 2, rue de Paris, 
92196 Meudon Cedex, France
Registration Number:  302 456 199 R.C.S. NANTERRE
Capital: 4,572,000 Euros

This e-mail and any attachments may contain confidential material for
the sole use of the intended recipient(s). Any review or distribution
by others is strictly prohibited. If you are not the intended
recipient, please contact the sender and delete all copies.


^ permalink raw reply related	[flat|nested] 11+ messages in thread

* [PATCH v5 3/7] OvmfPkg: Xen: Generate fdf include file from ELF header generator
  2022-03-01 13:29 [PATCH v5 0/7] CloudHv: Rely on PVH boot specification Boeuf, Sebastien
  2022-03-01 13:29 ` [PATCH v5 1/7] OvmfPkg: Make the Xen ELF header generator more flexible Boeuf, Sebastien
  2022-03-01 13:29 ` [PATCH v5 2/7] OvmfPkg: Xen: Use a new fdf include for the PVH ELF header Boeuf, Sebastien
@ 2022-03-01 13:29 ` Boeuf, Sebastien
  2022-03-01 13:29 ` [PATCH v5 4/7] OvmfPkg: Generate CloudHv as a PVH ELF binary Boeuf, Sebastien
                   ` (3 subsequent siblings)
  6 siblings, 0 replies; 11+ messages in thread
From: Boeuf, Sebastien @ 2022-03-01 13:29 UTC (permalink / raw)
  To: devel; +Cc: jiewen.yao, jordan.l.justen, kraxel, sebastien.boeuf

From: Sebastien Boeuf <sebastien.boeuf@intel.com>

Updating the fdf include file based on the run of the ELF header
generator. The diff from this patch is the result of:

$ gcc -o elf_gen OvmfPkg/OvmfXenElfHeaderGenerator.c
$ ./elf_gen 2097152 OvmfPkg/XenElfHeader.fdf.inc

Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
---
 OvmfPkg/XenElfHeader.fdf.inc | 60 ++++++++++++------------------------
 1 file changed, 19 insertions(+), 41 deletions(-)

diff --git a/OvmfPkg/XenElfHeader.fdf.inc b/OvmfPkg/XenElfHeader.fdf.inc
index dbc1305d25..c4f04ad28b 100644
--- a/OvmfPkg/XenElfHeader.fdf.inc
+++ b/OvmfPkg/XenElfHeader.fdf.inc
@@ -8,57 +8,35 @@
 ##
 
 DATA = {
-  #
-  # This hex array have been generated by OvmfPkg/OvmfXenElfHeaderGenerator.c
-  # and copied manually.
-  #
   # ELF file header
-  0x7f, 0x45, 0x4c, 0x46, # e_ident[0..3]: Magic number
-  0x01, # File class: 32-bit objects
-  0x01, # Data encoding: 2's complement, little endian
-  0x01, # File version
-  0x03, # OS ABI identification: Object uses GNU ELF extensions
-  0x00, # ABI version
-  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  # e_ident[EI_PAD...]
-  0x02, 0x00, # e_type = Executable file
-  0x03, 0x00, # e_machine = Intel 80386
-  0x01, 0x00, 0x00, 0x00, # e_version
-  0xd0, 0xff, 0x2f, 0x00, # e_entry: Entry point virtual address
-  0x34, 0x00, 0x00, 0x00, # e_phoff: Program header table file offset
-  0x00, 0x00, 0x00, 0x00, # e_shoff: Section header table file offset
-  0x00, 0x00, 0x00, 0x00, # e_flags: Processor-specific flags
-  0x34, 0x00, #    e_ehsize: ELF header size
-  0x20, 0x00, # e_phentsize: Program header table entry size
-  0x02, 0x00, #     e_phnum: Program header table entry count
-  0x00, 0x00, # e_shentsize: Section header table entry size
-  0x00, 0x00, #     e_shnum: Section header table entry count
-  0x00, 0x00, # e_shstrndx
+  0x7f, 0x45, 0x4c, 0x46, 0x01, 0x01, 0x01, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x03, 0x00, 0x01, 0x00, 0x00, 0x00,
+  0xd0, 0xff, 0x2f, 0x00, # hdr.e_entry
+  0x34, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x34, 0x00, 0x20, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 
   # ELF Program segment headers
   # - Load segment
-  0x01, 0x00, 0x00, 0x00, # p_type = Loadable program segment
-  0x00, 0x00, 0x00, 0x00, # p_offset
-  0x00, 0x00, 0x10, 0x00, # p_vaddr: Segment virtual address
-  0x00, 0x00, 0x10, 0x00, # p_paddr: Segment physical address
-  0x00, 0x00, 0x20, 0x00, # p_filesz: Segment size in file
-  0x00, 0x00, 0x20, 0x00, # p_memsz: Segment size in memory
-  0x07, 0x00, 0x00, 0x00, # p_flags = Segment is executable | writable | readable
-  0x00, 0x00, 0x00, 0x00, # p_align
+  0x01, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x10, 0x00,
+  0x00, 0x00, 0x10, 0x00,
+  0x00, 0x00, 0x20, 0x00,
+  0x00, 0x00, 0x20, 0x00,
+  0x07, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00,
   # - ELFNOTE segment
-  0x04, 0x00, 0x00, 0x00, # p_type = PT_NOTE
-  0x74, 0x00, 0x00, 0x00, # p_offset = point to XEN_ELFNOTE_PHYS32_ENTRY below
+  0x04, 0x00, 0x00, 0x00,
+  0x74, 0x00, 0x00, 0x00,
   0x74, 0x00, 0x10, 0x00,
   0x74, 0x00, 0x10, 0x00,
   0x14, 0x00, 0x00, 0x00,
   0x14, 0x00, 0x00, 0x00,
-  0x04, 0x00, 0x00, 0x00, # p_flags = Segment is readable
+  0x04, 0x00, 0x00, 0x00,
   0x00, 0x00, 0x00, 0x00,
 
   # XEN_ELFNOTE_PHYS32_ENTRY
-  0x04, 0x00, 0x00, 0x00, # name size
-  0x04, 0x00, 0x00, 0x00, # desc size
-  0x12, 0x00, 0x00, 0x00, # type = XEN_ELFNOTE_PHYS32_ENTRY
-  0x58, 0x65, 0x6e, 0x00, # name = "Xen"
-  0xd0, 0xff, 0x2f, 0x00, # desc: PVH entry point
-  0x00
+  0x04, 0x00, 0x00, 0x00,
+  0x04, 0x00, 0x00, 0x00,
+  0x12, 0x00, 0x00, 0x00,
+  0x58, 0x65, 0x6e, 0x00,
+  0xd0, 0xff, 0x2f, 0x00
 }
-- 
2.32.0

---------------------------------------------------------------------
Intel Corporation SAS (French simplified joint stock company)
Registered headquarters: "Les Montalets"- 2, rue de Paris, 
92196 Meudon Cedex, France
Registration Number:  302 456 199 R.C.S. NANTERRE
Capital: 4,572,000 Euros

This e-mail and any attachments may contain confidential material for
the sole use of the intended recipient(s). Any review or distribution
by others is strictly prohibited. If you are not the intended
recipient, please contact the sender and delete all copies.


^ permalink raw reply related	[flat|nested] 11+ messages in thread

* [PATCH v5 4/7] OvmfPkg: Generate CloudHv as a PVH ELF binary
  2022-03-01 13:29 [PATCH v5 0/7] CloudHv: Rely on PVH boot specification Boeuf, Sebastien
                   ` (2 preceding siblings ...)
  2022-03-01 13:29 ` [PATCH v5 3/7] OvmfPkg: Xen: Generate fdf include file from ELF header generator Boeuf, Sebastien
@ 2022-03-01 13:29 ` Boeuf, Sebastien
  2022-03-02  7:17   ` [edk2-devel] " Gerd Hoffmann
  2022-03-01 13:29 ` [PATCH v5 5/7] OvmfPkg: CloudHv: Retrieve RSDP address from PVH Boeuf, Sebastien
                   ` (2 subsequent siblings)
  6 siblings, 1 reply; 11+ messages in thread
From: Boeuf, Sebastien @ 2022-03-01 13:29 UTC (permalink / raw)
  To: devel; +Cc: jiewen.yao, jordan.l.justen, kraxel, sebastien.boeuf

From: Sebastien Boeuf <sebastien.boeuf@intel.com>

Following the model from the Xen target, CloudHv is generated as a PVH
ELF binary to take advantage of the PVH specification, which requires
less emulation from the VMM.

The fdf include file CloudHvElfHeader.fdf.inc has been generated from
the following commands:

$ gcc -D PVH64 -o elf_gen OvmfPkg/OvmfXenElfHeaderGenerator.c
$ ./elf_gen 4194304 OvmfPkg/CloudHv/CloudHvElfHeader.fdf.inc

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
---
 OvmfPkg/CloudHv/CloudHvElfHeader.fdf.inc | 54 ++++++++++++++++++++++++
 OvmfPkg/CloudHv/CloudHvX64.dsc           |  2 +-
 OvmfPkg/CloudHv/CloudHvX64.fdf           | 37 ++++------------
 OvmfPkg/VarStore.fdf.inc                 |  1 +
 4 files changed, 64 insertions(+), 30 deletions(-)
 create mode 100644 OvmfPkg/CloudHv/CloudHvElfHeader.fdf.inc

diff --git a/OvmfPkg/CloudHv/CloudHvElfHeader.fdf.inc b/OvmfPkg/CloudHv/CloudHvElfHeader.fdf.inc
new file mode 100644
index 0000000000..8377e30bdc
--- /dev/null
+++ b/OvmfPkg/CloudHv/CloudHvElfHeader.fdf.inc
@@ -0,0 +1,54 @@
+## @file
+#  FDF include file that defines a PVH ELF header.
+#
+#  Copyright (c) 2022, Intel Corporation. All rights reserved.
+#
+#  SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+DATA = {
+  # ELF file header
+  0x7f, 0x45, 0x4c, 0x46, 0x02, 0x01, 0x01, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x03, 0x00, 0x01, 0x00, 0x00, 0x00,
+  0xd0, 0xff, 0x4f, 0x00, 0x00, 0x00, 0x00, 0x00, # hdr.e_entry
+  0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x00, 0x38, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+
+  # ELF Program segment headers
+  # - Load segment
+  0x01, 0x00, 0x00, 0x00,
+  0x07, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x10, 0x00,
+  0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x10, 0x00,
+  0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x40, 0x00,
+  0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x40, 0x00,
+  0x00, 0x00, 0x00, 0x00,
+  0x04, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00,
+  # - ELFNOTE segment
+  0x04, 0x00, 0x00, 0x00,
+  0x04, 0x00, 0x00, 0x00,
+  0xb0, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00,
+  0xb0, 0x00, 0x10, 0x00,
+  0x00, 0x00, 0x00, 0x00,
+  0xb0, 0x00, 0x10, 0x00,
+  0x00, 0x00, 0x00, 0x00,
+  0x14, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00,
+  0x14, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00,
+  0x04, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00,
+
+  # XEN_ELFNOTE_PHYS32_ENTRY
+  0x04, 0x00, 0x00, 0x00,
+  0x04, 0x00, 0x00, 0x00,
+  0x12, 0x00, 0x00, 0x00,
+  0x58, 0x65, 0x6e, 0x00,
+  0xd0, 0xff, 0x4f, 0x00
+}
diff --git a/OvmfPkg/CloudHv/CloudHvX64.dsc b/OvmfPkg/CloudHv/CloudHvX64.dsc
index 3172100310..b4d855d80f 100644
--- a/OvmfPkg/CloudHv/CloudHvX64.dsc
+++ b/OvmfPkg/CloudHv/CloudHvX64.dsc
@@ -631,7 +631,7 @@
 #
 ################################################################################
 [Components]
-  OvmfPkg/ResetVector/ResetVector.inf
+  OvmfPkg/XenResetVector/XenResetVector.inf
 
   #
   # SEC Phase modules
diff --git a/OvmfPkg/CloudHv/CloudHvX64.fdf b/OvmfPkg/CloudHv/CloudHvX64.fdf
index ce3302c6d6..282bcf8634 100644
--- a/OvmfPkg/CloudHv/CloudHvX64.fdf
+++ b/OvmfPkg/CloudHv/CloudHvX64.fdf
@@ -14,8 +14,8 @@
 !include OvmfPkg/OvmfPkgDefines.fdf.inc
 
 #
-# Build the variable store and the firmware code as one unified flash device
-# image.
+# This will allow the flash device image to be recognize as an ELF, with first
+# an ELF headers, then the firmware code.
 #
 [FD.CLOUDHV]
 BaseAddress   = $(FW_BASE_ADDRESS)
@@ -24,38 +24,17 @@ ErasePolarity = 1
 BlockSize     = $(BLOCK_SIZE)
 NumBlocks     = $(FW_BLOCKS)
 
-!include OvmfPkg/VarStore.fdf.inc
-
-$(VARS_SIZE)|$(FVMAIN_SIZE)
-FV = FVMAIN_COMPACT
-
-$(SECFV_OFFSET)|$(SECFV_SIZE)
-FV = SECFV
-
 #
-# Build the variable store and the firmware code as separate flash device
-# images.
+# Leaving 4kiB for the PVH ELF header. This is more than enough.
 #
-[FD.CLOUDHV_VARS]
-BaseAddress   = $(FW_BASE_ADDRESS)
-Size          = $(VARS_SIZE)
-ErasePolarity = 1
-BlockSize     = $(BLOCK_SIZE)
-NumBlocks     = $(VARS_BLOCKS)
-
-!include OvmfPkg/VarStore.fdf.inc
+0x00000000|0x00001000
 
-[FD.CLOUDHV_CODE]
-BaseAddress   = $(CODE_BASE_ADDRESS)
-Size          = $(CODE_SIZE)
-ErasePolarity = 1
-BlockSize     = $(BLOCK_SIZE)
-NumBlocks     = $(CODE_BLOCKS)
+!include CloudHvElfHeader.fdf.inc
 
-0x00000000|$(FVMAIN_SIZE)
+0x00001000|$(FVMAIN_SIZE)
 FV = FVMAIN_COMPACT
 
-$(FVMAIN_SIZE)|$(SECFV_SIZE)
+$(SECFV_OFFSET)|$(SECFV_SIZE)
 FV = SECFV
 
 ################################################################################
@@ -142,7 +121,7 @@ READ_LOCK_STATUS   = TRUE
 #
 INF  OvmfPkg/Sec/SecMain.inf
 
-INF  RuleOverride=RESET_VECTOR OvmfPkg/ResetVector/ResetVector.inf
+INF  RuleOverride=RESET_VECTOR OvmfPkg/XenResetVector/XenResetVector.inf
 
 ################################################################################
 [FV.PEIFV]
diff --git a/OvmfPkg/VarStore.fdf.inc b/OvmfPkg/VarStore.fdf.inc
index a1e524e393..a1cbc74fbb 100644
--- a/OvmfPkg/VarStore.fdf.inc
+++ b/OvmfPkg/VarStore.fdf.inc
@@ -15,6 +15,7 @@
 0x00000000|0x00040000
 !endif
 #NV_VARIABLE_STORE
+
 DATA = {
   ## This is the EFI_FIRMWARE_VOLUME_HEADER
   # ZeroVector []
-- 
2.32.0

---------------------------------------------------------------------
Intel Corporation SAS (French simplified joint stock company)
Registered headquarters: "Les Montalets"- 2, rue de Paris, 
92196 Meudon Cedex, France
Registration Number:  302 456 199 R.C.S. NANTERRE
Capital: 4,572,000 Euros

This e-mail and any attachments may contain confidential material for
the sole use of the intended recipient(s). Any review or distribution
by others is strictly prohibited. If you are not the intended
recipient, please contact the sender and delete all copies.


^ permalink raw reply related	[flat|nested] 11+ messages in thread

* Re: [edk2-devel] [PATCH v5 4/7] OvmfPkg: Generate CloudHv as a PVH ELF binary
  2022-03-01 13:29 ` [PATCH v5 4/7] OvmfPkg: Generate CloudHv as a PVH ELF binary Boeuf, Sebastien
@ 2022-03-02  7:17   ` Gerd Hoffmann
  2022-03-02 11:29     ` Boeuf, Sebastien
  0 siblings, 1 reply; 11+ messages in thread
From: Gerd Hoffmann @ 2022-03-02  7:17 UTC (permalink / raw)
  To: devel, sebastien.boeuf; +Cc: jiewen.yao, jordan.l.justen

> -[FD.CLOUDHV_VARS]
> -[FD.CLOUDHV_CODE]

Dropping these two should be a separate patch,
so this patch becomes more readable.

> -0x00000000|$(FVMAIN_SIZE)
> +0x00001000|$(FVMAIN_SIZE)

FVMAIN_SIZE is not changes anywhere it seems.
So CLOUDHV.fd ends up with some odd size (instead of 2M or 4M) I guess?

(not much of a problem though if cloudhv doesn't care ...)

> diff --git a/OvmfPkg/VarStore.fdf.inc b/OvmfPkg/VarStore.fdf.inc
> index a1e524e393..a1cbc74fbb 100644
> --- a/OvmfPkg/VarStore.fdf.inc
> +++ b/OvmfPkg/VarStore.fdf.inc
> @@ -15,6 +15,7 @@
>  0x00000000|0x00040000
>  !endif
>  #NV_VARIABLE_STORE
> +
>  DATA = {
>    ## This is the EFI_FIRMWARE_VOLUME_HEADER
>    # ZeroVector []

leftover whitespace update

take care,
  Gerd


^ permalink raw reply	[flat|nested] 11+ messages in thread

* Re: [edk2-devel] [PATCH v5 4/7] OvmfPkg: Generate CloudHv as a PVH ELF binary
  2022-03-02  7:17   ` [edk2-devel] " Gerd Hoffmann
@ 2022-03-02 11:29     ` Boeuf, Sebastien
  0 siblings, 0 replies; 11+ messages in thread
From: Boeuf, Sebastien @ 2022-03-02 11:29 UTC (permalink / raw)
  To: kraxel@redhat.com, devel@edk2.groups.io; +Cc: Yao, Jiewen, Justen, Jordan L

On Wed, 2022-03-02 at 08:17 +0100, Gerd Hoffmann wrote:
> > -[FD.CLOUDHV_VARS]
> > -[FD.CLOUDHV_CODE]
> 
> Dropping these two should be a separate patch,
> so this patch becomes more readable.

Sounds good.

> 
> > -0x00000000|$(FVMAIN_SIZE)
> > +0x00001000|$(FVMAIN_SIZE)
> 
> FVMAIN_SIZE is not changes anywhere it seems.
> So CLOUDHV.fd ends up with some odd size (instead of 2M or 4M) I
> guess?

No the total size is still 4M because of the FW_SIZE.

> 
> (not much of a problem though if cloudhv doesn't care ...)
> 
> > diff --git a/OvmfPkg/VarStore.fdf.inc b/OvmfPkg/VarStore.fdf.inc
> > index a1e524e393..a1cbc74fbb 100644
> > --- a/OvmfPkg/VarStore.fdf.inc
> > +++ b/OvmfPkg/VarStore.fdf.inc
> > @@ -15,6 +15,7 @@
> >  0x00000000|0x00040000
> >  !endif
> >  #NV_VARIABLE_STORE
> > +
> >  DATA = {
> >    ## This is the EFI_FIRMWARE_VOLUME_HEADER
> >    # ZeroVector []
> 
> leftover whitespace update

Ok I'll remove it.

> 
> take care,
>   Gerd
> 

---------------------------------------------------------------------
Intel Corporation SAS (French simplified joint stock company)
Registered headquarters: "Les Montalets"- 2, rue de Paris, 
92196 Meudon Cedex, France
Registration Number:  302 456 199 R.C.S. NANTERRE
Capital: 4,572,000 Euros

This e-mail and any attachments may contain confidential material for
the sole use of the intended recipient(s). Any review or distribution
by others is strictly prohibited. If you are not the intended
recipient, please contact the sender and delete all copies.

^ permalink raw reply	[flat|nested] 11+ messages in thread

* [PATCH v5 5/7] OvmfPkg: CloudHv: Retrieve RSDP address from PVH
  2022-03-01 13:29 [PATCH v5 0/7] CloudHv: Rely on PVH boot specification Boeuf, Sebastien
                   ` (3 preceding siblings ...)
  2022-03-01 13:29 ` [PATCH v5 4/7] OvmfPkg: Generate CloudHv as a PVH ELF binary Boeuf, Sebastien
@ 2022-03-01 13:29 ` Boeuf, Sebastien
  2022-03-01 13:29 ` [PATCH v5 6/7] OvmfPkg: CloudHv: Rely on PVH memmap instead of CMOS Boeuf, Sebastien
  2022-03-01 13:29 ` [PATCH v5 7/7] OvmfPkg: CloudHv: Add README Boeuf, Sebastien
  6 siblings, 0 replies; 11+ messages in thread
From: Boeuf, Sebastien @ 2022-03-01 13:29 UTC (permalink / raw)
  To: devel; +Cc: jiewen.yao, jordan.l.justen, kraxel, sebastien.boeuf

From: Sebastien Boeuf <sebastien.boeuf@intel.com>

Instead of hardcoding the address of the RSDP in the firmware, let's
rely on the PVH structure hvm_start_info to retrieve this information.

Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
---
 OvmfPkg/AcpiPlatformDxe/AcpiPlatformDxe.inf |  2 ++
 OvmfPkg/AcpiPlatformDxe/CloudHvAcpi.c       | 39 ++++++++++++++-------
 OvmfPkg/CloudHv/CloudHvX64.fdf              |  3 ++
 OvmfPkg/Include/IndustryStandard/CloudHv.h  |  5 ---
 4 files changed, 32 insertions(+), 17 deletions(-)

diff --git a/OvmfPkg/AcpiPlatformDxe/AcpiPlatformDxe.inf b/OvmfPkg/AcpiPlatformDxe/AcpiPlatformDxe.inf
index b36b8413e0..f22bd7cb6d 100644
--- a/OvmfPkg/AcpiPlatformDxe/AcpiPlatformDxe.inf
+++ b/OvmfPkg/AcpiPlatformDxe/AcpiPlatformDxe.inf
@@ -56,6 +56,8 @@
 [Pcd]
   gEfiMdeModulePkgTokenSpaceGuid.PcdPciDisableBusEnumeration
   gUefiOvmfPkgTokenSpaceGuid.PcdOvmfHostBridgePciDevId
+  gUefiOvmfPkgTokenSpaceGuid.PcdXenPvhStartOfDayStructPtr
+  gUefiOvmfPkgTokenSpaceGuid.PcdXenPvhStartOfDayStructPtrSize
 
 [Depex]
   gEfiAcpiTableProtocolGuid
diff --git a/OvmfPkg/AcpiPlatformDxe/CloudHvAcpi.c b/OvmfPkg/AcpiPlatformDxe/CloudHvAcpi.c
index 44a6bb70fe..ff59600d3e 100644
--- a/OvmfPkg/AcpiPlatformDxe/CloudHvAcpi.c
+++ b/OvmfPkg/AcpiPlatformDxe/CloudHvAcpi.c
@@ -7,9 +7,11 @@
 
 **/
 
-#include <IndustryStandard/CloudHv.h> // CLOUDHV_RSDP_ADDRESS
-#include <Library/BaseLib.h>          // CpuDeadLoop()
-#include <Library/DebugLib.h>         // DEBUG()
+#include <IndustryStandard/CloudHv.h>                     // CLOUDHV_RSDP_ADDRESS
+#include <IndustryStandard/Xen/arch-x86/hvm/start_info.h> // hvm_start_info
+#include <Library/BaseLib.h>                              // CpuDeadLoop()
+#include <Library/DebugLib.h>                             // DEBUG()
+#include <Library/PcdLib.h>                               // PcdGet32()
 
 #include "AcpiPlatform.h"
 
@@ -23,20 +25,33 @@ InstallCloudHvTables (
   EFI_STATUS  Status;
   UINTN       TableHandle;
 
-  EFI_ACPI_DESCRIPTION_HEADER                *Xsdt;
-  VOID                                       *CurrentTableEntry;
-  UINTN                                      CurrentTablePointer;
-  EFI_ACPI_DESCRIPTION_HEADER                *CurrentTable;
-  UINTN                                      Index;
-  UINTN                                      NumberOfTableEntries;
-  EFI_ACPI_2_0_FIXED_ACPI_DESCRIPTION_TABLE  *Fadt2Table;
-  EFI_ACPI_DESCRIPTION_HEADER                *DsdtTable;
+  EFI_ACPI_DESCRIPTION_HEADER                   *Xsdt;
+  VOID                                          *CurrentTableEntry;
+  UINTN                                         CurrentTablePointer;
+  EFI_ACPI_DESCRIPTION_HEADER                   *CurrentTable;
+  UINTN                                         Index;
+  UINTN                                         NumberOfTableEntries;
+  EFI_ACPI_2_0_FIXED_ACPI_DESCRIPTION_TABLE     *Fadt2Table;
+  EFI_ACPI_DESCRIPTION_HEADER                   *DsdtTable;
+  EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER  *AcpiRsdpStructurePtr;
+  UINT32                                        *PVHResetVectorData;
+  struct hvm_start_info                         *pvh_start_info;
 
   Fadt2Table           = NULL;
   DsdtTable            = NULL;
   TableHandle          = 0;
   NumberOfTableEntries = 0;
-  EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER  *AcpiRsdpStructurePtr = (VOID *)CLOUDHV_RSDP_ADDRESS;
+  AcpiRsdpStructurePtr = NULL;
+  PVHResetVectorData   = NULL;
+  pvh_start_info       = NULL;
+
+  PVHResetVectorData = (VOID *)(UINTN)PcdGet32 (PcdXenPvhStartOfDayStructPtr);
+  if (PVHResetVectorData == 0) {
+    return EFI_NOT_FOUND;
+  }
+
+  pvh_start_info       = (struct hvm_start_info *)(UINTN)PVHResetVectorData[0];
+  AcpiRsdpStructurePtr = (EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER *)(UINTN)pvh_start_info->rsdp_paddr;
 
   // If XSDT table is found, just install its tables.
   // Otherwise, try to find and install the RSDT tables.
diff --git a/OvmfPkg/CloudHv/CloudHvX64.fdf b/OvmfPkg/CloudHv/CloudHvX64.fdf
index 282bcf8634..d80e13ae90 100644
--- a/OvmfPkg/CloudHv/CloudHvX64.fdf
+++ b/OvmfPkg/CloudHv/CloudHvX64.fdf
@@ -73,6 +73,9 @@ gUefiOvmfPkgTokenSpaceGuid.PcdOvmfSnpSecretsBase|gUefiOvmfPkgTokenSpaceGuid.PcdO
 0x00E000|0x001000
 gUefiOvmfPkgTokenSpaceGuid.PcdOvmfCpuidBase|gUefiOvmfPkgTokenSpaceGuid.PcdOvmfCpuidSize
 
+0x00F000|0x001000
+gUefiOvmfPkgTokenSpaceGuid.PcdXenPvhStartOfDayStructPtr|gUefiOvmfPkgTokenSpaceGuid.PcdXenPvhStartOfDayStructPtrSize
+
 0x010000|0x010000
 gUefiOvmfPkgTokenSpaceGuid.PcdOvmfSecPeiTempRamBase|gUefiOvmfPkgTokenSpaceGuid.PcdOvmfSecPeiTempRamSize
 
diff --git a/OvmfPkg/Include/IndustryStandard/CloudHv.h b/OvmfPkg/Include/IndustryStandard/CloudHv.h
index 86404cc97e..d31ecc9eec 100644
--- a/OvmfPkg/Include/IndustryStandard/CloudHv.h
+++ b/OvmfPkg/Include/IndustryStandard/CloudHv.h
@@ -38,9 +38,4 @@
 //
 #define CLOUDHV_SMBIOS_ADDRESS  0xf0000
 
-//
-// RSDP address
-//
-#define CLOUDHV_RSDP_ADDRESS  0xa0000
-
 #endif // __CLOUDHV_H__
-- 
2.32.0

---------------------------------------------------------------------
Intel Corporation SAS (French simplified joint stock company)
Registered headquarters: "Les Montalets"- 2, rue de Paris, 
92196 Meudon Cedex, France
Registration Number:  302 456 199 R.C.S. NANTERRE
Capital: 4,572,000 Euros

This e-mail and any attachments may contain confidential material for
the sole use of the intended recipient(s). Any review or distribution
by others is strictly prohibited. If you are not the intended
recipient, please contact the sender and delete all copies.


^ permalink raw reply related	[flat|nested] 11+ messages in thread

* [PATCH v5 6/7] OvmfPkg: CloudHv: Rely on PVH memmap instead of CMOS
  2022-03-01 13:29 [PATCH v5 0/7] CloudHv: Rely on PVH boot specification Boeuf, Sebastien
                   ` (4 preceding siblings ...)
  2022-03-01 13:29 ` [PATCH v5 5/7] OvmfPkg: CloudHv: Retrieve RSDP address from PVH Boeuf, Sebastien
@ 2022-03-01 13:29 ` Boeuf, Sebastien
  2022-03-01 13:29 ` [PATCH v5 7/7] OvmfPkg: CloudHv: Add README Boeuf, Sebastien
  6 siblings, 0 replies; 11+ messages in thread
From: Boeuf, Sebastien @ 2022-03-01 13:29 UTC (permalink / raw)
  To: devel; +Cc: jiewen.yao, jordan.l.justen, kraxel, sebastien.boeuf

From: Sebastien Boeuf <sebastien.boeuf@intel.com>

Instead of using the CMOS, the CloudHv platform relies on the list of
memmap entries provided through the PVH boot protocol to determine the
last RAM address below 4G.

Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
---
 OvmfPkg/PlatformPei/MemDetect.c     | 73 +++++++++++++++++++++++++++++
 OvmfPkg/PlatformPei/PlatformPei.inf |  2 +
 2 files changed, 75 insertions(+)

diff --git a/OvmfPkg/PlatformPei/MemDetect.c b/OvmfPkg/PlatformPei/MemDetect.c
index 1bcb5a08bc..8ecc8257f9 100644
--- a/OvmfPkg/PlatformPei/MemDetect.c
+++ b/OvmfPkg/PlatformPei/MemDetect.c
@@ -17,6 +17,7 @@ Module Name:
 #include <IndustryStandard/I440FxPiix4.h>
 #include <IndustryStandard/Q35MchIch9.h>
 #include <IndustryStandard/CloudHv.h>
+#include <IndustryStandard/Xen/arch-x86/hvm/start_info.h>
 #include <PiPei.h>
 #include <Register/Intel/SmramSaveStateMap.h>
 
@@ -315,6 +316,73 @@ ScanOrAdd64BitE820Ram (
   return EFI_SUCCESS;
 }
 
+/**
+  Returns PVH memmap
+
+  @param Entries      Pointer to PVH memmap
+  @param Count        Number of entries
+
+  @return EFI_STATUS
+**/
+EFI_STATUS
+GetPvhMemmapEntries (
+  struct hvm_memmap_table_entry  **Entries,
+  UINT32                         *Count
+  )
+{
+  UINT32                 *PVHResetVectorData;
+  struct hvm_start_info  *pvh_start_info;
+
+  PVHResetVectorData = (VOID *)(UINTN)PcdGet32 (PcdXenPvhStartOfDayStructPtr);
+  if (PVHResetVectorData == 0) {
+    return EFI_NOT_FOUND;
+  }
+
+  pvh_start_info = (struct hvm_start_info *)(UINTN)PVHResetVectorData[0];
+
+  *Entries = (struct hvm_memmap_table_entry *)(UINTN)pvh_start_info->memmap_paddr;
+  *Count   = pvh_start_info->memmap_entries;
+
+  return EFI_SUCCESS;
+}
+
+STATIC
+UINT64
+GetHighestSystemMemoryAddressFromPvhMemmap (
+  BOOLEAN  Below4gb
+  )
+{
+  struct hvm_memmap_table_entry  *Memmap;
+  UINT32                         MemmapEntriesCount;
+  struct hvm_memmap_table_entry  *Entry;
+  EFI_STATUS                     Status;
+  UINT32                         Loop;
+  UINT64                         HighestAddress;
+  UINT64                         EntryEnd;
+
+  HighestAddress = 0;
+
+  Status = GetPvhMemmapEntries (&Memmap, &MemmapEntriesCount);
+  ASSERT_EFI_ERROR (Status);
+
+  for (Loop = 0; Loop < MemmapEntriesCount; Loop++) {
+    Entry    = Memmap + Loop;
+    EntryEnd = Entry->addr + Entry->size;
+
+    if ((Entry->type == XEN_HVM_MEMMAP_TYPE_RAM) &&
+        (EntryEnd > HighestAddress))
+    {
+      if (Below4gb && (EntryEnd <= BASE_4GB)) {
+        HighestAddress = EntryEnd;
+      } else if (!Below4gb && (EntryEnd >= BASE_4GB)) {
+        HighestAddress = EntryEnd;
+      }
+    }
+  }
+
+  return HighestAddress;
+}
+
 UINT32
 GetSystemMemorySizeBelow4gb (
   VOID
@@ -325,6 +393,11 @@ GetSystemMemorySizeBelow4gb (
   UINT8       Cmos0x34;
   UINT8       Cmos0x35;
 
+  if (mHostBridgeDevId == CLOUDHV_DEVICE_ID) {
+    // Get the information from PVH memmap
+    return (UINT32)GetHighestSystemMemoryAddressFromPvhMemmap (TRUE);
+  }
+
   Status = ScanOrAdd64BitE820Ram (FALSE, &LowerMemorySize, NULL);
   if ((Status == EFI_SUCCESS) && (LowerMemorySize > 0)) {
     return (UINT32)LowerMemorySize;
diff --git a/OvmfPkg/PlatformPei/PlatformPei.inf b/OvmfPkg/PlatformPei/PlatformPei.inf
index 8ef404168c..212aa7b047 100644
--- a/OvmfPkg/PlatformPei/PlatformPei.inf
+++ b/OvmfPkg/PlatformPei/PlatformPei.inf
@@ -91,6 +91,8 @@
   gUefiOvmfPkgTokenSpaceGuid.PcdOvmfDecompressionScratchEnd
   gUefiOvmfPkgTokenSpaceGuid.PcdQ35TsegMbytes
   gUefiOvmfPkgTokenSpaceGuid.PcdQ35SmramAtDefaultSmbase
+  gUefiOvmfPkgTokenSpaceGuid.PcdXenPvhStartOfDayStructPtr
+  gUefiOvmfPkgTokenSpaceGuid.PcdXenPvhStartOfDayStructPtrSize
   gEfiMdePkgTokenSpaceGuid.PcdGuidedExtractHandlerTableAddress
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareSize
   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableSize
-- 
2.32.0

---------------------------------------------------------------------
Intel Corporation SAS (French simplified joint stock company)
Registered headquarters: "Les Montalets"- 2, rue de Paris, 
92196 Meudon Cedex, France
Registration Number:  302 456 199 R.C.S. NANTERRE
Capital: 4,572,000 Euros

This e-mail and any attachments may contain confidential material for
the sole use of the intended recipient(s). Any review or distribution
by others is strictly prohibited. If you are not the intended
recipient, please contact the sender and delete all copies.


^ permalink raw reply related	[flat|nested] 11+ messages in thread

* [PATCH v5 7/7] OvmfPkg: CloudHv: Add README
  2022-03-01 13:29 [PATCH v5 0/7] CloudHv: Rely on PVH boot specification Boeuf, Sebastien
                   ` (5 preceding siblings ...)
  2022-03-01 13:29 ` [PATCH v5 6/7] OvmfPkg: CloudHv: Rely on PVH memmap instead of CMOS Boeuf, Sebastien
@ 2022-03-01 13:29 ` Boeuf, Sebastien
  2022-03-02  7:17   ` Gerd Hoffmann
  6 siblings, 1 reply; 11+ messages in thread
From: Boeuf, Sebastien @ 2022-03-01 13:29 UTC (permalink / raw)
  To: devel; +Cc: jiewen.yao, jordan.l.justen, kraxel, sebastien.boeuf

From: Sebastien Boeuf <sebastien.boeuf@intel.com>

Add some documentation to the CloudHv target in order to clarify how to
use it and what to expect from it.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
---
 OvmfPkg/CloudHv/README | 67 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 67 insertions(+)
 create mode 100644 OvmfPkg/CloudHv/README

diff --git a/OvmfPkg/CloudHv/README b/OvmfPkg/CloudHv/README
new file mode 100644
index 0000000000..63e28860e0
--- /dev/null
+++ b/OvmfPkg/CloudHv/README
@@ -0,0 +1,67 @@
+
+CloudHv is a port of OVMF for the Cloud Hypervisor project.
+
+The Cloud Hypervisor project
+----------------------------
+
+Cloud Hypervisor is a Virtual Machine Monitor that runs on top of KVM. The
+project focuses on exclusively running modern, cloud workloads, on top of a
+limited set of hardware architectures and platforms. Cloud workloads refers to
+those that are usually run by customers inside a cloud provider. This means
+modern operating systems with most I/O handled by paravirtualised devices
+(i.e. virtio), no requirement for legacy devices, and 64-bit CPUs.
+
+https://github.com/cloud-hypervisor/cloud-hypervisor
+
+Design
+------
+
+Based on Cloud Hypervisor's motto to reduce the emulation as much as possible,
+the project logically decided to support the PVH boot specification as the only
+way of booting virtual machines. That includes both direct kernel boot and OVMF
+firmware which must be generated as PVH ELF binaries.
+PVH allows information like location of ACPI tables and location of guest RAM
+ranges to be shared without the need of an extra emulated device like a CMOS.
+
+Features
+--------
+
+* Serial console
+* EFI shell
+* virtio-pci
+
+Build
+-----
+
+The way to build the CloudHv target is as follows:
+
+OvmfPkg/build.sh -p OvmfPkg/CloudHv/CloudHvX64.dsc -a X64 -b DEBUG
+
+Usage
+-----
+
+Assuming Cloud Hypervisor is already built, one can start a virtual machine as
+follows:
+
+./cloud-hypervisor \
+    --cpus boot=1 \
+    --memory size=1G \
+    --kernel Build/CloudHvX64/DEBUG_GCC5/FV/CLOUDHV.fd \
+    --disk path=/path/to/disk.raw
+
+Releases
+--------
+
+In edk2-stable202202, CloudHv is generated as data-only binary.
+Starting with edk2-stable202205, CloudHv is generated as a PVH ELF binary to
+reduce the amount of emulation needed from Cloud Hypervisor.
+For TDX, things are handled differently and PVH is not used, which is why the
+firmware is always generated as a data-only binary.
+
++-------------------+----------------+
+|                   |    CloudHv     |
++-------------------+----------------+
+| edk2-stable202202 | Data binary    |
++-------------------+----------------+
+| edk2-stable202205 | PVH ELF binary |
++-------------------+----------------+
-- 
2.32.0

---------------------------------------------------------------------
Intel Corporation SAS (French simplified joint stock company)
Registered headquarters: "Les Montalets"- 2, rue de Paris, 
92196 Meudon Cedex, France
Registration Number:  302 456 199 R.C.S. NANTERRE
Capital: 4,572,000 Euros

This e-mail and any attachments may contain confidential material for
the sole use of the intended recipient(s). Any review or distribution
by others is strictly prohibited. If you are not the intended
recipient, please contact the sender and delete all copies.


^ permalink raw reply related	[flat|nested] 11+ messages in thread

* Re: [PATCH v5 7/7] OvmfPkg: CloudHv: Add README
  2022-03-01 13:29 ` [PATCH v5 7/7] OvmfPkg: CloudHv: Add README Boeuf, Sebastien
@ 2022-03-02  7:17   ` Gerd Hoffmann
  0 siblings, 0 replies; 11+ messages in thread
From: Gerd Hoffmann @ 2022-03-02  7:17 UTC (permalink / raw)
  To: sebastien.boeuf; +Cc: devel, jiewen.yao, jordan.l.justen

On Tue, Mar 01, 2022 at 02:29:17PM +0100, sebastien.boeuf@intel.com wrote:
> From: Sebastien Boeuf <sebastien.boeuf@intel.com>
> 
> Add some documentation to the CloudHv target in order to clarify how to
> use it and what to expect from it.
> 
> Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>

Acked-by: Gerd Hoffmann <kraxel@redhat.com>


^ permalink raw reply	[flat|nested] 11+ messages in thread

end of thread, other threads:[~2022-03-02 11:29 UTC | newest]

Thread overview: 11+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2022-03-01 13:29 [PATCH v5 0/7] CloudHv: Rely on PVH boot specification Boeuf, Sebastien
2022-03-01 13:29 ` [PATCH v5 1/7] OvmfPkg: Make the Xen ELF header generator more flexible Boeuf, Sebastien
2022-03-01 13:29 ` [PATCH v5 2/7] OvmfPkg: Xen: Use a new fdf include for the PVH ELF header Boeuf, Sebastien
2022-03-01 13:29 ` [PATCH v5 3/7] OvmfPkg: Xen: Generate fdf include file from ELF header generator Boeuf, Sebastien
2022-03-01 13:29 ` [PATCH v5 4/7] OvmfPkg: Generate CloudHv as a PVH ELF binary Boeuf, Sebastien
2022-03-02  7:17   ` [edk2-devel] " Gerd Hoffmann
2022-03-02 11:29     ` Boeuf, Sebastien
2022-03-01 13:29 ` [PATCH v5 5/7] OvmfPkg: CloudHv: Retrieve RSDP address from PVH Boeuf, Sebastien
2022-03-01 13:29 ` [PATCH v5 6/7] OvmfPkg: CloudHv: Rely on PVH memmap instead of CMOS Boeuf, Sebastien
2022-03-01 13:29 ` [PATCH v5 7/7] OvmfPkg: CloudHv: Add README Boeuf, Sebastien
2022-03-02  7:17   ` Gerd Hoffmann

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