Marrying U-Boot, UEFI and grub About Me Alexander Graf KVM and - - PowerPoint PPT Presentation

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Marrying U-Boot, UEFI and grub About Me Alexander Graf KVM and - - PowerPoint PPT Presentation

Aug 06, 2023 464 likes •2.09k views

Marrying U-Boot, UEFI and grub About Me Alexander Graf KVM and QEMU developer for SUSE Server class PowerPC KVM port Nested SVM Founding member of SUSE ARM team Booting on ARM Booting on ARM Boot ROM Booting on ARM Boot

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SLIDE 1

Marrying U-Boot, UEFI and grub

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SLIDE 2

About Me

  • Alexander Graf
  • KVM and QEMU developer for SUSE
  • Server class PowerPC KVM port
  • Nested SVM
  • Founding member of SUSE ARM team
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SLIDE 3

Booting on ARM

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SLIDE 4 Boot ROM

Booting on ARM

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SLIDE 5 Firmware Flash Boot ROM

Booting on ARM

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SLIDE 6 Firmware Flash Boot ROM SD / USB / etc

Booting on ARM

custom extlinux vboot UEFI
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SLIDE 7 Firmware, do not care Firmware Flash Boot ROM SD / USB / etc

Ideal Distro boot flow

custom extlinux vboot UEFI
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SLIDE 8 Firmware, do not care Firmware Flash Boot ROM SD / USB / etc

Ideal Distro boot flow

One protocol to
 rule them all
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SLIDE 9

UEFI boot flow

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SLIDE 10

UEFI boot flow

UEFI
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SLIDE 11

UEFI boot flow

UEFI NVRAM
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SLIDE 12

UEFI boot flow

UEFI NVRAM sda2/foo.efi mmc0/bar.efi eth0/dhcp4
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SLIDE 13

UEFI boot flow

NVRAM sda2/foo.efi mmc0/bar.efi eth0/dhcp4 UEFI
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SLIDE 14

UEFI boot flow

NVRAM sda2/foo.efi mmc0/bar.efi eth0/dhcp4

✗

UEFI
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SLIDE 15

UEFI boot flow

NVRAM sda2/foo.efi mmc0/bar.efi eth0/dhcp4

✗ ✗

UEFI
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SLIDE 16

UEFI boot flow

NVRAM sda2/foo.efi mmc0/bar.efi eth0/dhcp4

✗ ✗ ✗

UEFI
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SLIDE 17

UEFI boot flow

Removable NVRAM UEFI
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SLIDE 18

UEFI boot flow

Removable NVRAM sda/ESP/efi/
 boot/bootaa64.efi mmc0/ESP/efi/
 boot/bootaa64.efi cd0/eltorito/efi/
 boot/bootaa64.efi UEFI
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SLIDE 19

UEFI boot flow

Removable NVRAM sda/ESP/efi/
 boot/bootaa64.efi cd0/eltorito/efi/
 boot/bootaa64.efi mmc0/ESP/efi/
 boot/bootaa64.efi UEFI
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SLIDE 20

UEFI boot flow

Removable NVRAM sda/ESP/efi/
 boot/bootaa64.efi cd0/eltorito/efi/
 boot/bootaa64.efi

✗

mmc0/ESP/efi/
 boot/bootaa64.efi UEFI
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SLIDE 21 mmc0/ESP/efi/
 boot/bootaa64.efi

UEFI boot flow

Removable NVRAM sda/ESP/efi/
 boot/bootaa64.efi cd0/eltorito/efi/
 boot/bootaa64.efi

✗ ✗

UEFI
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SLIDE 22 mmc0/ESP/efi/
 boot/bootaa64.efi

UEFI boot flow

Removable NVRAM sda/ESP/efi/
 boot/bootaa64.efi cd0/eltorito/efi/
 boot/bootaa64.efi

✗ ✗

✔ UEFI
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SLIDE 23 mmc0/ESP/efi/
 boot/bootaa64.efi

UEFI boot flow

Removable NVRAM sda/ESP/efi/
 boot/bootaa64.efi cd0/eltorito/efi/
 boot/bootaa64.efi

✗ ✗

✔ bootaa64.efi UEFI
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SLIDE 24

UEFI boot flow

bootaa64.efi UEFI
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SLIDE 25

UEFI boot flow

bootaa64.efi EFI Runtime Data Console Boot Services Runtime Services Tables UEFI
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SLIDE 26

UEFI boot flow

bootaa64.efi EFI Runtime Data Console Runtime Services Tables UEFI Boot Services
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SLIDE 27

UEFI boot flow

bootaa64.efi UEFI Boot Services
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SLIDE 28 btrfs

UEFI boot flow

bootaa64.efi UEFI Boot Services
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SLIDE 29 btrfs

UEFI boot flow

bootaa64.efi UEFI Boot Services
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SLIDE 30 btrfs

UEFI boot flow

bootaa64.efi UEFI Boot Services
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SLIDE 31 btrfs

UEFI boot flow

bootaa64.efi

✗ ✗

UEFI Boot Services

✗

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SLIDE 32

UEFI boot flow

Runtime Services NVRAM UEFI
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SLIDE 33

UEFI boot flow advantages

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SLIDE 34 UEFI boot flow advantages UEFI
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SLIDE 35 Firmware, do not care UEFI boot flow advantages UEFI
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SLIDE 36 Firmware, do not care UEFI boot flow advantages UEFI
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SLIDE 37 Firmware, do not care UEFI boot flow advantages UEFI btrfs
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SLIDE 38 zfs Firmware, do not care UEFI boot flow advantages UEFI btrfs
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SLIDE 39 ext4 extension 593 zfs Firmware, do not care UEFI boot flow advantages UEFI btrfs
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SLIDE 40 ext4 extension 593 zfs Firmware, do not care UEFI boot flow advantages btrfs UEFI
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SLIDE 41 Firmware, do not care UEFI boot flow advantages UEFI
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SLIDE 42 UEFI boot flow advantages
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SLIDE 43
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SLIDE 44
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SLIDE 45 U-Boot
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SLIDE 46 U EFI_STATUS EFIAPI GetNextMonotonicCount ( OUT UINT64 *Count ) { if (Count == NULL) { return EFI_INVALID_PARAMETER; } *Count = gCurrentMonotonicCount++; return EFI_SUCCESS; }
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SLIDE 47 static efi_status_t EFIAPI efi_get_next_monotonic_count(uint64_t *count) { static uint64_t mono = 0; EFI_ENTRY("%p", count); *count = mono++; return EFI_EXIT(EFI_SUCCESS); } U-Boot
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SLIDE 48 U
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SLIDE 49 U UEFI
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SLIDE 50 U
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SLIDE 51 U Black Boxes
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SLIDE 52 U-Boot
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SLIDE 53 U-Boot Monolithic
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SLIDE 54 U-Boot
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SLIDE 55 U-Boot core
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SLIDE 56 U-Boot core BBB
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SLIDE 57 U-Boot core BBB Open
 Platform
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SLIDE 58 U-Boot core BBB Open
 Platform $ grep -R ARM configs/ | wc -l
 684
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SLIDE 59 U-Boot Foundation for black box modules Monolithic, GPL Windows coding style Linux coding style Built to fork Built to include
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SLIDE 60

UEFI interfaces

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SLIDE 61

UEFI interfaces

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SLIDE 62

UEFI interfaces

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SLIDE 63

UEFI interfaces

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SLIDE 64

UEFI interfaces

u32 block_size u64 last_block char read_only read_blocks() write_blocks()
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SLIDE 65

UEFI interfaces

u8 mac_address[32] u8 ip_address[16] u8 media_present transmit() receive()
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SLIDE 66

U-Boot interfaces

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SLIDE 67

U-Boot interfaces

ulong blksz u64 lba char removable blk_dread() blk_dwrite() 
 
 
 eth_get_ethaddr() net_send_packet() eth_rx()
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SLIDE 68

UEFI interfaces

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SLIDE 69

UEFI interfaces

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SLIDE 70

UEFI interfaces

efi_loader
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SLIDE 71 efi_loader
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SLIDE 72 efi_loader bootefi
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SLIDE 73 bootefi
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SLIDE 74 bootefi
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SLIDE 75 bootefi
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SLIDE 76 bootefi U-Boot> load mmc 0:1 $kernel_addr_r Image
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SLIDE 77 bootefi U-Boot> load mmc 0:1 $kernel_addr_r Image reading Image 568320 bytes read in 165 ms (3.3 MiB/s)
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SLIDE 78 bootefi U-Boot> bootefi $kernel_addr_r $fdt_addr_r
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SLIDE 79 bootefi U-Boot> bootefi $kernel_addr_r $fdt_addr_r ## Starting EFI application at 0x01000000 … EFI stub: Booting Linux Kernel... EFI stub: UEFI Secure Boot is enabled. EFI stub: Using DTB from configuration table EFI stub: Exiting boot services and installing virtual address map...
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SLIDE 80 bootefi U-Boot> bootefi $kernel_addr_r $fdt_addr_r ## Starting EFI application at 0x01000000 … EFI stub: Booting Linux Kernel... EFI stub: UEFI Secure Boot is enabled. EFI stub: Using DTB from configuration table EFI stub: Exiting boot services and installing virtual address map...
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SLIDE 81 bootefi
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SLIDE 82 bootefi
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SLIDE 83 bootefi KASLR
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SLIDE 84 efi_loader bootefi
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SLIDE 85 efi_loader bootefi distro boot
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SLIDE 86 distro boot
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SLIDE 87 distro boot boot_targets=mmc0 usb0 pxe dhcp
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SLIDE 88 distro boot boot_targets=mmc0 usb0 pxe dhcp extlinux
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SLIDE 89 distro boot boot_targets=mmc0 usb0 pxe dhcp extlinux boot.script
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SLIDE 90 distro boot boot_targets=mmc0 usb0 pxe dhcp extlinux boot.script EFI
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SLIDE 91 EFI distro boot
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SLIDE 92 EFI distro boot
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SLIDE 93 EFI distro boot Partition Table ESP
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SLIDE 94 EFI distro boot ESP $fdtfile
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SLIDE 95 EFI distro boot ESP $fdtfile / /dtb/ /dtb/current/ /boot/ /boot/dtb/ /boot/dtb/current/
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SLIDE 96 EFI distro boot ESP $fdtfile efi/boot/bootaa64.efi
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SLIDE 97 EFI distro boot ESP $fdtfile
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SLIDE 98 EFI distro boot ESP $fdtfile
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SLIDE 99 EFI distro boot ESP $fdtfile
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SLIDE 100 EFI distro boot ✔
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SLIDE 101 EFI distro boot ✔
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SLIDE 102 EFI distro boot
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SLIDE 103 EFI distro boot ISO9660 el torito
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SLIDE 104 EFI distro boot ISO9660 el torito el torito
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SLIDE 105 Partition Table EFI distro boot el torito el torito
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SLIDE 106 Partition Table EFI distro boot el torito $fdtfile el torito
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SLIDE 107 EFI distro boot ✔ ✔
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SLIDE 108 EFI distro boot DHCP Distro Boot
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SLIDE 109 EFI distro boot DHCP Distro Boot DHCP Server
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SLIDE 110 EFI distro boot DHCP Distro Boot DHCP Server DHCP req
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SLIDE 111 EFI & Arch VCI EFI distro boot DHCP Distro Boot DHCP Server DHCP req
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SLIDE 112 filename EFI & Arch VCI EFI distro boot DHCP Distro Boot DHCP Server DHCP req DHCP ack
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SLIDE 113 TFTP filename EFI & Arch VCI EFI distro boot DHCP Distro Boot DHCP Server DHCP req DHCP ack
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SLIDE 114 EFI distro boot ✔ ✔ ✔
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SLIDE 115

UEFI Tables

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SLIDE 116

UEFI Tables

bootaa64.efi EFI Runtime Data Console Boot Services Runtime Services UEFI Tables
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SLIDE 117

UEFI Tables

Tables
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SLIDE 118

UEFI Tables

Tables ACPI
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SLIDE 119

UEFI Tables

Tables ACPI

✗

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SLIDE 120

UEFI Tables

Tables ACPI

✗

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SLIDE 121

UEFI Tables

Tables
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SLIDE 122

Missing Features

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SLIDE 123

Missing Features

NVRAM
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SLIDE 124

Missing Features

NVRAM
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SLIDE 125

Missing Features

NVRAM UEFI RTS
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SLIDE 126

Missing Features

NVRAM UEFI RTS

✗

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SLIDE 127

Missing Features

NVRAM UEFI RTS

✗ ✗

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SLIDE 128

Missing Features

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SLIDE 129

Missing Features

init
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SLIDE 130

Missing Features

init
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SLIDE 131

Missing Features

init
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SLIDE 132

Missing Features

bootefi
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SLIDE 133

Missing Features

bootefi
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SLIDE 134

Missing Features

bootefi

✗

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SLIDE 135

Missing Features

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SLIDE 136

Missing Features

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SLIDE 137

Missing Features

EFI Shell
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SLIDE 138

Missing Features

✗

EFI Shell
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SLIDE 139

Missing Features

✗

EFI Shell

✗

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SLIDE 140

Why?

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SLIDE 141

Why?

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SLIDE 142

Why?

Department A Department B
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SLIDE 143

Why?

+

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SLIDE 144

Why?

+

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SLIDE 145

Why?

+

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SLIDE 146

Why?

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SLIDE 147

Why?

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SLIDE 148

Why?

+

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SLIDE 149

Why?

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SLIDE 150

Why?

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SLIDE 151

Why?

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SLIDE 152

Why?

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SLIDE 153

Why?

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SLIDE 154

Thank You

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SLIDE 155

Further Information

https://events.opensuse.org/conference/oSC16/program/proposal/946
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SLIDE 156 External Sources https://commons.wikimedia.org/wiki/File:Raspberry_Pi_B%2B_illustration.svg https://commons.wikimedia.org/wiki/File:Sd-card-1377140.svg http://eu.mophie.com/shop/media/catalog/product/cache/3/small_image/270x330/9df78eab33525d08d6e5fb8d27136e95/u/s/usb-micro3-40-blk_usb-tip-detail_front-back_540px.jpg https://commons.wikimedia.org/wiki/File:Circle-icons-submarine.svg https://commons.wikimedia.org/wiki/File:150-8-DIP.jpg https://commons.wikimedia.org/wiki/File:Hdd_icon.svg https://commons.wikimedia.org/wiki/File:ARM_CPU_icon.svg http://findicons.com/icon/177982/memory#
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SLIDE 157

OSA Icons

Icons received from http://www.opensecurityarchitecture.org/cms/library/icon-library
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SLIDE 158

emojione Icons

Icons received from http://www.opensecurityarchitecture.org/cms/library/icon-library
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SLIDE 159

Other Icons

http://findicons.com/icon/download/234261/clock/128/png http://findicons.com/icon/439269/button_power https://fosdem.org/2017/schedule/event/grub_new_maintainers/attachments/slides/1768/export/events/attachments/grub_new_maintainers/slides/1768/slides.pdf https://de.wikipedia.org/wiki/BeagleBoard#/media/File:Beagle_Board_big.jpg https://thenounproject.com/term/folder-tree/27307/ https://commons.wikimedia.org/wiki/File:Crystal_Project_Hardware.png http://findicons.com/icon/202613/folder_library
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SLIDE 160

Other Icons

http://tumboy.tumblr.com/post/10052361836 http://findicons.com/icon/132807/b_leg_embossed http://findicons.com/icon/237892/text_plain http://findicons.com/icon/226957/package_games_board