[Buildroot] [PATCH 1/8] board/qemu/aarch64-virt/linux.config: regenerate after kernel version bump

[Buildroot] [PATCH 1/8] board/qemu/aarch64-virt/linux.config: regenerate after kernel version bump

[Romain Naour]

Regenerate the with savedefconfig.

Signed-off-by: Romain Naour <romain.naour@gmail.com>
---
 board/qemu/aarch64-virt/linux.config | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/board/qemu/aarch64-virt/linux.config b/board/qemu/aarch64-virt/linux.config
index c9f2708ad5..948b06b0a2 100644
--- a/board/qemu/aarch64-virt/linux.config
+++ b/board/qemu/aarch64-virt/linux.config
@@ -5,13 +5,13 @@ CONFIG_HIGH_RES_TIMERS=y
 CONFIG_TASKSTATS=y
 CONFIG_SCHED_AUTOGROUP=y
 CONFIG_PROFILING=y
+CONFIG_ARCH_VEXPRESS=y
+CONFIG_COMPAT=y
 CONFIG_MODULES=y
 CONFIG_MODULE_UNLOAD=y
 CONFIG_BLK_DEV_BSGLIB=y
-CONFIG_ARCH_VEXPRESS=y
-CONFIG_TRANSPARENT_HUGEPAGE=y
 CONFIG_BINFMT_MISC=y
-CONFIG_COMPAT=y
+CONFIG_TRANSPARENT_HUGEPAGE=y
 CONFIG_NET=y
 CONFIG_PACKET=y
 CONFIG_PACKET_DIAG=y
-- 
2.25.4

[Buildroot] [PATCH 2/8] board/qemu/aarch64-virt/linux.config: add RTC PL031 driver

[Romain Naour]

Qemu for the aarch64 virt emulate an RTC PL031 device.
Enable the kernel support to allow setting the system time.

"date" now return the current time:
Sun Jul  5 20:38:50 UTC 2020

Signed-off-by: Romain Naour <romain.naour@gmail.com>
---
 board/qemu/aarch64-virt/linux.config | 1 +
 1 file changed, 1 insertion(+)

diff --git a/board/qemu/aarch64-virt/linux.config b/board/qemu/aarch64-virt/linux.config
index 948b06b0a2..49018efe95 100644
--- a/board/qemu/aarch64-virt/linux.config
+++ b/board/qemu/aarch64-virt/linux.config
@@ -45,6 +45,7 @@ CONFIG_VIRTIO_CONSOLE=y
 CONFIG_HW_RANDOM=y
 CONFIG_HW_RANDOM_VIRTIO=y
 CONFIG_RTC_CLASS=y
+CONFIG_RTC_DRV_PL031=y
 CONFIG_VIRTIO_MMIO=y
 CONFIG_VIRTIO_MMIO_CMDLINE_DEVICES=y
 CONFIG_MAILBOX=y
-- 
2.25.4

[Buildroot] [PATCH 3/8] board/qemu/aarch64-virt/linux.config: enable PCIe and PCI host generic driver

[Romain Naour]

Add the CONFIG_PCI symbol due a change in kernel 5.0 [1].
The option was previously enabled by default (default y).

"PCI: consolidate PCI config entry in drivers/pci

There is no good reason to duplicate the PCI menu in every architecture.
Instead provide a selectable HAVE_PCI symbol that indicates availability
of PCI support, and a FORCE_PCI symbol to for PCI on and the handle the
rest in drivers/pci."

Qemu aarch64 provide a PCIe Host bridge but it require CONFIG_PCI_HOST_GENERIC
enabled in the kernel.

With CONFIG_PCI_HOST_GENERIC enabled PCIe host bridge is detected:

$ dmesg
pci-host-generic 4010000000.pcie: host bridge /pcie at 10000000 ranges:
pci-host-generic 4010000000.pcie:    IO 0x3eff0000..0x3effffff -> 0x00000000
pci-host-generic 4010000000.pcie:   MEM 0x10000000..0x3efeffff -> 0x10000000
pci-host-generic 4010000000.pcie:   MEM 0x8000000000..0xffffffffff -> 0x8000000000
pci-host-generic 4010000000.pcie: ECAM at [mem 0x4010000000-0x401fffffff] for [bus 00-ff]
pci-host-generic 4010000000.pcie: PCI host bridge to bus 0000:00
pci_bus 0000:00: root bus resource [bus 00-ff]
pci_bus 0000:00: root bus resource [io  0x0000-0xffff]
pci_bus 0000:00: root bus resource [mem 0x10000000-0x3efeffff]
pci_bus 0000:00: root bus resource [mem 0x8000000000-0xffffffffff]
pci 0000:00:00.0: [1b36:0008] type 00 class 0x060000

$ lspci
00:00.0 Host bridge: Red Hat, Inc. QEMU PCIe Host bridge

[1] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=eb01d42a77785ff96b6e66a2a2e7027fc6d78e4a

Signed-off-by: Romain Naour <romain.naour@gmail.com>
---
 board/qemu/aarch64-virt/linux.config | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/board/qemu/aarch64-virt/linux.config b/board/qemu/aarch64-virt/linux.config
index 49018efe95..295bf19a7c 100644
--- a/board/qemu/aarch64-virt/linux.config
+++ b/board/qemu/aarch64-virt/linux.config
@@ -23,6 +23,8 @@ CONFIG_IP_ADVANCED_ROUTER=y
 CONFIG_BRIDGE=m
 CONFIG_NET_SCHED=y
 CONFIG_VSOCKETS=y
+CONFIG_PCI=y
+CONFIG_PCI_HOST_GENERIC=y
 CONFIG_DEVTMPFS=y
 CONFIG_DEVTMPFS_MOUNT=y
 CONFIG_VIRTIO_BLK=y
-- 
2.25.4

[Buildroot] [PATCH 4/8] board/qemu/aarch64-virt/linux.config: enable VIRTIO_GPU driver

[Romain Naour]

This driver is intended to be used by mesa virgl Gallium on the guest.
virtio-gpu is enabled by adding "-device virtio-gpu-pci" on the qemu
command line.

It's detected by lspci and dmesg log:

$ lspci
00:01.0 Display controller: Red Hat, Inc. Virtio GPU (rev 01)

$ dmesg
virtio-pci 0000:00:01.0: enabling device (0000 -> 0002)
[drm] pci: virtio-gpu-pci detected at 0000:00:01.0
[drm] virgl 3d acceleration not supported by host
[drm] EDID support available.
[TTM] Zone  kernel: Available graphics memory: 51876 KiB
[TTM] Initializing pool allocator
[TTM] Initializing DMA pool allocator
[drm] number of scanouts: 1
[drm] number of cap sets: 0
[drm] Initialized virtio_gpu 0.1.0 0 for virtio2 on minor 0

The framebuffer interface fb0 is now present in /dev

$ ls /dev/fb*
/dev/fb0

See:
https://www.kraxel.org/blog/2019/09/display-devices-in-qemu/
https://at.projects.genivi.org/wiki/display/WIK4/GENIVI+Technical+Summit+Session+Content+2018?preview=%2F28412356%2F28412481%2F2018-10-11_GeniviBangalorTechSummit_Virtio_GPU.pdf

Signed-off-by: Romain Naour <romain.naour@gmail.com>
---
 board/qemu/aarch64-virt/linux.config | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/board/qemu/aarch64-virt/linux.config b/board/qemu/aarch64-virt/linux.config
index 295bf19a7c..129a200ab0 100644
--- a/board/qemu/aarch64-virt/linux.config
+++ b/board/qemu/aarch64-virt/linux.config
@@ -40,14 +40,16 @@ CONFIG_DUMMY=y
 CONFIG_MACVLAN=y
 CONFIG_VIRTIO_NET=y
 CONFIG_NLMON=y
-CONFIG_VT_HW_CONSOLE_BINDING=y
 CONFIG_SERIAL_AMBA_PL011=y
 CONFIG_SERIAL_AMBA_PL011_CONSOLE=y
 CONFIG_VIRTIO_CONSOLE=y
 CONFIG_HW_RANDOM=y
 CONFIG_HW_RANDOM_VIRTIO=y
+CONFIG_DRM=y
+CONFIG_DRM_VIRTIO_GPU=y
 CONFIG_RTC_CLASS=y
 CONFIG_RTC_DRV_PL031=y
+CONFIG_VIRTIO_PCI=y
 CONFIG_VIRTIO_MMIO=y
 CONFIG_VIRTIO_MMIO_CMDLINE_DEVICES=y
 CONFIG_MAILBOX=y
-- 
2.25.4

[Buildroot] [PATCH 5/8] board/qemu/aarch64-virt/linux.config: enable QEMU firmware configuration (fw_cfg)

[Romain Naour]

From [1]:
This kernel option allow exporting of the QEMU firmware configuration (fw_cfg)
file entries via sysfs. Entries are found under /sys/firmware/fw_cfg when this
option is enabled and loaded.

Enable the suboption to allow the qemu_fw_cfg device to be initialized via the
kernel command line or using a module parameter.

[1] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tree/drivers/firmware/Kconfig?h=v5.4.42#n187

Signed-off-by: Romain Naour <romain.naour@gmail.com>
---
 board/qemu/aarch64-virt/linux.config | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/board/qemu/aarch64-virt/linux.config b/board/qemu/aarch64-virt/linux.config
index 129a200ab0..c21994076a 100644
--- a/board/qemu/aarch64-virt/linux.config
+++ b/board/qemu/aarch64-virt/linux.config
@@ -7,6 +7,8 @@ CONFIG_SCHED_AUTOGROUP=y
 CONFIG_PROFILING=y
 CONFIG_ARCH_VEXPRESS=y
 CONFIG_COMPAT=y
+CONFIG_FW_CFG_SYSFS=y
+CONFIG_FW_CFG_SYSFS_CMDLINE=y
 CONFIG_MODULES=y
 CONFIG_MODULE_UNLOAD=y
 CONFIG_BLK_DEV_BSGLIB=y
-- 
2.25.4

[Buildroot] [PATCH 6/8] board/qemu/aarch64-virt/linux.config: enable ARM_SMMU_V3

[Romain Naour]

From [1]:
Support for implementations of the ARM System MMU architecture
version 3 providing translation support to a PCIe root complex.

ARM SMMU is supported since Qemu v3.0.0 [2].

ARM_SMMU_V3 can be enabled with: -M virt,iommu=smmuv3

dmesg:
arm-smmu-v3 9050000.smmuv3: ias 44-bit, oas 44-bit (features 0x00000305)
arm-smmu-v3 9050000.smmuv3: allocated 262144 entries for cmdq
arm-smmu-v3 9050000.smmuv3: allocated 131072 entries for evtq

[1] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tree/drivers/iommu/Kconfig?h=v5.4.42#n390
[2] https://git.qemu.org/?p=qemu.git;a=commitdiff;h=527773eeef9f2225370f9c17c35074b2ed0ced92

Signed-off-by: Romain Naour <romain.naour@gmail.com>
---
 board/qemu/aarch64-virt/linux.config | 1 +
 1 file changed, 1 insertion(+)

diff --git a/board/qemu/aarch64-virt/linux.config b/board/qemu/aarch64-virt/linux.config
index c21994076a..88f4c43c9e 100644
--- a/board/qemu/aarch64-virt/linux.config
+++ b/board/qemu/aarch64-virt/linux.config
@@ -56,6 +56,7 @@ CONFIG_VIRTIO_MMIO=y
 CONFIG_VIRTIO_MMIO_CMDLINE_DEVICES=y
 CONFIG_MAILBOX=y
 CONFIG_PL320_MBOX=y
+CONFIG_ARM_SMMU_V3=y
 CONFIG_EXT4_FS=y
 CONFIG_TMPFS=y
 CONFIG_TMPFS_POSIX_ACL=y
-- 
2.25.4

[Buildroot] [PATCH 7/8] board/qemu/aarch64-virt/linux.config: enable TPM tis support

[Romain Naour]

Qemu aarch64 virt machine support TPM using a swtmp [1] TPM emulator
provided on the qemu command line [2].

[1] https://github.com/stefanberger/swtpm/wiki
[2] https://git.qemu.org/?p=qemu.git;a=commitdiff;h=c294ac327ca99342b90bd3a83d2cef9b447afaa7

Signed-off-by: Romain Naour <romain.naour@gmail.com>
---
 board/qemu/aarch64-virt/linux.config | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/board/qemu/aarch64-virt/linux.config b/board/qemu/aarch64-virt/linux.config
index 88f4c43c9e..227723f855 100644
--- a/board/qemu/aarch64-virt/linux.config
+++ b/board/qemu/aarch64-virt/linux.config
@@ -47,6 +47,8 @@ CONFIG_SERIAL_AMBA_PL011_CONSOLE=y
 CONFIG_VIRTIO_CONSOLE=y
 CONFIG_HW_RANDOM=y
 CONFIG_HW_RANDOM_VIRTIO=y
+CONFIG_TCG_TPM=y
+CONFIG_TCG_TIS=y
 CONFIG_DRM=y
 CONFIG_DRM_VIRTIO_GPU=y
 CONFIG_RTC_CLASS=y
-- 
2.25.4

[Buildroot] [PATCH 8/8] board/qemu/aarch64-virt/linux.config: enable VIRTIO_FS driver

[Romain Naour]

virtio-fs allow sharing a directory between the host and the guest.
It require virtiofsd daemon running before starting Qemu.

The wiki [1] recommand to enable the following kernel options:

      CONFIG_VIRTIO
      CONFIG_VIRTIO_FS
      CONFIG_DAX
      CONFIG_FS_DAX
      CONFIG_DAX_DRIVER
      CONFIG_ZONE_DEVICE

But virtio-fs works fine with only VIRTIO_FS.

Note: ZONE_DEVICE can only be enabled on aarch64 since kernel >= 5.7.
ARCH_ENABLE_MEMORY_HOTREMOVE support is missing for previous kernel [2].

[1] https://virtio-fs.gitlab.io/howto-qemu.html
[2] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=bbd6ec605c0fc286c3f8ce60b4ed44635361d58b

Signed-off-by: Romain Naour <romain.naour@gmail.com>
---
 board/qemu/aarch64-virt/linux.config | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/board/qemu/aarch64-virt/linux.config b/board/qemu/aarch64-virt/linux.config
index 227723f855..02e0812ffd 100644
--- a/board/qemu/aarch64-virt/linux.config
+++ b/board/qemu/aarch64-virt/linux.config
@@ -60,5 +60,7 @@ CONFIG_MAILBOX=y
 CONFIG_PL320_MBOX=y
 CONFIG_ARM_SMMU_V3=y
 CONFIG_EXT4_FS=y
+CONFIG_FUSE_FS=y
+CONFIG_VIRTIO_FS=y
 CONFIG_TMPFS=y
 CONFIG_TMPFS_POSIX_ACL=y
-- 
2.25.4

[Buildroot] [PATCH 8/8] board/qemu/aarch64-virt/linux.config: enable VIRTIO_FS driver

[Romain Naour]

Le 07/07/2020 ? 01:41, Romain Naour a ?crit?:
> virtio-fs allow sharing a directory between the host and the guest.
> It require virtiofsd daemon running before starting Qemu.
> 
> The wiki [1] recommand to enable the following kernel options:
> 
>       CONFIG_VIRTIO
>       CONFIG_VIRTIO_FS
>       CONFIG_DAX
>       CONFIG_FS_DAX
>       CONFIG_DAX_DRIVER
>       CONFIG_ZONE_DEVICE
> 
> But virtio-fs works fine with only VIRTIO_FS.
> 
> Note: ZONE_DEVICE can only be enabled on aarch64 since kernel >= 5.7.
> ARCH_ENABLE_MEMORY_HOTREMOVE support is missing for previous kernel [2].

Another note: The system hang while accessing the shared directory content from
the guest, this is a qemu 5.0 bug. I'm using qemu master to get a working
qemu/virtiofsd.

Best regards,
Romain

> 
> [1] https://virtio-fs.gitlab.io/howto-qemu.html
> [2] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=bbd6ec605c0fc286c3f8ce60b4ed44635361d58b
> 
> Signed-off-by: Romain Naour <romain.naour@gmail.com>
> ---
>  board/qemu/aarch64-virt/linux.config | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/board/qemu/aarch64-virt/linux.config b/board/qemu/aarch64-virt/linux.config
> index 227723f855..02e0812ffd 100644
> --- a/board/qemu/aarch64-virt/linux.config
> +++ b/board/qemu/aarch64-virt/linux.config
> @@ -60,5 +60,7 @@ CONFIG_MAILBOX=y
>  CONFIG_PL320_MBOX=y
>  CONFIG_ARM_SMMU_V3=y
>  CONFIG_EXT4_FS=y
> +CONFIG_FUSE_FS=y
> +CONFIG_VIRTIO_FS=y
>  CONFIG_TMPFS=y
>  CONFIG_TMPFS_POSIX_ACL=y
> 

[Buildroot] [PATCH 1/8] board/qemu/aarch64-virt/linux.config: regenerate after kernel version bump

[Thomas Petazzoni]

On Tue,  7 Jul 2020 01:41:44 +0200
Romain Naour <romain.naour@gmail.com> wrote:

> Regenerate the with savedefconfig.
> 
> Signed-off-by: Romain Naour <romain.naour@gmail.com>
> ---
>  board/qemu/aarch64-virt/linux.config | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)

Series applied. Thanks!

Thomas
-- 
Thomas Petazzoni, CTO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com