Merge pull request #2867 from rn/fw

Add support for driver (and CPU) firmware

examples/packet.yml

@@ -7,6 +7,7 @@ init:
   - linuxkit/runc:7b15b00b4e3507d62e3ed8d44dfe650561cd35ff
   - linuxkit/containerd:1b6b8a5884e17b26e2725cb82c436841070fca95
   - linuxkit/ca-certificates:de21b84d9b055ad9dcecc57965b654a7a24ef8e0
+  - linuxkit/firmware:8fc7d7702589b67e5b1aa72bb61cc72b47a048aa
 onboot:
   - name: rngd1
     image: linuxkit/rngd:94e01a4b16fadb053455cdc2269c4eb0b39199cd

pkg/firmware-all/Dockerfile

@@ -0,0 +1,19 @@
+FROM linuxkit/alpine:34518265c6cb63ff02074549cc5b64bef40c336f AS build
+RUN apk add --no-cache git
+
+# Make sure you also update the FW_COMMIT in ../firmware/Dockerfile
+ENV FW_URL=git://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git
+ENV FW_COMMIT=65b1c68c63f974d72610db38dfae49861117cae2
+
+RUN mkdir -p /out/lib && \
+    cd /out/lib && \
+    git clone ${FW_URL} firmware && \
+    cd firmware && \
+    git checkout ${FW_COMMIT} && \
+    rm -rf .git 
+
+FROM scratch
+WORKDIR /
+ENTRYPOINT []
+COPY --from=build /out/lib/ /lib/
+    

pkg/firmware-all/README.md

@@ -0,0 +1,8 @@
+The `firmware-all` package contains all firmware binaries from the
+[Linux firmware
+repository](https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/). It
+is quite large.
+
+For use with the LinuxKit kernel we recommend using the
+[`firmware`](../firmware/) package, which only contains the firmware
+binaries for which drivers are enabled.

pkg/firmware-all/build.yml

@@ -0,0 +1,2 @@
+image: firmware-all
+network: true

pkg/firmware/Dockerfile

@@ -0,0 +1,44 @@
+# Make modules from a recentish kernel available
+FROM linuxkit/kernel:4.14.12 AS kernel
+
+FROM linuxkit/alpine:34518265c6cb63ff02074549cc5b64bef40c336f AS build
+RUN apk add --no-cache git kmod
+
+# Clone the firmware repository
+# Make sure you also update the FW_COMMIT in ../firmware-all/Dockerfile
+ENV FW_URL=git://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git
+ENV FW_COMMIT=65b1c68c63f974d72610db38dfae49861117cae2
+WORKDIR /
+RUN git clone ${FW_URL} && \
+    cd /linux-firmware && \
+    git checkout ${FW_COMMIT}
+
+# Copy files we always need/want: Licenses, docs and AMD CPU microcode
+WORKDIR /linux-firmware
+RUN set -e && \
+    mkdir -p /out/lib/firmware && \
+    cp README WHENCE /out/lib/firmware && \
+    cp GPL-? LICENSE.* LICENCE.* /out/lib/firmware && \
+    case $(uname -m) in \
+    x86_64) \
+        cp -r amd-ucode /out/lib/firmware; \
+        ;; \
+    esac
+
+# Extract kernel modules for
+WORKDIR /
+COPY --from=kernel /kernel.tar /kernel.tar
+RUN tar xf /kernel.tar
+
+# Copy files required by the modules
+RUN set -e && \
+    for fw in $(find /lib/modules -name \*.ko -exec modinfo --field=firmware {} \;); do \
+        mkdir -p "/out/lib/firmware/$fw" && \
+        cp "/linux-firmware/$fw" "/out/lib/firmware/$fw"; \
+    done
+
+FROM scratch
+WORKDIR /
+ENTRYPOINT []
+COPY --from=build /out/lib/ /lib/
+

pkg/firmware/README.md

@@ -0,0 +1,12 @@
+The `firmware` package contains updated firmware files required by any
+driver compiled as a module. Based on the modules included in a recent
+LinuxKit kernel, copy the required firmware binaries as reported by
+'modinfo'. We deliberately do *not* pick the latest version here to
+prevent it being updated on kernel updates. Firmware revisions do not
+change very often and we expect older and newer kernels to work with a
+range of firmware binaries.
+
+Note: The current mechanism only handles firmware blobs required by
+modules and ignores firmware blobs required by drivers compiled into
+the kernel. However, with the LinuxKit kernels we typically compile
+all hardware drivers as modules.

pkg/firmware/build.yml

@@ -0,0 +1,2 @@
+image: firmware
+network: true