feat: build Talos with support for x86-64-v2 microarchitecture

See https://github.com/golang/go/wiki/MinimumRequirements#microarchitecture-support

This relies on new Go 1.18 feature to use more efficient x86-64
instructions.

Signed-off-by: Andrey Smirnov <andrey.smirnov@talos-systems.com>

Author: smira

Dockerfile

@@ -278,7 +278,8 @@ FROM base AS init-build-amd64
 WORKDIR /src/internal/app/init
 ARG GO_BUILDFLAGS
 ARG GO_LDFLAGS
-RUN --mount=type=cache,target=/.cache GOOS=linux GOARCH=amd64 go build ${GO_BUILDFLAGS} -ldflags "${GO_LDFLAGS}" -o /init
+ARG GOAMD64
+RUN --mount=type=cache,target=/.cache GOOS=linux GOARCH=amd64 GOAMD64=${GOAMD64} go build ${GO_BUILDFLAGS} -ldflags "${GO_LDFLAGS}" -o /init
 RUN chmod +x /init
 
 FROM base AS init-build-arm64
@@ -299,7 +300,8 @@ FROM base AS machined-build-amd64
 WORKDIR /src/internal/app/machined
 ARG GO_BUILDFLAGS
 ARG GO_LDFLAGS
-RUN --mount=type=cache,target=/.cache GOOS=linux GOARCH=amd64 go build ${GO_BUILDFLAGS} -ldflags "${GO_LDFLAGS}" -o /machined
+ARG GOAMD64
+RUN --mount=type=cache,target=/.cache GOOS=linux GOARCH=amd64 GOAMD64=${GOAMD64} go build ${GO_BUILDFLAGS} -ldflags "${GO_LDFLAGS}" -o /machined
 RUN chmod +x /machined
 
 FROM base AS machined-build-arm64
@@ -320,7 +322,8 @@ FROM base AS talosctl-linux-amd64-build
 WORKDIR /src/cmd/talosctl
 ARG GO_BUILDFLAGS
 ARG GO_LDFLAGS
-RUN --mount=type=cache,target=/.cache GOOS=linux GOARCH=amd64 go build ${GO_BUILDFLAGS} -ldflags "${GO_LDFLAGS}" -o /talosctl-linux-amd64
+ARG GOAMD64
+RUN --mount=type=cache,target=/.cache GOOS=linux GOARCH=amd64 GOAMD64=${GOAMD64} go build ${GO_BUILDFLAGS} -ldflags "${GO_LDFLAGS}" -o /talosctl-linux-amd64
 RUN chmod +x /talosctl-linux-amd64
 
 FROM base AS talosctl-linux-arm64-build
@@ -355,7 +358,8 @@ FROM base AS talosctl-darwin-amd64-build
 WORKDIR /src/cmd/talosctl
 ARG GO_BUILDFLAGS
 ARG GO_LDFLAGS
-RUN --mount=type=cache,target=/.cache GOOS=darwin GOARCH=amd64 go build ${GO_BUILDFLAGS} -ldflags "${GO_LDFLAGS}" -o /talosctl-darwin-amd64
+ARG GOAMD64
+RUN --mount=type=cache,target=/.cache GOOS=darwin GOARCH=amd64 GOAMD64=${GOAMD64} go build ${GO_BUILDFLAGS} -ldflags "${GO_LDFLAGS}" -o /talosctl-darwin-amd64
 RUN chmod +x /talosctl-darwin-amd64
 
 FROM base AS talosctl-darwin-arm64-build
@@ -373,7 +377,8 @@ FROM base AS talosctl-windows-amd64-build
 WORKDIR /src/cmd/talosctl
 ARG GO_BUILDFLAGS
 ARG GO_LDFLAGS
-RUN --mount=type=cache,target=/.cache GOOS=windows GOARCH=amd64 go build ${GO_BUILDFLAGS} -ldflags "${GO_LDFLAGS}" -o /talosctl-windows-amd64.exe
+ARG GOAMD64
+RUN --mount=type=cache,target=/.cache GOOS=windows GOARCH=amd64 GOAMD64=${GOAMD64} go build ${GO_BUILDFLAGS} -ldflags "${GO_LDFLAGS}" -o /talosctl-windows-amd64.exe
 
 FROM scratch AS talosctl-windows
 COPY --from=talosctl-windows-amd64-build /talosctl-windows-amd64.exe /talosctl-windows-amd64.exe
@@ -655,7 +660,8 @@ RUN --security=insecure --mount=type=cache,id=testspace,target=/tmp --mount=type
 FROM base AS integration-test-linux-build
 ARG GO_BUILDFLAGS
 ARG GO_LDFLAGS
-RUN --mount=type=cache,target=/.cache GOOS=linux GOARCH=amd64 go test -v -c ${GO_BUILDFLAGS} \
+ARG GOAMD64
+RUN --mount=type=cache,target=/.cache GOOS=linux GOARCH=amd64 GOAMD64=${GOAMD64} go test -v -c ${GO_BUILDFLAGS} \
     -ldflags "${GO_LDFLAGS}" \
     -tags integration,integration_api,integration_cli,integration_k8s \
     ./internal/integration
@@ -666,7 +672,8 @@ COPY --from=integration-test-linux-build /src/integration.test /integration-test
 FROM base AS integration-test-darwin-build
 ARG GO_BUILDFLAGS
 ARG GO_LDFLAGS
-RUN --mount=type=cache,target=/.cache GOOS=darwin GOARCH=amd64 go test -v -c ${GO_BUILDFLAGS} \
+ARG GOAMD64
+RUN --mount=type=cache,target=/.cache GOOS=darwin GOARCH=amd64 GOAMD64=${GOAMD64} go test -v -c ${GO_BUILDFLAGS} \
     -ldflags "${GO_LDFLAGS}" \
     -tags integration,integration_api,integration_cli,integration_k8s \
     ./internal/integration
@@ -679,7 +686,8 @@ COPY --from=integration-test-darwin-build /src/integration.test /integration-tes
 FROM base AS integration-test-provision-linux-build
 ARG GO_BUILDFLAGS
 ARG GO_LDFLAGS
-RUN --mount=type=cache,target=/.cache GOOS=linux GOARCH=amd64 go test -v -c ${GO_BUILDFLAGS} \
+ARG GOAMD64
+RUN --mount=type=cache,target=/.cache GOOS=linux GOARCH=amd64 GOAMD64=${GOAMD64} go test -v -c ${GO_BUILDFLAGS} \
     -ldflags "${GO_LDFLAGS}" \
     -tags integration,integration_provision \
     ./internal/integration

Makefile

@@ -44,6 +44,7 @@ INSTALLER_ARCH ?= all
 CGO_ENABLED ?= 0
 GO_BUILDFLAGS ?=
 GO_LDFLAGS ?=
+GOAMD64 ?= v2
 
 WITH_RACE ?= false
 WITH_DEBUG ?= false
@@ -90,6 +91,7 @@ COMMON_ARGS += --build-arg=INSTALLER_ARCH=$(INSTALLER_ARCH)
 COMMON_ARGS += --build-arg=CGO_ENABLED=$(CGO_ENABLED)
 COMMON_ARGS += --build-arg=GO_BUILDFLAGS="$(GO_BUILDFLAGS)"
 COMMON_ARGS += --build-arg=GO_LDFLAGS="$(GO_LDFLAGS)"
+COMMON_ARGS += --build-arg=GOAMD64="$(GOAMD64)"
 COMMON_ARGS += --build-arg=http_proxy=$(http_proxy)
 COMMON_ARGS += --build-arg=https_proxy=$(https_proxy)
 COMMON_ARGS += --build-arg=NAME=$(NAME)

hack/release.toml

@@ -22,6 +22,8 @@ preface = """\
 * Kubernetes: 1.24.0-beta.0
 * Flannel: 0.17.0
 * runc: 1.1.1
+
+Talos is built with Go 1.18.
 """
 
     [notes.eudev]
@@ -76,6 +78,13 @@ plugins:
 ```
 
 The policy is part of the Talos machine configuration, and it can be modified to suite your needs.
+"""
+
+    [notes.x86_64]
+        title = "x86-64 Architecture"
+        description="""\
+Talos is built for x86-64 architecture with support for [x86-64-v2 microarchitecture level](https://en.wikipedia.org/wiki/X86-64#Microarchitecture_levels),
+so Talos no longer runs on processors supporting only baseline `x86-64` microarchitecture (before 2009).
 """
 
 [make_deps]