Under "Device Drivers / IOMMU Hardware Support/ AMD IOMMU support" there is an option "AMD IOMMU Version 2 driver". However, "make" fails if this option is selected as "M". Strangely enough, when selecting as "Y" make is succesful. Reproducible: Always Actual Results: Output: ZeusGentoo /usr/src/linux # make scripts/kconfig/conf --syncconfig Kconfig CALL scripts/checksyscalls.sh CALL scripts/atomic/check-atomics.sh DESCEND objtool CHK include/generated/compile.h GZIP kernel/config_data.gz CC kernel/configs.o AR kernel/built-in.a AR drivers/iommu/built-in.a CC [M] drivers/iommu/amd/iommu_v2.o CC drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_device.o CC drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_topology.o CC drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_process.o CC drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_events.o CC drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_crat.o CC drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_iommu.o AR drivers/gpu/drm/amd/amdgpu/built-in.a AR drivers/gpu/drm/built-in.a AR drivers/gpu/built-in.a AR drivers/built-in.a GEN .version CHK include/generated/compile.h UPD include/generated/compile.h CC init/version.o AR init/built-in.a LD vmlinux.o MODPOST vmlinux.symvers MODINFO modules.builtin.modinfo GEN modules.builtin LD .tmp_vmlinux.kallsyms1 ld: drivers/gpu/drm/amd/amdkfd/kfd_iommu.o: in function `kfd_iommu_bind_process_to_device': kfd_iommu.c:(.text+0x28f): undefined reference to `amd_iommu_bind_pasid' ld: drivers/gpu/drm/amd/amdkfd/kfd_iommu.o: in function `kfd_iommu_unbind_process': kfd_iommu.c:(.text+0x2ef): undefined reference to `amd_iommu_unbind_pasid' ld: drivers/gpu/drm/amd/amdkfd/kfd_iommu.o: in function `kfd_iommu_suspend': kfd_iommu.c:(.text+0x3b4): undefined reference to `amd_iommu_set_invalidate_ctx_cb' ld: kfd_iommu.c:(.text+0x3bf): undefined reference to `amd_iommu_set_invalid_ppr_cb' ld: drivers/gpu/drm/amd/amdkfd/kfd_iommu.o: in function `kfd_iommu_resume': kfd_iommu.c:(.text+0x41d): undefined reference to `amd_iommu_init_device' ld: kfd_iommu.c:(.text+0x43c): undefined reference to `amd_iommu_set_invalidate_ctx_cb' ld: kfd_iommu.c:(.text+0x44d): undefined reference to `amd_iommu_set_invalid_ppr_cb' ld: kfd_iommu.c:(.text+0x4e2): undefined reference to `amd_iommu_set_invalidate_ctx_cb' ld: kfd_iommu.c:(.text+0x4ee): undefined reference to `amd_iommu_set_invalid_ppr_cb' ld: kfd_iommu.c:(.text+0x4f8): undefined reference to `amd_iommu_free_device' ld: kfd_iommu.c:(.text+0x512): undefined reference to `amd_iommu_bind_pasid' ld: drivers/gpu/drm/amd/amdkfd/kfd_iommu.o: in function `kfd_iommu_suspend': kfd_iommu.c:(.text+0x3d0): undefined reference to `amd_iommu_free_device' make: *** [Makefile:1139: vmlinux] Error 1 ZeusGentoo /usr/src # emerge --info Portage 2.3.103 (python 3.7.8-final-0, default/linux/amd64/17.1/desktop/gnome/systemd, gcc-10.2.0, glibc-2.31-r6, 5.8.1-gentoo-APT-2020 x86_64) ================================================================= System uname: Linux-5.8.1-gentoo-APT-2020-x86_64-AMD_Ryzen_5_2600_Six-Core_Processor-with-gentoo-2.6 KiB Mem: 16406504 total, 13565772 free KiB Swap: 4194300 total, 4194300 free Timestamp of repository gentoo: Thu, 13 Aug 2020 16:30:01 +0000 Head commit of repository gentoo: 31bc42a28f46a27c1d2eaa8fdc91cdb7d516e36c sh bash 5.0_p17 ld GNU ld (Gentoo 2.33.1 p2) 2.33.1 app-shells/bash: 5.0_p17::gentoo dev-lang/perl: 5.30.3::gentoo dev-lang/python: 2.7.18-r1::gentoo, 3.7.8-r2::gentoo, 3.8.4-r1::gentoo dev-util/cmake: 3.16.5::gentoo sys-apps/baselayout: 2.6-r1::gentoo sys-apps/sandbox: 2.18::gentoo sys-devel/autoconf: 2.13-r1::gentoo, 2.69-r4::gentoo sys-devel/automake: 1.16.1-r1::gentoo sys-devel/binutils: 2.33.1-r1::gentoo sys-devel/gcc: 10.2.0::gentoo sys-devel/gcc-config: 2.3.1::gentoo sys-devel/libtool: 2.4.6-r6::gentoo sys-devel/make: 4.2.1-r4::gentoo sys-kernel/linux-headers: 5.4-r1::gentoo (virtual/os-headers) sys-libs/glibc: 2.31-r6::gentoo Repositories: gentoo location: /var/db/repos/gentoo sync-type: rsync sync-uri: rsync://rsync.gentoo.org/gentoo-portage priority: -1000 sync-rsync-extra-opts: sync-rsync-verify-metamanifest: yes sync-rsync-verify-jobs: 1 sync-rsync-verify-max-age: 24 ACCEPT_KEYWORDS="amd64" ACCEPT_LICENSE="*" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-march=znver1 -O3 -pipe" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/share/gnupg/qualified.txt" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/dconf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo" CXXFLAGS="-march=znver1 -O3 -pipe" DISTDIR="/var/cache/distfiles" ENV_UNSET="DBUS_SESSION_BUS_ADDRESS DISPLAY GOBIN GOPATH PERL5LIB PERL5OPT PERLPREFIX PERL_CORE PERL_MB_OPT PERL_MM_OPT XAUTHORITY XDG_CACHE_HOME XDG_CONFIG_HOME XDG_DATA_HOME XDG_RUNTIME_DIR" FCFLAGS="-march=znver1 -O3 -pipe" FEATURES="assume-digests binpkg-docompress binpkg-dostrip binpkg-logs config-protect-if-modified distlocks ebuild-locks fixlafiles ipc-sandbox merge-sync multilib-strict network-sandbox news parallel-fetch pid-sandbox preserve-libs protect-owned qa-unresolved-soname-deps sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr" FFLAGS="-march=znver1 -O3 -pipe" GENTOO_MIRRORS="https://ftp.halifax.rwth-aachen.de/gentoo/ https://mirror.leaseweb.com/gentoo/ https://ftp.snt.utwente.nl/pub/os/linux/gentoo" LANG="en_US.utf8" LDFLAGS="-Wl,-O1 -Wl,--as-needed" MAKEOPTS="-j12" PKGDIR="/var/cache/binpkgs" PORTAGE_CONFIGROOT="/" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --omit-dir-times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages --exclude=/.git" PORTAGE_TMPDIR="/var/tmp" USE="X a52 aac acl acpi alsa amd64 berkdb branding btrfs bzip2 cairo cdda cli colord crypt cups dbus dri dts dvd dvdr eds emboss encode evo exif fat flac gdbm gif glade gnome gnome-keyring gnome-online-accounts gpm gstreamer gtk iconv icu introspection ipv6 jpeg lcms ldap libglvnd libnotify libsecret libtirpc mad mng mp3 mp4 mpeg multilib nautilus ncurses networkmanager nls nptl ntfs ogg opengl openmp pam pango pcre pdf png policykit ppds pulseaudio readline sdl seccomp spell split-usr ssl startup-notification svg systemd tcpd tiff tracker truetype udev udisks unicode upower usb vorbis wxwidgets x264 xattr xcb xml xv xvid zlib" ABI_X86="64" ADA_TARGET="gnat_2018" ALSA_CARDS="hda-intel" APACHE2_MODULES="authn_core authz_core socache_shmcb unixd actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" CALLIGRA_FEATURES="karbon sheets words" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" CPU_FLAGS_X86="aes avx avx2 f16c fma3 mmx mmxext pclmul popcnt sha sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock greis isync itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf skytraq superstar2 timing tsip tripmate tnt ublox ubx" INPUT_DEVICES="libinput" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php7-2 php7-3" POSTGRES_TARGETS="postgres10 postgres11" PYTHON_SINGLE_TARGET="python3_7" PYTHON_TARGETS="python2_7 python3_7" RUBY_TARGETS="ruby25" USERLAND="GNU" VIDEO_CARDS="amdgpu fbdev radeonsi vesa" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq steal rawnat logmark ipmark dhcpmac delude chaos account" Unset: CC, CPPFLAGS, CTARGET, CXX, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LC_ALL, LINGUAS, PORTAGE_BINHOST, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS
please attach the kernel config.
Created attachment 654584 [details] Kernel config, as requested
I fail to understand why this is marked "resolved". The "needinfo" part is clear of course. I just uploaded the request info, BTW.
I hit the same issue. I think it is because you have CONFIG_DRM_AMDGPU=y, which probably requires CONFIG_AMD_IOMMU_V2=y, but this isn't enforced for some reason. I strongly suspect this is an upstream issue. (Both as modules also works.)
Same issue for me, gentoo-sources-5.10.27. Also your suggested workaround works (Mark both as Y). Thanks! This should probably reported upstream.