* [meta-rockchip][PATCH] add kprobes for 32-bit kernels @ 2026-03-26 13:06 Trevor Woerner 2026-03-26 14:08 ` [yocto-patches] " Quentin Schulz 0 siblings, 1 reply; 5+ messages in thread From: Trevor Woerner @ 2026-03-26 13:06 UTC (permalink / raw) To: yocto-patches While building the modules for linux-yocto for 32-bit machines, the following error occurs: | probes/Kbuild:236: CONFIG_KALLSYMS_ALL is disabled, therefore probe "writeback" is disabled. Rebuild your kernel with this configuration option enabled in order to trace this subsystem. | wrapper/kallsyms.c:20:3: error: #error "LTTng-modules requires CONFIG_KPROBES on kernels >= 5.7.0" | 20 | # error "LTTng-modules requires CONFIG_KPROBES on kernels >= 5.7.0" Signed-off-by: Trevor Woerner <twoerner@gmail.com> --- recipes-kernel/linux/linux-rockchip.inc | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/recipes-kernel/linux/linux-rockchip.inc b/recipes-kernel/linux/linux-rockchip.inc index 6c62e849834c..4e67ff14f6e6 100644 --- a/recipes-kernel/linux/linux-rockchip.inc +++ b/recipes-kernel/linux/linux-rockchip.inc @@ -34,5 +34,8 @@ COMPATIBLE_MACHINE:soquartz = "soquartz" SRC_URI:append:rockchip = " file://rockchip-kmeta;type=kmeta;name=rockchip-kmeta;destsuffix=rockchip-kmeta" SRC_URI:append:nanopi-r4s = " file://realtek-r8169.cfg" -KERNEL_FEATURES:append:rockchip:arm = " bsp/rockchip/remove-non-rockchip-arch-arm.scc" +KERNEL_FEATURES:append:rockchip:arm = " \ + bsp/rockchip/remove-non-rockchip-arch-arm.scc \ + features/kprobes/kprobes.scc \ + " KERNEL_FEATURES:append:rockchip:aarch64 = " bsp/rockchip/remove-non-rockchip-arch-arm64.scc" -- 2.51.0 ^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [yocto-patches] [meta-rockchip][PATCH] add kprobes for 32-bit kernels 2026-03-26 13:06 [meta-rockchip][PATCH] add kprobes for 32-bit kernels Trevor Woerner @ 2026-03-26 14:08 ` Quentin Schulz 2026-03-26 20:08 ` Bruce Ashfield 0 siblings, 1 reply; 5+ messages in thread From: Quentin Schulz @ 2026-03-26 14:08 UTC (permalink / raw) To: yocto-patches Hi Trevor, On 3/26/26 2:06 PM, Trevor Woerner via lists.yoctoproject.org wrote: > While building the modules for linux-yocto for 32-bit machines, the > following error occurs: > > | probes/Kbuild:236: CONFIG_KALLSYMS_ALL is disabled, therefore probe "writeback" is disabled. Rebuild your kernel with this configuration option enabled in order to trace this subsystem. > | wrapper/kallsyms.c:20:3: error: #error "LTTng-modules requires CONFIG_KPROBES on kernels >= 5.7.0" > | 20 | # error "LTTng-modules requires CONFIG_KPROBES on kernels >= 5.7.0" > > Signed-off-by: Trevor Woerner <twoerner@gmail.com> > --- > recipes-kernel/linux/linux-rockchip.inc | 5 ++++- > 1 file changed, 4 insertions(+), 1 deletion(-) > > diff --git a/recipes-kernel/linux/linux-rockchip.inc b/recipes-kernel/linux/linux-rockchip.inc > index 6c62e849834c..4e67ff14f6e6 100644 > --- a/recipes-kernel/linux/linux-rockchip.inc > +++ b/recipes-kernel/linux/linux-rockchip.inc > @@ -34,5 +34,8 @@ COMPATIBLE_MACHINE:soquartz = "soquartz" > SRC_URI:append:rockchip = " file://rockchip-kmeta;type=kmeta;name=rockchip-kmeta;destsuffix=rockchip-kmeta" > SRC_URI:append:nanopi-r4s = " file://realtek-r8169.cfg" > > -KERNEL_FEATURES:append:rockchip:arm = " bsp/rockchip/remove-non-rockchip-arch-arm.scc" > +KERNEL_FEATURES:append:rockchip:arm = " \ > + bsp/rockchip/remove-non-rockchip-arch-arm.scc \ > + features/kprobes/kprobes.scc \ This is coming from the yocto-kernel-cache as far as I could tell. It's only available if the recipe actually points to it and only linux-yocto recipes do that. linux-mainline and linux-stable from meta-linux-mainline which you've said in the past you're using sometimes do not support that from a cursory look. What happens if there's a KERNEL_FEATURES that isn't found? Maybe we should have this in some linux-yocto bbappend instead? Or import this fragment into meta-rockchip (the downside being we need to maintain this on our own then, but it's been updated only once, 8.5y ago so not too much risk for this one I guess. Cheers, Quentin ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [yocto-patches] [meta-rockchip][PATCH] add kprobes for 32-bit kernels 2026-03-26 14:08 ` [yocto-patches] " Quentin Schulz @ 2026-03-26 20:08 ` Bruce Ashfield 2026-03-26 23:35 ` Trevor Woerner 0 siblings, 1 reply; 5+ messages in thread From: Bruce Ashfield @ 2026-03-26 20:08 UTC (permalink / raw) To: yocto-patches [-- Attachment #1: Type: text/plain, Size: 3232 bytes --] On Thu, Mar 26, 2026 at 10:08 AM Quentin Schulz via lists.yoctoproject.org <quentin.schulz=cherry.de@lists.yoctoproject.org> wrote: > Hi Trevor, > > On 3/26/26 2:06 PM, Trevor Woerner via lists.yoctoproject.org wrote: > > While building the modules for linux-yocto for 32-bit machines, the > > following error occurs: > > > > | probes/Kbuild:236: CONFIG_KALLSYMS_ALL is disabled, therefore > probe "writeback" is disabled. Rebuild your kernel with this configuration > option enabled in order to trace this subsystem. > > | wrapper/kallsyms.c:20:3: error: #error "LTTng-modules requires > CONFIG_KPROBES on kernels >= 5.7.0" > > | 20 | # error "LTTng-modules requires CONFIG_KPROBES on > kernels >= 5.7.0" > > > > Signed-off-by: Trevor Woerner <twoerner@gmail.com> > > --- > > recipes-kernel/linux/linux-rockchip.inc | 5 ++++- > > 1 file changed, 4 insertions(+), 1 deletion(-) > > > > diff --git a/recipes-kernel/linux/linux-rockchip.inc > b/recipes-kernel/linux/linux-rockchip.inc > > index 6c62e849834c..4e67ff14f6e6 100644 > > --- a/recipes-kernel/linux/linux-rockchip.inc > > +++ b/recipes-kernel/linux/linux-rockchip.inc > > @@ -34,5 +34,8 @@ COMPATIBLE_MACHINE:soquartz = "soquartz" > > SRC_URI:append:rockchip = " > file://rockchip-kmeta;type=kmeta;name=rockchip-kmeta;destsuffix=rockchip-kmeta" > > SRC_URI:append:nanopi-r4s = " file://realtek-r8169.cfg" > > > > -KERNEL_FEATURES:append:rockchip:arm = " > bsp/rockchip/remove-non-rockchip-arch-arm.scc" > > +KERNEL_FEATURES:append:rockchip:arm = " \ > > + bsp/rockchip/remove-non-rockchip-arch-arm.scc \ > > + features/kprobes/kprobes.scc \ > > This is coming from the yocto-kernel-cache as far as I could tell. It's > only available if the recipe actually points to it and only linux-yocto > recipes do that. linux-mainline and linux-stable from > meta-linux-mainline which you've said in the past you're using sometimes > do not support that from a cursory look. > > What happens if there's a KERNEL_FEATURES that isn't found? > > Maybe we should have this in some linux-yocto bbappend instead? Or > import this fragment into meta-rockchip (the downside being we need to > maintain this on our own then, but it's been updated only once, 8.5y ago > so not too much risk for this one I guess. > or just do what meta-virtualization does. See the yocto-cfg-fragments recipe. It makes the fragments available to anything using linux-yocto infrastructure, but for whatever reason doesn't have meta on it's SRC_URI Bruce > > Cheers, > Quentin > > > -=-=-=-=-=-=-=-=-=-=-=- > Links: You receive all messages sent to this group. > View/Reply Online (#3556): > https://lists.yoctoproject.org/g/yocto-patches/message/3556 > Mute This Topic: https://lists.yoctoproject.org/mt/118517725/1050810 > Group Owner: yocto-patches+owner@lists.yoctoproject.org > Unsubscribe: > https://lists.yoctoproject.org/g/yocto-patches/leave/13171493/1050810/607820704/xyzzy > [bruce.ashfield@gmail.com] > -=-=-=-=-=-=-=-=-=-=-=- > > > -- - Thou shalt not follow the NULL pointer, for chaos and madness await thee at its end - "Use the force Harry" - Gandalf, Star Trek II [-- Attachment #2: Type: text/html, Size: 5194 bytes --] ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [yocto-patches] [meta-rockchip][PATCH] add kprobes for 32-bit kernels 2026-03-26 20:08 ` Bruce Ashfield @ 2026-03-26 23:35 ` Trevor Woerner 2026-03-27 17:06 ` Bruce Ashfield 0 siblings, 1 reply; 5+ messages in thread From: Trevor Woerner @ 2026-03-26 23:35 UTC (permalink / raw) To: yocto-patches On Thu 2026-03-26 @ 04:08:16 PM, Bruce Ashfield via lists.yoctoproject.org wrote: > On Thu, Mar 26, 2026 at 10:08 AM Quentin Schulz via lists.yoctoproject.org > <quentin.schulz=cherry.de@lists.yoctoproject.org> wrote: > > > Hi Trevor, > > > > On 3/26/26 2:06 PM, Trevor Woerner via lists.yoctoproject.org wrote: > > > While building the modules for linux-yocto for 32-bit machines, the > > > following error occurs: > > > > > > | probes/Kbuild:236: CONFIG_KALLSYMS_ALL is disabled, therefore > > probe "writeback" is disabled. Rebuild your kernel with this configuration > > option enabled in order to trace this subsystem. > > > | wrapper/kallsyms.c:20:3: error: #error "LTTng-modules requires > > CONFIG_KPROBES on kernels >= 5.7.0" > > > | 20 | # error "LTTng-modules requires CONFIG_KPROBES on > > kernels >= 5.7.0" > > > > > > Signed-off-by: Trevor Woerner <twoerner@gmail.com> > > > --- > > > recipes-kernel/linux/linux-rockchip.inc | 5 ++++- > > > 1 file changed, 4 insertions(+), 1 deletion(-) > > > > > > diff --git a/recipes-kernel/linux/linux-rockchip.inc > > b/recipes-kernel/linux/linux-rockchip.inc > > > index 6c62e849834c..4e67ff14f6e6 100644 > > > --- a/recipes-kernel/linux/linux-rockchip.inc > > > +++ b/recipes-kernel/linux/linux-rockchip.inc > > > @@ -34,5 +34,8 @@ COMPATIBLE_MACHINE:soquartz = "soquartz" > > > SRC_URI:append:rockchip = " > > file://rockchip-kmeta;type=kmeta;name=rockchip-kmeta;destsuffix=rockchip-kmeta" > > > SRC_URI:append:nanopi-r4s = " file://realtek-r8169.cfg" > > > > > > -KERNEL_FEATURES:append:rockchip:arm = " > > bsp/rockchip/remove-non-rockchip-arch-arm.scc" > > > +KERNEL_FEATURES:append:rockchip:arm = " \ > > > + bsp/rockchip/remove-non-rockchip-arch-arm.scc \ > > > + features/kprobes/kprobes.scc \ > > > > This is coming from the yocto-kernel-cache as far as I could tell. It's > > only available if the recipe actually points to it and only linux-yocto > > recipes do that. linux-mainline and linux-stable from > > meta-linux-mainline which you've said in the past you're using sometimes > > do not support that from a cursory look. > > > > What happens if there's a KERNEL_FEATURES that isn't found? > > > > Maybe we should have this in some linux-yocto bbappend instead? Or > > import this fragment into meta-rockchip (the downside being we need to > > maintain this on our own then, but it's been updated only once, 8.5y ago > > so not too much risk for this one I guess. > > > > or just do what meta-virtualization does. See the yocto-cfg-fragments > recipe. > It makes the fragments available to anything using linux-yocto > infrastructure, > but for whatever reason doesn't have meta on it's SRC_URI I get the feeling this isn't a rockchip-specific issue necessarily. Are linux-yocto kernel builds for other 32-bit (probably Arm) machines seeing the same thing? Is this something I should be looking to solve more broadly? > > Bruce > > > > > > > Cheers, > > Quentin > > > > > > > > > > > > > > -- > - Thou shalt not follow the NULL pointer, for chaos and madness await thee > at its end > - "Use the force Harry" - Gandalf, Star Trek II > > > -=-=-=-=-=-=-=-=-=-=-=- > Links: You receive all messages sent to this group. > View/Reply Online (#3560): https://lists.yoctoproject.org/g/yocto-patches/message/3560 > Mute This Topic: https://lists.yoctoproject.org/mt/118517725/900817 > Group Owner: yocto-patches+owner@lists.yoctoproject.org > Unsubscribe: https://lists.yoctoproject.org/g/yocto-patches/leave/13168745/900817/63955952/xyzzy [twoerner@gmail.com] > -=-=-=-=-=-=-=-=-=-=-=- > > ^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [yocto-patches] [meta-rockchip][PATCH] add kprobes for 32-bit kernels 2026-03-26 23:35 ` Trevor Woerner @ 2026-03-27 17:06 ` Bruce Ashfield 0 siblings, 0 replies; 5+ messages in thread From: Bruce Ashfield @ 2026-03-27 17:06 UTC (permalink / raw) To: yocto-patches [-- Attachment #1: Type: text/plain, Size: 4297 bytes --] On Thu, Mar 26, 2026 at 7:35 PM Trevor Woerner via lists.yoctoproject.org <twoerner=gmail.com@lists.yoctoproject.org> wrote: > On Thu 2026-03-26 @ 04:08:16 PM, Bruce Ashfield via lists.yoctoproject.org > wrote: > > On Thu, Mar 26, 2026 at 10:08 AM Quentin Schulz via > lists.yoctoproject.org > > <quentin.schulz=cherry.de@lists.yoctoproject.org> wrote: > > > > > Hi Trevor, > > > > > > On 3/26/26 2:06 PM, Trevor Woerner via lists.yoctoproject.org wrote: > > > > While building the modules for linux-yocto for 32-bit machines, the > > > > following error occurs: > > > > > > > > | probes/Kbuild:236: CONFIG_KALLSYMS_ALL is disabled, therefore > > > probe "writeback" is disabled. Rebuild your kernel with this > configuration > > > option enabled in order to trace this subsystem. > > > > | wrapper/kallsyms.c:20:3: error: #error "LTTng-modules > requires > > > CONFIG_KPROBES on kernels >= 5.7.0" > > > > | 20 | # error "LTTng-modules requires CONFIG_KPROBES on > > > kernels >= 5.7.0" > > > > > > > > Signed-off-by: Trevor Woerner <twoerner@gmail.com> > > > > --- > > > > recipes-kernel/linux/linux-rockchip.inc | 5 ++++- > > > > 1 file changed, 4 insertions(+), 1 deletion(-) > > > > > > > > diff --git a/recipes-kernel/linux/linux-rockchip.inc > > > b/recipes-kernel/linux/linux-rockchip.inc > > > > index 6c62e849834c..4e67ff14f6e6 100644 > > > > --- a/recipes-kernel/linux/linux-rockchip.inc > > > > +++ b/recipes-kernel/linux/linux-rockchip.inc > > > > @@ -34,5 +34,8 @@ COMPATIBLE_MACHINE:soquartz = "soquartz" > > > > SRC_URI:append:rockchip = " > > > > file://rockchip-kmeta;type=kmeta;name=rockchip-kmeta;destsuffix=rockchip-kmeta" > > > > SRC_URI:append:nanopi-r4s = " file://realtek-r8169.cfg" > > > > > > > > -KERNEL_FEATURES:append:rockchip:arm = " > > > bsp/rockchip/remove-non-rockchip-arch-arm.scc" > > > > +KERNEL_FEATURES:append:rockchip:arm = " \ > > > > + bsp/rockchip/remove-non-rockchip-arch-arm.scc \ > > > > + features/kprobes/kprobes.scc \ > > > > > > This is coming from the yocto-kernel-cache as far as I could tell. It's > > > only available if the recipe actually points to it and only linux-yocto > > > recipes do that. linux-mainline and linux-stable from > > > meta-linux-mainline which you've said in the past you're using > sometimes > > > do not support that from a cursory look. > > > > > > What happens if there's a KERNEL_FEATURES that isn't found? > > > > > > Maybe we should have this in some linux-yocto bbappend instead? Or > > > import this fragment into meta-rockchip (the downside being we need to > > > maintain this on our own then, but it's been updated only once, 8.5y > ago > > > so not too much risk for this one I guess. > > > > > > > or just do what meta-virtualization does. See the yocto-cfg-fragments > > recipe. > > It makes the fragments available to anything using linux-yocto > > infrastructure, > > but for whatever reason doesn't have meta on it's SRC_URI > > I get the feeling this isn't a rockchip-specific issue necessarily. Are > linux-yocto kernel builds for other 32-bit (probably Arm) machines > seeing the same thing? Is this something I should be looking to solve > more broadly? > > The standard kernel type always includes kprobes, so they don't have this issue. Bruce > > > > Bruce > > > > > > > > > > > > Cheers, > > > Quentin > > > > > > > > > > > > > > > > > > > > > > -- > > - Thou shalt not follow the NULL pointer, for chaos and madness await > thee > > at its end > > - "Use the force Harry" - Gandalf, Star Trek II > > > > > > > > > > > > > -=-=-=-=-=-=-=-=-=-=-=- > Links: You receive all messages sent to this group. > View/Reply Online (#3561): > https://lists.yoctoproject.org/g/yocto-patches/message/3561 > Mute This Topic: https://lists.yoctoproject.org/mt/118517725/1050810 > Group Owner: yocto-patches+owner@lists.yoctoproject.org > Unsubscribe: > https://lists.yoctoproject.org/g/yocto-patches/leave/13171493/1050810/607820704/xyzzy > [bruce.ashfield@gmail.com] > -=-=-=-=-=-=-=-=-=-=-=- > > > -- - Thou shalt not follow the NULL pointer, for chaos and madness await thee at its end - "Use the force Harry" - Gandalf, Star Trek II [-- Attachment #2: Type: text/html, Size: 6953 bytes --] ^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2026-03-27 17:06 UTC | newest] Thread overview: 5+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2026-03-26 13:06 [meta-rockchip][PATCH] add kprobes for 32-bit kernels Trevor Woerner 2026-03-26 14:08 ` [yocto-patches] " Quentin Schulz 2026-03-26 20:08 ` Bruce Ashfield 2026-03-26 23:35 ` Trevor Woerner 2026-03-27 17:06 ` Bruce Ashfield
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