Hi Tyler,
Yes, we need to backport this patchset to all the current supported
kernel. Since most of the supported kernel contains the whole RFI infra
structure, I do not expect it to be hard. If you need help, I can find
someone to help on the backport.
Regarding the problem you are facing, I talked to the powerpc maintainer
(Michael Ellerman) and he suggested squashing the warning using
something as the code below. He will be also sending the patch upstream.
```
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index 66f2b6299c40..44c30dd38067 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -880,7 +880,7 @@ void rfi_flush_enable(bool enable)
rfi_flush = enable;
}
-static void init_fallback_flush(void)
+static void __ref init_fallback_flush(void)
{
u64 l1d_size, limit;
int cpu;
```
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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1760099
Title:
Additional spectre and meltdown patches
Status in The Ubuntu-power-systems project:
Triaged
Status in linux package in Ubuntu:
Triaged
Status in linux source package in Trusty:
Triaged
Status in linux source package in Xenial:
Triaged
Status in linux source package in Artful:
Triaged
Status in linux source package in Bionic:
Triaged
Bug description:
== Comment: #0 - Breno Leitao <bren...@br.ibm.com> - 2018-03-29 08:53:56 ==
Hi Canonical,
There are some additional patches for Spectre and Meltdown that is
required on ppc64el. We would need to have them included on all Ubuntu
kernels.
This is the patch series:
[v2,10/10] powerpc/64s: Wire up cpu_show_spectre_v2() [v2,01/10] powerpc:
Add security feature flags for Spectre/Meltdown
[v2,09/10] powerpc/64s: Wire up cpu_show_spectre_v1() [v2,01/10] powerpc:
Add security feature flags for Spectre/Meltdown
[v2,08/10] powerpc/pseries: Use the security flags in
pseries_setup_rfi_flush() [v2,01/10] powerpc: Add security feature
flags for Spectre/Meltdown
[v2,07/10] powerpc/powernv: Use the security flags in pnv_setup_rfi_flush()
[v2,01/10] powerpc: Add security feature flags for Spectre/Meltdown
[v2,06/10] powerpc/64s: Enhance the information in cpu_show_meltdown()
[v2,01/10] powerpc: Add security feature flags for Spectre/Meltdown
[v2,05/10] powerpc/64s: Move cpu_show_meltdown() [v2,01/10] powerpc:
Add security feature flags for Spectre/Meltdown
[v2,04/10] powerpc/powernv: Set or clear security feature flags
[v2,01/10] powerpc: Add security feature flags for Spectre/Meltdown
[v2,03/10] powerpc/pseries: Set or clear security feature flags
[v2,01/10] powerpc: Add security feature flags for Spectre/Meltdown
[v2,02/10] powerpc/pseries: Add new H_GET_CPU_CHARACTERISTICS flags
[v2,01/10] powerpc: Add security feature flags for Spectre/Meltdown
[v2,01/10] powerpc: Add security feature flags for Spectre/Meltdown
[v2,01/10] powerpc: Add security feature flags for Spectre/Meltdown
http://patchwork.ozlabs.org/project/linuxppc-
dev/list/?series=36012&state=*
== Comment: #1 - Breno Leitao <bren...@br.ibm.com> - 2018-03-29 08:55:48 ==
This is a better formatted patch series list:
[v2,10/10] powerpc/64s: Wire up cpu_show_spectre_v2()
[v2,09/10] powerpc/64s: Wire up cpu_show_spectre_v1()
[v2,08/10] powerpc/pseries: Use the security flags in
pseries_setup_rfi_flush()
[v2,07/10] powerpc/powernv: Use the security flags in pnv_setup_rfi_flus()
[v2,06/10] powerpc/64s: Enhance the information in cpu_show_meltdown()
[v2,05/10] powerpc/64s: Move cpu_show_meltdown()
[v2,04/10] powerpc/powernv: Set or clear security feature flags
[v2,03/10] powerpc/pseries: Set or clear security feature flags
[v2,02/10] powerpc/pseries: Add new H_GET_CPU_CHARACTERISTICS flags
[v2,01/10] powerpc: Add security feature flags for Spectre/Meltdown
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