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Haren Myneni eca9f6e6f8 powerpc/pseries/vas: Ignore VAS update for DLPAR if copy/paste is not enabled 
The hypervisor supports user-mode NX from Power10.

pseries_vas_dlpar_cpu() is called from lparcfg_write() to update VAS
windows for DLPAR event in shared processor mode and the kernel gets
-ENOTSUPP for HCALLs if the user-mode NX is not supported. The current
VAS implementation also supports only with Radix page tables. Whereas in
dedicated processor mode, pseries_vas_notifier() is registered only if
the copy/paste feature is enabled. So instead of displaying HCALL error
messages, update VAS capabilities if the copy/paste feature is
available.

This patch ignores updating VAS capabilities in pseries_vas_dlpar_cpu()
and returns success if the copy/paste feature is not enabled. Then
lparcfg_write() completes the processor DLPAR operations without any
failures.

Fixes: 2147783d6b ("powerpc/pseries: Use lparcfg to reconfig VAS windows for DLPAR CPU")
Cc: stable@vger.kernel.org # v6.1+
Signed-off-by: Haren Myneni <haren@linux.ibm.com>
Reviewed-by: Nathan Lynch <nathanl@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/1d0e727e7dbd9a28627ef08ca9df9c86a50175e2.camel@linux.ibm.com
2023-03-29 23:01:35 +11:00
..
alpha alpha: fix lazy-FPU mis(merged/applied/whatnot) 2023-03-06 20:13:49 -05:00
arc - Daniel Verkamp has contributed a memfd series ("mm/memfd: add 2023-02-23 17:09:35 -08:00
arm ARM: SoC fixes for 6.3, part 1 2023-02-27 10:09:40 -08:00
arm64 arm64 fixes: 2023-03-02 14:57:53 -08:00
csky rch/csky patches for 6.3 2023-02-27 09:27:31 -08:00
hexagon VM_FAULT_RETRY fixes 2023-03-05 11:07:58 -08:00
ia64 cpumask: re-introduce constant-sized cpumask optimizations 2023-03-05 14:30:34 -08:00
loongarch LoongArch changes for v6.3 2023-03-01 09:27:00 -08:00
m68k m68k: Only force 030 bus error if PC not in exception table 2023-03-06 14:09:42 +01:00
microblaze VM_FAULT_RETRY fixes 2023-03-05 11:07:58 -08:00
mips Networking fixes for 6.3-rc2, including fixes from netfilter, bpf 2023-03-09 10:56:58 -08:00
nios2 VM_FAULT_RETRY fixes 2023-03-05 11:07:58 -08:00
openrisc VM_FAULT_RETRY fixes 2023-03-05 11:07:58 -08:00
parisc VM_FAULT_RETRY fixes 2023-03-05 11:07:58 -08:00
powerpc powerpc/pseries/vas: Ignore VAS update for DLPAR if copy/paste is not enabled 2023-03-29 23:01:35 +11:00
riscv RISC-V Fixes for 6.3-rc2 2023-03-10 09:19:30 -08:00
s390 s390 updates for 6.3 merge window part 2 2023-03-03 09:38:01 -08:00
sh sh: sanitize the flags on sigreturn 2023-03-09 10:01:59 -08:00
sparc VM_FAULT_RETRY fixes 2023-03-05 11:07:58 -08:00
um This pull request contains the following changes for UML: 2023-03-01 09:13:00 -08:00
x86 - Disable XSAVES on AMD Zen1 and Zen2 machines due to an erratum. No 2023-03-12 09:12:03 -07:00
xtensa - Daniel Verkamp has contributed a memfd series ("mm/memfd: add 2023-02-23 17:09:35 -08:00
.gitignore
Kconfig arch/Kconfig: fix indentation 2023-02-09 17:03:20 -08:00