linux-kernel - Re: [PATCH V2] powerpc/pseries/svm: Remove unwanted check for shared_lppaca

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Date:   Thu, 16 Jul 2020 22:47:49 +1000 (AEST)
From:   Michael Ellerman <patch-notifications@...erman.id.au>
To:     Satheesh Rajendran <sathnaga@...ux.vnet.ibm.com>,
        linuxppc-dev@...ts.ozlabs.org
Cc:     Laurent Dufour <ldufour@...ux.ibm.com>,
        linux-kernel@...r.kernel.org,
        Thiago Jung Bauermann <bauerman@...ux.ibm.com>,
        Ram Pai <linuxram@...ibm.com>,
        Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>
Subject: Re: [PATCH V2] powerpc/pseries/svm: Remove unwanted check for shared_lppaca_size

On Fri, 19 Jun 2020 12:31:13 +0530, Satheesh Rajendran wrote:
> Early secure guest boot hits the below crash while booting with
> vcpus numbers aligned with page boundary for PAGE size of 64k
> and LPPACA size of 1k i.e 64, 128 etc, due to the BUG_ON assert
> for shared_lppaca_total_size equal to shared_lppaca_size,
> 
>  [    0.000000] Partition configured for 64 cpus.
>  [    0.000000] CPU maps initialized for 1 thread per core
>  [    0.000000] ------------[ cut here ]------------
>  [    0.000000] kernel BUG at arch/powerpc/kernel/paca.c:89!
>  [    0.000000] Oops: Exception in kernel mode, sig: 5 [#1]
>  [    0.000000] LE PAGE_SIZE=64K MMU=Radix SMP NR_CPUS=2048 NUMA pSeries
> 
> [...]

Applied to powerpc/fixes.

[1/1] powerpc/pseries/svm: Fix incorrect check for shared_lppaca_size
      https://git.kernel.org/powerpc/c/b710d27bf72068b15b2f0305d825988183e2ff28

cheers