From: Michael Ellerman <patch-notifications@ellerman.id.au>
To: "Cédric Le Goater" <clg@kaod.org>
Cc: linuxppc-dev@lists.ozlabs.org, "Greg Kurz" <groug@kaod.org>,
"Cédric Le Goater" <clg@kaod.org>
Subject: Re: [PATCH] powerpc/xive: Prevent page fault issues in the machine crash handler
Date: Thu, 14 Nov 2019 20:08:15 +1100 (AEDT) [thread overview]
Message-ID: <47DFy74wbhz9sSX@ozlabs.org> (raw)
In-Reply-To: <20191031063100.3864-1-clg@kaod.org>
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On Thu, 2019-10-31 at 06:31:00 UTC, =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= wrote:
> When the machine crash handler is invoked, all interrupts are masked
> but interrupts which have not been started yet do not have an ESB page
> mapped in the Linux address space. This crashes the 'crash kexec'
> sequence on sPAPR guests.
>
> To fix, force the mapping of the ESB page when an interrupt is being
> mapped in the Linux IRQ number space. This is done by setting the
> initial state of the interrupt to OFF which is not necessarily the
> case on PowerNV.
>
> Signed-off-by: Cédric Le Goater <clg@kaod.org>
Applied to powerpc next, thanks.
https://git.kernel.org/powerpc/c/1ca3dec2b2dff9d286ce6cd64108bda0e98f9710
cheers
prev parent reply other threads:[~2019-11-14 10:11 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-31 6:31 [PATCH] powerpc/xive: Prevent page fault issues in the machine crash handler Cédric Le Goater
2019-10-31 8:43 ` Greg Kurz
2019-11-12 12:44 ` Michael Ellerman
2019-11-12 12:48 ` Cédric Le Goater
2019-11-14 9:08 ` Michael Ellerman [this message]
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