Re: [PATCH] arm64: mm: fix runtime fallback to 48-bt VA when 52-bit VA is enabled

2021-03-10 Thread Mark Salter
On Wed, 2021-03-10 at 14:29 +0100, Ard Biesheuvel wrote: > (+ James) > > On Wed, 10 Mar 2021 at 13:41, Ard Biesheuvel wrote: > > > > On Wed, 10 Mar 2021 at 12:18, Will Deacon wrote: > > > > > > On Tue, Mar 09, 2021 at 07:32:16PM -0500, Mark Salter wrote: > > > > I ran into an early boot soft l

Re: [PATCH] arm64: mm: fix runtime fallback to 48-bt VA when 52-bit VA is enabled

2021-03-10 Thread Ard Biesheuvel
(+ James) On Wed, 10 Mar 2021 at 13:41, Ard Biesheuvel wrote: > > On Wed, 10 Mar 2021 at 12:18, Will Deacon wrote: > > > > On Tue, Mar 09, 2021 at 07:32:16PM -0500, Mark Salter wrote: > > > I ran into an early boot soft lockup on a Qualcomm Amberwing using a v5.11 > > > kernel configured for 52-

Re: [PATCH] arm64: mm: fix runtime fallback to 48-bt VA when 52-bit VA is enabled

2021-03-10 Thread Ard Biesheuvel
On Wed, 10 Mar 2021 at 12:18, Will Deacon wrote: > > On Tue, Mar 09, 2021 at 07:32:16PM -0500, Mark Salter wrote: > > I ran into an early boot soft lockup on a Qualcomm Amberwing using a v5.11 > > kernel configured for 52-bit VA. This turned into a panic with a v5.12-rc2 > > kernel. > > > > The pr

Re: [PATCH] arm64: mm: fix runtime fallback to 48-bt VA when 52-bit VA is enabled

2021-03-10 Thread Will Deacon
On Tue, Mar 09, 2021 at 07:32:16PM -0500, Mark Salter wrote: > I ran into an early boot soft lockup on a Qualcomm Amberwing using a v5.11 > kernel configured for 52-bit VA. This turned into a panic with a v5.12-rc2 > kernel. > > The problem is that when we fall back to 48-bit VA, idmap_t0sz is not