linux-kernel - Re: [PATCH v3 00/13] arm64 kpti hardening and variant 2 workarounds

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Date:   Fri, 12 Jan 2018 15:58:53 +0000
From:   Catalin Marinas <catalin.marinas@....com>
To:     Matthias Brugger <mbrugger@...e.com>
Cc:     Will Deacon <will.deacon@....com>, lorenzo.pieralisi@....com,
        ard.biesheuvel@...aro.org, marc.zyngier@....com,
        linux-kernel@...r.kernel.org, shankerd@...eaurora.org,
        christoffer.dall@...aro.org, Yousaf Kaukab <ykaukab@...e.com>,
        linux-arm-kernel@...ts.infradead.org, jnair@...iumnetworks.com
Subject: Re: [PATCH v3 00/13] arm64 kpti hardening and variant 2 workarounds

On Tue, Jan 09, 2018 at 03:07:28PM +0100, Matthias Brugger wrote:
> On 01/08/2018 07:53 PM, Catalin Marinas wrote:
> > On Mon, Jan 08, 2018 at 05:32:25PM +0000, Will Deacon wrote:
> >> Jayachandran C (1):
> >>   arm64: cputype: Add MIDR values for Cavium ThunderX2 CPUs
> >>
> >> Marc Zyngier (3):
> >>   arm64: Move post_ttbr_update_workaround to C code
> >>   arm64: KVM: Use per-CPU vector when BP hardening is enabled
> >>   arm64: KVM: Make PSCI_VERSION a fast path
> >>
> >> Shanker Donthineni (1):
> >>   arm64: Implement branch predictor hardening for Falkor
> >>
> >> Will Deacon (8):
> >>   arm64: use RET instruction for exiting the trampoline
> >>   arm64: Kconfig: Reword UNMAP_KERNEL_AT_EL0 kconfig entry
> >>   arm64: Take into account ID_AA64PFR0_EL1.CSV3
> >>   arm64: cpufeature: Pass capability structure to ->enable callback
> >>   drivers/firmware: Expose psci_get_version through psci_ops structure
> >>   arm64: Add skeleton to harden the branch predictor against aliasing
> >>     attacks
> >>   arm64: cputype: Add missing MIDR values for Cortex-A72 and Cortex-A75
> >>   arm64: Implement branch predictor hardening for affected Cortex-A CPUs
> > 
> > I'm queuing these into the arm64 for-next/core (after some overnight
> > testing). Any additional fixes should be done on top.
> 
> I see these patches are not yet pushed to:
> git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git
> 
> Did you hit any problems in the overnight tests?

Yes, I did, but they were not related to these patches but rather the
original kpti. See:

https://marc.info/?l=linux-arm-kernel&m=151576029908809

They are pushed now.

-- 
Catalin