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From: mark.rutland@arm.com (Mark Rutland)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 2/3] KVM: arm64: Access CNTHCTL_EL2 bit fields correctly on VHE systems
Date: Fri, 13 Jan 2017 14:46:23 +0000	[thread overview]
Message-ID: <20170113144622.GC2472@leverpostej> (raw)
In-Reply-To: <20170113123612.GA31994@cbox>

On Fri, Jan 13, 2017 at 01:36:12PM +0100, Christoffer Dall wrote:
> On Fri, Jan 13, 2017 at 11:31:32AM +0000, Marc Zyngier wrote:

> Further, are we guaranteed that the static branch gets compiled into
> something that doesn't actually look at cpu_hwcap_keys, which is not
> mapped in hyp mode?

The fact that this might happen silently seems to be a larger problem.

Can we do something like the EFI stub, and ensure that (unintentional)
references to symbols outside of the hyp-stub will fail to link? That's
ensrue by some symbol mangling in drivers/firmware/efi/libstub/Makefile.

I think this may have come up before; I can't recall if there was some
reason that was problematic.

Thanks,
Mark.

  parent reply	other threads:[~2017-01-13 14:46 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-01-13 11:31 [PATCH 0/3] KVM/ARM updates for 4.10-rc4 Marc Zyngier
2017-01-13 11:31 ` [PATCH 1/3] KVM: arm/arm64: Fix occasional warning from the timer work function Marc Zyngier
2017-01-13 11:31 ` [PATCH 2/3] KVM: arm64: Access CNTHCTL_EL2 bit fields correctly on VHE systems Marc Zyngier
2017-01-13 12:36   ` Christoffer Dall
2017-01-13 13:30     ` Marc Zyngier
2017-01-13 13:46       ` Christoffer Dall
2017-01-13 13:57         ` Marc Zyngier
2017-01-13 14:14           ` Christoffer Dall
2017-01-13 14:42       ` Mark Rutland
2017-01-13 14:55         ` Mark Rutland
2017-01-13 14:56       ` Suzuki K Poulose
2017-01-13 19:04         ` Jintack Lim
2017-01-16 13:30         ` Marc Zyngier
2017-01-16 14:11           ` Marc Zyngier
2017-01-16 14:19             ` Suzuki K Poulose
2017-01-13 14:46     ` Mark Rutland [this message]
2017-01-13 14:57       ` Marc Zyngier
2017-01-13 11:31 ` [PATCH 3/3] KVM: arm/arm64: vgic: Fix deadlock on error handling Marc Zyngier
2017-01-17 16:49 ` [PATCH 0/3] KVM/ARM updates for 4.10-rc4 Radim Krčmář

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