On 2020-05-04 11:55, Will Deacon wrote:
On Mon, May 04, 2020 at 10:48:58AM +0100, Andrew Scull wrote:
Errata 1165522, 1319367 and 1530923 each allow TLB entries to be
allocated as a result of a speculative AT instruction. In order to
avoid mandating VHE on certain affected CPUs, apply the workaround to
both the nVHE and the VHE case for all affected CPUs.
Signed-off-by: Andrew Scull <ascull@xxxxxxxxxx>
CC: Marc Zyngier <maz@xxxxxxxxxx>
CC: James Morse <james.morse@xxxxxxx>
CC: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
CC: Will Deacon <will@xxxxxxxxxx>
CC: Steven Price <steven.price@xxxxxxx>
---
From v2 <20200422161346.67325-1-ascull@xxxxxxxxxx>:
- const_cap -> final_cap merge correction
- based on 5.7 rc4
---
arch/arm64/Kconfig | 39
++++++++++++++-----------------
arch/arm64/include/asm/cpucaps.h | 15 ++++++------
arch/arm64/include/asm/kvm_host.h | 4 ----
arch/arm64/include/asm/kvm_hyp.h | 2 +-
arch/arm64/kernel/cpu_errata.c | 25 +++++++++-----------
arch/arm64/kvm/hyp/switch.c | 6 ++---
arch/arm64/kvm/hyp/sysreg-sr.c | 6 +++--
arch/arm64/kvm/hyp/tlb.c | 11 +++++----
8 files changed, 50 insertions(+), 58 deletions(-)
Acked-by: Will Deacon <will@xxxxxxxxxx>
We'll probably run into some trivial conflicts with the arm64 tree, but
I'm happy to put this on a branch if it helps. Marc?
I'd rather we avoid the conflicts by not repainting all the capabilities
and just leave a capability unused until the next one fills in the slot.
But otherwise, I'll take a stable branch.
Also the current state of the KVM/arm tree is a bit crap as none of the
fixes have made it into Linus' tree yet, and I don't have a good base
for the current queue (the welcome-home branch could create havoc).
Thanks,
M.
--
Jazz is not dead. It just smells funny...
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