linux-next/Documentation/arm64
Catalin Marinas 346f6a4636 Merge branch 'kvm-arm64/erratum-1319367' of git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms into for-next/core
Similarly to erratum 1165522 that affects Cortex-A76, A57 and A72
respectively suffer from errata 1319537 and 1319367, potentially
resulting in TLB corruption if the CPU speculates an AT instruction
while switching guests.

The fix is slightly more involved since we don't have VHE to help us
here, but the idea is the same: when switching a guest in, we must
prevent any speculated AT from being able to parse the page tables
until S2 is up and running. Only at this stage can we allow AT to take
place.

For this, we always restore the guest sysregs first, except for its
SCTLR and TCR registers, which must be set with SCTLR.M=1 and
TCR.EPD{0,1} = {1, 1}, effectively disabling the PTW and TLB
allocation. Once S2 is setup, we restore the guest's SCTLR and
TCR. Similar things must be done on TLB invalidation...

* 'kvm-arm64/erratum-1319367' of git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms:
  arm64: Enable and document ARM errata 1319367 and 1319537
  arm64: KVM: Prevent speculative S1 PTW when restoring vcpu context
  arm64: KVM: Disable EL1 PTW when invalidating S2 TLBs
  arm64: KVM: Reorder system register restoration and stage-2 activation
  arm64: Add ARM64_WORKAROUND_1319367 for all A57 and A72 versions
2019-10-28 16:22:49 +00:00
..
acpi_object_usage.rst docs: arm64: convert docs to ReST and rename to .rst 2019-06-14 14:20:27 -06:00
arm-acpi.rst docs: arm64: convert docs to ReST and rename to .rst 2019-06-14 14:20:27 -06:00
booting.rst Devicetree updates for v5.3: 2019-07-11 18:35:30 -07:00
cpu-feature-registers.rst docs: arm64: convert docs to ReST and rename to .rst 2019-06-14 14:20:27 -06:00
elf_hwcaps.rst It's been a relatively busy cycle for docs: 2019-07-09 12:34:26 -07:00
hugetlbpage.rst docs: arm64: convert docs to ReST and rename to .rst 2019-06-14 14:20:27 -06:00
index.rst arm64: Add tagged-address-abi.rst to index.rst 2019-08-22 18:22:57 +01:00
kasan-offsets.sh arm64: kasan: Switch to using KASAN_SHADOW_OFFSET 2019-08-09 11:17:11 +01:00
legacy_instructions.rst docs: arm64: convert docs to ReST and rename to .rst 2019-06-14 14:20:27 -06:00
memory.rst docs: arm64: Fix indentation and doc formatting 2019-10-01 13:32:35 +01:00
perf.txt arm64: docs: Document perf event attributes 2019-04-24 15:46:26 +01:00
pointer-authentication.rst docs: arm64: convert docs to ReST and rename to .rst 2019-06-14 14:20:27 -06:00
silicon-errata.rst Merge branch 'kvm-arm64/erratum-1319367' of git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms into for-next/core 2019-10-28 16:22:49 +00:00
sve.rst It's been a relatively busy cycle for docs: 2019-07-09 12:34:26 -07:00
tagged-address-abi.rst arm64: Define Documentation/arm64/tagged-address-abi.rst 2019-08-22 12:32:26 +01:00
tagged-pointers.rst arm64: Relax Documentation/arm64/tagged-pointers.rst 2019-08-27 18:16:20 +01:00