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| author | Radim Krčmář <rkrcmar@redhat.com> | 2018-03-28 16:09:09 +0200 |
|---|---|---|
| committer | Radim Krčmář <rkrcmar@redhat.com> | 2018-03-28 16:09:09 +0200 |
| commit | abe7a4586f0cf0ef35ed5f713ccfd4eb0770a5ac (patch) | |
| tree | c5f5bae60fdd3973b0c5d14a6405a7b66dbb5121 /Documentation | |
| parent | d32ef547fdbbeb9c4351f9d3bc84dec998a3be8c (diff) | |
| parent | dc6ed61d2f824a595033744fc1f3bf4cb98768b5 (diff) | |
| download | linux-abe7a4586f0cf0ef35ed5f713ccfd4eb0770a5ac.tar.gz linux-abe7a4586f0cf0ef35ed5f713ccfd4eb0770a5ac.tar.bz2 linux-abe7a4586f0cf0ef35ed5f713ccfd4eb0770a5ac.zip | |
Merge tag 'kvm-arm-for-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm
KVM/ARM updates for v4.17
- VHE optimizations
- EL2 address space randomization
- Variant 3a mitigation for Cortex-A57 and A72
- The usual vgic fixes
- Various minor tidying-up
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/arm64/memory.txt | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/Documentation/arm64/memory.txt b/Documentation/arm64/memory.txt index 671bc0639262..c5dab30d3389 100644 --- a/Documentation/arm64/memory.txt +++ b/Documentation/arm64/memory.txt @@ -86,9 +86,12 @@ Translation table lookup with 64KB pages: +-------------------------------------------------> [63] TTBR0/1 -When using KVM without the Virtualization Host Extensions, the hypervisor -maps kernel pages in EL2 at a fixed offset from the kernel VA. See the -kern_hyp_va macro for more details. +When using KVM without the Virtualization Host Extensions, the +hypervisor maps kernel pages in EL2 at a fixed (and potentially +random) offset from the linear mapping. See the kern_hyp_va macro and +kvm_update_va_mask function for more details. MMIO devices such as +GICv2 gets mapped next to the HYP idmap page, as do vectors when +ARM64_HARDEN_EL2_VECTORS is selected for particular CPUs. When using KVM with the Virtualization Host Extensions, no additional mappings are created, since the host kernel runs directly in EL2. |