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| author | Nadav Amit | 2016-05-11 17:04:29 +0200 |
|---|---|---|
| committer | Radim Krčmář | 2016-06-02 17:38:50 +0200 |
| commit | b19ee2ff3b287fea48a2896a381e31319394fe58 (patch) | |
| tree | f1678e5632fa80ba384d77546a26fd2b6a963725 /arch/x86/lib/csum-partial_64.c | |
| parent | Merge tag 'kvm-arm-for-v4.7-rc2' of git://git.kernel.org/pub/scm/linux/kernel... (diff) | |
| download | kernel-qcow2-linux-b19ee2ff3b287fea48a2896a381e31319394fe58.tar.gz kernel-qcow2-linux-b19ee2ff3b287fea48a2896a381e31319394fe58.tar.xz kernel-qcow2-linux-b19ee2ff3b287fea48a2896a381e31319394fe58.zip | |
KVM: x86: avoid write-tearing of TDP
In theory, nothing prevents the compiler from write-tearing PTEs, or
split PTE writes. These partially-modified PTEs can be fetched by other
cores and cause mayhem. I have not really encountered such case in
real-life, but it does seem possible.
For example, the compiler may try to do something creative for
kvm_set_pte_rmapp() and perform multiple writes to the PTE.
Signed-off-by: Nadav Amit <nadav.amit@gmail.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Diffstat (limited to 'arch/x86/lib/csum-partial_64.c')
0 files changed, 0 insertions, 0 deletions