Re: [Xen-devel] [PATCH v2 4/7] xen/arm32: Add skeleton to harden branch predictor aliasing attacks

2018-01-31 Thread Stefano Stabellini
On Wed, 31 Jan 2018, Julien Grall wrote: > From: Julien Grall > > Aliasing attacked against CPU branch predictors can allow an attacker to > redirect speculative control flow on some CPUs and potentially divulge > information from one context to another. > > This patch

[Xen-devel] [PATCH v2 4/7] xen/arm32: Add skeleton to harden branch predictor aliasing attacks

2018-01-31 Thread Julien Grall
From: Julien Grall Aliasing attacked against CPU branch predictors can allow an attacker to redirect speculative control flow on some CPUs and potentially divulge information from one context to another. This patch adds initiatial skeleton code behind a new Kconfig