[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Xen-devel] [PATCH v2] vmx: Restore debug registers when injecting #DB traps

>>> On 11.03.16 at 17:23, <ross.lagerwall@xxxxxxxxxx> wrote:
> Commit a929bee0e652 ("x86/vmx: Fix injection of #DB traps following
> XSA-156") prevents an infinite loop in certain #DB traps. However, it
> changed the behavior to not call hvm_hw_inject_trap() for #DB and #AC
> traps which which means that the debug registers are not restored
> correctly and nullified commit b56ae5b48c38 ("VMX: fix/adjust trap
> injection").
> To fix this, restore the original code path through hvm_inject_trap(),
> but ensure that the struct hvm_trap is populated with all the required
> data.
> Signed-off-by: Ross Lagerwall <ross.lagerwall@xxxxxxxxxx>

Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>

Xen-devel mailing list



Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.