Re: [PATCH for-stable-4.19] arm64/speculation: Support 'mitigations=' cmdline option

On Wed, Oct 09, 2019 at 11:11:21AM +0200, Ard Biesheuvel wrote:

From: Josh Poimboeuf jpoimboe@redhat.com

[ Upstream commit a111b7c0f20e13b54df2fa959b3dc0bdf1925ae6 ]

Configure arm64 runtime CPU speculation bug mitigations in accordance with the 'mitigations=' cmdline option. This affects Meltdown, Spectre v2, and Speculative Store Bypass.

The default behavior is unchanged.

Signed-off-by: Josh Poimboeuf jpoimboe@redhat.com [will: reorder checks so KASLR implies KPTI and SSBS is affected by cmdline] Signed-off-by: Will Deacon will.deacon@arm.com Signed-off-by: Ard Biesheuvel ard.biesheuvel@linaro.org

Now queued up, thanks.

greg k-h