Re: [PATCHv4 00/19] arm64: invoke syscalls with pt_regs

[Will Deacon]

On Mon, Jul 02, 2018 at 12:03:56PM +0100, Mark Rutland wrote:
> This series reworks arm64's syscall handling to minimize the propagation
> of user-controlled register values into speculated code paths. As with
> x86 [1], a wrapper is generated for each syscall, which extracts the
> argument from a struct pt_regs. During kernel entry from userspace,
> registers are zeroed.
> 
> The arm64 kernel code directly invokes some syscalls which the x86 code
> doesn't, so I've added ksys_* wrappers for these, following the x86
> example. The rest of the series is arm64-specific.
> 
> I've pushed the series out to my arm64/syscall-regs branch [2] on
> kernel.org.

Modulo the macro label nit in the ssbd code, this series looks fine to
me.

Catalin -- have you thrown this at LTP?

Will