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Re: [PATCH 01/65] x86: Introduce support for CET-IBT
- To: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Mon, 29 Nov 2021 10:27:29 +0100
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- Cc: Roger Pau Monné <roger.pau@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- Delivery-date: Mon, 29 Nov 2021 09:27:49 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 26.11.2021 13:33, Andrew Cooper wrote:
> --- a/xen/arch/x86/arch.mk
> +++ b/xen/arch/x86/arch.mk
> @@ -46,6 +46,12 @@ CFLAGS-$(CONFIG_INDIRECT_THUNK) +=
> -mindirect-branch=thunk-extern
> CFLAGS-$(CONFIG_INDIRECT_THUNK) += -mindirect-branch-register
> CFLAGS-$(CONFIG_INDIRECT_THUNK) += -fno-jump-tables
>
> +ifdef CONFIG_HAS_CC_CET_IBT
> +CFLAGS += -fcf-protection=branch -mmanual-endbr
Don't you mean to check XEN_IBT here rather than the underlying
compiler capability?
Jan
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