From: "Roger Pau Monné" <roger.pau@citrix.com>
To: Jan Beulich <jbeulich@suse.com>
Cc: "xen-devel@lists.xenproject.org" <xen-devel@lists.xenproject.org>,
Wei Liu <wl@xen.org>, Andrew Cooper <andrew.cooper3@citrix.com>
Subject: Re: [PATCH 1/4] x86: replace __ASM_{CL,ST}AC
Date: Mon, 27 Jul 2020 16:55:26 +0200 [thread overview]
Message-ID: <20200727145526.GR7191@Air-de-Roger> (raw)
In-Reply-To: <fc8e042e-fef8-ac38-34d8-16b13e4b0135@suse.com>
On Wed, Jul 15, 2020 at 12:48:14PM +0200, Jan Beulich wrote:
> Introduce proper assembler macros instead, enabled only when the
> assembler itself doesn't support the insns. To avoid duplicating the
> macros for assembly and C files, have them processed into asm-macros.h.
> This in turn requires adding a multiple inclusion guard when generating
> that header.
>
> No change to generated code.
>
> Signed-off-by: Jan Beulich <jbeulich@suse.com>
>
> --- a/xen/arch/x86/Makefile
> +++ b/xen/arch/x86/Makefile
> @@ -235,7 +235,10 @@ $(BASEDIR)/include/asm-x86/asm-macros.h:
> echo '#if 0' >$@.new
> echo '.if 0' >>$@.new
> echo '#endif' >>$@.new
> + echo '#ifndef __ASM_MACROS_H__' >>$@.new
> + echo '#define __ASM_MACROS_H__' >>$@.new
> echo 'asm ( ".include \"$@\"" );' >>$@.new
> + echo '#endif /* __ASM_MACROS_H__ */' >>$@.new
> echo '#if 0' >>$@.new
> echo '.endif' >>$@.new
> cat $< >>$@.new
> --- a/xen/arch/x86/arch.mk
> +++ b/xen/arch/x86/arch.mk
> @@ -20,6 +20,7 @@ $(call as-option-add,CFLAGS,CC,"rdrand %
> $(call as-option-add,CFLAGS,CC,"rdfsbase %rax",-DHAVE_AS_FSGSBASE)
> $(call as-option-add,CFLAGS,CC,"xsaveopt (%rax)",-DHAVE_AS_XSAVEOPT)
> $(call as-option-add,CFLAGS,CC,"rdseed %eax",-DHAVE_AS_RDSEED)
> +$(call as-option-add,CFLAGS,CC,"clac",-DHAVE_AS_CLAC_STAC)
> $(call as-option-add,CFLAGS,CC,"clwb (%rax)",-DHAVE_AS_CLWB)
> $(call as-option-add,CFLAGS,CC,".equ \"x\"$$(comma)1",-DHAVE_AS_QUOTED_SYM)
> $(call as-option-add,CFLAGS,CC,"invpcid (%rax)$$(comma)%rax",-DHAVE_AS_INVPCID)
> --- a/xen/arch/x86/asm-macros.c
> +++ b/xen/arch/x86/asm-macros.c
> @@ -1 +1,2 @@
> +#include <asm/asm-defns.h>
> #include <asm/alternative-asm.h>
> --- /dev/null
> +++ b/xen/include/asm-x86/asm-defns.h
Maybe this could be asm-insn.h or a different name? I find it
confusing to have asm-defns.h and an asm_defs.h.
Thanks, Roger.
next prev parent reply other threads:[~2020-07-27 14:55 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-15 10:47 [PATCH 0/4] x86: some assembler macro rework Jan Beulich
2020-07-15 10:48 ` [PATCH 1/4] x86: replace __ASM_{CL,ST}AC Jan Beulich
2020-07-27 14:55 ` Roger Pau Monné [this message]
2020-07-27 19:47 ` Jan Beulich
2020-07-28 9:06 ` Roger Pau Monné
2020-07-31 8:05 ` Jan Beulich
2020-07-31 8:12 ` Roger Pau Monné
2020-07-28 13:59 ` Andrew Cooper
2020-07-28 19:24 ` Jan Beulich
2020-07-28 13:55 ` Andrew Cooper
2020-07-28 19:18 ` Jan Beulich
2020-07-31 8:00 ` Jan Beulich
2020-07-15 10:48 ` [PATCH 2/4] x86: reduce CET-SS related #ifdef-ary Jan Beulich
2020-07-27 15:00 ` Roger Pau Monné
2020-07-27 19:50 ` Jan Beulich
2020-07-28 8:36 ` Roger Pau Monné
2020-07-28 14:29 ` Andrew Cooper
2020-07-28 19:33 ` Jan Beulich
2020-07-15 10:49 ` [PATCH 3/4] x86: drop ASM_{CL,ST}AC Jan Beulich
2020-07-27 15:10 ` Roger Pau Monné
2020-07-28 14:51 ` Andrew Cooper
2020-07-28 19:41 ` Jan Beulich
2020-07-15 10:49 ` [PATCH 4/4] x86: fold indirect_thunk_asm.h into asm-defns.h Jan Beulich
2020-07-27 15:16 ` Roger Pau Monné
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