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Date: Fri, 17 Jul 2020 08:27:27 +0200
From: Uros Bizjak <ubizjak@...il.com>
To: Stephen Rothwell <sfr@...b.auug.org.au>
Cc: Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...e.hu>,
"H. Peter Anvin" <hpa@...or.com>,
Peter Zijlstra <peterz@...radead.org>,
Herbert Xu <herbert@...dor.apana.org.au>,
Linux Crypto List <linux-crypto@...r.kernel.org>,
Linux Next Mailing List <linux-next@...r.kernel.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
"Chang S. Bae" <chang.seok.bae@...el.com>,
Sasha Levin <sashal@...nel.org>
Subject: Re: linux-next: manual merge of the tip tree with the crypto tree
On Fri, Jul 17, 2020 at 6:47 AM Stephen Rothwell <sfr@...b.auug.org.au> wrote:
>
> Hi all,
>
> Today's linux-next merge of the tip tree got a conflict in:
>
> arch/x86/include/asm/inst.h
>
> between commit:
>
> d7866e503bdc ("crypto: x86 - Remove include/asm/inst.h")
>
> from the crypto tree and commit:
>
> eaad981291ee ("x86/entry/64: Introduce the FIND_PERCPU_BASE macro")
>
> from the tip tree.
>
> I fixed it up (I brought the file back but removed what the crypto tree
> no longer needed - see below) and can carry the fix as necessary. This
> is now fixed as far as linux-next is concerned, but any non trivial
> conflicts should be mentioned to your upstream maintainer when your tree
> is submitted for merging. You may also want to consider cooperating
> with the maintainer of the conflicting tree to minimise any particularly
> complex conflicts.
>
> I think if the crypto tree brought back this file as well (even without
> the RDPID macro, it would make this conflict much more manageable.
I will prepare a v2 that leaves needed part of inst.h.
Uros.
> /* SPDX-License-Identifier: GPL-2.0 */
> /*
> * Generate .byte code for some instructions not supported by old
> * binutils.
> */
> #ifndef X86_ASM_INST_H
> #define X86_ASM_INST_H
>
> #ifdef __ASSEMBLY__
>
> #define REG_NUM_INVALID 100
>
> #define REG_TYPE_R32 0
> #define REG_TYPE_R64 1
> #define REG_TYPE_XMM 2
> #define REG_TYPE_INVALID 100
>
> .macro R32_NUM opd r32
> \opd = REG_NUM_INVALID
> .ifc \r32,%eax
> \opd = 0
> .endif
> .ifc \r32,%ecx
> \opd = 1
> .endif
> .ifc \r32,%edx
> \opd = 2
> .endif
> .ifc \r32,%ebx
> \opd = 3
> .endif
> .ifc \r32,%esp
> \opd = 4
> .endif
> .ifc \r32,%ebp
> \opd = 5
> .endif
> .ifc \r32,%esi
> \opd = 6
> .endif
> .ifc \r32,%edi
> \opd = 7
> .endif
> #ifdef CONFIG_X86_64
> .ifc \r32,%r8d
> \opd = 8
> .endif
> .ifc \r32,%r9d
> \opd = 9
> .endif
> .ifc \r32,%r10d
> \opd = 10
> .endif
> .ifc \r32,%r11d
> \opd = 11
> .endif
> .ifc \r32,%r12d
> \opd = 12
> .endif
> .ifc \r32,%r13d
> \opd = 13
> .endif
> .ifc \r32,%r14d
> \opd = 14
> .endif
> .ifc \r32,%r15d
> \opd = 15
> .endif
> #endif
> .endm
>
> .macro R64_NUM opd r64
> \opd = REG_NUM_INVALID
> #ifdef CONFIG_X86_64
> .ifc \r64,%rax
> \opd = 0
> .endif
> .ifc \r64,%rcx
> \opd = 1
> .endif
> .ifc \r64,%rdx
> \opd = 2
> .endif
> .ifc \r64,%rbx
> \opd = 3
> .endif
> .ifc \r64,%rsp
> \opd = 4
> .endif
> .ifc \r64,%rbp
> \opd = 5
> .endif
> .ifc \r64,%rsi
> \opd = 6
> .endif
> .ifc \r64,%rdi
> \opd = 7
> .endif
> .ifc \r64,%r8
> \opd = 8
> .endif
> .ifc \r64,%r9
> \opd = 9
> .endif
> .ifc \r64,%r10
> \opd = 10
> .endif
> .ifc \r64,%r11
> \opd = 11
> .endif
> .ifc \r64,%r12
> \opd = 12
> .endif
> .ifc \r64,%r13
> \opd = 13
> .endif
> .ifc \r64,%r14
> \opd = 14
> .endif
> .ifc \r64,%r15
> \opd = 15
> .endif
> #endif
> .endm
>
> .macro XMM_NUM opd xmm
> \opd = REG_NUM_INVALID
> .ifc \xmm,%xmm0
> \opd = 0
> .endif
> .ifc \xmm,%xmm1
> \opd = 1
> .endif
> .ifc \xmm,%xmm2
> \opd = 2
> .endif
> .ifc \xmm,%xmm3
> \opd = 3
> .endif
> .ifc \xmm,%xmm4
> \opd = 4
> .endif
> .ifc \xmm,%xmm5
> \opd = 5
> .endif
> .ifc \xmm,%xmm6
> \opd = 6
> .endif
> .ifc \xmm,%xmm7
> \opd = 7
> .endif
> .ifc \xmm,%xmm8
> \opd = 8
> .endif
> .ifc \xmm,%xmm9
> \opd = 9
> .endif
> .ifc \xmm,%xmm10
> \opd = 10
> .endif
> .ifc \xmm,%xmm11
> \opd = 11
> .endif
> .ifc \xmm,%xmm12
> \opd = 12
> .endif
> .ifc \xmm,%xmm13
> \opd = 13
> .endif
> .ifc \xmm,%xmm14
> \opd = 14
> .endif
> .ifc \xmm,%xmm15
> \opd = 15
> .endif
> .endm
>
> .macro REG_TYPE type reg
> R32_NUM reg_type_r32 \reg
> R64_NUM reg_type_r64 \reg
> XMM_NUM reg_type_xmm \reg
> .if reg_type_r64 <> REG_NUM_INVALID
> \type = REG_TYPE_R64
> .elseif reg_type_r32 <> REG_NUM_INVALID
> \type = REG_TYPE_R32
> .elseif reg_type_xmm <> REG_NUM_INVALID
> \type = REG_TYPE_XMM
> .else
> \type = REG_TYPE_INVALID
> .endif
> .endm
>
> .macro PFX_OPD_SIZE
> .byte 0x66
> .endm
>
> .macro PFX_REX opd1 opd2 W=0
> .if ((\opd1 | \opd2) & 8) || \W
> .byte 0x40 | ((\opd1 & 8) >> 3) | ((\opd2 & 8) >> 1) | (\W << 3)
> .endif
> .endm
>
> .macro MODRM mod opd1 opd2
> .byte \mod | (\opd1 & 7) | ((\opd2 & 7) << 3)
> .endm
>
> .macro RDPID opd
> REG_TYPE rdpid_opd_type \opd
> .if rdpid_opd_type == REG_TYPE_R64
> R64_NUM rdpid_opd \opd
> .else
> R32_NUM rdpid_opd \opd
> .endif
> .byte 0xf3
> .if rdpid_opd > 7
> PFX_REX rdpid_opd 0
> .endif
> .byte 0x0f, 0xc7
> MODRM 0xc0 rdpid_opd 0x7
> .endm
> #endif
>
> #endif
>
> --
> Cheers,
> Stephen Rothwell
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