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From: Jordan Niethe <jniethe5@gmail.com>
To: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Paul Mackerras <paulus@samba.org>,
	Michael Ellerman <mpe@ellerman.id.au>,
	"Naveen N. Rao" <naveen.n.rao@linux.vnet.ibm.com>,
	linux-kernel@vger.kernel.org,
	linuxppc-dev <linuxppc-dev@lists.ozlabs.org>
Subject: Re: [PATCH v2 09/12] powerpc/inst: Refactor PPC32 and PPC64 versions
Date: Tue, 15 Jun 2021 13:48:23 +1000	[thread overview]
Message-ID: <CACzsE9qX3TT07QXBECdB4EJq70KGB0UPn3kfk3WfS-jTQgaAvQ@mail.gmail.com> (raw)
In-Reply-To: <d54c63dcac6d190e1cc0d2fe3259d6e621928cdf.1621516826.git.christophe.leroy@csgroup.eu>

On Thu, May 20, 2021 at 11:50 PM Christophe Leroy
<christophe.leroy@csgroup.eu> wrote:
>
> ppc_inst() ppc_inst_prefixed() ppc_inst_swab() can easily
> be made common to both PPC32 and PPC64.
>
> Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
> ---
>  arch/powerpc/include/asm/inst.h | 49 +++++++++------------------------
>  1 file changed, 13 insertions(+), 36 deletions(-)
>
> diff --git a/arch/powerpc/include/asm/inst.h b/arch/powerpc/include/asm/inst.h
> index 32d318c3b180..e009e94e90b2 100644
> --- a/arch/powerpc/include/asm/inst.h
> +++ b/arch/powerpc/include/asm/inst.h
> @@ -60,9 +60,9 @@ static inline int ppc_inst_primary_opcode(struct ppc_inst x)
>         return ppc_inst_val(x) >> 26;
>  }
>
> -#ifdef CONFIG_PPC64
>  #define ppc_inst(x) ((struct ppc_inst){ .val = (x) })
>
> +#ifdef CONFIG_PPC64
>  #define ppc_inst_prefix(x, y) ((struct ppc_inst){ .val = (x), .suffix = (y) })
>
>  static inline u32 ppc_inst_suffix(struct ppc_inst x)
> @@ -70,57 +70,34 @@ static inline u32 ppc_inst_suffix(struct ppc_inst x)
>         return x.suffix;
>  }
>
> -static inline bool ppc_inst_prefixed(struct ppc_inst x)
> -{
> -       return ppc_inst_primary_opcode(x) == OP_PREFIX;
> -}
> +#else
> +#define ppc_inst_prefix(x, y) ppc_inst(x)
>
> -static inline struct ppc_inst ppc_inst_swab(struct ppc_inst x)
> +static inline u32 ppc_inst_suffix(struct ppc_inst x)
>  {
> -       return ppc_inst_prefix(swab32(ppc_inst_val(x)), swab32(ppc_inst_suffix(x)));
> +       return 0;
>  }
>
> +#endif /* CONFIG_PPC64 */
> +
>  static inline struct ppc_inst ppc_inst_read(const unsigned int *ptr)
>  {
> -       u32 val, suffix;
> -
> -       val = *ptr;
> -       if ((val >> 26) == OP_PREFIX) {
> -               suffix = *(ptr + 1);
> -               return ppc_inst_prefix(val, suffix);
> -       } else {
> -               return ppc_inst(val);
> -       }
> +       if (IS_ENABLED(CONFIG_PPC64) && (*ptr >> 26) == OP_PREFIX)
> +               return ppc_inst_prefix(*ptr, *(ptr + 1));
> +       else
> +               return ppc_inst(*ptr);
>  }
>
> -#else
> -
> -#define ppc_inst(x) ((struct ppc_inst){ .val = x })
> -
> -#define ppc_inst_prefix(x, y) ppc_inst(x)
> -
>  static inline bool ppc_inst_prefixed(struct ppc_inst x)
>  {
> -       return false;
> -}
> -
> -static inline u32 ppc_inst_suffix(struct ppc_inst x)
> -{
> -       return 0;
> +       return IS_ENABLED(CONFIG_PPC64) && ppc_inst_primary_opcode(x) == OP_PREFIX;
>  }
>
>  static inline struct ppc_inst ppc_inst_swab(struct ppc_inst x)
>  {
> -       return ppc_inst(swab32(ppc_inst_val(x)));
> -}
> -
> -static inline struct ppc_inst ppc_inst_read(const unsigned int *ptr)
> -{
> -       return ppc_inst(*ptr);
> +       return ppc_inst_prefix(swab32(ppc_inst_val(x)), swab32(ppc_inst_suffix(x)));
>  }
>
> -#endif /* CONFIG_PPC64 */
> -
>  static inline bool ppc_inst_equal(struct ppc_inst x, struct ppc_inst y)
>  {
>         if (ppc_inst_val(x) != ppc_inst_val(y))
> --
> 2.25.0
>
Reviewed by: Jordan Niethe <jniethe5@gmail.com>

  reply	other threads:[~2021-06-15  3:48 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-20 13:50 [PATCH v2 00/12] powerpc: Cleanup use of 'struct ppc_inst' Christophe Leroy
2021-05-20 13:50 ` [PATCH v2 01/12] powerpc/inst: Fix sparse detection on get_user_instr() Christophe Leroy
2021-05-20 13:50 ` [PATCH v2 02/12] powerpc/inst: Reduce casts in get_user_instr() Christophe Leroy
2021-05-20 13:50 ` [PATCH v2 03/12] powerpc/inst: Improve readability of get_user_instr() and friends Christophe Leroy
2021-05-20 13:50 ` [PATCH v2 04/12] powerpc/inst: Avoid pointer dereferencing in ppc_inst_equal() Christophe Leroy
2021-06-15  3:38   ` Jordan Niethe
2021-05-20 13:50 ` [PATCH v2 05/12] powerpc: Do not dereference code as 'struct ppc_inst' (uprobe, code-patching, feature-fixups) Christophe Leroy
2021-06-15  3:41   ` Jordan Niethe
2021-05-20 13:50 ` [PATCH v2 06/12] powerpc/lib/code-patching: Make instr_is_branch_to_addr() static Christophe Leroy
2021-06-15  3:42   ` Jordan Niethe
2021-05-20 13:50 ` [PATCH v2 07/12] powerpc/lib/code-patching: Don't use struct 'ppc_inst' for runnable code in tests Christophe Leroy
2021-06-15  3:42   ` Jordan Niethe
2021-05-20 13:50 ` [PATCH v2 08/12] powerpc: Don't use 'struct ppc_inst' to reference instruction location Christophe Leroy
2021-06-15  2:01   ` Michael Ellerman
2021-06-15  3:47     ` Jordan Niethe
2021-05-20 13:50 ` [PATCH v2 09/12] powerpc/inst: Refactor PPC32 and PPC64 versions Christophe Leroy
2021-06-15  3:48   ` Jordan Niethe [this message]
2021-05-20 13:50 ` [PATCH v2 10/12] powerpc/optprobes: Minimise casts Christophe Leroy
2021-05-20 13:50 ` [PATCH v2 11/12] powerpc/optprobes: Compact code source a bit Christophe Leroy
2021-05-20 13:50 ` [PATCH v2 12/12] powerpc/optprobes: use PPC_RAW_ macros Christophe Leroy
2021-06-08 12:46 ` [PATCH v2 00/12] powerpc: Cleanup use of 'struct ppc_inst' Christophe Leroy
2021-06-15  7:18 ` Michael Ellerman
2021-06-15  7:24   ` Christophe Leroy
2021-06-16 13:05     ` Michael Ellerman
2021-06-18  3:51 ` Michael Ellerman

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