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0c3beacf68
Several architectures support text patching, but they name the header files that declare patching functions differently. Make all such headers consistently named text-patching.h and add an empty header in asm-generic for architectures that do not support text patching. Link: https://lkml.kernel.org/r/20241023162711.2579610-4-rppt@kernel.org Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> # m68k Acked-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Luis Chamberlain <mcgrof@kernel.org> Tested-by: kdevops <kdevops@lists.linux.dev> Cc: Andreas Larsson <andreas@gaisler.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Ard Biesheuvel <ardb@kernel.org> Cc: Borislav Petkov (AMD) <bp@alien8.de> Cc: Brian Cain <bcain@quicinc.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Dinh Nguyen <dinguyen@kernel.org> Cc: Guo Ren <guoren@kernel.org> Cc: Helge Deller <deller@gmx.de> Cc: Huacai Chen <chenhuacai@kernel.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Johannes Berg <johannes@sipsolutions.net> Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Cc: Kent Overstreet <kent.overstreet@linux.dev> Cc: Liam R. Howlett <Liam.Howlett@Oracle.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Masami Hiramatsu (Google) <mhiramat@kernel.org> Cc: Matt Turner <mattst88@gmail.com> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Michal Simek <monstr@monstr.eu> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Richard Weinberger <richard@nod.at> Cc: Russell King <linux@armlinux.org.uk> Cc: Song Liu <song@kernel.org> Cc: Stafford Horne <shorne@gmail.com> Cc: Steven Rostedt (Google) <rostedt@goodmis.org> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Uladzislau Rezki (Sony) <urezki@gmail.com> Cc: Vineet Gupta <vgupta@kernel.org> Cc: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
76 lines
1.8 KiB
C
76 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Erratas to be applied for Andes CPU cores
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*
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* Copyright (C) 2023 Renesas Electronics Corporation.
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*
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* Author: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
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*/
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#include <linux/memory.h>
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#include <linux/module.h>
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#include <asm/alternative.h>
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#include <asm/cacheflush.h>
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#include <asm/errata_list.h>
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#include <asm/text-patching.h>
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#include <asm/processor.h>
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#include <asm/sbi.h>
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#include <asm/vendorid_list.h>
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#include <asm/vendor_extensions.h>
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#define ANDES_AX45MP_MARCHID 0x8000000000008a45UL
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#define ANDES_AX45MP_MIMPID 0x500UL
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#define ANDES_SBI_EXT_ANDES 0x0900031E
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#define ANDES_SBI_EXT_IOCP_SW_WORKAROUND 1
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static long ax45mp_iocp_sw_workaround(void)
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{
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struct sbiret ret;
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/*
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* ANDES_SBI_EXT_IOCP_SW_WORKAROUND SBI EXT checks if the IOCP is missing and
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* cache is controllable only then CMO will be applied to the platform.
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*/
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ret = sbi_ecall(ANDES_SBI_EXT_ANDES, ANDES_SBI_EXT_IOCP_SW_WORKAROUND,
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0, 0, 0, 0, 0, 0);
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return ret.error ? 0 : ret.value;
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}
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static void errata_probe_iocp(unsigned int stage, unsigned long arch_id, unsigned long impid)
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{
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static bool done;
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if (!IS_ENABLED(CONFIG_ERRATA_ANDES_CMO))
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return;
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if (done)
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return;
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done = true;
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if (arch_id != ANDES_AX45MP_MARCHID || impid != ANDES_AX45MP_MIMPID)
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return;
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if (!ax45mp_iocp_sw_workaround())
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return;
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/* Set this just to make core cbo code happy */
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riscv_cbom_block_size = 1;
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riscv_noncoherent_supported();
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}
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void __init_or_module andes_errata_patch_func(struct alt_entry *begin, struct alt_entry *end,
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unsigned long archid, unsigned long impid,
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unsigned int stage)
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{
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BUILD_BUG_ON(ERRATA_ANDES_NUMBER >= RISCV_VENDOR_EXT_ALTERNATIVES_BASE);
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if (stage == RISCV_ALTERNATIVES_BOOT)
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errata_probe_iocp(stage, archid, impid);
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/* we have nothing to patch here ATM so just return back */
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}
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