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ff2c8252bf
smp_ops providers do not modify their ops structures, so they should be made const for robustness. Since currently the MIPS kernel is not mapped with memory protection, this does not in itself provide any security benefit, but it still makes sense to make this change. There are also slight code size efficincies from the structure being made read-only, saving 128 bytes of kernel text on a pistachio_defconfig. Before: text data bss dec hex filename 7187239 1772752 470224 9430215 8fe4c7 vmlinux After: text data bss dec hex filename 7187111 1772752 470224 9430087 8fe447 vmlinux Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Marcin Nowakowski <marcin.nowakowski@imgtec.com> Cc: Bart Van Assche <bart.vanassche@sandisk.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Huacai Chen <chenhc@lemote.com> Cc: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: Kevin Cernekee <cernekee@gmail.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Doug Ledford <dledford@redhat.com> Cc: James Hogan <james.hogan@imgtec.com> Cc: Joe Perches <joe@perches.com> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Paul Burton <paul.burton@imgtec.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Steven J. Hill <steven.hill@cavium.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/16784/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
68 lines
1.4 KiB
C
68 lines
1.4 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2013 Cavium, Inc.
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*/
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#include <linux/kernel.h>
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#include <linux/kvm_para.h>
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#include <asm/reboot.h>
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#include <asm/bootinfo.h>
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#include <asm/smp-ops.h>
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#include <asm/time.h>
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extern const struct plat_smp_ops paravirt_smp_ops;
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const char *get_system_type(void)
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{
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return "MIPS Para-Virtualized Guest";
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}
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void __init plat_time_init(void)
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{
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mips_hpt_frequency = kvm_hypercall0(KVM_HC_MIPS_GET_CLOCK_FREQ);
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preset_lpj = mips_hpt_frequency / (2 * HZ);
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}
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static void pv_machine_halt(void)
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{
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kvm_hypercall0(KVM_HC_MIPS_EXIT_VM);
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}
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/*
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* Early entry point for arch setup
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*/
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void __init prom_init(void)
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{
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int i;
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int argc = fw_arg0;
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char **argv = (char **)fw_arg1;
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#ifdef CONFIG_32BIT
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set_io_port_base(KSEG1ADDR(0x1e000000));
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#else /* CONFIG_64BIT */
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set_io_port_base(PHYS_TO_XKSEG_UNCACHED(0x1e000000));
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#endif
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for (i = 0; i < argc; i++) {
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strlcat(arcs_cmdline, argv[i], COMMAND_LINE_SIZE);
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if (i < argc - 1)
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strlcat(arcs_cmdline, " ", COMMAND_LINE_SIZE);
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}
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_machine_halt = pv_machine_halt;
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register_smp_ops(¶virt_smp_ops);
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}
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void __init plat_mem_setup(void)
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{
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/* Do nothing, the "mem=???" parser handles our memory. */
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}
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void __init prom_free_prom_memory(void)
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{
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}
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