| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Jeremy Fitzhardinge | 689 | 38.82% | 28 | 35.90% |
| Juergen Gross | 398 | 22.42% | 10 | 12.82% |
| Rusty Russell | 316 | 17.80% | 5 | 6.41% |
| Andi Kleen | 89 | 5.01% | 3 | 3.85% |
| Peter Zijlstra | 58 | 3.27% | 2 | 2.56% |
| Glauber de Oliveira Costa | 49 | 2.76% | 8 | 10.26% |
| Kirill A. Shutemov | 40 | 2.25% | 3 | 3.85% |
| Boris Ostrovsky | 33 | 1.86% | 1 | 1.28% |
| Eduardo Pereira Habkost | 30 | 1.69% | 2 | 2.56% |
| Andrew Lutomirski | 30 | 1.69% | 5 | 6.41% |
| Zachary Amsden | 15 | 0.85% | 2 | 2.56% |
| Paul Gortmaker | 7 | 0.39% | 2 | 2.56% |
| Alex Shi | 6 | 0.34% | 1 | 1.28% |
| Dan Carpenter | 4 | 0.23% | 1 | 1.28% |
| David Howells | 3 | 0.17% | 1 | 1.28% |
| Masami Hiramatsu | 3 | 0.17% | 1 | 1.28% |
| Ingo Molnar | 2 | 0.11% | 1 | 1.28% |
| H. Peter Anvin | 2 | 0.11% | 1 | 1.28% |
| Borislav Petkov | 1 | 0.06% | 1 | 1.28% |
| Total | 1775 | 78 |
/* Paravirtualization interfaces Copyright (C) 2006 Rusty Russell IBM Corporation This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 2007 - x86_64 support added by Glauber de Oliveira Costa, Red Hat Inc */ #include <linux/errno.h> #include <linux/init.h> #include <linux/export.h> #include <linux/efi.h> #include <linux/bcd.h> #include <linux/highmem.h> #include <linux/kprobes.h> #include <asm/bug.h> #include <asm/paravirt.h> #include <asm/debugreg.h> #include <asm/desc.h> #include <asm/setup.h> #include <asm/pgtable.h> #include <asm/time.h> #include <asm/pgalloc.h> #include <asm/irq.h> #include <asm/delay.h> #include <asm/fixmap.h> #include <asm/apic.h> #include <asm/tlbflush.h> #include <asm/timer.h> #include <asm/special_insns.h> #include <asm/tlb.h> /* * nop stub, which must not clobber anything *including the stack* to * avoid confusing the entry prologues. */ extern void _paravirt_nop(void); asm (".pushsection .entry.text, \"ax\"\n" ".global _paravirt_nop\n" "_paravirt_nop:\n\t" "ret\n\t" ".size _paravirt_nop, . - _paravirt_nop\n\t" ".type _paravirt_nop, @function\n\t" ".popsection"); void __init default_banner(void) { printk(KERN_INFO "Booting paravirtualized kernel on %s\n", pv_info.name); } /* Undefined instruction for dealing with missing ops pointers. */ static const unsigned char ud2a[] = { 0x0f, 0x0b }; struct branch { unsigned char opcode; u32 delta; } __attribute__((packed)); static unsigned paravirt_patch_call(void *insnbuf, const void *target, unsigned long addr, unsigned len) { struct branch *b = insnbuf; unsigned long delta = (unsigned long)target - (addr+5); if (len < 5) { #ifdef CONFIG_RETPOLINE WARN_ONCE(1, "Failing to patch indirect CALL in %ps\n", (void *)addr); #endif return len; /* call too long for patch site */ } b->opcode = 0xe8; /* call */ b->delta = delta; BUILD_BUG_ON(sizeof(*b) != 5); return 5; } #ifdef CONFIG_PARAVIRT_XXL /* identity function, which can be inlined */ u64 notrace _paravirt_ident_64(u64 x) { return x; } static unsigned paravirt_patch_jmp(void *insnbuf, const void *target, unsigned long addr, unsigned len) { struct branch *b = insnbuf; unsigned long delta = (unsigned long)target - (addr+5); if (len < 5) { #ifdef CONFIG_RETPOLINE WARN_ONCE(1, "Failing to patch indirect JMP in %ps\n", (void *)addr); #endif return len; /* call too long for patch site */ } b->opcode = 0xe9; /* jmp */ b->delta = delta; return 5; } #endif DEFINE_STATIC_KEY_TRUE(virt_spin_lock_key); void __init native_pv_lock_init(void) { if (!static_cpu_has(X86_FEATURE_HYPERVISOR)) static_branch_disable(&virt_spin_lock_key); } unsigned paravirt_patch_default(u8 type, void *insnbuf, unsigned long addr, unsigned len) { /* * Neat trick to map patch type back to the call within the * corresponding structure. */ void *opfunc = *((void **)&pv_ops + type); unsigned ret; if (opfunc == NULL) /* If there's no function, patch it with a ud2a (BUG) */ ret = paravirt_patch_insns(insnbuf, len, ud2a, ud2a+sizeof(ud2a)); else if (opfunc == _paravirt_nop) ret = 0; #ifdef CONFIG_PARAVIRT_XXL /* identity functions just return their single argument */ else if (opfunc == _paravirt_ident_64) ret = paravirt_patch_ident_64(insnbuf, len); else if (type == PARAVIRT_PATCH(cpu.iret) || type == PARAVIRT_PATCH(cpu.usergs_sysret64)) /* If operation requires a jmp, then jmp */ ret = paravirt_patch_jmp(insnbuf, opfunc, addr, len); #endif else /* Otherwise call the function. */ ret = paravirt_patch_call(insnbuf, opfunc, addr, len); return ret; } unsigned paravirt_patch_insns(void *insnbuf, unsigned len, const char *start, const char *end) { unsigned insn_len = end - start; if (insn_len > len || start == NULL) insn_len = len; else memcpy(insnbuf, start, insn_len); return insn_len; } static void native_flush_tlb(void) { __native_flush_tlb(); } /* * Global pages have to be flushed a bit differently. Not a real * performance problem because this does not happen often. */ static void native_flush_tlb_global(void) { __native_flush_tlb_global(); } static void native_flush_tlb_one_user(unsigned long addr) { __native_flush_tlb_one_user(addr); } struct static_key paravirt_steal_enabled; struct static_key paravirt_steal_rq_enabled; static u64 native_steal_clock(int cpu) { return 0; } /* These are in entry.S */ extern void native_iret(void); extern void native_usergs_sysret64(void); static struct resource reserve_ioports = { .start = 0, .end = IO_SPACE_LIMIT, .name = "paravirt-ioport", .flags = IORESOURCE_IO | IORESOURCE_BUSY, }; /* * Reserve the whole legacy IO space to prevent any legacy drivers * from wasting time probing for their hardware. This is a fairly * brute-force approach to disabling all non-virtual drivers. * * Note that this must be called very early to have any effect. */ int paravirt_disable_iospace(void) { return request_resource(&ioport_resource, &reserve_ioports); } static DEFINE_PER_CPU(enum paravirt_lazy_mode, paravirt_lazy_mode) = PARAVIRT_LAZY_NONE; static inline void enter_lazy(enum paravirt_lazy_mode mode) { BUG_ON(this_cpu_read(paravirt_lazy_mode) != PARAVIRT_LAZY_NONE); this_cpu_write(paravirt_lazy_mode, mode); } static void leave_lazy(enum paravirt_lazy_mode mode) { BUG_ON(this_cpu_read(paravirt_lazy_mode) != mode); this_cpu_write(paravirt_lazy_mode, PARAVIRT_LAZY_NONE); } void paravirt_enter_lazy_mmu(void) { enter_lazy(PARAVIRT_LAZY_MMU); } void paravirt_leave_lazy_mmu(void) { leave_lazy(PARAVIRT_LAZY_MMU); } void paravirt_flush_lazy_mmu(void) { preempt_disable(); if (paravirt_get_lazy_mode() == PARAVIRT_LAZY_MMU) { arch_leave_lazy_mmu_mode(); arch_enter_lazy_mmu_mode(); } preempt_enable(); } #ifdef CONFIG_PARAVIRT_XXL void paravirt_start_context_switch(struct task_struct *prev) { BUG_ON(preemptible()); if (this_cpu_read(paravirt_lazy_mode) == PARAVIRT_LAZY_MMU) { arch_leave_lazy_mmu_mode(); set_ti_thread_flag(task_thread_info(prev), TIF_LAZY_MMU_UPDATES); } enter_lazy(PARAVIRT_LAZY_CPU); } void paravirt_end_context_switch(struct task_struct *next) { BUG_ON(preemptible()); leave_lazy(PARAVIRT_LAZY_CPU); if (test_and_clear_ti_thread_flag(task_thread_info(next), TIF_LAZY_MMU_UPDATES)) arch_enter_lazy_mmu_mode(); } #endif enum paravirt_lazy_mode paravirt_get_lazy_mode(void) { if (in_interrupt()) return PARAVIRT_LAZY_NONE; return this_cpu_read(paravirt_lazy_mode); } struct pv_info pv_info = { .name = "bare hardware", #ifdef CONFIG_PARAVIRT_XXL .kernel_rpl = 0, .shared_kernel_pmd = 1, /* Only used when CONFIG_X86_PAE is set */ #ifdef CONFIG_X86_64 .extra_user_64bit_cs = __USER_CS, #endif #endif }; /* 64-bit pagetable entries */ #define PTE_IDENT __PV_IS_CALLEE_SAVE(_paravirt_ident_64) struct paravirt_patch_template pv_ops = { /* Init ops. */ .init.patch = native_patch, /* Time ops. */ .time.sched_clock = native_sched_clock, .time.steal_clock = native_steal_clock, /* Cpu ops. */ .cpu.io_delay = native_io_delay, #ifdef CONFIG_PARAVIRT_XXL .cpu.cpuid = native_cpuid, .cpu.get_debugreg = native_get_debugreg, .cpu.set_debugreg = native_set_debugreg, .cpu.read_cr0 = native_read_cr0, .cpu.write_cr0 = native_write_cr0, .cpu.write_cr4 = native_write_cr4, #ifdef CONFIG_X86_64 .cpu.read_cr8 = native_read_cr8, .cpu.write_cr8 = native_write_cr8, #endif .cpu.wbinvd = native_wbinvd, .cpu.read_msr = native_read_msr, .cpu.write_msr = native_write_msr, .cpu.read_msr_safe = native_read_msr_safe, .cpu.write_msr_safe = native_write_msr_safe, .cpu.read_pmc = native_read_pmc, .cpu.load_tr_desc = native_load_tr_desc, .cpu.set_ldt = native_set_ldt, .cpu.load_gdt = native_load_gdt, .cpu.load_idt = native_load_idt, .cpu.store_tr = native_store_tr, .cpu.load_tls = native_load_tls, #ifdef CONFIG_X86_64 .cpu.load_gs_index = native_load_gs_index, #endif .cpu.write_ldt_entry = native_write_ldt_entry, .cpu.write_gdt_entry = native_write_gdt_entry, .cpu.write_idt_entry = native_write_idt_entry, .cpu.alloc_ldt = paravirt_nop, .cpu.free_ldt = paravirt_nop, .cpu.load_sp0 = native_load_sp0, #ifdef CONFIG_X86_64 .cpu.usergs_sysret64 = native_usergs_sysret64, #endif .cpu.iret = native_iret, .cpu.swapgs = native_swapgs, .cpu.set_iopl_mask = native_set_iopl_mask, .cpu.start_context_switch = paravirt_nop, .cpu.end_context_switch = paravirt_nop, /* Irq ops. */ .irq.save_fl = __PV_IS_CALLEE_SAVE(native_save_fl), .irq.restore_fl = __PV_IS_CALLEE_SAVE(native_restore_fl), .irq.irq_disable = __PV_IS_CALLEE_SAVE(native_irq_disable), .irq.irq_enable = __PV_IS_CALLEE_SAVE(native_irq_enable), .irq.safe_halt = native_safe_halt, .irq.halt = native_halt, #endif /* CONFIG_PARAVIRT_XXL */ /* Mmu ops. */ .mmu.flush_tlb_user = native_flush_tlb, .mmu.flush_tlb_kernel = native_flush_tlb_global, .mmu.flush_tlb_one_user = native_flush_tlb_one_user, .mmu.flush_tlb_others = native_flush_tlb_others, .mmu.tlb_remove_table = (void (*)(struct mmu_gather *, void *))tlb_remove_page, .mmu.exit_mmap = paravirt_nop, #ifdef CONFIG_PARAVIRT_XXL .mmu.read_cr2 = native_read_cr2, .mmu.write_cr2 = native_write_cr2, .mmu.read_cr3 = __native_read_cr3, .mmu.write_cr3 = native_write_cr3, .mmu.pgd_alloc = __paravirt_pgd_alloc, .mmu.pgd_free = paravirt_nop, .mmu.alloc_pte = paravirt_nop, .mmu.alloc_pmd = paravirt_nop, .mmu.alloc_pud = paravirt_nop, .mmu.alloc_p4d = paravirt_nop, .mmu.release_pte = paravirt_nop, .mmu.release_pmd = paravirt_nop, .mmu.release_pud = paravirt_nop, .mmu.release_p4d = paravirt_nop, .mmu.set_pte = native_set_pte, .mmu.set_pte_at = native_set_pte_at, .mmu.set_pmd = native_set_pmd, .mmu.ptep_modify_prot_start = __ptep_modify_prot_start, .mmu.ptep_modify_prot_commit = __ptep_modify_prot_commit, #if CONFIG_PGTABLE_LEVELS >= 3 #ifdef CONFIG_X86_PAE .mmu.set_pte_atomic = native_set_pte_atomic, .mmu.pte_clear = native_pte_clear, .mmu.pmd_clear = native_pmd_clear, #endif .mmu.set_pud = native_set_pud, .mmu.pmd_val = PTE_IDENT, .mmu.make_pmd = PTE_IDENT, #if CONFIG_PGTABLE_LEVELS >= 4 .mmu.pud_val = PTE_IDENT, .mmu.make_pud = PTE_IDENT, .mmu.set_p4d = native_set_p4d, #if CONFIG_PGTABLE_LEVELS >= 5 .mmu.p4d_val = PTE_IDENT, .mmu.make_p4d = PTE_IDENT, .mmu.set_pgd = native_set_pgd, #endif /* CONFIG_PGTABLE_LEVELS >= 5 */ #endif /* CONFIG_PGTABLE_LEVELS >= 4 */ #endif /* CONFIG_PGTABLE_LEVELS >= 3 */ .mmu.pte_val = PTE_IDENT, .mmu.pgd_val = PTE_IDENT, .mmu.make_pte = PTE_IDENT, .mmu.make_pgd = PTE_IDENT, .mmu.dup_mmap = paravirt_nop, .mmu.activate_mm = paravirt_nop, .mmu.lazy_mode = { .enter = paravirt_nop, .leave = paravirt_nop, .flush = paravirt_nop, }, .mmu.set_fixmap = native_set_fixmap, #endif /* CONFIG_PARAVIRT_XXL */ #if defined(CONFIG_PARAVIRT_SPINLOCKS) /* Lock ops. */ #ifdef CONFIG_SMP .lock.queued_spin_lock_slowpath = native_queued_spin_lock_slowpath, .lock.queued_spin_unlock = PV_CALLEE_SAVE(__native_queued_spin_unlock), .lock.wait = paravirt_nop, .lock.kick = paravirt_nop, .lock.vcpu_is_preempted = PV_CALLEE_SAVE(__native_vcpu_is_preempted), #endif /* SMP */ #endif }; #ifdef CONFIG_PARAVIRT_XXL /* At this point, native_get/set_debugreg has real function entries */ NOKPROBE_SYMBOL(native_get_debugreg); NOKPROBE_SYMBOL(native_set_debugreg); NOKPROBE_SYMBOL(native_load_idt); #endif EXPORT_SYMBOL(pv_ops); EXPORT_SYMBOL_GPL(pv_info);
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with Cregit http://github.com/cregit/cregit
Version 2.0-RC1