1fd534e9bSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-or-later 2b1df07bdSGlauber de Oliveira Costa /* Paravirtualization interfaces 3b1df07bdSGlauber de Oliveira Costa Copyright (C) 2006 Rusty Russell IBM Corporation 4b1df07bdSGlauber de Oliveira Costa 5b1df07bdSGlauber de Oliveira Costa 6b1df07bdSGlauber de Oliveira Costa 2007 - x86_64 support added by Glauber de Oliveira Costa, Red Hat Inc 7b1df07bdSGlauber de Oliveira Costa */ 8b1df07bdSGlauber de Oliveira Costa 9b1df07bdSGlauber de Oliveira Costa #include <linux/errno.h> 10186f4360SPaul Gortmaker #include <linux/init.h> 11186f4360SPaul Gortmaker #include <linux/export.h> 12b1df07bdSGlauber de Oliveira Costa #include <linux/efi.h> 13b1df07bdSGlauber de Oliveira Costa #include <linux/bcd.h> 14b1df07bdSGlauber de Oliveira Costa #include <linux/highmem.h> 15376e2424SMasami Hiramatsu #include <linux/kprobes.h> 1665fddcfcSMike Rapoport #include <linux/pgtable.h> 17b1df07bdSGlauber de Oliveira Costa 18b1df07bdSGlauber de Oliveira Costa #include <asm/bug.h> 19b1df07bdSGlauber de Oliveira Costa #include <asm/paravirt.h> 2050af5eadSPaul Gortmaker #include <asm/debugreg.h> 21b1df07bdSGlauber de Oliveira Costa #include <asm/desc.h> 22b1df07bdSGlauber de Oliveira Costa #include <asm/setup.h> 23b1df07bdSGlauber de Oliveira Costa #include <asm/time.h> 24eba0045fSJeremy Fitzhardinge #include <asm/pgalloc.h> 25b1df07bdSGlauber de Oliveira Costa #include <asm/irq.h> 26b1df07bdSGlauber de Oliveira Costa #include <asm/delay.h> 27b1df07bdSGlauber de Oliveira Costa #include <asm/fixmap.h> 28b1df07bdSGlauber de Oliveira Costa #include <asm/apic.h> 29b1df07bdSGlauber de Oliveira Costa #include <asm/tlbflush.h> 30b1df07bdSGlauber de Oliveira Costa #include <asm/timer.h> 31f05e798aSDavid Howells #include <asm/special_insns.h> 3248a8b97cSPeter Zijlstra #include <asm/tlb.h> 3399bcd4a6SJuergen Gross #include <asm/io_bitmap.h> 34b1df07bdSGlauber de Oliveira Costa 35fc57a7c6SAndy Lutomirski /* 36fc57a7c6SAndy Lutomirski * nop stub, which must not clobber anything *including the stack* to 37fc57a7c6SAndy Lutomirski * avoid confusing the entry prologues. 38fc57a7c6SAndy Lutomirski */ 39fc57a7c6SAndy Lutomirski extern void _paravirt_nop(void); 40fc57a7c6SAndy Lutomirski asm (".pushsection .entry.text, \"ax\"\n" 41fc57a7c6SAndy Lutomirski ".global _paravirt_nop\n" 42fc57a7c6SAndy Lutomirski "_paravirt_nop:\n\t" 43fc57a7c6SAndy Lutomirski "ret\n\t" 44fc57a7c6SAndy Lutomirski ".size _paravirt_nop, . - _paravirt_nop\n\t" 45fc57a7c6SAndy Lutomirski ".type _paravirt_nop, @function\n\t" 46fc57a7c6SAndy Lutomirski ".popsection"); 47b1df07bdSGlauber de Oliveira Costa 486f30c1acSThomas Gleixner void __init default_banner(void) 49b1df07bdSGlauber de Oliveira Costa { 50b1df07bdSGlauber de Oliveira Costa printk(KERN_INFO "Booting paravirtualized kernel on %s\n", 51b1df07bdSGlauber de Oliveira Costa pv_info.name); 52b1df07bdSGlauber de Oliveira Costa } 53b1df07bdSGlauber de Oliveira Costa 54b1df07bdSGlauber de Oliveira Costa /* Undefined instruction for dealing with missing ops pointers. */ 55b1df07bdSGlauber de Oliveira Costa static const unsigned char ud2a[] = { 0x0f, 0x0b }; 56b1df07bdSGlauber de Oliveira Costa 57b1df07bdSGlauber de Oliveira Costa struct branch { 58b1df07bdSGlauber de Oliveira Costa unsigned char opcode; 59b1df07bdSGlauber de Oliveira Costa u32 delta; 60b1df07bdSGlauber de Oliveira Costa } __attribute__((packed)); 61b1df07bdSGlauber de Oliveira Costa 621fc654cfSIngo Molnar static unsigned paravirt_patch_call(void *insn_buff, const void *target, 63abc745f8SJuergen Gross unsigned long addr, unsigned len) 64b1df07bdSGlauber de Oliveira Costa { 6511e86dc7SIngo Molnar const int call_len = 5; 661fc654cfSIngo Molnar struct branch *b = insn_buff; 6711e86dc7SIngo Molnar unsigned long delta = (unsigned long)target - (addr+call_len); 68b1df07bdSGlauber de Oliveira Costa 6911e86dc7SIngo Molnar if (len < call_len) { 7011e86dc7SIngo Molnar pr_warn("paravirt: Failed to patch indirect CALL at %ps\n", (void *)addr); 7111e86dc7SIngo Molnar /* Kernel might not be viable if patching fails, bail out: */ 7211e86dc7SIngo Molnar BUG_ON(1); 735800dc5cSPeter Zijlstra } 74b1df07bdSGlauber de Oliveira Costa 75b1df07bdSGlauber de Oliveira Costa b->opcode = 0xe8; /* call */ 76b1df07bdSGlauber de Oliveira Costa b->delta = delta; 7711e86dc7SIngo Molnar BUILD_BUG_ON(sizeof(*b) != call_len); 78b1df07bdSGlauber de Oliveira Costa 7911e86dc7SIngo Molnar return call_len; 80b1df07bdSGlauber de Oliveira Costa } 81b1df07bdSGlauber de Oliveira Costa 829bad5658SJuergen Gross #ifdef CONFIG_PARAVIRT_XXL 837847c7beSJuergen Gross /* identity function, which can be inlined */ 847847c7beSJuergen Gross u64 notrace _paravirt_ident_64(u64 x) 857847c7beSJuergen Gross { 867847c7beSJuergen Gross return x; 877847c7beSJuergen Gross } 887847c7beSJuergen Gross 891fc654cfSIngo Molnar static unsigned paravirt_patch_jmp(void *insn_buff, const void *target, 90b1df07bdSGlauber de Oliveira Costa unsigned long addr, unsigned len) 91b1df07bdSGlauber de Oliveira Costa { 921fc654cfSIngo Molnar struct branch *b = insn_buff; 93b1df07bdSGlauber de Oliveira Costa unsigned long delta = (unsigned long)target - (addr+5); 94b1df07bdSGlauber de Oliveira Costa 955800dc5cSPeter Zijlstra if (len < 5) { 965800dc5cSPeter Zijlstra #ifdef CONFIG_RETPOLINE 97571d0563SDan Carpenter WARN_ONCE(1, "Failing to patch indirect JMP in %ps\n", (void *)addr); 985800dc5cSPeter Zijlstra #endif 99b1df07bdSGlauber de Oliveira Costa return len; /* call too long for patch site */ 1005800dc5cSPeter Zijlstra } 101b1df07bdSGlauber de Oliveira Costa 102b1df07bdSGlauber de Oliveira Costa b->opcode = 0xe9; /* jmp */ 103b1df07bdSGlauber de Oliveira Costa b->delta = delta; 104b1df07bdSGlauber de Oliveira Costa 105b1df07bdSGlauber de Oliveira Costa return 5; 106b1df07bdSGlauber de Oliveira Costa } 1079bad5658SJuergen Gross #endif 108b1df07bdSGlauber de Oliveira Costa 1099043442bSJuergen Gross DEFINE_STATIC_KEY_TRUE(virt_spin_lock_key); 1109043442bSJuergen Gross 1119043442bSJuergen Gross void __init native_pv_lock_init(void) 1129043442bSJuergen Gross { 11367e87d43SBorislav Petkov if (!boot_cpu_has(X86_FEATURE_HYPERVISOR)) 1149043442bSJuergen Gross static_branch_disable(&virt_spin_lock_key); 1159043442bSJuergen Gross } 1169043442bSJuergen Gross 1171fc654cfSIngo Molnar unsigned paravirt_patch_default(u8 type, void *insn_buff, 1185c83511bSJuergen Gross unsigned long addr, unsigned len) 1195c83511bSJuergen Gross { 1209043442bSJuergen Gross /* 1219043442bSJuergen Gross * Neat trick to map patch type back to the call within the 1229043442bSJuergen Gross * corresponding structure. 1239043442bSJuergen Gross */ 1245c83511bSJuergen Gross void *opfunc = *((void **)&pv_ops + type); 125b1df07bdSGlauber de Oliveira Costa unsigned ret; 126b1df07bdSGlauber de Oliveira Costa 127b1df07bdSGlauber de Oliveira Costa if (opfunc == NULL) 128b1df07bdSGlauber de Oliveira Costa /* If there's no function, patch it with a ud2a (BUG) */ 1291fc654cfSIngo Molnar ret = paravirt_patch_insns(insn_buff, len, ud2a, ud2a+sizeof(ud2a)); 13041edafdbSJeremy Fitzhardinge else if (opfunc == _paravirt_nop) 13179f1d836SBorislav Petkov ret = 0; 13241edafdbSJeremy Fitzhardinge 1337847c7beSJuergen Gross #ifdef CONFIG_PARAVIRT_XXL 13441edafdbSJeremy Fitzhardinge /* identity functions just return their single argument */ 13541edafdbSJeremy Fitzhardinge else if (opfunc == _paravirt_ident_64) 1361fc654cfSIngo Molnar ret = paravirt_patch_ident_64(insn_buff, len); 13741edafdbSJeremy Fitzhardinge 1385c83511bSJuergen Gross else if (type == PARAVIRT_PATCH(cpu.iret) || 1395c83511bSJuergen Gross type == PARAVIRT_PATCH(cpu.usergs_sysret64)) 140b1df07bdSGlauber de Oliveira Costa /* If operation requires a jmp, then jmp */ 1411fc654cfSIngo Molnar ret = paravirt_patch_jmp(insn_buff, opfunc, addr, len); 1429bad5658SJuergen Gross #endif 143b1df07bdSGlauber de Oliveira Costa else 144abc745f8SJuergen Gross /* Otherwise call the function. */ 1451fc654cfSIngo Molnar ret = paravirt_patch_call(insn_buff, opfunc, addr, len); 146b1df07bdSGlauber de Oliveira Costa 147b1df07bdSGlauber de Oliveira Costa return ret; 148b1df07bdSGlauber de Oliveira Costa } 149b1df07bdSGlauber de Oliveira Costa 1501fc654cfSIngo Molnar unsigned paravirt_patch_insns(void *insn_buff, unsigned len, 151b1df07bdSGlauber de Oliveira Costa const char *start, const char *end) 152b1df07bdSGlauber de Oliveira Costa { 153b1df07bdSGlauber de Oliveira Costa unsigned insn_len = end - start; 154b1df07bdSGlauber de Oliveira Costa 1552777cae2SIngo Molnar /* Alternative instruction is too large for the patch site and we cannot continue: */ 1562777cae2SIngo Molnar BUG_ON(insn_len > len || start == NULL); 1572777cae2SIngo Molnar 1581fc654cfSIngo Molnar memcpy(insn_buff, start, insn_len); 159b1df07bdSGlauber de Oliveira Costa 160b1df07bdSGlauber de Oliveira Costa return insn_len; 161b1df07bdSGlauber de Oliveira Costa } 162b1df07bdSGlauber de Oliveira Costa 163c5905afbSIngo Molnar struct static_key paravirt_steal_enabled; 164c5905afbSIngo Molnar struct static_key paravirt_steal_rq_enabled; 1653c404b57SGlauber Costa 1663c404b57SGlauber Costa static u64 native_steal_clock(int cpu) 1673c404b57SGlauber Costa { 1683c404b57SGlauber Costa return 0; 1693c404b57SGlauber Costa } 1703c404b57SGlauber Costa 171b1df07bdSGlauber de Oliveira Costa /* These are in entry.S */ 172b1df07bdSGlauber de Oliveira Costa extern void native_iret(void); 1732be29982SJeremy Fitzhardinge extern void native_usergs_sysret64(void); 174b1df07bdSGlauber de Oliveira Costa 175b1df07bdSGlauber de Oliveira Costa static struct resource reserve_ioports = { 176b1df07bdSGlauber de Oliveira Costa .start = 0, 177b1df07bdSGlauber de Oliveira Costa .end = IO_SPACE_LIMIT, 178b1df07bdSGlauber de Oliveira Costa .name = "paravirt-ioport", 179b1df07bdSGlauber de Oliveira Costa .flags = IORESOURCE_IO | IORESOURCE_BUSY, 180b1df07bdSGlauber de Oliveira Costa }; 181b1df07bdSGlauber de Oliveira Costa 182b1df07bdSGlauber de Oliveira Costa /* 183b1df07bdSGlauber de Oliveira Costa * Reserve the whole legacy IO space to prevent any legacy drivers 184b1df07bdSGlauber de Oliveira Costa * from wasting time probing for their hardware. This is a fairly 185b1df07bdSGlauber de Oliveira Costa * brute-force approach to disabling all non-virtual drivers. 186b1df07bdSGlauber de Oliveira Costa * 187b1df07bdSGlauber de Oliveira Costa * Note that this must be called very early to have any effect. 188b1df07bdSGlauber de Oliveira Costa */ 189b1df07bdSGlauber de Oliveira Costa int paravirt_disable_iospace(void) 190b1df07bdSGlauber de Oliveira Costa { 191f7743fe6SJeremy Fitzhardinge return request_resource(&ioport_resource, &reserve_ioports); 192b1df07bdSGlauber de Oliveira Costa } 193b1df07bdSGlauber de Oliveira Costa 194b1df07bdSGlauber de Oliveira Costa static DEFINE_PER_CPU(enum paravirt_lazy_mode, paravirt_lazy_mode) = PARAVIRT_LAZY_NONE; 195b1df07bdSGlauber de Oliveira Costa 196b1df07bdSGlauber de Oliveira Costa static inline void enter_lazy(enum paravirt_lazy_mode mode) 197b1df07bdSGlauber de Oliveira Costa { 198c6ae41e7SAlex Shi BUG_ON(this_cpu_read(paravirt_lazy_mode) != PARAVIRT_LAZY_NONE); 199b1df07bdSGlauber de Oliveira Costa 200c6ae41e7SAlex Shi this_cpu_write(paravirt_lazy_mode, mode); 201b1df07bdSGlauber de Oliveira Costa } 202b1df07bdSGlauber de Oliveira Costa 203b407fc57SJeremy Fitzhardinge static void leave_lazy(enum paravirt_lazy_mode mode) 204b1df07bdSGlauber de Oliveira Costa { 205c6ae41e7SAlex Shi BUG_ON(this_cpu_read(paravirt_lazy_mode) != mode); 206b1df07bdSGlauber de Oliveira Costa 207c6ae41e7SAlex Shi this_cpu_write(paravirt_lazy_mode, PARAVIRT_LAZY_NONE); 208b1df07bdSGlauber de Oliveira Costa } 209b1df07bdSGlauber de Oliveira Costa 210b1df07bdSGlauber de Oliveira Costa void paravirt_enter_lazy_mmu(void) 211b1df07bdSGlauber de Oliveira Costa { 212b1df07bdSGlauber de Oliveira Costa enter_lazy(PARAVIRT_LAZY_MMU); 213b1df07bdSGlauber de Oliveira Costa } 214b1df07bdSGlauber de Oliveira Costa 215b1df07bdSGlauber de Oliveira Costa void paravirt_leave_lazy_mmu(void) 216b1df07bdSGlauber de Oliveira Costa { 217b407fc57SJeremy Fitzhardinge leave_lazy(PARAVIRT_LAZY_MMU); 218b1df07bdSGlauber de Oliveira Costa } 219b1df07bdSGlauber de Oliveira Costa 220511ba86eSBoris Ostrovsky void paravirt_flush_lazy_mmu(void) 221511ba86eSBoris Ostrovsky { 222511ba86eSBoris Ostrovsky preempt_disable(); 223511ba86eSBoris Ostrovsky 224511ba86eSBoris Ostrovsky if (paravirt_get_lazy_mode() == PARAVIRT_LAZY_MMU) { 225511ba86eSBoris Ostrovsky arch_leave_lazy_mmu_mode(); 226511ba86eSBoris Ostrovsky arch_enter_lazy_mmu_mode(); 227511ba86eSBoris Ostrovsky } 228511ba86eSBoris Ostrovsky 229511ba86eSBoris Ostrovsky preempt_enable(); 230511ba86eSBoris Ostrovsky } 231511ba86eSBoris Ostrovsky 2329bad5658SJuergen Gross #ifdef CONFIG_PARAVIRT_XXL 233224101edSJeremy Fitzhardinge void paravirt_start_context_switch(struct task_struct *prev) 234b1df07bdSGlauber de Oliveira Costa { 2352829b449SJeremy Fitzhardinge BUG_ON(preemptible()); 2362829b449SJeremy Fitzhardinge 237c6ae41e7SAlex Shi if (this_cpu_read(paravirt_lazy_mode) == PARAVIRT_LAZY_MMU) { 238b407fc57SJeremy Fitzhardinge arch_leave_lazy_mmu_mode(); 239224101edSJeremy Fitzhardinge set_ti_thread_flag(task_thread_info(prev), TIF_LAZY_MMU_UPDATES); 240b407fc57SJeremy Fitzhardinge } 241b1df07bdSGlauber de Oliveira Costa enter_lazy(PARAVIRT_LAZY_CPU); 242b1df07bdSGlauber de Oliveira Costa } 243b1df07bdSGlauber de Oliveira Costa 244224101edSJeremy Fitzhardinge void paravirt_end_context_switch(struct task_struct *next) 245b1df07bdSGlauber de Oliveira Costa { 2462829b449SJeremy Fitzhardinge BUG_ON(preemptible()); 2472829b449SJeremy Fitzhardinge 248b407fc57SJeremy Fitzhardinge leave_lazy(PARAVIRT_LAZY_CPU); 249b407fc57SJeremy Fitzhardinge 250224101edSJeremy Fitzhardinge if (test_and_clear_ti_thread_flag(task_thread_info(next), TIF_LAZY_MMU_UPDATES)) 251b407fc57SJeremy Fitzhardinge arch_enter_lazy_mmu_mode(); 252b1df07bdSGlauber de Oliveira Costa } 2539bad5658SJuergen Gross #endif 254b1df07bdSGlauber de Oliveira Costa 255b1df07bdSGlauber de Oliveira Costa enum paravirt_lazy_mode paravirt_get_lazy_mode(void) 256b1df07bdSGlauber de Oliveira Costa { 257b8bcfe99SJeremy Fitzhardinge if (in_interrupt()) 258b8bcfe99SJeremy Fitzhardinge return PARAVIRT_LAZY_NONE; 259b8bcfe99SJeremy Fitzhardinge 260c6ae41e7SAlex Shi return this_cpu_read(paravirt_lazy_mode); 261b1df07bdSGlauber de Oliveira Costa } 262b1df07bdSGlauber de Oliveira Costa 263b1df07bdSGlauber de Oliveira Costa struct pv_info pv_info = { 264b1df07bdSGlauber de Oliveira Costa .name = "bare hardware", 26540181646SJuergen Gross #ifdef CONFIG_PARAVIRT_XXL 266b1df07bdSGlauber de Oliveira Costa .kernel_rpl = 0, 267b1df07bdSGlauber de Oliveira Costa .shared_kernel_pmd = 1, /* Only used when CONFIG_X86_PAE is set */ 268318f5a2aSAndy Lutomirski 269318f5a2aSAndy Lutomirski #ifdef CONFIG_X86_64 270318f5a2aSAndy Lutomirski .extra_user_64bit_cs = __USER_CS, 271318f5a2aSAndy Lutomirski #endif 27288b4755fSGlauber de Oliveira Costa #endif 273b1df07bdSGlauber de Oliveira Costa }; 274b1df07bdSGlauber de Oliveira Costa 27541edafdbSJeremy Fitzhardinge /* 64-bit pagetable entries */ 276da5de7c2SJeremy Fitzhardinge #define PTE_IDENT __PV_IS_CALLEE_SAVE(_paravirt_ident_64) 27741edafdbSJeremy Fitzhardinge 2785c83511bSJuergen Gross struct paravirt_patch_template pv_ops = { 2795c83511bSJuergen Gross /* Init ops. */ 2805c83511bSJuergen Gross .init.patch = native_patch, 281b1df07bdSGlauber de Oliveira Costa 2825c83511bSJuergen Gross /* Time ops. */ 2835c83511bSJuergen Gross .time.sched_clock = native_sched_clock, 2845c83511bSJuergen Gross .time.steal_clock = native_steal_clock, 285b1df07bdSGlauber de Oliveira Costa 2865c83511bSJuergen Gross /* Cpu ops. */ 2879bad5658SJuergen Gross .cpu.io_delay = native_io_delay, 288b1df07bdSGlauber de Oliveira Costa 2899bad5658SJuergen Gross #ifdef CONFIG_PARAVIRT_XXL 2905c83511bSJuergen Gross .cpu.cpuid = native_cpuid, 2915c83511bSJuergen Gross .cpu.get_debugreg = native_get_debugreg, 2925c83511bSJuergen Gross .cpu.set_debugreg = native_set_debugreg, 2935c83511bSJuergen Gross .cpu.read_cr0 = native_read_cr0, 2945c83511bSJuergen Gross .cpu.write_cr0 = native_write_cr0, 2955c83511bSJuergen Gross .cpu.write_cr4 = native_write_cr4, 2965c83511bSJuergen Gross .cpu.wbinvd = native_wbinvd, 2975c83511bSJuergen Gross .cpu.read_msr = native_read_msr, 2985c83511bSJuergen Gross .cpu.write_msr = native_write_msr, 2995c83511bSJuergen Gross .cpu.read_msr_safe = native_read_msr_safe, 3005c83511bSJuergen Gross .cpu.write_msr_safe = native_write_msr_safe, 3015c83511bSJuergen Gross .cpu.read_pmc = native_read_pmc, 3025c83511bSJuergen Gross .cpu.load_tr_desc = native_load_tr_desc, 3035c83511bSJuergen Gross .cpu.set_ldt = native_set_ldt, 3045c83511bSJuergen Gross .cpu.load_gdt = native_load_gdt, 3055c83511bSJuergen Gross .cpu.load_idt = native_load_idt, 3065c83511bSJuergen Gross .cpu.store_tr = native_store_tr, 3075c83511bSJuergen Gross .cpu.load_tls = native_load_tls, 3085c83511bSJuergen Gross #ifdef CONFIG_X86_64 3095c83511bSJuergen Gross .cpu.load_gs_index = native_load_gs_index, 3105c83511bSJuergen Gross #endif 3115c83511bSJuergen Gross .cpu.write_ldt_entry = native_write_ldt_entry, 3125c83511bSJuergen Gross .cpu.write_gdt_entry = native_write_gdt_entry, 3135c83511bSJuergen Gross .cpu.write_idt_entry = native_write_idt_entry, 314eba0045fSJeremy Fitzhardinge 3155c83511bSJuergen Gross .cpu.alloc_ldt = paravirt_nop, 3165c83511bSJuergen Gross .cpu.free_ldt = paravirt_nop, 317b1df07bdSGlauber de Oliveira Costa 3185c83511bSJuergen Gross .cpu.load_sp0 = native_load_sp0, 319b1df07bdSGlauber de Oliveira Costa 3205c83511bSJuergen Gross #ifdef CONFIG_X86_64 3215c83511bSJuergen Gross .cpu.usergs_sysret64 = native_usergs_sysret64, 3225c83511bSJuergen Gross #endif 3235c83511bSJuergen Gross .cpu.iret = native_iret, 3245c83511bSJuergen Gross .cpu.swapgs = native_swapgs, 325b1df07bdSGlauber de Oliveira Costa 32699bcd4a6SJuergen Gross #ifdef CONFIG_X86_IOPL_IOPERM 327*cadfad87SAndy Lutomirski .cpu.invalidate_io_bitmap = native_tss_invalidate_io_bitmap, 32899bcd4a6SJuergen Gross .cpu.update_io_bitmap = native_tss_update_io_bitmap, 32999bcd4a6SJuergen Gross #endif 33099bcd4a6SJuergen Gross 3315c83511bSJuergen Gross .cpu.start_context_switch = paravirt_nop, 3325c83511bSJuergen Gross .cpu.end_context_switch = paravirt_nop, 3335c83511bSJuergen Gross 3345c83511bSJuergen Gross /* Irq ops. */ 3355c83511bSJuergen Gross .irq.save_fl = __PV_IS_CALLEE_SAVE(native_save_fl), 3365c83511bSJuergen Gross .irq.restore_fl = __PV_IS_CALLEE_SAVE(native_restore_fl), 3375c83511bSJuergen Gross .irq.irq_disable = __PV_IS_CALLEE_SAVE(native_irq_disable), 3385c83511bSJuergen Gross .irq.irq_enable = __PV_IS_CALLEE_SAVE(native_irq_enable), 3395c83511bSJuergen Gross .irq.safe_halt = native_safe_halt, 3405c83511bSJuergen Gross .irq.halt = native_halt, 3416da63eb2SJuergen Gross #endif /* CONFIG_PARAVIRT_XXL */ 3425c83511bSJuergen Gross 3435c83511bSJuergen Gross /* Mmu ops. */ 3442faf153bSThomas Gleixner .mmu.flush_tlb_user = native_flush_tlb_local, 3455c83511bSJuergen Gross .mmu.flush_tlb_kernel = native_flush_tlb_global, 3465c83511bSJuergen Gross .mmu.flush_tlb_one_user = native_flush_tlb_one_user, 3475c83511bSJuergen Gross .mmu.flush_tlb_others = native_flush_tlb_others, 3485c83511bSJuergen Gross .mmu.tlb_remove_table = 3495c83511bSJuergen Gross (void (*)(struct mmu_gather *, void *))tlb_remove_page, 3505c83511bSJuergen Gross 351fdc0269eSJuergen Gross .mmu.exit_mmap = paravirt_nop, 352fdc0269eSJuergen Gross 353fdc0269eSJuergen Gross #ifdef CONFIG_PARAVIRT_XXL 35455aedddbSPeter Zijlstra .mmu.read_cr2 = __PV_IS_CALLEE_SAVE(native_read_cr2), 355fdc0269eSJuergen Gross .mmu.write_cr2 = native_write_cr2, 356fdc0269eSJuergen Gross .mmu.read_cr3 = __native_read_cr3, 357fdc0269eSJuergen Gross .mmu.write_cr3 = native_write_cr3, 358fdc0269eSJuergen Gross 3595c83511bSJuergen Gross .mmu.pgd_alloc = __paravirt_pgd_alloc, 3605c83511bSJuergen Gross .mmu.pgd_free = paravirt_nop, 3615c83511bSJuergen Gross 3625c83511bSJuergen Gross .mmu.alloc_pte = paravirt_nop, 3635c83511bSJuergen Gross .mmu.alloc_pmd = paravirt_nop, 3645c83511bSJuergen Gross .mmu.alloc_pud = paravirt_nop, 3655c83511bSJuergen Gross .mmu.alloc_p4d = paravirt_nop, 3665c83511bSJuergen Gross .mmu.release_pte = paravirt_nop, 3675c83511bSJuergen Gross .mmu.release_pmd = paravirt_nop, 3685c83511bSJuergen Gross .mmu.release_pud = paravirt_nop, 3695c83511bSJuergen Gross .mmu.release_p4d = paravirt_nop, 3705c83511bSJuergen Gross 3715c83511bSJuergen Gross .mmu.set_pte = native_set_pte, 3725c83511bSJuergen Gross .mmu.set_pte_at = native_set_pte_at, 3735c83511bSJuergen Gross .mmu.set_pmd = native_set_pmd, 3745c83511bSJuergen Gross 3755c83511bSJuergen Gross .mmu.ptep_modify_prot_start = __ptep_modify_prot_start, 3765c83511bSJuergen Gross .mmu.ptep_modify_prot_commit = __ptep_modify_prot_commit, 37708b882c6SJeremy Fitzhardinge 37898233368SKirill A. Shutemov #if CONFIG_PGTABLE_LEVELS >= 3 379b1df07bdSGlauber de Oliveira Costa #ifdef CONFIG_X86_PAE 3805c83511bSJuergen Gross .mmu.set_pte_atomic = native_set_pte_atomic, 3815c83511bSJuergen Gross .mmu.pte_clear = native_pte_clear, 3825c83511bSJuergen Gross .mmu.pmd_clear = native_pmd_clear, 383f95f2f7bSEduardo Habkost #endif 3845c83511bSJuergen Gross .mmu.set_pud = native_set_pud, 385da5de7c2SJeremy Fitzhardinge 3865c83511bSJuergen Gross .mmu.pmd_val = PTE_IDENT, 3875c83511bSJuergen Gross .mmu.make_pmd = PTE_IDENT, 388f95f2f7bSEduardo Habkost 389f2a6a705SKirill A. Shutemov #if CONFIG_PGTABLE_LEVELS >= 4 3905c83511bSJuergen Gross .mmu.pud_val = PTE_IDENT, 3915c83511bSJuergen Gross .mmu.make_pud = PTE_IDENT, 392da5de7c2SJeremy Fitzhardinge 3935c83511bSJuergen Gross .mmu.set_p4d = native_set_p4d, 394f2a6a705SKirill A. Shutemov 395f2a6a705SKirill A. Shutemov #if CONFIG_PGTABLE_LEVELS >= 5 3965c83511bSJuergen Gross .mmu.p4d_val = PTE_IDENT, 3975c83511bSJuergen Gross .mmu.make_p4d = PTE_IDENT, 398335437fbSKirill A. Shutemov 3995c83511bSJuergen Gross .mmu.set_pgd = native_set_pgd, 400335437fbSKirill A. Shutemov #endif /* CONFIG_PGTABLE_LEVELS >= 5 */ 401f2a6a705SKirill A. Shutemov #endif /* CONFIG_PGTABLE_LEVELS >= 4 */ 40298233368SKirill A. Shutemov #endif /* CONFIG_PGTABLE_LEVELS >= 3 */ 403b1df07bdSGlauber de Oliveira Costa 4045c83511bSJuergen Gross .mmu.pte_val = PTE_IDENT, 4055c83511bSJuergen Gross .mmu.pgd_val = PTE_IDENT, 406b1df07bdSGlauber de Oliveira Costa 4075c83511bSJuergen Gross .mmu.make_pte = PTE_IDENT, 4085c83511bSJuergen Gross .mmu.make_pgd = PTE_IDENT, 409b1df07bdSGlauber de Oliveira Costa 4105c83511bSJuergen Gross .mmu.dup_mmap = paravirt_nop, 4115c83511bSJuergen Gross .mmu.activate_mm = paravirt_nop, 412b1df07bdSGlauber de Oliveira Costa 4135c83511bSJuergen Gross .mmu.lazy_mode = { 414b1df07bdSGlauber de Oliveira Costa .enter = paravirt_nop, 415b1df07bdSGlauber de Oliveira Costa .leave = paravirt_nop, 416511ba86eSBoris Ostrovsky .flush = paravirt_nop, 417b1df07bdSGlauber de Oliveira Costa }, 418aeaaa59cSJeremy Fitzhardinge 4195c83511bSJuergen Gross .mmu.set_fixmap = native_set_fixmap, 420fdc0269eSJuergen Gross #endif /* CONFIG_PARAVIRT_XXL */ 4215c83511bSJuergen Gross 4225c83511bSJuergen Gross #if defined(CONFIG_PARAVIRT_SPINLOCKS) 4235c83511bSJuergen Gross /* Lock ops. */ 4245c83511bSJuergen Gross #ifdef CONFIG_SMP 4255c83511bSJuergen Gross .lock.queued_spin_lock_slowpath = native_queued_spin_lock_slowpath, 4265c83511bSJuergen Gross .lock.queued_spin_unlock = 4275c83511bSJuergen Gross PV_CALLEE_SAVE(__native_queued_spin_unlock), 4285c83511bSJuergen Gross .lock.wait = paravirt_nop, 4295c83511bSJuergen Gross .lock.kick = paravirt_nop, 4305c83511bSJuergen Gross .lock.vcpu_is_preempted = 4315c83511bSJuergen Gross PV_CALLEE_SAVE(__native_vcpu_is_preempted), 4325c83511bSJuergen Gross #endif /* SMP */ 4335c83511bSJuergen Gross #endif 434b1df07bdSGlauber de Oliveira Costa }; 435b1df07bdSGlauber de Oliveira Costa 4369bad5658SJuergen Gross #ifdef CONFIG_PARAVIRT_XXL 4375c83511bSJuergen Gross /* At this point, native_get/set_debugreg has real function entries */ 4385c83511bSJuergen Gross NOKPROBE_SYMBOL(native_get_debugreg); 4395c83511bSJuergen Gross NOKPROBE_SYMBOL(native_set_debugreg); 4405c83511bSJuergen Gross NOKPROBE_SYMBOL(native_load_idt); 4419bad5658SJuergen Gross #endif 4425c83511bSJuergen Gross 4438af19095SJuergen Gross EXPORT_SYMBOL(pv_ops); 444b1df07bdSGlauber de Oliveira Costa EXPORT_SYMBOL_GPL(pv_info); 445