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📄 irq_regs.h
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📄 irq_remapping.h
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📄 irqflags.h
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📄 ist.h
735 B
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815 B
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📄 mmconfig.h
374 B
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129 B
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256 B
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314 B
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740 B
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654 B
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684 B
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EDIT: paravirt.h
/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_X86_PARAVIRT_H #define _ASM_X86_PARAVIRT_H /* Various instructions on x86 need to be replaced for * para-virtualization: those hooks are defined here. */ #ifdef CONFIG_PARAVIRT #include <asm/pgtable_types.h> #include <asm/asm.h> #include <asm/nospec-branch.h> #include <asm/paravirt_types.h> #ifndef __ASSEMBLY__ #include <linux/bug.h> #include <linux/types.h> #include <linux/cpumask.h> #include <asm/frame.h> static inline void notify_page_enc_status_changed(unsigned long pfn, int npages, bool enc) { PVOP_VCALL3(pv_mmu_ops.notify_page_enc_status_changed, pfn, npages, enc); } static inline void load_sp0(unsigned long sp0) { PVOP_VCALL1(pv_cpu_ops.load_sp0, sp0); } /* The paravirtualized CPUID instruction. */ static inline void __cpuid(unsigned int *eax, unsigned int *ebx, unsigned int *ecx, unsigned int *edx) { PVOP_VCALL4(pv_cpu_ops.cpuid, eax, ebx, ecx, edx); } /* * These special macros can be used to get or set a debugging register */ static inline unsigned long paravirt_get_debugreg(int reg) { return PVOP_CALL1(unsigned long, pv_cpu_ops.get_debugreg, reg); } #define get_debugreg(var, reg) var = paravirt_get_debugreg(reg) static inline void set_debugreg(unsigned long val, int reg) { PVOP_VCALL2(pv_cpu_ops.set_debugreg, reg, val); } static inline unsigned long read_cr0(void) { return PVOP_CALL0(unsigned long, pv_cpu_ops.read_cr0); } static inline void write_cr0(unsigned long x) { PVOP_VCALL1(pv_cpu_ops.write_cr0, x); } static inline unsigned long read_cr2(void) { return PVOP_CALL0(unsigned long, pv_mmu_ops.read_cr2); } static inline void write_cr2(unsigned long x) { PVOP_VCALL1(pv_mmu_ops.write_cr2, x); } static inline unsigned long __read_cr3(void) { return PVOP_CALL0(unsigned long, pv_mmu_ops.read_cr3); } static inline void write_cr3(unsigned long x) { PVOP_VCALL1(pv_mmu_ops.write_cr3, x); } static inline void __write_cr4(unsigned long x) { PVOP_VCALL1(pv_cpu_ops.write_cr4, x); } #ifdef CONFIG_X86_64 static inline unsigned long read_cr8(void) { return PVOP_CALL0(unsigned long, pv_cpu_ops.read_cr8); } static inline void write_cr8(unsigned long x) { PVOP_VCALL1(pv_cpu_ops.write_cr8, x); } #endif static inline void arch_safe_halt(void) { PVOP_VCALL0(pv_irq_ops.safe_halt); } static inline void halt(void) { PVOP_VCALL0(pv_irq_ops.halt); } static inline void wbinvd(void) { PVOP_VCALL0(pv_cpu_ops.wbinvd); } #define get_kernel_rpl() (pv_info.kernel_rpl) static inline u64 paravirt_read_msr(unsigned msr) { return PVOP_CALL1(u64, pv_cpu_ops.read_msr, msr); } static inline void paravirt_write_msr(unsigned msr, unsigned low, unsigned high) { PVOP_VCALL3(pv_cpu_ops.write_msr, msr, low, high); } static inline u64 paravirt_read_msr_safe(unsigned msr, int *err) { return PVOP_CALL2(u64, pv_cpu_ops.read_msr_safe, msr, err); } static inline int paravirt_write_msr_safe(unsigned msr, unsigned low, unsigned high) { return PVOP_CALL3(int, pv_cpu_ops.write_msr_safe, msr, low, high); } #define rdmsr(msr, val1, val2) \ do { \ u64 _l = paravirt_read_msr(msr); \ val1 = (u32)_l; \ val2 = _l >> 32; \ } while (0) #define wrmsr(msr, val1, val2) \ do { \ paravirt_write_msr(msr, val1, val2); \ } while (0) #define rdmsrl(msr, val) \ do { \ val = paravirt_read_msr(msr); \ } while (0) static inline void wrmsrl(unsigned msr, u64 val) { wrmsr(msr, (u32)val, (u32)(val>>32)); } #define wrmsr_safe(msr, a, b) paravirt_write_msr_safe(msr, a, b) /* rdmsr with exception handling */ #define rdmsr_safe(msr, a, b) \ ({ \ int _err; \ u64 _l = paravirt_read_msr_safe(msr, &_err); \ (*a) = (u32)_l; \ (*b) = _l >> 32; \ _err; \ }) static inline int rdmsrl_safe(unsigned msr, unsigned long long *p) { int err; *p = paravirt_read_msr_safe(msr, &err); return err; } static inline unsigned long long paravirt_sched_clock(void) { return PVOP_CALL0(unsigned long long, pv_time_ops.sched_clock); } struct static_key; extern struct static_key paravirt_steal_enabled; extern struct static_key paravirt_steal_rq_enabled; __visible void __native_queued_spin_unlock(struct qspinlock *lock); bool pv_is_native_spin_unlock(void); __visible bool __native_vcpu_is_preempted(long cpu); bool pv_is_native_vcpu_is_preempted(void); static inline u64 paravirt_steal_clock(int cpu) { return PVOP_CALL1(u64, pv_time_ops.steal_clock, cpu); } static inline unsigned long long paravirt_read_pmc(int counter) { return PVOP_CALL1(u64, pv_cpu_ops.read_pmc, counter); } #define rdpmc(counter, low, high) \ do { \ u64 _l = paravirt_read_pmc(counter); \ low = (u32)_l; \ high = _l >> 32; \ } while (0) #define rdpmcl(counter, val) ((val) = paravirt_read_pmc(counter)) static inline void paravirt_alloc_ldt(struct desc_struct *ldt, unsigned entries) { PVOP_VCALL2(pv_cpu_ops.alloc_ldt, ldt, entries); } static inline void paravirt_free_ldt(struct desc_struct *ldt, unsigned entries) { PVOP_VCALL2(pv_cpu_ops.free_ldt, ldt, entries); } static inline void load_TR_desc(void) { PVOP_VCALL0(pv_cpu_ops.load_tr_desc); } static inline void load_gdt(const struct desc_ptr *dtr) { PVOP_VCALL1(pv_cpu_ops.load_gdt, dtr); } static inline void load_idt(const struct desc_ptr *dtr) { PVOP_VCALL1(pv_cpu_ops.load_idt, dtr); } static inline void set_ldt(const void *addr, unsigned entries) { PVOP_VCALL2(pv_cpu_ops.set_ldt, addr, entries); } static inline unsigned long paravirt_store_tr(void) { return PVOP_CALL0(unsigned long, pv_cpu_ops.store_tr); } #define store_tr(tr) ((tr) = paravirt_store_tr()) static inline void load_TLS(struct thread_struct *t, unsigned cpu) { PVOP_VCALL2(pv_cpu_ops.load_tls, t, cpu); } #ifdef CONFIG_X86_64 static inline void load_gs_index(unsigned int gs) { PVOP_VCALL1(pv_cpu_ops.load_gs_index, gs); } #endif static inline void write_ldt_entry(struct desc_struct *dt, int entry, const void *desc) { PVOP_VCALL3(pv_cpu_ops.write_ldt_entry, dt, entry, desc); } static inline void write_gdt_entry(struct desc_struct *dt, int entry, void *desc, int type) { PVOP_VCALL4(pv_cpu_ops.write_gdt_entry, dt, entry, desc, type); } static inline void write_idt_entry(gate_desc *dt, int entry, const gate_desc *g) { PVOP_VCALL3(pv_cpu_ops.write_idt_entry, dt, entry, g); } static inline void set_iopl_mask(unsigned mask) { PVOP_VCALL1(pv_cpu_ops.set_iopl_mask, mask); } #ifdef CONFIG_PARAVIRT_SPINLOCKS void __init paravirt_set_cap(void); #endif /* The paravirtualized I/O functions */ static inline void slow_down_io(void) { pv_cpu_ops.io_delay(); #ifdef REALLY_SLOW_IO pv_cpu_ops.io_delay(); pv_cpu_ops.io_delay(); pv_cpu_ops.io_delay(); #endif } static inline void paravirt_activate_mm(struct mm_struct *prev, struct mm_struct *next) { PVOP_VCALL2(pv_mmu_ops.activate_mm, prev, next); } static inline void paravirt_arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm) { PVOP_VCALL2(pv_mmu_ops.dup_mmap, oldmm, mm); } static inline void paravirt_arch_exit_mmap(struct mm_struct *mm) { PVOP_VCALL1(pv_mmu_ops.exit_mmap, mm); } static inline void __flush_tlb(void) { PVOP_VCALL0(pv_mmu_ops.flush_tlb_user); } static inline void __flush_tlb_global(void) { PVOP_VCALL0(pv_mmu_ops.flush_tlb_kernel); } static inline void __flush_tlb_one_user(unsigned long addr) { PVOP_VCALL1(pv_mmu_ops.flush_tlb_one_user, addr); } static inline void flush_tlb_others(const struct cpumask *cpumask, const struct flush_tlb_info *info) { PVOP_VCALL2(pv_mmu_ops.flush_tlb_others, cpumask, info); } static inline void paravirt_tlb_remove_table(struct mmu_gather *tlb, void *table) { PVOP_VCALL2(pv_mmu_ops.tlb_remove_table, tlb, table); } static inline int paravirt_pgd_alloc(struct mm_struct *mm) { return PVOP_CALL1(int, pv_mmu_ops.pgd_alloc, mm); } static inline void paravirt_pgd_free(struct mm_struct *mm, pgd_t *pgd) { PVOP_VCALL2(pv_mmu_ops.pgd_free, mm, pgd); } static inline void paravirt_alloc_pte(struct mm_struct *mm, unsigned long pfn) { PVOP_VCALL2(pv_mmu_ops.alloc_pte, mm, pfn); } static inline void paravirt_release_pte(unsigned long pfn) { PVOP_VCALL1(pv_mmu_ops.release_pte, pfn); } static inline void paravirt_alloc_pmd(struct mm_struct *mm, unsigned long pfn) { PVOP_VCALL2(pv_mmu_ops.alloc_pmd, mm, pfn); } static inline void paravirt_release_pmd(unsigned long pfn) { PVOP_VCALL1(pv_mmu_ops.release_pmd, pfn); } static inline void paravirt_alloc_pud(struct mm_struct *mm, unsigned long pfn) { PVOP_VCALL2(pv_mmu_ops.alloc_pud, mm, pfn); } static inline void paravirt_release_pud(unsigned long pfn) { PVOP_VCALL1(pv_mmu_ops.release_pud, pfn); } static inline void paravirt_alloc_p4d(struct mm_struct *mm, unsigned long pfn) { PVOP_VCALL2(pv_mmu_ops.alloc_p4d, mm, pfn); } static inline void paravirt_release_p4d(unsigned long pfn) { PVOP_VCALL1(pv_mmu_ops.release_p4d, pfn); } static inline pte_t __pte(pteval_t val) { pteval_t ret; if (sizeof(pteval_t) > sizeof(long)) ret = PVOP_CALLEE2(pteval_t, pv_mmu_ops.make_pte, val, (u64)val >> 32); else ret = PVOP_CALLEE1(pteval_t, pv_mmu_ops.make_pte, val); return (pte_t) { .pte = ret }; } static inline pteval_t pte_val(pte_t pte) { pteval_t ret; if (sizeof(pteval_t) > sizeof(long)) ret = PVOP_CALLEE2(pteval_t, pv_mmu_ops.pte_val, pte.pte, (u64)pte.pte >> 32); else ret = PVOP_CALLEE1(pteval_t, pv_mmu_ops.pte_val, pte.pte); return ret; } static inline pgd_t __pgd(pgdval_t val) { pgdval_t ret; if (sizeof(pgdval_t) > sizeof(long)) ret = PVOP_CALLEE2(pgdval_t, pv_mmu_ops.make_pgd, val, (u64)val >> 32); else ret = PVOP_CALLEE1(pgdval_t, pv_mmu_ops.make_pgd, val); return (pgd_t) { ret }; } static inline pgdval_t pgd_val(pgd_t pgd) { pgdval_t ret; if (sizeof(pgdval_t) > sizeof(long)) ret = PVOP_CALLEE2(pgdval_t, pv_mmu_ops.pgd_val, pgd.pgd, (u64)pgd.pgd >> 32); else ret = PVOP_CALLEE1(pgdval_t, pv_mmu_ops.pgd_val, pgd.pgd); return ret; } #define __HAVE_ARCH_PTEP_MODIFY_PROT_TRANSACTION static inline pte_t ptep_modify_prot_start(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep) { pteval_t ret; ret = PVOP_CALL3(pteval_t, pv_mmu_ops.ptep_modify_prot_start, vma, addr, ptep); return (pte_t) { .pte = ret }; } static inline void ptep_modify_prot_commit(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep, pte_t old_pte, pte_t pte) { if (sizeof(pteval_t) > sizeof(long)) /* 5 arg words */ pv_mmu_ops.ptep_modify_prot_commit(vma, addr, ptep, pte); else PVOP_VCALL4(pv_mmu_ops.ptep_modify_prot_commit, vma, addr, ptep, pte.pte); } static inline void set_pte(pte_t *ptep, pte_t pte) { if (sizeof(pteval_t) > sizeof(long)) PVOP_VCALL3(pv_mmu_ops.set_pte, ptep, pte.pte, (u64)pte.pte >> 32); else PVOP_VCALL2(pv_mmu_ops.set_pte, ptep, pte.pte); } static inline void set_pte_at(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pte) { if (sizeof(pteval_t) > sizeof(long)) /* 5 arg words */ pv_mmu_ops.set_pte_at(mm, addr, ptep, pte); else PVOP_VCALL4(pv_mmu_ops.set_pte_at, mm, addr, ptep, pte.pte); } static inline void set_pmd(pmd_t *pmdp, pmd_t pmd) { pmdval_t val = native_pmd_val(pmd); if (sizeof(pmdval_t) > sizeof(long)) PVOP_VCALL3(pv_mmu_ops.set_pmd, pmdp, val, (u64)val >> 32); else PVOP_VCALL2(pv_mmu_ops.set_pmd, pmdp, val); } #if CONFIG_PGTABLE_LEVELS >= 3 static inline pmd_t __pmd(pmdval_t val) { pmdval_t ret; if (sizeof(pmdval_t) > sizeof(long)) ret = PVOP_CALLEE2(pmdval_t, pv_mmu_ops.make_pmd, val, (u64)val >> 32); else ret = PVOP_CALLEE1(pmdval_t, pv_mmu_ops.make_pmd, val); return (pmd_t) { ret }; } static inline pmdval_t pmd_val(pmd_t pmd) { pmdval_t ret; if (sizeof(pmdval_t) > sizeof(long)) ret = PVOP_CALLEE2(pmdval_t, pv_mmu_ops.pmd_val, pmd.pmd, (u64)pmd.pmd >> 32); else ret = PVOP_CALLEE1(pmdval_t, pv_mmu_ops.pmd_val, pmd.pmd); return ret; } static inline void set_pud(pud_t *pudp, pud_t pud) { pudval_t val = native_pud_val(pud); if (sizeof(pudval_t) > sizeof(long)) PVOP_VCALL3(pv_mmu_ops.set_pud, pudp, val, (u64)val >> 32); else PVOP_VCALL2(pv_mmu_ops.set_pud, pudp, val); } #if CONFIG_PGTABLE_LEVELS >= 4 static inline pud_t __pud(pudval_t val) { pudval_t ret; if (sizeof(pudval_t) > sizeof(long)) ret = PVOP_CALLEE2(pudval_t, pv_mmu_ops.make_pud, val, (u64)val >> 32); else ret = PVOP_CALLEE1(pudval_t, pv_mmu_ops.make_pud, val); return (pud_t) { ret }; } static inline pudval_t pud_val(pud_t pud) { pudval_t ret; if (sizeof(pudval_t) > sizeof(long)) ret = PVOP_CALLEE2(pudval_t, pv_mmu_ops.pud_val, pud.pud, (u64)pud.pud >> 32); else ret = PVOP_CALLEE1(pudval_t, pv_mmu_ops.pud_val, pud.pud); return ret; } static inline void pud_clear(pud_t *pudp) { set_pud(pudp, __pud(0)); } static inline void set_p4d(p4d_t *p4dp, p4d_t p4d) { p4dval_t val = native_p4d_val(p4d); if (sizeof(p4dval_t) > sizeof(long)) PVOP_VCALL3(pv_mmu_ops.set_p4d, p4dp, val, (u64)val >> 32); else PVOP_VCALL2(pv_mmu_ops.set_p4d, p4dp, val); } #if CONFIG_PGTABLE_LEVELS >= 5 static inline p4d_t __p4d(p4dval_t val) { p4dval_t ret = PVOP_CALLEE1(p4dval_t, pv_mmu_ops.make_p4d, val); return (p4d_t) { ret }; } static inline p4dval_t p4d_val(p4d_t p4d) { return PVOP_CALLEE1(p4dval_t, pv_mmu_ops.p4d_val, p4d.p4d); } static inline void __set_pgd(pgd_t *pgdp, pgd_t pgd) { PVOP_VCALL2(pv_mmu_ops.set_pgd, pgdp, native_pgd_val(pgd)); } #define set_pgd(pgdp, pgdval) do { \ if (pgtable_l5_enabled()) \ __set_pgd(pgdp, pgdval); \ else \ set_p4d((p4d_t *)(pgdp), (p4d_t) { (pgdval).pgd }); \ } while (0) #define pgd_clear(pgdp) do { \ if (pgtable_l5_enabled()) \ set_pgd(pgdp, __pgd(0)); \ } while (0) #endif /* CONFIG_PGTABLE_LEVELS == 5 */ static inline void p4d_clear(p4d_t *p4dp) { set_p4d(p4dp, __p4d(0)); } #endif /* CONFIG_PGTABLE_LEVELS == 4 */ #endif /* CONFIG_PGTABLE_LEVELS >= 3 */ #ifdef CONFIG_X86_PAE /* Special-case pte-setting operations for PAE, which can't update a 64-bit pte atomically */ static inline void set_pte_atomic(pte_t *ptep, pte_t pte) { PVOP_VCALL3(pv_mmu_ops.set_pte_atomic, ptep, pte.pte, pte.pte >> 32); } static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep) { PVOP_VCALL3(pv_mmu_ops.pte_clear, mm, addr, ptep); } static inline void pmd_clear(pmd_t *pmdp) { PVOP_VCALL1(pv_mmu_ops.pmd_clear, pmdp); } #else /* !CONFIG_X86_PAE */ static inline void set_pte_atomic(pte_t *ptep, pte_t pte) { set_pte(ptep, pte); } static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep) { set_pte_at(mm, addr, ptep, __pte(0)); } static inline void pmd_clear(pmd_t *pmdp) { set_pmd(pmdp, __pmd(0)); } #endif /* CONFIG_X86_PAE */ #define __HAVE_ARCH_START_CONTEXT_SWITCH static inline void arch_start_context_switch(struct task_struct *prev) { PVOP_VCALL1(pv_cpu_ops.start_context_switch, prev); } static inline void arch_end_context_switch(struct task_struct *next) { PVOP_VCALL1(pv_cpu_ops.end_context_switch, next); } #define __HAVE_ARCH_ENTER_LAZY_MMU_MODE static inline void arch_enter_lazy_mmu_mode(void) { PVOP_VCALL0(pv_mmu_ops.lazy_mode.enter); } static inline void arch_leave_lazy_mmu_mode(void) { PVOP_VCALL0(pv_mmu_ops.lazy_mode.leave); } static inline void arch_flush_lazy_mmu_mode(void) { PVOP_VCALL0(pv_mmu_ops.lazy_mode.flush); } static inline void __set_fixmap(unsigned /* enum fixed_addresses */ idx, phys_addr_t phys, pgprot_t flags) { pv_mmu_ops.set_fixmap(idx, phys, flags); } #if defined(CONFIG_SMP) && defined(CONFIG_PARAVIRT_SPINLOCKS) static __always_inline void pv_queued_spin_lock_slowpath(struct qspinlock *lock, u32 val) { PVOP_VCALL2(pv_lock_ops.queued_spin_lock_slowpath, lock, val); } static __always_inline void pv_queued_spin_unlock(struct qspinlock *lock) { PVOP_VCALLEE1(pv_lock_ops.queued_spin_unlock, lock); } static __always_inline void pv_wait(u8 *ptr, u8 val) { PVOP_VCALL2(pv_lock_ops.wait, ptr, val); } static __always_inline void pv_kick(int cpu) { PVOP_VCALL1(pv_lock_ops.kick, cpu); } static __always_inline bool pv_vcpu_is_preempted(long cpu) { return PVOP_CALLEE1(bool, pv_lock_ops.vcpu_is_preempted, cpu); } #endif /* SMP && PARAVIRT_SPINLOCKS */ #ifdef CONFIG_X86_32 #define PV_SAVE_REGS "pushl %ecx; pushl %edx;" #define PV_RESTORE_REGS "popl %edx; popl %ecx;" /* save and restore all caller-save registers, except return value */ #define PV_SAVE_ALL_CALLER_REGS "pushl %ecx;" #define PV_RESTORE_ALL_CALLER_REGS "popl %ecx;" #define PV_FLAGS_ARG "0" #define PV_EXTRA_CLOBBERS #define PV_VEXTRA_CLOBBERS #else /* save and restore all caller-save registers, except return value */ #define PV_SAVE_ALL_CALLER_REGS \ "push %rcx;" \ "push %rdx;" \ "push %rsi;" \ "push %rdi;" \ "push %r8;" \ "push %r9;" \ "push %r10;" \ "push %r11;" #define PV_RESTORE_ALL_CALLER_REGS \ "pop %r11;" \ "pop %r10;" \ "pop %r9;" \ "pop %r8;" \ "pop %rdi;" \ "pop %rsi;" \ "pop %rdx;" \ "pop %rcx;" /* We save some registers, but all of them, that's too much. We clobber all * caller saved registers but the argument parameter */ #define PV_SAVE_REGS "pushq %%rdi;" #define PV_RESTORE_REGS "popq %%rdi;" #define PV_EXTRA_CLOBBERS EXTRA_CLOBBERS, "rcx" , "rdx", "rsi" #define PV_VEXTRA_CLOBBERS EXTRA_CLOBBERS, "rdi", "rcx" , "rdx", "rsi" #define PV_FLAGS_ARG "D" #endif /* * Generate a thunk around a function which saves all caller-save * registers except for the return value. This allows C functions to * be called from assembler code where fewer than normal registers are * available. It may also help code generation around calls from C * code if the common case doesn't use many registers. * * When a callee is wrapped in a thunk, the caller can assume that all * arg regs and all scratch registers are preserved across the * call. The return value in rax/eax will not be saved, even for void * functions. */ #define PV_THUNK_NAME(func) "__raw_callee_save_" #func #define PV_CALLEE_SAVE_REGS_THUNK(func) \ extern typeof(func) __raw_callee_save_##func; \ \ asm(".pushsection .text;" \ ".globl " PV_THUNK_NAME(func) ";" \ ".type " PV_THUNK_NAME(func) ", @function;" \ PV_THUNK_NAME(func) ":" \ FRAME_BEGIN \ PV_SAVE_ALL_CALLER_REGS \ "call " #func ";" \ PV_RESTORE_ALL_CALLER_REGS \ FRAME_END \ ASM_RET \ ".size " PV_THUNK_NAME(func) ", .-" PV_THUNK_NAME(func) ";" \ ".popsection") /* Get a reference to a callee-save function */ #define PV_CALLEE_SAVE(func) \ ((struct paravirt_callee_save) { __raw_callee_save_##func }) /* Promise that "func" already uses the right calling convention */ #define __PV_IS_CALLEE_SAVE(func) \ ((struct paravirt_callee_save) { func }) static inline notrace unsigned long arch_local_save_flags(void) { return PVOP_CALLEE0(unsigned long, pv_irq_ops.save_fl); } static inline notrace void arch_local_irq_restore(unsigned long f) { PVOP_VCALLEE1(pv_irq_ops.restore_fl, f); } static inline notrace void arch_local_irq_disable(void) { PVOP_VCALLEE0(pv_irq_ops.irq_disable); } static inline notrace void arch_local_irq_enable(void) { PVOP_VCALLEE0(pv_irq_ops.irq_enable); } static inline notrace unsigned long arch_local_irq_save(void) { unsigned long f; f = arch_local_save_flags(); arch_local_irq_disable(); return f; } /* Make sure as little as possible of this mess escapes. */ #undef PARAVIRT_CALL #undef __PVOP_CALL #undef __PVOP_VCALL #undef PVOP_VCALL0 #undef PVOP_CALL0 #undef PVOP_VCALL1 #undef PVOP_CALL1 #undef PVOP_VCALL2 #undef PVOP_CALL2 #undef PVOP_VCALL3 #undef PVOP_CALL3 #undef PVOP_VCALL4 #undef PVOP_CALL4 extern void default_banner(void); #else /* __ASSEMBLY__ */ #define _PVSITE(ptype, clobbers, ops, word, algn) \ 771:; \ ops; \ 772:; \ .pushsection .parainstructions,"a"; \ .align algn; \ word 771b; \ .byte ptype; \ .byte 772b-771b; \ .short clobbers; \ .popsection #define COND_PUSH(set, mask, reg) \ .if ((~(set)) & mask); push %reg; .endif #define COND_POP(set, mask, reg) \ .if ((~(set)) & mask); pop %reg; .endif #ifdef CONFIG_X86_64 #define PV_SAVE_REGS(set) \ COND_PUSH(set, CLBR_RAX, rax); \ COND_PUSH(set, CLBR_RCX, rcx); \ COND_PUSH(set, CLBR_RDX, rdx); \ COND_PUSH(set, CLBR_RSI, rsi); \ COND_PUSH(set, CLBR_RDI, rdi); \ COND_PUSH(set, CLBR_R8, r8); \ COND_PUSH(set, CLBR_R9, r9); \ COND_PUSH(set, CLBR_R10, r10); \ COND_PUSH(set, CLBR_R11, r11) #define PV_RESTORE_REGS(set) \ COND_POP(set, CLBR_R11, r11); \ COND_POP(set, CLBR_R10, r10); \ COND_POP(set, CLBR_R9, r9); \ COND_POP(set, CLBR_R8, r8); \ COND_POP(set, CLBR_RDI, rdi); \ COND_POP(set, CLBR_RSI, rsi); \ COND_POP(set, CLBR_RDX, rdx); \ COND_POP(set, CLBR_RCX, rcx); \ COND_POP(set, CLBR_RAX, rax) #define PARA_PATCH(struct, off) ((PARAVIRT_PATCH_##struct + (off)) / 8) #define PARA_SITE(ptype, clobbers, ops) _PVSITE(ptype, clobbers, ops, .quad, 8) #define PARA_INDIRECT(addr) *addr(%rip) #else #define PV_SAVE_REGS(set) \ COND_PUSH(set, CLBR_EAX, eax); \ COND_PUSH(set, CLBR_EDI, edi); \ COND_PUSH(set, CLBR_ECX, ecx); \ COND_PUSH(set, CLBR_EDX, edx) #define PV_RESTORE_REGS(set) \ COND_POP(set, CLBR_EDX, edx); \ COND_POP(set, CLBR_ECX, ecx); \ COND_POP(set, CLBR_EDI, edi); \ COND_POP(set, CLBR_EAX, eax) #define PARA_PATCH(struct, off) ((PARAVIRT_PATCH_##struct + (off)) / 4) #define PARA_SITE(ptype, clobbers, ops) _PVSITE(ptype, clobbers, ops, .long, 4) #define PARA_INDIRECT(addr) *%cs:addr #endif #define INTERRUPT_RETURN \ PARA_SITE(PARA_PATCH(pv_cpu_ops, PV_CPU_iret), CLBR_NONE, \ ANNOTATE_RETPOLINE_SAFE; \ jmp PARA_INDIRECT(pv_cpu_ops+PV_CPU_iret);) #define DISABLE_INTERRUPTS(clobbers) \ PARA_SITE(PARA_PATCH(pv_irq_ops, PV_IRQ_irq_disable), clobbers, \ PV_SAVE_REGS(clobbers | CLBR_CALLEE_SAVE); \ ANNOTATE_RETPOLINE_SAFE; \ call PARA_INDIRECT(pv_irq_ops+PV_IRQ_irq_disable); \ PV_RESTORE_REGS(clobbers | CLBR_CALLEE_SAVE);) #define ENABLE_INTERRUPTS(clobbers) \ PARA_SITE(PARA_PATCH(pv_irq_ops, PV_IRQ_irq_enable), clobbers, \ PV_SAVE_REGS(clobbers | CLBR_CALLEE_SAVE); \ ANNOTATE_RETPOLINE_SAFE; \ call PARA_INDIRECT(pv_irq_ops+PV_IRQ_irq_enable); \ PV_RESTORE_REGS(clobbers | CLBR_CALLEE_SAVE);) #ifdef CONFIG_X86_64 /* * If swapgs is used while the userspace stack is still current, * there's no way to call a pvop. The PV replacement *must* be * inlined, or the swapgs instruction must be trapped and emulated. */ #define SWAPGS_UNSAFE_STACK \ PARA_SITE(PARA_PATCH(pv_cpu_ops, PV_CPU_swapgs), CLBR_NONE, \ swapgs) /* * Note: swapgs is very special, and in practise is either going to be * implemented with a single "swapgs" instruction or something very * special. Either way, we don't need to save any registers for * it. */ #define SWAPGS \ PARA_SITE(PARA_PATCH(pv_cpu_ops, PV_CPU_swapgs), CLBR_NONE, \ ANNOTATE_RETPOLINE_SAFE; \ call PARA_INDIRECT(pv_cpu_ops+PV_CPU_swapgs); \ ) #define GET_CR2_INTO_RAX \ ANNOTATE_RETPOLINE_SAFE; \ call PARA_INDIRECT(pv_mmu_ops+PV_MMU_read_cr2); #define USERGS_SYSRET64 \ PARA_SITE(PARA_PATCH(pv_cpu_ops, PV_CPU_usergs_sysret64), \ CLBR_NONE, \ ANNOTATE_RETPOLINE_SAFE; \ jmp PARA_INDIRECT(pv_cpu_ops+PV_CPU_usergs_sysret64);) #ifdef CONFIG_DEBUG_ENTRY #define SAVE_FLAGS(clobbers) \ PARA_SITE(PARA_PATCH(pv_irq_ops, PV_IRQ_save_fl), clobbers, \ PV_SAVE_REGS(clobbers | CLBR_CALLEE_SAVE); \ ANNOTATE_RETPOLINE_SAFE; \ call PARA_INDIRECT(pv_irq_ops+PV_IRQ_save_fl); \ PV_RESTORE_REGS(clobbers | CLBR_CALLEE_SAVE);) #endif #endif /* CONFIG_X86_32 */ #endif /* __ASSEMBLY__ */ #else /* CONFIG_PARAVIRT */ # define default_banner x86_init_noop #ifndef __ASSEMBLY__ static inline void paravirt_arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm) { } static inline void paravirt_arch_exit_mmap(struct mm_struct *mm) { } #ifndef CONFIG_PARAVIRT_SPINLOCKS static inline void paravirt_set_cap(void) { } #endif #endif /* __ASSEMBLY__ */ #endif /* !CONFIG_PARAVIRT */ #endif /* _ASM_X86_PARAVIRT_H */