| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Jeremy Fitzhardinge | 979 | 57.35% | 20 | 23.53% |
| Juergen Gross | 356 | 20.86% | 15 | 17.65% |
| Rusty Russell | 120 | 7.03% | 3 | 3.53% |
| Kirill A. Shutemov | 42 | 2.46% | 3 | 3.53% |
| Andrew Lutomirski | 35 | 2.05% | 6 | 7.06% |
| Peter Zijlstra | 25 | 1.46% | 6 | 7.06% |
| Glauber de Oliveira Costa | 22 | 1.29% | 5 | 5.88% |
| Brijesh Singh | 17 | 1.00% | 1 | 1.18% |
| Andrew Morton | 15 | 0.88% | 1 | 1.18% |
| Xin Li (Intel) | 12 | 0.70% | 2 | 2.35% |
| Bill Wendling | 9 | 0.53% | 1 | 1.18% |
| Ingo Molnar | 9 | 0.53% | 2 | 2.35% |
| Boris Ostrovsky | 9 | 0.53% | 1 | 1.18% |
| Josh Poimboeuf | 8 | 0.47% | 2 | 2.35% |
| Aneesh Kumar K.V | 7 | 0.41% | 1 | 1.18% |
| Eduardo Pereira Habkost | 6 | 0.35% | 1 | 1.18% |
| Linus Torvalds (pre-git) | 5 | 0.29% | 2 | 2.35% |
| Kees Cook | 5 | 0.29% | 1 | 1.18% |
| Andi Kleen | 5 | 0.29% | 1 | 1.18% |
| David S. Miller | 4 | 0.23% | 1 | 1.18% |
| Thomas Gleixner | 4 | 0.23% | 2 | 2.35% |
| Tim Schmielau | 3 | 0.18% | 1 | 1.18% |
| Avi Kivity | 3 | 0.18% | 1 | 1.18% |
| Thomas Huth | 2 | 0.12% | 1 | 1.18% |
| Nadav Amit | 1 | 0.06% | 1 | 1.18% |
| Greg Kroah-Hartman | 1 | 0.06% | 1 | 1.18% |
| H. Peter Anvin | 1 | 0.06% | 1 | 1.18% |
| Masami Hiramatsu | 1 | 0.06% | 1 | 1.18% |
| Uros Bizjak | 1 | 0.06% | 1 | 1.18% |
| Total | 1707 | 85 |
/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_X86_PARAVIRT_TYPES_H #define _ASM_X86_PARAVIRT_TYPES_H #ifdef CONFIG_PARAVIRT #ifndef __ASSEMBLER__ #include <linux/types.h> #include <asm/paravirt-base.h> #include <asm/desc_defs.h> #include <asm/pgtable_types.h> #include <asm/nospec-branch.h> struct thread_struct; struct mm_struct; struct task_struct; struct cpumask; struct flush_tlb_info; struct vm_area_struct; #ifdef CONFIG_PARAVIRT_XXL struct pv_lazy_ops { /* Set deferred update mode, used for batching operations. */ void (*enter)(void); void (*leave)(void); void (*flush)(void); } __no_randomize_layout; #endif struct pv_cpu_ops { /* hooks for various privileged instructions */ void (*io_delay)(void); #ifdef CONFIG_PARAVIRT_XXL unsigned long (*get_debugreg)(int regno); void (*set_debugreg)(int regno, unsigned long value); unsigned long (*read_cr0)(void); void (*write_cr0)(unsigned long); void (*write_cr4)(unsigned long); /* Segment descriptor handling */ void (*load_tr_desc)(void); void (*load_gdt)(const struct desc_ptr *); void (*load_idt)(const struct desc_ptr *); void (*set_ldt)(const void *desc, unsigned entries); unsigned long (*store_tr)(void); void (*load_tls)(struct thread_struct *t, unsigned int cpu); void (*load_gs_index)(unsigned int idx); void (*write_ldt_entry)(struct desc_struct *ldt, int entrynum, const void *desc); void (*write_gdt_entry)(struct desc_struct *, int entrynum, const void *desc, int size); void (*write_idt_entry)(gate_desc *, int entrynum, const gate_desc *gate); void (*alloc_ldt)(struct desc_struct *ldt, unsigned entries); void (*free_ldt)(struct desc_struct *ldt, unsigned entries); void (*load_sp0)(unsigned long sp0); #ifdef CONFIG_X86_IOPL_IOPERM void (*invalidate_io_bitmap)(void); void (*update_io_bitmap)(void); #endif /* cpuid emulation, mostly so that caps bits can be disabled */ void (*cpuid)(unsigned int *eax, unsigned int *ebx, unsigned int *ecx, unsigned int *edx); /* Unsafe MSR operations. These will warn or panic on failure. */ u64 (*read_msr)(u32 msr); void (*write_msr)(u32 msr, u64 val); /* * Safe MSR operations. * Returns 0 or -EIO. */ int (*read_msr_safe)(u32 msr, u64 *val); int (*write_msr_safe)(u32 msr, u64 val); u64 (*read_pmc)(int counter); void (*start_context_switch)(struct task_struct *prev); void (*end_context_switch)(struct task_struct *next); #endif } __no_randomize_layout; struct pv_irq_ops { #ifdef CONFIG_PARAVIRT_XXL /* * Get/set interrupt state. save_fl is expected to use X86_EFLAGS_IF; * all other bits returned from save_fl are undefined. * * NOTE: These functions callers expect the callee to preserve * more registers than the standard C calling convention. */ struct paravirt_callee_save save_fl; struct paravirt_callee_save irq_disable; struct paravirt_callee_save irq_enable; #endif void (*safe_halt)(void); void (*halt)(void); } __no_randomize_layout; struct pv_mmu_ops { /* TLB operations */ void (*flush_tlb_user)(void); void (*flush_tlb_kernel)(void); void (*flush_tlb_one_user)(unsigned long addr); void (*flush_tlb_multi)(const struct cpumask *cpus, const struct flush_tlb_info *info); /* Hook for intercepting the destruction of an mm_struct. */ void (*exit_mmap)(struct mm_struct *mm); void (*notify_page_enc_status_changed)(unsigned long pfn, int npages, bool enc); #ifdef CONFIG_PARAVIRT_XXL struct paravirt_callee_save read_cr2; void (*write_cr2)(unsigned long); unsigned long (*read_cr3)(void); void (*write_cr3)(unsigned long); /* Hook for intercepting the creation/use of an mm_struct. */ void (*enter_mmap)(struct mm_struct *mm); /* Hooks for allocating and freeing a pagetable top-level */ int (*pgd_alloc)(struct mm_struct *mm); void (*pgd_free)(struct mm_struct *mm, pgd_t *pgd); /* * Hooks for allocating/releasing pagetable pages when they're * attached to a pagetable */ void (*alloc_pte)(struct mm_struct *mm, unsigned long pfn); void (*alloc_pmd)(struct mm_struct *mm, unsigned long pfn); void (*alloc_pud)(struct mm_struct *mm, unsigned long pfn); void (*alloc_p4d)(struct mm_struct *mm, unsigned long pfn); void (*release_pte)(unsigned long pfn); void (*release_pmd)(unsigned long pfn); void (*release_pud)(unsigned long pfn); void (*release_p4d)(unsigned long pfn); /* Pagetable manipulation functions */ void (*set_pte)(pte_t *ptep, pte_t pteval); void (*set_pmd)(pmd_t *pmdp, pmd_t pmdval); pte_t (*ptep_modify_prot_start)(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep); void (*ptep_modify_prot_commit)(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep, pte_t pte); struct paravirt_callee_save pte_val; struct paravirt_callee_save make_pte; struct paravirt_callee_save pgd_val; struct paravirt_callee_save make_pgd; void (*set_pud)(pud_t *pudp, pud_t pudval); struct paravirt_callee_save pmd_val; struct paravirt_callee_save make_pmd; struct paravirt_callee_save pud_val; struct paravirt_callee_save make_pud; void (*set_p4d)(p4d_t *p4dp, p4d_t p4dval); struct paravirt_callee_save p4d_val; struct paravirt_callee_save make_p4d; void (*set_pgd)(pgd_t *pgdp, pgd_t pgdval); struct pv_lazy_ops lazy_mode; /* dom0 ops */ /* Sometimes the physical address is a pfn, and sometimes its an mfn. We can tell which is which from the index. */ void (*set_fixmap)(unsigned /* enum fixed_addresses */ idx, phys_addr_t phys, pgprot_t flags); #endif } __no_randomize_layout; /* This contains all the paravirt structures: we get a convenient * number for each function using the offset which we use to indicate * what to patch. */ struct paravirt_patch_template { struct pv_cpu_ops cpu; struct pv_irq_ops irq; struct pv_mmu_ops mmu; } __no_randomize_layout; extern struct paravirt_patch_template pv_ops; #define paravirt_ptr(array, op) [paravirt_opptr] "m" (array.op) /* * This generates an indirect call based on the operation type number. * * Since alternatives run after enabling CET/IBT -- the latter setting/clearing * capabilities and the former requiring all capabilities being finalized -- * these indirect calls are subject to IBT and the paravirt stubs should have * ENDBR on. * * OTOH since this is effectively a __nocfi indirect call, the paravirt stubs * don't need to bother with CFI prefixes. */ #define PARAVIRT_CALL \ ANNOTATE_RETPOLINE_SAFE "\n\t" \ "call *%[paravirt_opptr]" /* * These macros are intended to wrap calls through one of the paravirt * ops structs, so that they can be later identified and patched at * runtime. * * Normally, a call to a pv_op function is a simple indirect call: * (pv_op_struct.operations)(args...). * * Unfortunately, this is a relatively slow operation for modern CPUs, * because it cannot necessarily determine what the destination * address is. In this case, the address is a runtime constant, so at * the very least we can patch the call to a simple direct call, or, * ideally, patch an inline implementation into the callsite. (Direct * calls are essentially free, because the call and return addresses * are completely predictable.) * * For i386, these macros rely on the standard gcc "regparm(3)" calling * convention, in which the first three arguments are placed in %eax, * %edx, %ecx (in that order), and the remaining arguments are placed * on the stack. All caller-save registers (eax,edx,ecx) are expected * to be modified (either clobbered or used for return values). * X86_64, on the other hand, already specifies a register-based calling * conventions, returning at %rax, with parameters going in %rdi, %rsi, * %rdx, and %rcx. Note that for this reason, x86_64 does not need any * special handling for dealing with 4 arguments, unlike i386. * However, x86_64 also has to clobber all caller saved registers, which * unfortunately, are quite a bit (r8 - r11) * * Unfortunately there's no way to get gcc to generate the args setup * for the call, and then allow the call itself to be generated by an * inline asm. Because of this, we must do the complete arg setup and * return value handling from within these macros. This is fairly * cumbersome. * * There are 5 sets of PVOP_* macros for dealing with 0-4 arguments. * It could be extended to more arguments, but there would be little * to be gained from that. For each number of arguments, there are * two VCALL and CALL variants for void and non-void functions. * * When there is a return value, the invoker of the macro must specify * the return type. The macro then uses sizeof() on that type to * determine whether it's a 32 or 64 bit value and places the return * in the right register(s) (just %eax for 32-bit, and %edx:%eax for * 64-bit). For x86_64 machines, it just returns in %rax regardless of * the return value size. * * 64-bit arguments are passed as a pair of adjacent 32-bit arguments; * i386 also passes 64-bit arguments as a pair of adjacent 32-bit arguments * in low,high order * * Small structures are passed and returned in registers. The macro * calling convention can't directly deal with this, so the wrapper * functions must do it. * * These PVOP_* macros are only defined within this header. This * means that all uses must be wrapped in inline functions. This also * makes sure the incoming and outgoing types are always correct. */ #ifdef CONFIG_X86_32 #define PVOP_CALL_ARGS \ unsigned long __eax = __eax, __edx = __edx, __ecx = __ecx; #define PVOP_CALL_ARG1(x) "a" ((unsigned long)(x)) #define PVOP_CALL_ARG2(x) "d" ((unsigned long)(x)) #define PVOP_CALL_ARG3(x) "c" ((unsigned long)(x)) #define PVOP_VCALL_CLOBBERS "=a" (__eax), "=d" (__edx), \ "=c" (__ecx) #define PVOP_CALL_CLOBBERS PVOP_VCALL_CLOBBERS #define PVOP_VCALLEE_CLOBBERS "=a" (__eax), "=d" (__edx) #define PVOP_CALLEE_CLOBBERS PVOP_VCALLEE_CLOBBERS #define EXTRA_CLOBBERS #define VEXTRA_CLOBBERS #else /* CONFIG_X86_64 */ /* [re]ax isn't an arg, but the return val */ #define PVOP_CALL_ARGS \ unsigned long __edi = __edi, __esi = __esi, \ __edx = __edx, __ecx = __ecx, __eax = __eax; #define PVOP_CALL_ARG1(x) "D" ((unsigned long)(x)) #define PVOP_CALL_ARG2(x) "S" ((unsigned long)(x)) #define PVOP_CALL_ARG3(x) "d" ((unsigned long)(x)) #define PVOP_CALL_ARG4(x) "c" ((unsigned long)(x)) #define PVOP_VCALL_CLOBBERS "=D" (__edi), \ "=S" (__esi), "=d" (__edx), \ "=c" (__ecx) #define PVOP_CALL_CLOBBERS PVOP_VCALL_CLOBBERS, "=a" (__eax) /* * void functions are still allowed [re]ax for scratch. * * The ZERO_CALL_USED REGS feature may end up zeroing out callee-saved * registers. Make sure we model this with the appropriate clobbers. */ #ifdef CONFIG_ZERO_CALL_USED_REGS #define PVOP_VCALLEE_CLOBBERS "=a" (__eax), PVOP_VCALL_CLOBBERS #else #define PVOP_VCALLEE_CLOBBERS "=a" (__eax) #endif #define PVOP_CALLEE_CLOBBERS PVOP_VCALLEE_CLOBBERS #define EXTRA_CLOBBERS , "r8", "r9", "r10", "r11" #define VEXTRA_CLOBBERS , "rax", "r8", "r9", "r10", "r11" #endif /* CONFIG_X86_32 */ #define PVOP_RETVAL(rettype) \ ({ unsigned long __mask = ~0UL; \ BUILD_BUG_ON(sizeof(rettype) > sizeof(unsigned long)); \ switch (sizeof(rettype)) { \ case 1: __mask = 0xffUL; break; \ case 2: __mask = 0xffffUL; break; \ case 4: __mask = 0xffffffffUL; break; \ default: break; \ } \ __mask & __eax; \ }) /* * Use alternative patching for paravirt calls: * - For replacing an indirect call with a direct one, use the "normal" * ALTERNATIVE() macro with the indirect call as the initial code sequence, * which will be replaced with the related direct call by using the * ALT_FLAG_DIRECT_CALL special case and the "always on" feature. * - In case the replacement is either a direct call or a short code sequence * depending on a feature bit, the ALTERNATIVE_2() macro is being used. * The indirect call is the initial code sequence again, while the special * code sequence is selected with the specified feature bit. In case the * feature is not active, the direct call is used as above via the * ALT_FLAG_DIRECT_CALL special case and the "always on" feature. */ #define ____PVOP_CALL(ret, array, op, call_clbr, extra_clbr, ...) \ ({ \ PVOP_CALL_ARGS; \ asm volatile(ALTERNATIVE(PARAVIRT_CALL, ALT_CALL_INSTR, \ ALT_CALL_ALWAYS) \ : call_clbr, ASM_CALL_CONSTRAINT \ : paravirt_ptr(array, op), \ ##__VA_ARGS__ \ : "memory", "cc" extra_clbr); \ ret; \ }) #define ____PVOP_ALT_CALL(ret, array, op, alt, cond, call_clbr, \ extra_clbr, ...) \ ({ \ PVOP_CALL_ARGS; \ asm volatile(ALTERNATIVE_2(PARAVIRT_CALL, \ ALT_CALL_INSTR, ALT_CALL_ALWAYS, \ alt, cond) \ : call_clbr, ASM_CALL_CONSTRAINT \ : paravirt_ptr(array, op), \ ##__VA_ARGS__ \ : "memory", "cc" extra_clbr); \ ret; \ }) #define __PVOP_CALL(rettype, array, op, ...) \ ____PVOP_CALL(PVOP_RETVAL(rettype), array, op, \ PVOP_CALL_CLOBBERS, EXTRA_CLOBBERS, ##__VA_ARGS__) #define __PVOP_ALT_CALL(rettype, array, op, alt, cond, ...) \ ____PVOP_ALT_CALL(PVOP_RETVAL(rettype), array, op, alt, cond, \ PVOP_CALL_CLOBBERS, EXTRA_CLOBBERS, \ ##__VA_ARGS__) #define __PVOP_CALLEESAVE(rettype, array, op, ...) \ ____PVOP_CALL(PVOP_RETVAL(rettype), array, op.func, \ PVOP_CALLEE_CLOBBERS, , ##__VA_ARGS__) #define __PVOP_ALT_CALLEESAVE(rettype, array, op, alt, cond, ...) \ ____PVOP_ALT_CALL(PVOP_RETVAL(rettype), array, op.func, alt, cond, \ PVOP_CALLEE_CLOBBERS, , ##__VA_ARGS__) #define __PVOP_VCALL(array, op, ...) \ (void)____PVOP_CALL(, array, op, PVOP_VCALL_CLOBBERS, \ VEXTRA_CLOBBERS, ##__VA_ARGS__) #define __PVOP_ALT_VCALL(array, op, alt, cond, ...) \ (void)____PVOP_ALT_CALL(, array, op, alt, cond, \ PVOP_VCALL_CLOBBERS, VEXTRA_CLOBBERS, \ ##__VA_ARGS__) #define __PVOP_VCALLEESAVE(array, op, ...) \ (void)____PVOP_CALL(, array, op.func, \ PVOP_VCALLEE_CLOBBERS, , ##__VA_ARGS__) #define __PVOP_ALT_VCALLEESAVE(array, op, alt, cond, ...) \ (void)____PVOP_ALT_CALL(, array, op.func, alt, cond, \ PVOP_VCALLEE_CLOBBERS, , ##__VA_ARGS__) #define PVOP_CALL0(rettype, array, op) \ __PVOP_CALL(rettype, array, op) #define PVOP_VCALL0(array, op) \ __PVOP_VCALL(array, op) #define PVOP_ALT_CALL0(rettype, array, op, alt, cond) \ __PVOP_ALT_CALL(rettype, array, op, alt, cond) #define PVOP_ALT_VCALL0(array, op, alt, cond) \ __PVOP_ALT_VCALL(array, op, alt, cond) #define PVOP_CALLEE0(rettype, array, op) \ __PVOP_CALLEESAVE(rettype, array, op) #define PVOP_VCALLEE0(array, op) \ __PVOP_VCALLEESAVE(array, op) #define PVOP_ALT_CALLEE0(rettype, array, op, alt, cond) \ __PVOP_ALT_CALLEESAVE(rettype, array, op, alt, cond) #define PVOP_ALT_VCALLEE0(array, op, alt, cond) \ __PVOP_ALT_VCALLEESAVE(array, op, alt, cond) #define PVOP_CALL1(rettype, array, op, arg1) \ __PVOP_CALL(rettype, array, op, PVOP_CALL_ARG1(arg1)) #define PVOP_VCALL1(array, op, arg1) \ __PVOP_VCALL(array, op, PVOP_CALL_ARG1(arg1)) #define PVOP_ALT_VCALL1(array, op, arg1, alt, cond) \ __PVOP_ALT_VCALL(array, op, alt, cond, PVOP_CALL_ARG1(arg1)) #define PVOP_CALLEE1(rettype, array, op, arg1) \ __PVOP_CALLEESAVE(rettype, array, op, PVOP_CALL_ARG1(arg1)) #define PVOP_VCALLEE1(array, op, arg1) \ __PVOP_VCALLEESAVE(array, op, PVOP_CALL_ARG1(arg1)) #define PVOP_ALT_CALLEE1(rettype, array, op, arg1, alt, cond) \ __PVOP_ALT_CALLEESAVE(rettype, array, op, alt, cond, PVOP_CALL_ARG1(arg1)) #define PVOP_ALT_VCALLEE1(array, op, arg1, alt, cond) \ __PVOP_ALT_VCALLEESAVE(array, op, alt, cond, PVOP_CALL_ARG1(arg1)) #define PVOP_CALL2(rettype, array, op, arg1, arg2) \ __PVOP_CALL(rettype, array, op, PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2)) #define PVOP_VCALL2(array, op, arg1, arg2) \ __PVOP_VCALL(array, op, PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2)) #define PVOP_CALL3(rettype, array, op, arg1, arg2, arg3) \ __PVOP_CALL(rettype, array, op, PVOP_CALL_ARG1(arg1), \ PVOP_CALL_ARG2(arg2), PVOP_CALL_ARG3(arg3)) #define PVOP_VCALL3(array, op, arg1, arg2, arg3) \ __PVOP_VCALL(array, op, PVOP_CALL_ARG1(arg1), \ PVOP_CALL_ARG2(arg2), PVOP_CALL_ARG3(arg3)) #define PVOP_CALL4(rettype, array, op, arg1, arg2, arg3, arg4) \ __PVOP_CALL(rettype, array, op, \ PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2), \ PVOP_CALL_ARG3(arg3), PVOP_CALL_ARG4(arg4)) #define PVOP_VCALL4(array, op, arg1, arg2, arg3, arg4) \ __PVOP_VCALL(array, op, PVOP_CALL_ARG1(arg1), PVOP_CALL_ARG2(arg2), \ PVOP_CALL_ARG3(arg3), PVOP_CALL_ARG4(arg4)) #endif /* __ASSEMBLER__ */ #define ALT_NOT_XEN ALT_NOT(X86_FEATURE_XENPV) #ifdef CONFIG_X86_32 /* 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;" #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;" #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, section) \ extern typeof(func) __raw_callee_save_##func; \ \ asm(".pushsection " section ", \"ax\";" \ ".globl " PV_THUNK_NAME(func) ";" \ ".type " PV_THUNK_NAME(func) ", @function;" \ ASM_FUNC_ALIGN \ PV_THUNK_NAME(func) ":" \ ASM_ENDBR \ 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") #define PV_CALLEE_SAVE_REGS_THUNK(func) \ __PV_CALLEE_SAVE_REGS_THUNK(func, ".text") /* 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 }) #endif /* CONFIG_PARAVIRT */ #endif /* _ASM_X86_PARAVIRT_TYPES_H */
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