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[XEN PATCH][for-4.19] xen: replace occurrences of SAF-1-safe with asmlinkage attribute

The comment-based justifications for MISRA C:2012 Rule 8.4 are replaced by the asmlinkage pseudo-attribute, for the sake of uniformity. The deviation with a comment based on the SAF framework is also mentioned as a last resort. Add missing 'xen/compiler.h' #include-s where needed. The text in docs/misra/deviations.rst is modified to reflect this change. Signed-off-by: Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx> --- docs/misra/deviations.rst | 6 +++--- xen/arch/arm/cpuerrata.c | 7 +++---- xen/arch/arm/setup.c | 5 ++--- xen/arch/arm/smpboot.c | 3 +-- xen/arch/arm/traps.c | 21 +++++++-------------- xen/arch/x86/boot/cmdline.c | 5 +++-- xen/arch/x86/boot/reloc.c | 7 ++++--- xen/arch/x86/extable.c | 3 +-- xen/arch/x86/setup.c | 3 +-- xen/arch/x86/traps.c | 27 +++++++++------------------ xen/common/efi/boot.c | 5 ++--- 11 files changed, 36 insertions(+), 56 deletions(-) diff --git a/docs/misra/deviations.rst b/docs/misra/deviations.rst index d468da2f5ce9..ed5d36c08647 100644 --- a/docs/misra/deviations.rst +++ b/docs/misra/deviations.rst @@ -134,9 +134,9 @@ Deviations related to MISRA C:2012 Rules: - Tagged as `safe` for ECLAIR. * - R8.4 - - Functions and variables used only by asm modules are either marked with - the `asmlinkage` macro or with a SAF-1-safe textual deviation - (see safe.json). + - Functions and variables used only to interface with asm modules should + be marked with the `asmlinkage` macro. If that's not possible, consider + using the SAF-1-safe textual deviation (see safe.json). - Tagged as `safe` for ECLAIR. * - R8.6 diff --git a/xen/arch/arm/cpuerrata.c b/xen/arch/arm/cpuerrata.c index 9137958fb682..a28fa6ac78cc 100644 --- a/xen/arch/arm/cpuerrata.c +++ b/xen/arch/arm/cpuerrata.c @@ -370,10 +370,9 @@ custom_param("spec-ctrl", parse_spec_ctrl); /* Arm64 only for now as for Arm32 the workaround is currently handled in C. */ #ifdef CONFIG_ARM_64 -/* SAF-1-safe */ -void __init arm_enable_wa2_handling(const struct alt_instr *alt, - const uint32_t *origptr, - uint32_t *updptr, int nr_inst) +void asmlinkage __init arm_enable_wa2_handling(const struct alt_instr *alt, + const uint32_t *origptr, + uint32_t *updptr, int nr_inst) { BUG_ON(nr_inst != 1); diff --git a/xen/arch/arm/setup.c b/xen/arch/arm/setup.c index 3f3a45719ccb..bedbce3c0d37 100644 --- a/xen/arch/arm/setup.c +++ b/xen/arch/arm/setup.c @@ -1077,9 +1077,8 @@ static bool __init is_dom0less_mode(void) size_t __read_mostly dcache_line_bytes; /* C entry point for boot CPU */ -/* SAF-1-safe */ -void __init start_xen(unsigned long boot_phys_offset, - unsigned long fdt_paddr) +void asmlinkage __init start_xen(unsigned long boot_phys_offset, + unsigned long fdt_paddr) { size_t fdt_size; const char *cmdline; diff --git a/xen/arch/arm/smpboot.c b/xen/arch/arm/smpboot.c index ec76de3cac12..a32f610b47d9 100644 --- a/xen/arch/arm/smpboot.c +++ b/xen/arch/arm/smpboot.c @@ -303,8 +303,7 @@ smp_prepare_cpus(void) } /* Boot the current CPU */ -/* SAF-1-safe */ -void start_secondary(void) +void asmlinkage start_secondary(void) { unsigned int cpuid = init_data.cpuid; diff --git a/xen/arch/arm/traps.c b/xen/arch/arm/traps.c index 5aa14d470791..63d3bc7bd67b 100644 --- a/xen/arch/arm/traps.c +++ b/xen/arch/arm/traps.c @@ -161,8 +161,7 @@ void init_traps(void) isb(); } -/* SAF-1-safe */ -void __div0(void) +void asmlinkage __div0(void) { printk("Division by zero in hypervisor.\n"); BUG(); @@ -1955,8 +1954,7 @@ static inline bool needs_ssbd_flip(struct vcpu *v) * Actions that needs to be done after entering the hypervisor from the * guest and before the interrupts are unmasked. */ -/* SAF-1-safe */ -void enter_hypervisor_from_guest_preirq(void) +void asmlinkage enter_hypervisor_from_guest_preirq(void) { struct vcpu *v = current; @@ -1970,8 +1968,7 @@ void enter_hypervisor_from_guest_preirq(void) * guest and before we handle any request. Depending on the exception trap, * this may be called with interrupts unmasked. */ -/* SAF-1-safe */ -void enter_hypervisor_from_guest(void) +void asmlinkage enter_hypervisor_from_guest(void) { struct vcpu *v = current; @@ -1999,8 +1996,7 @@ void enter_hypervisor_from_guest(void) vgic_sync_from_lrs(v); } -/* SAF-1-safe */ -void do_trap_guest_sync(struct cpu_user_regs *regs) +void asmlinkage do_trap_guest_sync(struct cpu_user_regs *regs) { const union hsr hsr = { .bits = regs->hsr }; @@ -2195,14 +2191,12 @@ void do_trap_guest_serror(struct cpu_user_regs *regs) __do_trap_serror(regs, true); } -/* SAF-1-safe */ -void do_trap_irq(struct cpu_user_regs *regs) +void asmlinkage do_trap_irq(struct cpu_user_regs *regs) { gic_interrupt(regs, 0); } -/* SAF-1-safe */ -void do_trap_fiq(struct cpu_user_regs *regs) +void asmlinkage do_trap_fiq(struct cpu_user_regs *regs) { gic_interrupt(regs, 1); } @@ -2275,8 +2269,7 @@ static bool check_for_vcpu_work(void) * * The function will return with IRQ masked. */ -/* SAF-1-safe */ -void leave_hypervisor_to_guest(void) +void asmlinkage leave_hypervisor_to_guest(void) { local_irq_disable(); diff --git a/xen/arch/x86/boot/cmdline.c b/xen/arch/x86/boot/cmdline.c index f9eee756aaed..93c6b68ed909 100644 --- a/xen/arch/x86/boot/cmdline.c +++ b/xen/arch/x86/boot/cmdline.c @@ -31,6 +31,7 @@ asm ( ); #include <xen/kconfig.h> +#include <xen/compiler.h> #include "defs.h" #include "video.h" @@ -340,8 +341,8 @@ static void vga_parse(const char *cmdline, early_boot_opts_t *ebo) } #endif -/* SAF-1-safe */ -void __stdcall cmdline_parse_early(const char *cmdline, early_boot_opts_t *ebo) +void asmlinkage __stdcall cmdline_parse_early(const char *cmdline, + early_boot_opts_t *ebo) { if ( !cmdline ) return; diff --git a/xen/arch/x86/boot/reloc.c b/xen/arch/x86/boot/reloc.c index 609b02cb73dc..668918db879a 100644 --- a/xen/arch/x86/boot/reloc.c +++ b/xen/arch/x86/boot/reloc.c @@ -33,6 +33,8 @@ asm ( #include "../../../include/xen/kconfig.h" #include <public/arch-x86/hvm/start_info.h> +#include <xen/compiler.h> + #ifdef CONFIG_VIDEO # include "video.h" @@ -347,9 +349,8 @@ static multiboot_info_t *mbi2_reloc(uint32_t mbi_in, uint32_t video_out) return mbi_out; } -/* SAF-1-safe */ -void *__stdcall reloc(uint32_t magic, uint32_t in, uint32_t trampoline, - uint32_t video_info) +void *asmlinkage __stdcall reloc(uint32_t magic, uint32_t in, + uint32_t trampoline, uint32_t video_info) { alloc = trampoline; diff --git a/xen/arch/x86/extable.c b/xen/arch/x86/extable.c index 74b14246e9d8..51245221ec03 100644 --- a/xen/arch/x86/extable.c +++ b/xen/arch/x86/extable.c @@ -194,8 +194,7 @@ static int __init cf_check stub_selftest(void) __initcall(stub_selftest); #endif -/* SAF-1-safe */ -unsigned long search_pre_exception_table(struct cpu_user_regs *regs) +unsigned asmlinkage long search_pre_exception_table(struct cpu_user_regs *regs) { unsigned long addr = regs->rip; unsigned long fixup = search_one_extable( diff --git a/xen/arch/x86/setup.c b/xen/arch/x86/setup.c index d70ad1e44a60..958ebeeef0c3 100644 --- a/xen/arch/x86/setup.c +++ b/xen/arch/x86/setup.c @@ -970,8 +970,7 @@ static struct domain *__init create_dom0(const module_t *image, /* How much of the directmap is prebuilt at compile time. */ #define PREBUILT_MAP_LIMIT (1 << L2_PAGETABLE_SHIFT) -/* SAF-1-safe */ -void __init noreturn __start_xen(unsigned long mbi_p) +void asmlinkage __init noreturn __start_xen(unsigned long mbi_p) { const char *memmap_type = NULL; char *cmdline, *kextra, *loader; diff --git a/xen/arch/x86/traps.c b/xen/arch/x86/traps.c index 6393467b06fd..2c2e19fe8964 100644 --- a/xen/arch/x86/traps.c +++ b/xen/arch/x86/traps.c @@ -833,8 +833,7 @@ void fatal_trap(const struct cpu_user_regs *regs, bool show_remote) (regs->eflags & X86_EFLAGS_IF) ? "" : " IN INTERRUPT CONTEXT"); } -/* SAF-1-safe */ -void do_unhandled_trap(struct cpu_user_regs *regs) +void asmlinkage do_unhandled_trap(struct cpu_user_regs *regs) { unsigned int trapnr = regs->entry_vector; @@ -921,8 +920,7 @@ static bool extable_fixup(struct cpu_user_regs *regs, bool print) return true; } -/* SAF-1-safe */ -void do_trap(struct cpu_user_regs *regs) +void asmlinkage do_trap(struct cpu_user_regs *regs) { unsigned int trapnr = regs->entry_vector; @@ -1154,8 +1152,7 @@ void cpuid_hypervisor_leaves(const struct vcpu *v, uint32_t leaf, } } -/* SAF-1-safe */ -void do_invalid_op(struct cpu_user_regs *regs) +void asmlinkage do_invalid_op(struct cpu_user_regs *regs) { u8 bug_insn[2]; const void *eip = (const void *)regs->rip; @@ -1200,8 +1197,7 @@ void do_invalid_op(struct cpu_user_regs *regs) panic("FATAL TRAP: vector = %d (invalid opcode)\n", X86_EXC_UD); } -/* SAF-1-safe */ -void do_int3(struct cpu_user_regs *regs) +void asmlinkage do_int3(struct cpu_user_regs *regs) { struct vcpu *curr = current; @@ -1568,8 +1564,7 @@ static int fixup_page_fault(unsigned long addr, struct cpu_user_regs *regs) return 0; } -/* SAF-1-safe */ -void do_page_fault(struct cpu_user_regs *regs) +void asmlinkage do_page_fault(struct cpu_user_regs *regs) { unsigned long addr; unsigned int error_code; @@ -1646,8 +1641,7 @@ void do_page_fault(struct cpu_user_regs *regs) * during early boot (an issue was seen once, but was most likely a hardware * problem). */ -/* SAF-1-safe */ -void __init do_early_page_fault(struct cpu_user_regs *regs) +void asmlinkage __init do_early_page_fault(struct cpu_user_regs *regs) { static unsigned int __initdata stuck; static unsigned long __initdata prev_eip, prev_cr2; @@ -1847,8 +1841,7 @@ void trigger_nmi_continuation(void) apic_wait_icr_idle(); } -/* SAF-1-safe */ -void do_device_not_available(struct cpu_user_regs *regs) +void asmlinkage do_device_not_available(struct cpu_user_regs *regs) { #ifdef CONFIG_PV struct vcpu *curr = current; @@ -1884,8 +1877,7 @@ void do_device_not_available(struct cpu_user_regs *regs) #endif } -/* SAF-1-safe */ -void do_debug(struct cpu_user_regs *regs) +void asmlinkage do_debug(struct cpu_user_regs *regs) { unsigned long dr6; struct vcpu *v = current; @@ -2010,8 +2002,7 @@ void do_debug(struct cpu_user_regs *regs) pv_inject_hw_exception(X86_EXC_DB, X86_EVENT_NO_EC); } -/* SAF-1-safe */ -void do_entry_CP(struct cpu_user_regs *regs) +void asmlinkage do_entry_CP(struct cpu_user_regs *regs) { static const char errors[][10] = { [1] = "near ret", diff --git a/xen/common/efi/boot.c b/xen/common/efi/boot.c index e5e86f22b2b2..bc58dfce2f6c 100644 --- a/xen/common/efi/boot.c +++ b/xen/common/efi/boot.c @@ -1254,9 +1254,8 @@ static void __init efi_exit_boot(EFI_HANDLE ImageHandle, EFI_SYSTEM_TABLE *Syste efi_fw_vendor = (void *)efi_fw_vendor + DIRECTMAP_VIRT_START; } -/* SAF-1-safe */ -void EFIAPI __init noreturn efi_start(EFI_HANDLE ImageHandle, - EFI_SYSTEM_TABLE *SystemTable) +void asmlinkage EFIAPI __init noreturn efi_start(EFI_HANDLE ImageHandle, + EFI_SYSTEM_TABLE *SystemTable) { static EFI_GUID __initdata loaded_image_guid = LOADED_IMAGE_PROTOCOL; static EFI_GUID __initdata shim_lock_guid = SHIM_LOCK_PROTOCOL_GUID; -- 2.34.1

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