search for: trap_init

Hello, I am a newbie at xen - I am trying to trace the complete execution of a trap. Specifically, I am trying to find out where the control transfer happens between a domU to dom0 when a trap occurs, and where the control switches back to domU after the trap is handled. I was wondering if there is some documentation on this or someone may be able to help me out. Thanks, Girish

...dif diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c index 1905ce9..7170024 100644 --- a/arch/x86/kernel/cpu/intel.c +++ b/arch/x86/kernel/cpu/intel.c @@ -164,20 +164,6 @@ int __cpuinit ppro_with_ram_bug(void) return 0; } -#ifdef CONFIG_X86_F00F_BUG -static void __cpuinit trap_init_f00f_bug(void) -{ - __set_fixmap(FIX_F00F_IDT, __pa_symbol(idt_table), PAGE_KERNEL_RO); - - /* - * Update the IDT descriptor and reload the IDT so that - * it uses the read-only mapped virtual address. - */ - idt_descr.address = fix_to_virt(FIX_F00F_IDT); - load_idt(&idt_descr); -} -#endif -...

...dif diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c index 1905ce9..7170024 100644 --- a/arch/x86/kernel/cpu/intel.c +++ b/arch/x86/kernel/cpu/intel.c @@ -164,20 +164,6 @@ int __cpuinit ppro_with_ram_bug(void) return 0; } -#ifdef CONFIG_X86_F00F_BUG -static void __cpuinit trap_init_f00f_bug(void) -{ - __set_fixmap(FIX_F00F_IDT, __pa_symbol(idt_table), PAGE_KERNEL_RO); - - /* - * Update the IDT descriptor and reload the IDT so that - * it uses the read-only mapped virtual address. - */ - idt_descr.address = fix_to_virt(FIX_F00F_IDT); - load_idt(&idt_descr); -} -#endif -...

...ure is like the following: > > __alloc_pages_slowpath > __alloc_pages_nodemask > alloc_pages_current > alloc_pages > split_large_page > __change_page_attr > __change_page_attr_set_clr > __set_memory_enc_dec > set_memory_decrypted > sev_es_init_ghcbs > trap_init -> before mm_init (in init/main.c) > start_kernel > x86_64_start_reservations > x86_64_start_kernel > secondary_startup_64 > > At this time, mem_init hasn't been called yet (which would be called by > mm_init). Thus, the free pages are still owned by memblock. It&...

...xen/gdbstub.h> #include <xen/percpu.h> #include <xen/hypercall.h> +#include <xen/keyhandler.h> #include <public/version.h> #include <asm/bitops.h> #include <asm/smp.h> @@ -81,7 +81,6 @@ extern void init_IRQ(void); extern void init_IRQ(void); extern void trap_init(void); extern void early_time_init(void); -extern void initialize_keytable(void); extern void early_cpu_init(void); struct tss_struct init_tss[NR_CPUS]; diff -r 010ae57673c7 -r 47e5627d8558 xen/include/xen/keyhandler.h --- a/xen/include/xen/keyhandler.h Wed Sep 20 21:47:29 2006 -0400 +++ b/xen...

Good morning, I am new to Xen, and trying to understand how Xen works. I have some questions about virtualization of interrupts on Xen. Thanks in advance for all helps. 1) From papers about Xen architecture found at Xen homepage, Xen seemingly intercepts interrupts of Dom1 (paravirtualization). So interrupts occur in Dom1''s context are sent to Xen, and Xen handles them. Is that correct?

...tatic void __init early_forward_exception(struct es_em_ctxt *ctxt) { int trapnr = ctxt->fi.vector; diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c index 6ef00eb6fbb9..9c9a7fae36d3 100644 --- a/arch/x86/kernel/traps.c +++ b/arch/x86/kernel/traps.c @@ -918,6 +918,9 @@ void __init trap_init(void) /* Init cpu_entry_area before IST entries are set up */ setup_cpu_entry_areas(); + /* Init GHCB memory pages when running as an SEV-ES guest */ + encrypted_state_init_ghcbs(); + idt_setup_traps(); /* -- 2.17.1

...void __init vc_early_forward_exception(struct es_em_ctxt *ctxt) { int trapnr = ctxt->fi.vector; diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c index df9c6554f83e..e121e7c5f831 100644 --- a/arch/x86/kernel/traps.c +++ b/arch/x86/kernel/traps.c @@ -1082,6 +1082,9 @@ void __init trap_init(void) /* Init cpu_entry_area before IST entries are set up */ setup_cpu_entry_areas(); + /* Init GHCB memory pages when running as an SEV-ES guest */ + sev_es_init_vc_handling(); + idt_setup_traps(); /* -- 2.28.0

...void __init vc_early_vc_forward_exception(struct es_em_ctxt *ctxt) { int trapnr = ctxt->fi.vector; diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c index d54cffdc7cac..411928c38cd7 100644 --- a/arch/x86/kernel/traps.c +++ b/arch/x86/kernel/traps.c @@ -965,6 +965,9 @@ void __init trap_init(void) /* Init cpu_entry_area before IST entries are set up */ setup_cpu_entry_areas(); + /* Init GHCB memory pages when running as an SEV-ES guest */ + sev_es_init_vc_handling(); + idt_setup_traps(); /* -- 2.17.1

...dif diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c index 1905ce9..76148a3 100644 --- a/arch/x86/kernel/cpu/intel.c +++ b/arch/x86/kernel/cpu/intel.c @@ -164,20 +164,6 @@ int __cpuinit ppro_with_ram_bug(void) return 0; } -#ifdef CONFIG_X86_F00F_BUG -static void __cpuinit trap_init_f00f_bug(void) -{ - __set_fixmap(FIX_F00F_IDT, __pa_symbol(idt_table), PAGE_KERNEL_RO); - - /* - * Update the IDT descriptor and reload the IDT so that - * it uses the read-only mapped virtual address. - */ - idt_descr.address = fix_to_virt(FIX_F00F_IDT); - load_idt(&idt_descr); -} -#endif -...

...dif diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c index 1905ce9..76148a3 100644 --- a/arch/x86/kernel/cpu/intel.c +++ b/arch/x86/kernel/cpu/intel.c @@ -164,20 +164,6 @@ int __cpuinit ppro_with_ram_bug(void) return 0; } -#ifdef CONFIG_X86_F00F_BUG -static void __cpuinit trap_init_f00f_bug(void) -{ - __set_fixmap(FIX_F00F_IDT, __pa_symbol(idt_table), PAGE_KERNEL_RO); - - /* - * Update the IDT descriptor and reload the IDT so that - * it uses the read-only mapped virtual address. - */ - idt_descr.address = fix_to_virt(FIX_F00F_IDT); - load_idt(&idt_descr); -} -#endif -...

...dif diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c index 1905ce9..7170024 100644 --- a/arch/x86/kernel/cpu/intel.c +++ b/arch/x86/kernel/cpu/intel.c @@ -164,20 +164,6 @@ int __cpuinit ppro_with_ram_bug(void) return 0; } -#ifdef CONFIG_X86_F00F_BUG -static void __cpuinit trap_init_f00f_bug(void) -{ - __set_fixmap(FIX_F00F_IDT, __pa_symbol(idt_table), PAGE_KERNEL_RO); - - /* - * Update the IDT descriptor and reload the IDT so that - * it uses the read-only mapped virtual address. - */ - idt_descr.address = fix_to_virt(FIX_F00F_IDT); - load_idt(&idt_descr); -} -#endif -...

...dif diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c index 1905ce9..7170024 100644 --- a/arch/x86/kernel/cpu/intel.c +++ b/arch/x86/kernel/cpu/intel.c @@ -164,20 +164,6 @@ int __cpuinit ppro_with_ram_bug(void) return 0; } -#ifdef CONFIG_X86_F00F_BUG -static void __cpuinit trap_init_f00f_bug(void) -{ - __set_fixmap(FIX_F00F_IDT, __pa_symbol(idt_table), PAGE_KERNEL_RO); - - /* - * Update the IDT descriptor and reload the IDT so that - * it uses the read-only mapped virtual address. - */ - idt_descr.address = fix_to_virt(FIX_F00F_IDT); - load_idt(&idt_descr); -} -#endif -...

...otypes] > arch/x86/kernel/traps.c:625:46: warning: no previous prototype for ?sync_regs? [-Wmissing-prototypes] > arch/x86/kernel/traps.c:640:24: warning: no previous prototype for ?fixup_bad_iret? [-Wmissing-prototypes] > arch/x86/kernel/traps.c:929:13: warning: no previous prototype for ?trap_init? [-Wmissing-prototypes] > arch/x86/kernel/irq.c:270:28: warning: no previous prototype for ?smp_x86_platform_ipi? [-Wmissing-prototypes] > arch/x86/kernel/irq.c:301:16: warning: no previous prototype for ?smp_kvm_posted_intr_ipi? [-Wmissing-prototypes] > arch/x86/kernel/irq.c:314:16: warni...

Hi, This series corresponds do older patches in the paravirt series that was neither already applied, nor I will touch again. In general, they do not touch code that can be unified (at least, without being the unification a big problem on its own). They passed through this list a lot of times, so I feel them ready for inclusion, unless someone opposes. As with the other patches, they apply to

Hi, This series corresponds do older patches in the paravirt series that was neither already applied, nor I will touch again. In general, they do not touch code that can be unified (at least, without being the unification a big problem on its own). They passed through this list a lot of times, so I feel them ready for inclusion, unless someone opposes. As with the other patches, they apply to

...rnel/traps.c Wed Nov 12 11:09:56 1997 @@ -413,6 +413,51 @@ #endif /* CONFIG_MATH_EMULATION */ +static struct +{ + short limit __attribute__((packed)); + void * addr __attribute__((packed)); + short __pad __attribute__((packed)); +} idt_d; + +void * idt2; + +__initfunc(void trap_init_f00f_bug(void)) +{ + pgd_t * pgd; + pmd_t * pmd; + pte_t * pte; + unsigned long twopage; + + printk("moving IDT ... "); + + twopage = (unsigned long) vmalloc (2*PAGE_SIZE); + + idt2 = (void *)(twopage + 4096-7*8); + + memcpy(idt2,&idt,si...

...29..1b86bb3abc56 100644 --- a/arch/x86/include/asm/traps.h +++ b/arch/x86/include/asm/traps.h @@ -15,6 +15,7 @@ asmlinkage __visible notrace struct pt_regs *sync_regs(struct pt_regs *eregs); asmlinkage __visible notrace struct bad_iret_stack *fixup_bad_iret(struct bad_iret_stack *s); void __init trap_init(void); +asmlinkage __visible noinstr struct pt_regs *vc_switch_off_ist(struct pt_regs *eregs); #endif #ifdef CONFIG_X86_F00F_BUG diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c index 030d882eaad1..e592c10d25f8 100644 --- a/arch/x86/kernel/traps.c +++ b/arch/x86/kernel/traps.c @@...

...============== --- clean-start.orig/arch/x86_64/kernel/traps.c +++ clean-start/arch/x86_64/kernel/traps.c @@ -1067,6 +1067,7 @@ asmlinkage void math_state_restore(void) task_thread_info(me)->status |= TS_USEDFPU; me->fpu_counter++; } +EXPORT_SYMBOL_GPL(math_state_restore); void __init trap_init(void) { Index: clean-start/include/asm-x86_64/irq.h =================================================================== --- clean-start.orig/include/asm-x86_64/irq.h +++ clean-start/include/asm-x86_64/irq.h @@ -46,6 +46,9 @@ static __inline__ int irq_canonicalize(i extern void fixup_irqs(cpumask_...

...============== --- clean-start.orig/arch/x86_64/kernel/traps.c +++ clean-start/arch/x86_64/kernel/traps.c @@ -1067,6 +1067,7 @@ asmlinkage void math_state_restore(void) task_thread_info(me)->status |= TS_USEDFPU; me->fpu_counter++; } +EXPORT_SYMBOL_GPL(math_state_restore); void __init trap_init(void) { Index: clean-start/include/asm-x86_64/irq.h =================================================================== --- clean-start.orig/include/asm-x86_64/irq.h +++ clean-start/include/asm-x86_64/irq.h @@ -46,6 +46,9 @@ static __inline__ int irq_canonicalize(i extern void fixup_irqs(cpumask_...