search for: set_intr_gate

From: Joerg Roedel <jroedel at suse.de> The code to setup idt_data is needed for early exception handling, but set_intr_gate() can't be used that early because it has pv-ops in its code path, which don't work that early. Split out the idt_data initialization part from set_intr_gate() so that it can be used separatly. Signed-off-by: Joerg Roedel <jroedel at suse.de> --- arch/x86/kernel/idt.c | 22 ++++++++...

From: Joerg Roedel <jroedel at suse.de> The code to setup idt_data is needed for early exception handling, but set_intr_gate() can't be used that early because it has pv-ops in its code path, which don't work that early. Split out the idt_data initialization part from set_intr_gate() so that it can be used separatly. Signed-off-by: Joerg Roedel <jroedel at suse.de> Reviewed-by: Kees Cook <keescook at c...

...iff -r 0268e7380953 -r c7884dbb6f7d xen/arch/x86/smpboot.c --- a/xen/arch/x86/smpboot.c Mon Sep 05 15:10:28 2011 +0100 +++ b/xen/arch/x86/smpboot.c Wed Sep 07 16:00:55 2011 +0100 @@ -1027,7 +1027,7 @@ void __init smp_intr_init(void) } /* IPI for cleanuping vectors after irq move */ - set_intr_gate(IRQ_MOVE_CLEANUP_VECTOR, irq_move_cleanup_interrupt); + set_intr_gate(MOVE_CLEANUP_VECTOR, irq_move_cleanup_interrupt); /* IPI for event checking. */ set_intr_gate(EVENT_CHECK_VECTOR, event_check_interrupt); diff -r 0268e7380953 -r c7884dbb6f7d xen/include/asm-x86/mach-default/irq_ve...

...cify an interrupt vector in LWP_CFG MSR; the interrupt will be triggered when event buffer overflows. For HVM guests, I want to re-inject this interrupt back into the guest VM. Here is one idea similar to virtualized PMU: It first registers a special interrupt handler (say on vector 0xf6) using set_intr_gate(). When triggered, this handler injects an IRQ (with vector copied from LWP_CFG) into guest VM via virtual local APIC. This worked from my test. But adding a interrupt handler seems to be an overkill. Is there any better way to create a dummy interrupt receiver on be-behalf of guest VMs? I als...

On Mon, Aug 24, 2020 at 10:54:31AM +0200, Joerg Roedel wrote: > @@ -385,3 +386,25 @@ void __init alloc_intr_gate(unsigned int n, const void *addr) > if (!WARN_ON(test_and_set_bit(n, system_vectors))) > set_intr_gate(n, addr); > } > + > +void __init early_idt_setup_early_handler(unsigned long physaddr) I wonder if you could drop one of the "early"es: idt_setup_early_handler() for example looks ok to me. Or early_setup_idt_handler() if you wanna have "early" as prefix... -- R...

...(dpl<<13)+(type<<8))), \ - "3" ((char *) (addr)),"2" ((seg) << 16)); \ -} while (0) - - /* * This needs to use 'idt_table' rather than 'idt', and * thus use the _nonmapped_ version of the IDT, as the @@ -1065,7 +1051,7 @@ do { \ */ void set_intr_gate(unsigned int n, void *addr) { - _set_gate(idt_table+n,14,0,addr,__KERNEL_CS); + _set_gate(n, DESCTYPE_INT, addr, __KERNEL_CS); } /* @@ -1073,22 +1059,22 @@ void set_intr_gate(unsigned int n, void */ static inline void set_system_intr_gate(unsigned int n, void *addr) { - _set_gate(idt_tabl...

...(dpl<<13)+(type<<8))), \ - "3" ((char *) (addr)),"2" ((seg) << 16)); \ -} while (0) - - /* * This needs to use 'idt_table' rather than 'idt', and * thus use the _nonmapped_ version of the IDT, as the @@ -1065,7 +1051,7 @@ do { \ */ void set_intr_gate(unsigned int n, void *addr) { - _set_gate(idt_table+n,14,0,addr,__KERNEL_CS); + _set_gate(n, DESCTYPE_INT, addr, __KERNEL_CS); } /* @@ -1073,22 +1059,22 @@ void set_intr_gate(unsigned int n, void */ static inline void set_system_intr_gate(unsigned int n, void *addr) { - _set_gate(idt_tabl...

...struct ts->tv_sec = wallclock; } -static void update_xtime_from_wallclock(void) -{ - struct timespec ts; - vmi_get_wallclock_ts(&ts); - do_settimeofday(&ts); -} - unsigned long vmi_get_wallclock(void) { struct timespec ts; @@ -197,18 +190,10 @@ void __init vmi_time_init(void) set_intr_gate(LOCAL_TIMER_VECTOR, apic_vmi_timer_interrupt); #endif - no_sync_cmos_clock = 1; - - vmi_get_wallclock_ts(&xtime); - set_normalized_timespec(&wall_to_monotonic, - -xtime.tv_sec, -xtime.tv_nsec); - real_cycles_accounted_system = read_real_cycles(); - update_xtime_from_wallclock(); per...

...e_idt(dtr) asm ("sidtl %0":"=m" (*dtr)) +#define store_tr(tr) asm ("str %0":"=mr" (tr)) +#define store_ldt(ldt) asm ("sldt %0":"=mr" (ldt)) /* * This is the ldt that every process will get unless we need @@ -52,7 +52,7 @@ extern void set_intr_gate(unsigned int irq, void * addr); #define _set_tssldt_desc(n,addr,limit,type) \ -__asm__ __volatile__ ("movw %w3,0(%2)\n\t" \ +asm volatile ("movw %w3,0(%2)\n\t" \ "movw %w1,2(%2)\n\t" \ "rorl $16,%1\n\t" \ "movb %b1,4(%2)\n\t" \

...================================================================= --- linux-2.6.13.orig/include/asm-i386/desc.h 2005-08-08 15:41:11.000000000 -0700 +++ linux-2.6.13/include/asm-i386/desc.h 2005-08-08 15:47:01.000000000 -0700 @@ -51,17 +51,21 @@ extern struct desc_struct default_ldt[]; extern void set_intr_gate(unsigned int irq, void * addr); -#define _set_tssldt_desc(n,addr,limit,type) \ -asm volatile ("movw %w3,0(%2)\n\t" \ - "movw %w1,2(%2)\n\t" \ - "rorl $16,%1\n\t" \ - "movb %b1,4(%2)\n\t" \ - "movb %4,5(%2)\n\t" \ - "movb $0,6(%2)\n\t" \...

...================================================================= --- linux-2.6.13.orig/include/asm-i386/desc.h 2005-08-09 18:59:10.000000000 -0700 +++ linux-2.6.13/include/asm-i386/desc.h 2005-08-10 20:42:20.000000000 -0700 @@ -34,17 +34,21 @@ extern struct desc_struct default_ldt[]; extern void set_intr_gate(unsigned int irq, void * addr); -#define _set_tssldt_desc(n,addr,limit,type) \ -__asm__ __volatile__ ("movw %w3,0(%2)\n\t" \ - "movw %w1,2(%2)\n\t" \ - "rorl $16,%1\n\t" \ - "movb %b1,4(%2)\n\t" \ - "movb %4,5(%2)\n\t" \ - "movb $0,6(%2)\n\t&...

...e_idt(dtr) asm ("sidtl %0":"=m" (*dtr)) +#define store_tr(tr) asm ("str %0":"=mr" (tr)) +#define store_ldt(ldt) asm ("sldt %0":"=mr" (ldt)) /* * This is the ldt that every process will get unless we need @@ -52,7 +52,7 @@ extern void set_intr_gate(unsigned int irq, void * addr); #define _set_tssldt_desc(n,addr,limit,type) \ -__asm__ __volatile__ ("movw %w3,0(%2)\n\t" \ +asm volatile ("movw %w3,0(%2)\n\t" \ "movw %w1,2(%2)\n\t" \ "rorl $16,%1\n\t" \ "movb %b1,4(%2)\n\t" \

...================================================================= --- linux-2.6.13.orig/include/asm-i386/desc.h 2005-08-08 15:41:11.000000000 -0700 +++ linux-2.6.13/include/asm-i386/desc.h 2005-08-08 15:47:01.000000000 -0700 @@ -51,17 +51,21 @@ extern struct desc_struct default_ldt[]; extern void set_intr_gate(unsigned int irq, void * addr); -#define _set_tssldt_desc(n,addr,limit,type) \ -asm volatile ("movw %w3,0(%2)\n\t" \ - "movw %w1,2(%2)\n\t" \ - "rorl $16,%1\n\t" \ - "movb %b1,4(%2)\n\t" \ - "movb %4,5(%2)\n\t" \ - "movb $0,6(%2)\n\t" \...

...================================================================= --- linux-2.6.13.orig/include/asm-i386/desc.h 2005-08-09 18:59:10.000000000 -0700 +++ linux-2.6.13/include/asm-i386/desc.h 2005-08-10 20:42:20.000000000 -0700 @@ -34,17 +34,21 @@ extern struct desc_struct default_ldt[]; extern void set_intr_gate(unsigned int irq, void * addr); -#define _set_tssldt_desc(n,addr,limit,type) \ -__asm__ __volatile__ ("movw %w3,0(%2)\n\t" \ - "movw %w1,2(%2)\n\t" \ - "rorl $16,%1\n\t" \ - "movb %b1,4(%2)\n\t" \ - "movb %4,5(%2)\n\t" \ - "movb $0,6(%2)\n\t&...

...struct ts->tv_sec = wallclock; } -static void update_xtime_from_wallclock(void) -{ - struct timespec ts; - vmi_get_wallclock_ts(&ts); - do_settimeofday(&ts); -} - unsigned long vmi_get_wallclock(void) { struct timespec ts; @@ -197,18 +190,10 @@ void __init vmi_time_init(void) set_intr_gate(LOCAL_TIMER_VECTOR, apic_vmi_timer_interrupt); #endif - no_sync_cmos_clock = 1; - - vmi_get_wallclock_ts(&xtime); - set_normalized_timespec(&wall_to_monotonic, - -xtime.tv_sec, -xtime.tv_nsec); - real_cycles_accounted_system = read_real_cycles(); - update_xtime_from_wallclock(); per...

(Andrew, please sit these in the -mm tree for cooking) Create a paravirt.h header for (almost) all the critical operations which need to be replaced with hypervisor calls. For the moment, this simply includes no_paravirt.h, where all the native implementations now live. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Zachary Amsden <zach@vmware.com>

(Andrew, please sit these in the -mm tree for cooking) Create a paravirt.h header for (almost) all the critical operations which need to be replaced with hypervisor calls. For the moment, this simply includes no_paravirt.h, where all the native implementations now live. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Zachary Amsden <zach@vmware.com>

...nclude <asm/proto.h> #include <asm/desc.h> #include <asm/hw_irq.h> +#include <asm/setup.h> struct idt_data { unsigned int vector; @@ -385,3 +386,25 @@ void __init alloc_intr_gate(unsigned int n, const void *addr) if (!WARN_ON(test_and_set_bit(n, system_vectors))) set_intr_gate(n, addr); } + +void __init early_idt_setup_early_handler(unsigned long physaddr) +{ + gate_desc *idt; + int i; + + idt = fixup_pointer(idt_table, physaddr); + + for (i = 0; i < NUM_EXCEPTION_VECTORS; i++) { + struct idt_data data; + gate_desc desc; + + init_idt_data(&data, i, early_idt_h...

...t_data(struct idt_data *data, unsigned int n, - const void *addr) -{ - BUG_ON(n > 0xFF); - - memset(data, 0, sizeof(*data)); - data->vector = n; - data->addr = addr; - data->segment = __KERNEL_CS; - data->bits.type = GATE_INTERRUPT; - data->bits.p = 1; -} - static __init void set_intr_gate(unsigned int n, const void *addr) { struct idt_data data; -- 2.27.0

...t native_init_IRQ(void) { int i; - /* all the set up before the call gates are initialised */ - pre_intr_init_hook(); - /* * Cover the whole vector space, no vector can escape * us. (some of these will be overridden and become @@ -398,10 +406,16 @@ void __init native_init_IRQ(void) set_intr_gate(vector, interrupt[i]); } - /* setup after call gates are initialised (usually add in - * the architecture specific gates) + /* + * setup after interrupt gates are initialised (usually add in + * the architecture specific gates) and initialize controllers */ intr_init_hook(); +#ifdef CON...