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In the two places where it's actually needed, retrieve IRQ context if available, or else guest context. Suggested-by: Andrew Cooper Signed-off-by: Jan Beulich Reviewed-by: Julien Grall --- As an alternative to the new boolean parameter, I wonder if we couldn't special-case the idle vCPU case: It's only there where we would not have proper context retrievable via guest_cpu_user_regs(). --- v3: Re-base. v2: New. --- a/xen/common/keyhandler.c +++ b/xen/common/keyhandler.c @@ -73,12 +73,12 @@ static struct keyhandler { =20 static void cf_check keypress_action(void *unused) { - handle_keypress(keypress_key, NULL); + handle_keypress(keypress_key, true); } =20 static DECLARE_TASKLET(keypress_tasklet, keypress_action, NULL); =20 -void handle_keypress(unsigned char key, struct cpu_user_regs *regs) +void handle_keypress(unsigned char key, bool need_context) { struct keyhandler *h; =20 @@ -88,7 +88,7 @@ void handle_keypress(unsigned char key, if ( !in_irq() || h->irq_callback ) { console_start_log_everything(); - h->irq_callback ? h->irq_fn(key, regs) : h->fn(key); + h->irq_callback ? h->irq_fn(key, need_context) : h->fn(key); console_end_log_everything(); } else @@ -169,7 +169,7 @@ void cf_check dump_execstate(struct cpu_ } =20 static void cf_check dump_registers( - unsigned char key, struct cpu_user_regs *regs) + unsigned char key, bool need_context) { unsigned int cpu; =20 @@ -182,8 +182,8 @@ static void cf_check dump_registers( cpumask_copy(&dump_execstate_mask, &cpu_online_map); =20 /* Get local execution state out immediately, in case we get stuck. */ - if ( regs ) - dump_execstate(regs); + if ( !need_context ) + dump_execstate(get_irq_regs() ?: guest_cpu_user_regs()); else run_in_exception_handler(dump_execstate); =20 @@ -245,8 +245,7 @@ static void cf_check dump_hwdom_register } } =20 -static void cf_check reboot_machine( - unsigned char key, struct cpu_user_regs *regs) +static void cf_check reboot_machine(unsigned char key, bool unused) { printk("'%c' pressed -> rebooting machine\n", key); machine_restart(0); @@ -474,8 +473,7 @@ static void cf_check run_all_nonirq_keyh static DECLARE_TASKLET(run_all_keyhandlers_tasklet, run_all_nonirq_keyhandlers, NULL); =20 -static void cf_check run_all_keyhandlers( - unsigned char key, struct cpu_user_regs *regs) +static void cf_check run_all_keyhandlers(unsigned char key, bool need_cont= ext) { struct keyhandler *h; unsigned int k; @@ -491,7 +489,7 @@ static void cf_check run_all_keyhandlers if ( !h->irq_fn || !h->diagnostic || !h->irq_callback ) continue; printk("[%c: %s]\n", k, h->desc); - h->irq_fn(k, regs); + h->irq_fn(k, need_context); } =20 watchdog_enable(); @@ -500,8 +498,7 @@ static void cf_check run_all_keyhandlers tasklet_schedule(&run_all_keyhandlers_tasklet); } =20 -static void cf_check do_toggle_alt_key( - unsigned char key, struct cpu_user_regs *regs) +static void cf_check do_toggle_alt_key(unsigned char key, bool unused) { alt_key_handling =3D !alt_key_handling; printk("'%c' pressed -> using %s key handling\n", key, @@ -566,7 +563,7 @@ void keyhandler_crash_action(enum crash_ if ( *action =3D=3D '+' ) mdelay(10); else - handle_keypress(*action, NULL); + handle_keypress(*action, true); action++; } } --- a/xen/common/sysctl.c +++ b/xen/common/sysctl.c @@ -134,7 +134,7 @@ long do_sysctl(XEN_GUEST_HANDLE_PARAM(xe { if ( copy_from_guest_offset(&c, op->u.debug_keys.keys, i, 1) ) goto out; - handle_keypress(c, guest_cpu_user_regs()); + handle_keypress(c, false); } ret =3D 0; copyback =3D 0; --- a/xen/drivers/char/console.c +++ b/xen/drivers/char/console.c @@ -279,7 +279,7 @@ static int *__read_mostly upper_thresh_a static int *__read_mostly lower_thresh_adj =3D &xenlog_lower_thresh; static const char *__read_mostly thresh_adj =3D "standard"; =20 -static void cf_check do_toggle_guest(unsigned char key, struct cpu_user_re= gs *regs) +static void cf_check do_toggle_guest(unsigned char key, bool unused) { if ( upper_thresh_adj =3D=3D &xenlog_upper_thresh ) { @@ -306,13 +306,13 @@ static void do_adj_thresh(unsigned char loglvl_str(*upper_thresh_adj)); } =20 -static void cf_check do_inc_thresh(unsigned char key, struct cpu_user_regs= *regs) +static void cf_check do_inc_thresh(unsigned char key, bool unused) { ++*lower_thresh_adj; do_adj_thresh(key); } =20 -static void cf_check do_dec_thresh(unsigned char key, struct cpu_user_regs= *regs) +static void cf_check do_dec_thresh(unsigned char key, bool unused) { if ( *lower_thresh_adj ) --*lower_thresh_adj; @@ -531,7 +531,7 @@ static void __serial_rx(char c, struct c switch ( console_rx ) { case 0: - return handle_keypress(c, regs); + return handle_keypress(c, false); =20 case 1: /* --- a/xen/include/xen/keyhandler.h +++ b/xen/include/xen/keyhandler.h @@ -24,9 +24,8 @@ typedef void (keyhandler_fn_t)(unsigned * * Called in hardirq context with interrupts disabled. */ -struct cpu_user_regs; typedef void (irq_keyhandler_fn_t)(unsigned char key, - struct cpu_user_regs *regs); + bool need_context); =20 /* Initialize keytable with default handlers. */ void initialize_keytable(void); @@ -46,7 +45,7 @@ void register_irq_keyhandler(unsigned ch bool diagnostic); =20 /* Inject a keypress into the key-handling subsystem. */ -extern void handle_keypress(unsigned char key, struct cpu_user_regs *regs); +extern void handle_keypress(unsigned char key, bool need_context); =20 enum crash_reason { CRASHREASON_PANIC,