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[PATCH v4 7/8] x86/APIC: drop regs parameter from direct vector handler functions


  • To: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
  • From: Jan Beulich <jbeulich@xxxxxxxx>
  • Date: Tue, 20 Feb 2024 09:56:27 +0100
  • Autocrypt: addr=jbeulich@xxxxxxxx; keydata= xsDiBFk3nEQRBADAEaSw6zC/EJkiwGPXbWtPxl2xCdSoeepS07jW8UgcHNurfHvUzogEq5xk hu507c3BarVjyWCJOylMNR98Yd8VqD9UfmX0Hb8/BrA+Hl6/DB/eqGptrf4BSRwcZQM32aZK 7Pj2XbGWIUrZrd70x1eAP9QE3P79Y2oLrsCgbZJfEwCgvz9JjGmQqQkRiTVzlZVCJYcyGGsD /0tbFCzD2h20ahe8rC1gbb3K3qk+LpBtvjBu1RY9drYk0NymiGbJWZgab6t1jM7sk2vuf0Py O9Hf9XBmK0uE9IgMaiCpc32XV9oASz6UJebwkX+zF2jG5I1BfnO9g7KlotcA/v5ClMjgo6Gl MDY4HxoSRu3i1cqqSDtVlt+AOVBJBACrZcnHAUSuCXBPy0jOlBhxPqRWv6ND4c9PH1xjQ3NP nxJuMBS8rnNg22uyfAgmBKNLpLgAGVRMZGaGoJObGf72s6TeIqKJo/LtggAS9qAUiuKVnygo 3wjfkS9A3DRO+SpU7JqWdsveeIQyeyEJ/8PTowmSQLakF+3fote9ybzd880fSmFuIEJldWxp Y2ggPGpiZXVsaWNoQHN1c2UuY29tPsJgBBMRAgAgBQJZN5xEAhsDBgsJCAcDAgQVAggDBBYC AwECHgECF4AACgkQoDSui/t3IH4J+wCfQ5jHdEjCRHj23O/5ttg9r9OIruwAn3103WUITZee e7Sbg12UgcQ5lv7SzsFNBFk3nEQQCACCuTjCjFOUdi5Nm244F+78kLghRcin/awv+IrTcIWF hUpSs1Y91iQQ7KItirz5uwCPlwejSJDQJLIS+QtJHaXDXeV6NI0Uef1hP20+y8qydDiVkv6l IreXjTb7DvksRgJNvCkWtYnlS3mYvQ9NzS9PhyALWbXnH6sIJd2O9lKS1Mrfq+y0IXCP10eS FFGg+Av3IQeFatkJAyju0PPthyTqxSI4lZYuJVPknzgaeuJv/2NccrPvmeDg6Coe7ZIeQ8Yj t0ARxu2xytAkkLCel1Lz1WLmwLstV30g80nkgZf/wr+/BXJW/oIvRlonUkxv+IbBM3dX2OV8 AmRv1ySWPTP7AAMFB/9PQK/VtlNUJvg8GXj9ootzrteGfVZVVT4XBJkfwBcpC/XcPzldjv+3 HYudvpdNK3lLujXeA5fLOH+Z/G9WBc5pFVSMocI71I8bT8lIAzreg0WvkWg5V2WZsUMlnDL9 mpwIGFhlbM3gfDMs7MPMu8YQRFVdUvtSpaAs8OFfGQ0ia3LGZcjA6Ik2+xcqscEJzNH+qh8V m5jjp28yZgaqTaRbg3M/+MTbMpicpZuqF4rnB0AQD12/3BNWDR6bmh+EkYSMcEIpQmBM51qM EKYTQGybRCjpnKHGOxG0rfFY1085mBDZCH5Kx0cl0HVJuQKC+dV2ZY5AqjcKwAxpE75MLFkr wkkEGBECAAkFAlk3nEQCGwwACgkQoDSui/t3IH7nnwCfcJWUDUFKdCsBH/E5d+0ZnMQi+G0A nAuWpQkjM1ASeQwSHEeAWPgskBQL
  • Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, George Dunlap <george.dunlap@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>
  • Delivery-date: Tue, 20 Feb 2024 08:56:31 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

The only place it was needed is in the spurious handler, and there we
can use get_irq_regs() instead.

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

--- a/xen/arch/x86/apic.c
+++ b/xen/arch/x86/apic.c
@@ -1322,7 +1322,7 @@ int reprogram_timer(s_time_t timeout)
     return apic_tmict || !timeout;
 }
 
-static void cf_check apic_timer_interrupt(struct cpu_user_regs *regs)
+static void cf_check apic_timer_interrupt(void)
 {
     ack_APIC_irq();
     perfc_incr(apic_timer);
@@ -1341,7 +1341,7 @@ void smp_send_state_dump(unsigned int cp
 /*
  * Spurious interrupts should _never_ happen with our APIC/SMP architecture.
  */
-static void cf_check spurious_interrupt(struct cpu_user_regs *regs)
+static void cf_check spurious_interrupt(void)
 {
     /*
      * Check if this is a vectored interrupt (most likely, as this is probably
@@ -1355,7 +1355,7 @@ static void cf_check spurious_interrupt(
         is_spurious = !nmi_check_continuation();
         if (this_cpu(state_dump_pending)) {
             this_cpu(state_dump_pending) = false;
-            dump_execstate(regs);
+            dump_execstate(get_irq_regs());
             is_spurious = false;
         }
 
@@ -1372,7 +1372,7 @@ static void cf_check spurious_interrupt(
  * This interrupt should never happen with our APIC/SMP architecture
  */
 
-static void cf_check error_interrupt(struct cpu_user_regs *regs)
+static void cf_check error_interrupt(void)
 {
     static const char *const esr_fields[] = {
         ", Send CS error",
@@ -1407,7 +1407,7 @@ static void cf_check error_interrupt(str
  * This interrupt handles performance counters interrupt
  */
 
-static void cf_check pmu_interrupt(struct cpu_user_regs *regs)
+static void cf_check pmu_interrupt(void)
 {
     ack_APIC_irq();
     vpmu_do_interrupt();
--- a/xen/arch/x86/cpu/mcheck/mce_intel.c
+++ b/xen/arch/x86/cpu/mcheck/mce_intel.c
@@ -58,7 +58,7 @@ bool __read_mostly lmce_support;
 #define MCE_RING                0x1
 static DEFINE_PER_CPU(int, last_state);
 
-static void cf_check intel_thermal_interrupt(struct cpu_user_regs *regs)
+static void cf_check intel_thermal_interrupt(void)
 {
     uint64_t msr_content;
     unsigned int cpu = smp_processor_id();
@@ -642,7 +642,7 @@ static void cpu_mcheck_disable(void)
         clear_cmci();
 }
 
-static void cf_check cmci_interrupt(struct cpu_user_regs *regs)
+static void cf_check cmci_interrupt(void)
 {
     mctelem_cookie_t mctc;
     struct mca_summary bs;
--- a/xen/arch/x86/guest/xen/xen.c
+++ b/xen/arch/x86/guest/xen/xen.c
@@ -158,7 +158,7 @@ static void __init init_memmap(void)
     }
 }
 
-static void cf_check xen_evtchn_upcall(struct cpu_user_regs *regs)
+static void cf_check xen_evtchn_upcall(void)
 {
     struct vcpu_info *vcpu_info = this_cpu(vcpu_info);
     unsigned long pending;
--- a/xen/arch/x86/hvm/vmx/vmx.c
+++ b/xen/arch/x86/hvm/vmx/vmx.c
@@ -2782,7 +2782,7 @@ static struct hvm_function_table __initd
 };
 
 /* Handle VT-d posted-interrupt when VCPU is blocked. */
-static void cf_check pi_wakeup_interrupt(struct cpu_user_regs *regs)
+static void cf_check pi_wakeup_interrupt(void)
 {
     struct vmx_vcpu *vmx, *tmp;
     spinlock_t *lock = &per_cpu(vmx_pi_blocking, smp_processor_id()).lock;
@@ -2814,7 +2814,7 @@ static void cf_check pi_wakeup_interrupt
 }
 
 /* Handle VT-d posted-interrupt when VCPU is running. */
-static void cf_check pi_notification_interrupt(struct cpu_user_regs *regs)
+static void cf_check pi_notification_interrupt(void)
 {
     ack_APIC_irq();
     this_cpu(irq_count)++;
--- a/xen/arch/x86/include/asm/irq.h
+++ b/xen/arch/x86/include/asm/irq.h
@@ -72,17 +72,15 @@ extern int opt_irq_vector_map;
 
 #define platform_legacy_irq(irq)       ((irq) < 16)
 
-void cf_check event_check_interrupt(struct cpu_user_regs *regs);
-void cf_check invalidate_interrupt(struct cpu_user_regs *regs);
-void cf_check call_function_interrupt(struct cpu_user_regs *regs);
-void cf_check irq_move_cleanup_interrupt(struct cpu_user_regs *regs);
+void cf_check event_check_interrupt(void);
+void cf_check invalidate_interrupt(void);
+void cf_check call_function_interrupt(void);
+void cf_check irq_move_cleanup_interrupt(void);
 
 uint8_t alloc_hipriority_vector(void);
 
-void set_direct_apic_vector(
-    uint8_t vector, void (*handler)(struct cpu_user_regs *regs));
-void alloc_direct_apic_vector(
-    uint8_t *vector, void (*handler)(struct cpu_user_regs *regs));
+void set_direct_apic_vector(uint8_t vector, void (*handler)(void));
+void alloc_direct_apic_vector(uint8_t *vector, void (*handler)(void));
 
 void do_IRQ(struct cpu_user_regs *regs);
 
--- a/xen/arch/x86/irq.c
+++ b/xen/arch/x86/irq.c
@@ -743,7 +743,7 @@ void move_native_irq(struct irq_desc *de
     desc->handler->enable(desc);
 }
 
-void cf_check irq_move_cleanup_interrupt(struct cpu_user_regs *regs)
+void cf_check irq_move_cleanup_interrupt(void)
 {
     unsigned vector, me;
 
@@ -913,16 +913,14 @@ uint8_t alloc_hipriority_vector(void)
     return next++;
 }
 
-static void (*direct_apic_vector[X86_NR_VECTORS])(struct cpu_user_regs *regs);
-void set_direct_apic_vector(
-    uint8_t vector, void (*handler)(struct cpu_user_regs *regs))
+static void (*direct_apic_vector[X86_NR_VECTORS])(void);
+void set_direct_apic_vector(uint8_t vector, void (*handler)(void))
 {
     BUG_ON(direct_apic_vector[vector] != NULL);
     direct_apic_vector[vector] = handler;
 }
 
-void alloc_direct_apic_vector(
-    uint8_t *vector, void (*handler)(struct cpu_user_regs *regs))
+void alloc_direct_apic_vector(uint8_t *vector, void (*handler)(void))
 {
     static DEFINE_SPINLOCK(lock);
 
@@ -1907,7 +1905,7 @@ void do_IRQ(struct cpu_user_regs *regs)
     if ( irq < 0 )
     {
         if ( direct_apic_vector[vector] )
-            direct_apic_vector[vector](regs);
+            direct_apic_vector[vector]();
         else
         {
             const char *kind = ", LAPIC";
--- a/xen/arch/x86/smp.c
+++ b/xen/arch/x86/smp.c
@@ -245,7 +245,7 @@ static cpumask_t flush_cpumask;
 static const void *flush_va;
 static unsigned int flush_flags;
 
-void cf_check invalidate_interrupt(struct cpu_user_regs *regs)
+void cf_check invalidate_interrupt(void)
 {
     unsigned int flags = flush_flags;
     ack_APIC_irq();
@@ -387,14 +387,14 @@ void smp_send_nmi_allbutself(void)
     send_IPI_mask(&cpu_online_map, APIC_DM_NMI);
 }
 
-void cf_check event_check_interrupt(struct cpu_user_regs *regs)
+void cf_check event_check_interrupt(void)
 {
     ack_APIC_irq();
     perfc_incr(ipis);
     this_cpu(irq_count)++;
 }
 
-void cf_check call_function_interrupt(struct cpu_user_regs *regs)
+void cf_check call_function_interrupt(void)
 {
     ack_APIC_irq();
     perfc_incr(ipis);




 


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