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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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xen: compile irq functions without -pg for ftrace
For some reason I managed to miss a bunch of irq-related functions which also need to be compiled without -pg when using ftrace. This patch moves them into their own file, and starts a cleanup process I've been meaning to do anyway. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: Sam Ravnborg <sam@ravnborg.org> Cc: "Alex Nixon (Intern)" <Alex.Nixon@eu.citrix.com> Cc: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Jeremy Fitzhardinge
Ingo Molnar
parent
eac4345be6
commit
0d1edf46ba
@ -2,9 +2,10 @@ ifdef CONFIG_FTRACE
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# Do not profile debug and lowlevel utilities
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CFLAGS_REMOVE_spinlock.o = -pg
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CFLAGS_REMOVE_time.o = -pg
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CFLAGS_REMOVE_irq.o = -pg
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endif
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obj-y := enlighten.o setup.o multicalls.o mmu.o \
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obj-y := enlighten.o setup.o multicalls.o mmu.o irq.o \
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time.o xen-asm_$(BITS).o grant-table.o suspend.o
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obj-$(CONFIG_SMP) += smp.o spinlock.o
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@ -30,7 +30,6 @@
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#include <xen/interface/xen.h>
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#include <xen/interface/physdev.h>
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#include <xen/interface/vcpu.h>
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#include <xen/interface/sched.h>
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#include <xen/features.h>
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#include <xen/page.h>
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#include <xen/hvc-console.h>
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@ -226,94 +225,6 @@ static unsigned long xen_get_debugreg(int reg)
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return HYPERVISOR_get_debugreg(reg);
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}
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static unsigned long xen_save_fl(void)
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{
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struct vcpu_info *vcpu;
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unsigned long flags;
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vcpu = x86_read_percpu(xen_vcpu);
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/* flag has opposite sense of mask */
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flags = !vcpu->evtchn_upcall_mask;
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/* convert to IF type flag
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-0 -> 0x00000000
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-1 -> 0xffffffff
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*/
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return (-flags) & X86_EFLAGS_IF;
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}
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static void xen_restore_fl(unsigned long flags)
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{
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struct vcpu_info *vcpu;
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/* convert from IF type flag */
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flags = !(flags & X86_EFLAGS_IF);
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/* There's a one instruction preempt window here. We need to
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make sure we're don't switch CPUs between getting the vcpu
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pointer and updating the mask. */
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preempt_disable();
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vcpu = x86_read_percpu(xen_vcpu);
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vcpu->evtchn_upcall_mask = flags;
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preempt_enable_no_resched();
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/* Doesn't matter if we get preempted here, because any
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pending event will get dealt with anyway. */
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if (flags == 0) {
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preempt_check_resched();
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barrier(); /* unmask then check (avoid races) */
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if (unlikely(vcpu->evtchn_upcall_pending))
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force_evtchn_callback();
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}
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}
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static void xen_irq_disable(void)
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{
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/* There's a one instruction preempt window here. We need to
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make sure we're don't switch CPUs between getting the vcpu
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pointer and updating the mask. */
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preempt_disable();
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x86_read_percpu(xen_vcpu)->evtchn_upcall_mask = 1;
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preempt_enable_no_resched();
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}
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static void xen_irq_enable(void)
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{
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struct vcpu_info *vcpu;
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/* We don't need to worry about being preempted here, since
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either a) interrupts are disabled, so no preemption, or b)
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the caller is confused and is trying to re-enable interrupts
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on an indeterminate processor. */
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vcpu = x86_read_percpu(xen_vcpu);
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vcpu->evtchn_upcall_mask = 0;
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/* Doesn't matter if we get preempted here, because any
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pending event will get dealt with anyway. */
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barrier(); /* unmask then check (avoid races) */
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if (unlikely(vcpu->evtchn_upcall_pending))
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force_evtchn_callback();
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}
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static void xen_safe_halt(void)
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{
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/* Blocking includes an implicit local_irq_enable(). */
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if (HYPERVISOR_sched_op(SCHEDOP_block, NULL) != 0)
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BUG();
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}
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static void xen_halt(void)
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{
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if (irqs_disabled())
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HYPERVISOR_vcpu_op(VCPUOP_down, smp_processor_id(), NULL);
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else
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xen_safe_halt();
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}
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static void xen_leave_lazy(void)
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{
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paravirt_leave_lazy(paravirt_get_lazy_mode());
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@ -1308,36 +1219,6 @@ static const struct pv_cpu_ops xen_cpu_ops __initdata = {
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},
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};
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static void __init __xen_init_IRQ(void)
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{
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#ifdef CONFIG_X86_64
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int i;
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/* Create identity vector->irq map */
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for(i = 0; i < NR_VECTORS; i++) {
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int cpu;
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for_each_possible_cpu(cpu)
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per_cpu(vector_irq, cpu)[i] = i;
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}
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#endif /* CONFIG_X86_64 */
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xen_init_IRQ();
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}
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static const struct pv_irq_ops xen_irq_ops __initdata = {
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.init_IRQ = __xen_init_IRQ,
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.save_fl = xen_save_fl,
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.restore_fl = xen_restore_fl,
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.irq_disable = xen_irq_disable,
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.irq_enable = xen_irq_enable,
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.safe_halt = xen_safe_halt,
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.halt = xen_halt,
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#ifdef CONFIG_X86_64
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.adjust_exception_frame = xen_adjust_exception_frame,
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#endif
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};
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static const struct pv_apic_ops xen_apic_ops __initdata = {
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#ifdef CONFIG_X86_LOCAL_APIC
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.apic_write = xen_apic_write,
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@ -1740,10 +1621,11 @@ asmlinkage void __init xen_start_kernel(void)
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pv_init_ops = xen_init_ops;
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pv_time_ops = xen_time_ops;
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pv_cpu_ops = xen_cpu_ops;
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pv_irq_ops = xen_irq_ops;
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pv_apic_ops = xen_apic_ops;
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pv_mmu_ops = xen_mmu_ops;
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xen_init_irq_ops();
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if (xen_feature(XENFEAT_mmu_pt_update_preserve_ad)) {
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pv_mmu_ops.ptep_modify_prot_start = xen_ptep_modify_prot_start;
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pv_mmu_ops.ptep_modify_prot_commit = xen_ptep_modify_prot_commit;
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143
arch/x86/xen/irq.c
Normal file
143
arch/x86/xen/irq.c
Normal file
@ -0,0 +1,143 @@
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#include <linux/hardirq.h>
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#include <xen/interface/xen.h>
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#include <xen/interface/sched.h>
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#include <xen/interface/vcpu.h>
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#include <asm/xen/hypercall.h>
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#include <asm/xen/hypervisor.h>
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#include "xen-ops.h"
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/*
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* Force a proper event-channel callback from Xen after clearing the
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* callback mask. We do this in a very simple manner, by making a call
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* down into Xen. The pending flag will be checked by Xen on return.
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*/
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void xen_force_evtchn_callback(void)
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{
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(void)HYPERVISOR_xen_version(0, NULL);
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}
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static void __init __xen_init_IRQ(void)
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{
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#ifdef CONFIG_X86_64
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int i;
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/* Create identity vector->irq map */
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for(i = 0; i < NR_VECTORS; i++) {
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int cpu;
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for_each_possible_cpu(cpu)
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per_cpu(vector_irq, cpu)[i] = i;
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}
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#endif /* CONFIG_X86_64 */
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xen_init_IRQ();
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}
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static unsigned long xen_save_fl(void)
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{
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struct vcpu_info *vcpu;
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unsigned long flags;
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vcpu = x86_read_percpu(xen_vcpu);
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/* flag has opposite sense of mask */
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flags = !vcpu->evtchn_upcall_mask;
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/* convert to IF type flag
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-0 -> 0x00000000
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-1 -> 0xffffffff
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*/
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return (-flags) & X86_EFLAGS_IF;
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}
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static void xen_restore_fl(unsigned long flags)
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{
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struct vcpu_info *vcpu;
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/* convert from IF type flag */
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flags = !(flags & X86_EFLAGS_IF);
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/* There's a one instruction preempt window here. We need to
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make sure we're don't switch CPUs between getting the vcpu
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pointer and updating the mask. */
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preempt_disable();
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vcpu = x86_read_percpu(xen_vcpu);
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vcpu->evtchn_upcall_mask = flags;
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preempt_enable_no_resched();
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/* Doesn't matter if we get preempted here, because any
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pending event will get dealt with anyway. */
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if (flags == 0) {
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preempt_check_resched();
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barrier(); /* unmask then check (avoid races) */
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if (unlikely(vcpu->evtchn_upcall_pending))
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xen_force_evtchn_callback();
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}
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}
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static void xen_irq_disable(void)
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{
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/* There's a one instruction preempt window here. We need to
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make sure we're don't switch CPUs between getting the vcpu
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pointer and updating the mask. */
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preempt_disable();
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x86_read_percpu(xen_vcpu)->evtchn_upcall_mask = 1;
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preempt_enable_no_resched();
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}
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static void xen_irq_enable(void)
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{
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struct vcpu_info *vcpu;
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/* We don't need to worry about being preempted here, since
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either a) interrupts are disabled, so no preemption, or b)
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the caller is confused and is trying to re-enable interrupts
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on an indeterminate processor. */
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vcpu = x86_read_percpu(xen_vcpu);
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vcpu->evtchn_upcall_mask = 0;
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/* Doesn't matter if we get preempted here, because any
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pending event will get dealt with anyway. */
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barrier(); /* unmask then check (avoid races) */
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if (unlikely(vcpu->evtchn_upcall_pending))
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xen_force_evtchn_callback();
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}
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static void xen_safe_halt(void)
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{
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/* Blocking includes an implicit local_irq_enable(). */
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if (HYPERVISOR_sched_op(SCHEDOP_block, NULL) != 0)
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BUG();
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}
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static void xen_halt(void)
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{
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if (irqs_disabled())
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HYPERVISOR_vcpu_op(VCPUOP_down, smp_processor_id(), NULL);
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else
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xen_safe_halt();
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}
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static const struct pv_irq_ops xen_irq_ops __initdata = {
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.init_IRQ = __xen_init_IRQ,
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.save_fl = xen_save_fl,
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.restore_fl = xen_restore_fl,
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.irq_disable = xen_irq_disable,
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.irq_enable = xen_irq_enable,
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.safe_halt = xen_safe_halt,
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.halt = xen_halt,
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#ifdef CONFIG_X86_64
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.adjust_exception_frame = xen_adjust_exception_frame,
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#endif
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};
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void __init xen_init_irq_ops()
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{
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pv_irq_ops = xen_irq_ops;
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}
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@ -298,7 +298,7 @@ check_events:
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push %eax
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push %ecx
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push %edx
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call force_evtchn_callback
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call xen_force_evtchn_callback
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pop %edx
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pop %ecx
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pop %eax
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@ -122,7 +122,7 @@ check_events:
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push %r9
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push %r10
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push %r11
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call force_evtchn_callback
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call xen_force_evtchn_callback
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pop %r11
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pop %r10
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pop %r9
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@ -31,6 +31,7 @@ void xen_vcpu_restore(void);
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void __init xen_build_dynamic_phys_to_machine(void);
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void xen_init_irq_ops(void);
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void xen_setup_timer(int cpu);
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void xen_setup_cpu_clockevents(void);
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unsigned long xen_tsc_khz(void);
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@ -84,17 +84,6 @@ static int irq_bindcount[NR_IRQS];
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/* Xen will never allocate port zero for any purpose. */
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#define VALID_EVTCHN(chn) ((chn) != 0)
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/*
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* Force a proper event-channel callback from Xen after clearing the
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* callback mask. We do this in a very simple manner, by making a call
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* down into Xen. The pending flag will be checked by Xen on return.
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*/
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void force_evtchn_callback(void)
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{
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(void)HYPERVISOR_xen_version(0, NULL);
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}
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EXPORT_SYMBOL_GPL(force_evtchn_callback);
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static struct irq_chip xen_dynamic_chip;
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/* Constructor for packed IRQ information. */
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