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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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f46481d0a7
Xen calls on every cpu into tick_resume() which is just wrong. tick_resume() is for the syscore global suspend/resume invocation. What XEN really wants is a per cpu local resume function. Provide a tick_resume_local() function and use it in XEN. Also provide a complementary tick_suspend_local() and modify tick_unfreeze() and tick_freeze(), respectively, to use the new local tick resume/suspend functions. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> [ Combined two patches, rebased, modified subject/changelog. ] Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: David Vrabel <david.vrabel@citrix.com> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1698741.eezk9tnXtG@vostro.rjw.lan [ Merged to latest timers/core. ] Signed-off-by: Ingo Molnar <mingo@kernel.org>
95 lines
1.9 KiB
C
95 lines
1.9 KiB
C
#include <linux/types.h>
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#include <linux/tick.h>
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#include <xen/interface/xen.h>
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#include <xen/grant_table.h>
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#include <xen/events.h>
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#include <asm/xen/hypercall.h>
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#include <asm/xen/page.h>
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#include <asm/fixmap.h>
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#include "xen-ops.h"
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#include "mmu.h"
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static void xen_pv_pre_suspend(void)
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{
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xen_mm_pin_all();
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xen_start_info->store_mfn = mfn_to_pfn(xen_start_info->store_mfn);
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xen_start_info->console.domU.mfn =
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mfn_to_pfn(xen_start_info->console.domU.mfn);
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BUG_ON(!irqs_disabled());
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HYPERVISOR_shared_info = &xen_dummy_shared_info;
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if (HYPERVISOR_update_va_mapping(fix_to_virt(FIX_PARAVIRT_BOOTMAP),
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__pte_ma(0), 0))
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BUG();
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}
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static void xen_hvm_post_suspend(int suspend_cancelled)
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{
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#ifdef CONFIG_XEN_PVHVM
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int cpu;
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xen_hvm_init_shared_info();
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xen_callback_vector();
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xen_unplug_emulated_devices();
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if (xen_feature(XENFEAT_hvm_safe_pvclock)) {
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for_each_online_cpu(cpu) {
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xen_setup_runstate_info(cpu);
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}
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}
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#endif
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}
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static void xen_pv_post_suspend(int suspend_cancelled)
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{
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xen_build_mfn_list_list();
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xen_setup_shared_info();
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if (suspend_cancelled) {
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xen_start_info->store_mfn =
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pfn_to_mfn(xen_start_info->store_mfn);
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xen_start_info->console.domU.mfn =
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pfn_to_mfn(xen_start_info->console.domU.mfn);
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} else {
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#ifdef CONFIG_SMP
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BUG_ON(xen_cpu_initialized_map == NULL);
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cpumask_copy(xen_cpu_initialized_map, cpu_online_mask);
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#endif
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xen_vcpu_restore();
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}
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xen_mm_unpin_all();
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}
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void xen_arch_pre_suspend(void)
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{
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if (xen_pv_domain())
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xen_pv_pre_suspend();
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}
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void xen_arch_post_suspend(int cancelled)
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{
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if (xen_pv_domain())
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xen_pv_post_suspend(cancelled);
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else
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xen_hvm_post_suspend(cancelled);
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}
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static void xen_vcpu_notify_restore(void *data)
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{
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/* Boot processor notified via generic timekeeping_resume() */
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if (smp_processor_id() == 0)
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return;
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tick_resume_local();
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}
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void xen_arch_resume(void)
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{
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on_each_cpu(xen_vcpu_notify_restore, NULL, 1);
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}
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