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2229f70b5b
In order to support pvclock vdso on xen we need to setup the time info page for vcpu 0 and register the page with Xen using the VCPUOP_register_vcpu_time_memory_area hypercall. This hypercall will also forcefully update the pvti which will set some of the necessary flags for vdso. Afterwards we check if it supports the PVCLOCK_TSC_STABLE_BIT flag which is mandatory for having vdso/vsyscall support. And if so, it will set the cpu 0 pvti that will be later on used when mapping the vdso image. The xen headers are also updated to include the new hypercall for registering the secondary vcpu_time_info struct. Signed-off-by: Joao Martins <joao.m.martins@oracle.com> Reviewed-by: Juergen Gross <jgross@suse.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
67 lines
1.1 KiB
C
67 lines
1.1 KiB
C
#include <linux/types.h>
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#include <linux/tick.h>
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#include <xen/xen.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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#include "pmu.h"
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void xen_arch_pre_suspend(void)
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{
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xen_save_time_memory_area();
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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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xen_restore_time_memory_area();
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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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static void xen_vcpu_notify_suspend(void *data)
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{
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tick_suspend_local();
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}
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void xen_arch_resume(void)
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{
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int cpu;
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on_each_cpu(xen_vcpu_notify_restore, NULL, 1);
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for_each_online_cpu(cpu)
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xen_pmu_init(cpu);
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}
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void xen_arch_suspend(void)
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{
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int cpu;
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for_each_online_cpu(cpu)
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xen_pmu_finish(cpu);
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on_each_cpu(xen_vcpu_notify_suspend, NULL, 1);
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}
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