Re: [PATCH RFC 2/4] xen/pvhvm: Introduce xen_pvhvm_kexec_shutdown()

From: Konrad Rzeszutek Wilk
Date: Tue Jul 15 2014 - 11:10:15 EST


On Tue, Jul 15, 2014 at 03:40:38PM +0200, Vitaly Kuznetsov wrote:
> PVHVM guest requires special actions before kexec. Register specific
> xen_pvhvm_kexec_shutdown() handler for machine_ops.shutdown().
>

This looks close to what I had sent as an RFC to you?

> Signed-off-by: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>
> ---
> arch/x86/xen/enlighten.c | 9 +++++++++
> arch/x86/xen/smp.c | 9 +++++++++
> arch/x86/xen/smp.h | 1 +
> 3 files changed, 19 insertions(+)
>
> diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
> index a11af62..8074e4a 100644
> --- a/arch/x86/xen/enlighten.c
> +++ b/arch/x86/xen/enlighten.c
> @@ -1833,6 +1833,12 @@ static struct notifier_block xen_hvm_cpu_notifier = {
> .notifier_call = xen_hvm_cpu_notify,
> };
>
> +static void xen_pvhvm_kexec_shutdown(void)
> +{
> + xen_kexec_shutdown();
> + native_machine_shutdown();
> +}
> +
> static void __init xen_hvm_guest_init(void)
> {
> init_hvm_pv_info();
> @@ -1849,6 +1855,9 @@ static void __init xen_hvm_guest_init(void)
> x86_init.irqs.intr_init = xen_init_IRQ;
> xen_hvm_init_time_ops();
> xen_hvm_init_mmu_ops();
> +#ifdef CONFIG_KEXEC
> + machine_ops.shutdown = xen_pvhvm_kexec_shutdown;
> +#endif
> }
>
> static uint32_t __init xen_hvm_platform(void)
> diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c
> index 7005974..35dcf39 100644
> --- a/arch/x86/xen/smp.c
> +++ b/arch/x86/xen/smp.c
> @@ -18,6 +18,7 @@
> #include <linux/smp.h>
> #include <linux/irq_work.h>
> #include <linux/tick.h>
> +#include <linux/kexec.h>
>
> #include <asm/paravirt.h>
> #include <asm/desc.h>
> @@ -762,6 +763,14 @@ static void xen_hvm_cpu_die(unsigned int cpu)
> native_cpu_die(cpu);
> }
>
> +void xen_kexec_shutdown(void)
> +{
> +#ifdef CONFIG_KEXEC
> + if (!kexec_in_progress)
> + return;
> +#endif
> +}
> +
> void __init xen_hvm_smp_init(void)
> {
> if (!xen_have_vector_callback)
> diff --git a/arch/x86/xen/smp.h b/arch/x86/xen/smp.h
> index c7c2d89..1af0493 100644
> --- a/arch/x86/xen/smp.h
> +++ b/arch/x86/xen/smp.h
> @@ -8,4 +8,5 @@ extern void xen_send_IPI_allbutself(int vector);
> extern void xen_send_IPI_all(int vector);
> extern void xen_send_IPI_self(int vector);
>
> +extern void xen_kexec_shutdown(void);
> #endif
> --
> 1.9.3
>
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