linux-kernel - RE: [PATCH hyperv-next v4 10/16] Drivers: hv: Rename the SynIC enable and disable routines

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Message-ID:
 <SN6PR02MB4157E01A2FFB276C3E79AC54D45CA@SN6PR02MB4157.namprd02.prod.outlook.com>
Date: Tue, 22 Jul 2025 17:44:41 +0000
From: Michael Kelley <mhklinux@...look.com>
To: Roman Kisel <romank@...ux.microsoft.com>, "alok.a.tiwari@...cle.com"
	<alok.a.tiwari@...cle.com>, "arnd@...db.de" <arnd@...db.de>, "bp@...en8.de"
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	"decui@...rosoft.com" <decui@...rosoft.com>, "haiyangz@...rosoft.com"
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	<mingo@...hat.com>, "rdunlap@...radead.org" <rdunlap@...radead.org>,
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	<Tianyu.Lan@...rosoft.com>, "wei.liu@...nel.org" <wei.liu@...nel.org>,
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CC: "apais@...rosoft.com" <apais@...rosoft.com>, "benhill@...rosoft.com"
	<benhill@...rosoft.com>, "bperkins@...rosoft.com" <bperkins@...rosoft.com>,
	"sunilmut@...rosoft.com" <sunilmut@...rosoft.com>
Subject: RE: [PATCH hyperv-next v4 10/16] Drivers: hv: Rename the SynIC enable
 and disable routines

From: Roman Kisel <romank@...ux.microsoft.com> Sent: Monday, July 14, 2025 3:16 PM
> 
> The confidential VMBus requires support for the both hypervisor
> facing SynIC and the paravisor one.
> 
> Rename the functions that enable and disable SynIC with the
> hypervisor. No functional changes.
> 
> Signed-off-by: Roman Kisel <romank@...ux.microsoft.com>

Reviewed-by: Michael Kelley <mhklinux@...look.com>

> ---
>  drivers/hv/channel_mgmt.c |  2 +-
>  drivers/hv/hv.c           | 11 ++++++-----
>  drivers/hv/hyperv_vmbus.h |  4 ++--
>  drivers/hv/vmbus_drv.c    |  6 +++---
>  4 files changed, 12 insertions(+), 11 deletions(-)
> 
> diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c
> index 6f87220e2ca3..ca2fe10c110a 100644
> --- a/drivers/hv/channel_mgmt.c
> +++ b/drivers/hv/channel_mgmt.c
> @@ -845,7 +845,7 @@ static void vmbus_wait_for_unload(void)
>  			/*
>  			 * In a CoCo VM the hyp_synic_message_page is not allocated
>  			 * in hv_synic_alloc(). Instead it is set/cleared in
> -			 * hv_synic_enable_regs() and hv_synic_disable_regs()
> +			 * hv_hyp_synic_enable_regs() and
> hv_hyp_synic_disable_regs()
>  			 * such that it is set only when the CPU is online. If
>  			 * not all present CPUs are online, the message page
>  			 * might be NULL, so skip such CPUs.
> diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c
> index a8669843c56e..94a81bb3c8c7 100644
> --- a/drivers/hv/hv.c
> +++ b/drivers/hv/hv.c
> @@ -266,9 +266,10 @@ void hv_synic_free(void)
>  }
> 
>  /*
> - * hv_synic_enable_regs - Initialize the Synthetic Interrupt Controller.
> + * hv_hyp_synic_enable_regs - Initialize the Synthetic Interrupt Controller
> + * with the hypervisor.
>   */
> -void hv_synic_enable_regs(unsigned int cpu)
> +void hv_hyp_synic_enable_regs(unsigned int cpu)
>  {
>  	struct hv_per_cpu_context *hv_cpu =
>  		per_cpu_ptr(hv_context.cpu_context, cpu);
> @@ -334,14 +335,14 @@ void hv_synic_enable_regs(unsigned int cpu)
> 
>  int hv_synic_init(unsigned int cpu)
>  {
> -	hv_synic_enable_regs(cpu);
> +	hv_hyp_synic_enable_regs(cpu);
> 
>  	hv_stimer_legacy_init(cpu, VMBUS_MESSAGE_SINT);
> 
>  	return 0;
>  }
> 
> -void hv_synic_disable_regs(unsigned int cpu)
> +void hv_hyp_synic_disable_regs(unsigned int cpu)
>  {
>  	struct hv_per_cpu_context *hv_cpu =
>  		per_cpu_ptr(hv_context.cpu_context, cpu);
> @@ -528,7 +529,7 @@ int hv_synic_cleanup(unsigned int cpu)
>  always_cleanup:
>  	hv_stimer_legacy_cleanup(cpu);
> 
> -	hv_synic_disable_regs(cpu);
> +	hv_hyp_synic_disable_regs(cpu);
> 
>  	return ret;
>  }
> diff --git a/drivers/hv/hyperv_vmbus.h b/drivers/hv/hyperv_vmbus.h
> index 16b5cf1bca19..2873703d08a9 100644
> --- a/drivers/hv/hyperv_vmbus.h
> +++ b/drivers/hv/hyperv_vmbus.h
> @@ -189,10 +189,10 @@ extern int hv_synic_alloc(void);
> 
>  extern void hv_synic_free(void);
> 
> -extern void hv_synic_enable_regs(unsigned int cpu);
> +extern void hv_hyp_synic_enable_regs(unsigned int cpu);
>  extern int hv_synic_init(unsigned int cpu);
> 
> -extern void hv_synic_disable_regs(unsigned int cpu);
> +extern void hv_hyp_synic_disable_regs(unsigned int cpu);
>  extern int hv_synic_cleanup(unsigned int cpu);
> 
>  /* Interface */
> diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
> index 72940a64b0b6..13aca5abc7d8 100644
> --- a/drivers/hv/vmbus_drv.c
> +++ b/drivers/hv/vmbus_drv.c
> @@ -2809,7 +2809,7 @@ static void hv_crash_handler(struct pt_regs *regs)
>  	 */
>  	cpu = smp_processor_id();
>  	hv_stimer_cleanup(cpu);
> -	hv_synic_disable_regs(cpu);
> +	hv_hyp_synic_disable_regs(cpu);
>  };
> 
>  static int hv_synic_suspend(void)
> @@ -2834,14 +2834,14 @@ static int hv_synic_suspend(void)
>  	 * interrupts-disabled context.
>  	 */
> 
> -	hv_synic_disable_regs(0);
> +	hv_hyp_synic_disable_regs(0);
> 
>  	return 0;
>  }
> 
>  static void hv_synic_resume(void)
>  {
> -	hv_synic_enable_regs(0);
> +	hv_hyp_synic_enable_regs(0);
> 
>  	/*
>  	 * Note: we don't need to call hv_stimer_init(0), because the timer
> --
> 2.43.0