linux-kernel - Re: [PATCH v5 06/10] Drivers/hv: Export some functions for use by root partition module

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Message-ID: <ba243e7a-927c-4e33-901f-f62a5b1f24eb@linux.microsoft.com>
Date: Thu, 27 Feb 2025 10:11:33 -0800
From: Roman Kisel <romank@...ux.microsoft.com>
To: Nuno Das Neves <nunodasneves@...ux.microsoft.com>,
 linux-hyperv@...r.kernel.org, x86@...nel.org,
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
 linux-arch@...r.kernel.org, linux-acpi@...r.kernel.org
Cc: kys@...rosoft.com, haiyangz@...rosoft.com, wei.liu@...nel.org,
 mhklinux@...look.com, decui@...rosoft.com, catalin.marinas@....com,
 will@...nel.org, tglx@...utronix.de, mingo@...hat.com, bp@...en8.de,
 dave.hansen@...ux.intel.com, hpa@...or.com, daniel.lezcano@...aro.org,
 joro@...tes.org, robin.murphy@....com, arnd@...db.de,
 jinankjain@...ux.microsoft.com, muminulrussell@...il.com,
 skinsburskii@...ux.microsoft.com, mrathor@...ux.microsoft.com,
 ssengar@...ux.microsoft.com, apais@...ux.microsoft.com,
 Tianyu.Lan@...rosoft.com, stanislav.kinsburskiy@...il.com,
 gregkh@...uxfoundation.org, vkuznets@...hat.com, prapal@...ux.microsoft.com,
 muislam@...rosoft.com, anrayabh@...ux.microsoft.com, rafael@...nel.org,
 lenb@...nel.org, corbet@....net
Subject: Re: [PATCH v5 06/10] Drivers/hv: Export some functions for use by
 root partition module



On 2/26/2025 3:08 PM, Nuno Das Neves wrote:
> get_hypervisor_version, hv_call_deposit_pages, hv_call_create_vp,
> hv_call_deposit_pages, and hv_call_create_vp are all needed in module
> with CONFIG_MSHV_ROOT=m.
> 
> Signed-off-by: Nuno Das Neves <nunodasneves@...ux.microsoft.com>
> ---
>   arch/arm64/hyperv/mshyperv.c   | 1 +
>   arch/x86/kernel/cpu/mshyperv.c | 1 +
>   drivers/hv/hv_common.c         | 1 +
>   drivers/hv/hv_proc.c           | 3 ++-
>   4 files changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/hyperv/mshyperv.c b/arch/arm64/hyperv/mshyperv.c
> index 2265ea5ce5ad..4e27cc29c79e 100644
> --- a/arch/arm64/hyperv/mshyperv.c
> +++ b/arch/arm64/hyperv/mshyperv.c
> @@ -26,6 +26,7 @@ int hv_get_hypervisor_version(union hv_hypervisor_version_info *info)
>   
>   	return 0;
>   }
> +EXPORT_SYMBOL_GPL(hv_get_hypervisor_version);
>   
>   static int __init hyperv_init(void)
>   {
> diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c
> index 2c29dfd6de19..0116d0e96ef9 100644
> --- a/arch/x86/kernel/cpu/mshyperv.c
> +++ b/arch/x86/kernel/cpu/mshyperv.c
> @@ -420,6 +420,7 @@ int hv_get_hypervisor_version(union hv_hypervisor_version_info *info)
>   
>   	return 0;
>   }
> +EXPORT_SYMBOL_GPL(hv_get_hypervisor_version);
>   
>   static void __init ms_hyperv_init_platform(void)
>   {
> diff --git a/drivers/hv/hv_common.c b/drivers/hv/hv_common.c
> index ce20818688fe..252fd66ad4db 100644
> --- a/drivers/hv/hv_common.c
> +++ b/drivers/hv/hv_common.c
> @@ -717,6 +717,7 @@ int hv_result_to_errno(u64 status)
>   	}
>   	return -EIO;
>   }
> +EXPORT_SYMBOL_GPL(hv_result_to_errno);
>   
>   void hv_identify_partition_type(void)
>   {
> diff --git a/drivers/hv/hv_proc.c b/drivers/hv/hv_proc.c
> index 8fc30f509fa7..20c8cee81e2b 100644
> --- a/drivers/hv/hv_proc.c
> +++ b/drivers/hv/hv_proc.c
> @@ -108,6 +108,7 @@ int hv_call_deposit_pages(int node, u64 partition_id, u32 num_pages)
>   	kfree(counts);
>   	return ret;
>   }
> +EXPORT_SYMBOL_GPL(hv_call_deposit_pages);
>   
>   int hv_call_add_logical_proc(int node, u32 lp_index, u32 apic_id)
>   {
> @@ -194,4 +195,4 @@ int hv_call_create_vp(int node, u64 partition_id, u32 vp_index, u32 flags)
>   
>   	return ret;
>   }
> -
> +EXPORT_SYMBOL_GPL(hv_call_create_vp);

Reviewed-by: Roman Kisel <romank@...ux.microsoft.com>

-- 
Thank you,
Roman