Re: [PATCH v2 1/3] PCI: hv: Move hypercall related definitions into tlfs header

From: Andrew Murray <amurray@thegoodpenguin.co.uk>
To: Boqun Feng <boqun.feng@gmail.com>
Cc: linux-pci@vger.kernel.org, linux-hyperv@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	Sasha Levin <sashal@kernel.org>,
	Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
	Stephen Hemminger <sthemmin@microsoft.com>,
	Haiyang Zhang <haiyangz@microsoft.com>,
	x86@kernel.org, Michael Kelley <mikelley@microsoft.com>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	"H. Peter Anvin" <hpa@zytor.com>,
	Bjorn Helgaas <bhelgaas@google.com>,
	Andrew Murray <andrew.murray@arm.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	"K. Y. Srinivasan" <kys@microsoft.com>
Subject: Re: [PATCH v2 1/3] PCI: hv: Move hypercall related definitions into tlfs header
Date: Mon, 3 Feb 2020 09:25:25 +0000	[thread overview]
Message-ID: <20200203092525.GC20189@big-machine> (raw)
In-Reply-To: <20200203050313.69247-2-boqun.feng@gmail.com>

On Mon, Feb 03, 2020 at 01:03:11PM +0800, Boqun Feng wrote:
> Currently HVCALL_RETARGET_INTERRUPT and HV_PARTITION_ID_SELF are defined
> in pci-hyperv.c. However, similar to other hypercall related definitions
> , it makes more sense to put them in the tlfs header file.

Nit: please keep the comma attached to the previous word - even if that
means you need to move the word with it to the next line to maintain line
limits.

> 
> Besides, these definitions are arch-dependent, so for the support of
> virtual PCI on non-x86 archs in the future, move them into arch-specific
> tlfs header file.
> 
> Signed-off-by: Boqun Feng (Microsoft) <boqun.feng@gmail.com>
> ---
>  arch/x86/include/asm/hyperv-tlfs.h  | 3 +++
>  drivers/pci/controller/pci-hyperv.c | 6 ------
>  2 files changed, 3 insertions(+), 6 deletions(-)
> 
> diff --git a/arch/x86/include/asm/hyperv-tlfs.h b/arch/x86/include/asm/hyperv-tlfs.h
> index 5f10f7f2098d..739bd89226a5 100644
> --- a/arch/x86/include/asm/hyperv-tlfs.h
> +++ b/arch/x86/include/asm/hyperv-tlfs.h
> @@ -376,6 +376,7 @@ struct hv_tsc_emulation_status {
>  #define HVCALL_SEND_IPI_EX			0x0015
>  #define HVCALL_POST_MESSAGE			0x005c
>  #define HVCALL_SIGNAL_EVENT			0x005d
> +#define HVCALL_RETARGET_INTERRUPT		0x007e
>  #define HVCALL_FLUSH_GUEST_PHYSICAL_ADDRESS_SPACE 0x00af
>  #define HVCALL_FLUSH_GUEST_PHYSICAL_ADDRESS_LIST 0x00b0
>  
> @@ -405,6 +406,8 @@ enum HV_GENERIC_SET_FORMAT {
>  	HV_GENERIC_SET_ALL,
>  };
>  
> +#define HV_PARTITION_ID_SELF                    ((u64)-1)
> +
>  #define HV_HYPERCALL_RESULT_MASK	GENMASK_ULL(15, 0)
>  #define HV_HYPERCALL_FAST_BIT		BIT(16)
>  #define HV_HYPERCALL_VARHEAD_OFFSET	17
> diff --git a/drivers/pci/controller/pci-hyperv.c b/drivers/pci/controller/pci-hyperv.c
> index 9977abff92fc..aacfcc90d929 100644
> --- a/drivers/pci/controller/pci-hyperv.c
> +++ b/drivers/pci/controller/pci-hyperv.c
> @@ -406,12 +406,6 @@ struct pci_eject_response {
>  
>  static int pci_ring_size = (4 * PAGE_SIZE);
>  
> -/*
> - * Definitions or interrupt steering hypercall.
> - */
> -#define HV_PARTITION_ID_SELF		((u64)-1)
> -#define HVCALL_RETARGET_INTERRUPT	0x7e
> -

Reviewed-by: Andrew Murray <amurray@thegoodpenguin.co.uk>

>  struct hv_interrupt_entry {
>  	u32	source;			/* 1 for MSI(-X) */
>  	u32	reserved1;
> -- 
> 2.24.1
> 
> 
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