linux-kernel - Re: [PATCH v9 3/8] x86/vmware: Introduce VMware hypercall API

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Date: Thu, 23 May 2024 13:52:35 +0100
From: Simon Horman <horms@...nel.org>
To: Alexey Makhalov <alexey.makhalov@...adcom.com>
Cc: linux-kernel@...r.kernel.org, virtualization@...ts.linux.dev,
	bp@...en8.de, hpa@...or.com, dave.hansen@...ux.intel.com,
	mingo@...hat.com, tglx@...utronix.de, x86@...nel.org,
	netdev@...r.kernel.org, richardcochran@...il.com,
	linux-input@...r.kernel.org, dmitry.torokhov@...il.com,
	zackr@...are.com, linux-graphics-maintainer@...are.com,
	pv-drivers@...are.com, timothym@...are.com, akaher@...are.com,
	dri-devel@...ts.freedesktop.org, daniel@...ll.ch, airlied@...il.com,
	tzimmermann@...e.de, mripard@...nel.org,
	maarten.lankhorst@...ux.intel.com, kirill.shutemov@...ux.intel.com,
	Nadav Amit <nadav.amit@...il.com>, Jeff Sipek <jsipek@...are.com>,
	Joe Perches <joe@...ches.com>
Subject: Re: [PATCH v9 3/8] x86/vmware: Introduce VMware hypercall API

[ resending as I mangled the previous attempt , sorry ]

+ Joe Perches

On Wed, May 22, 2024 at 04:39:57PM -0700, Alexey Makhalov wrote:
> Hi Simon, apologize for long delay
> 
> On 5/11/24 8:02 AM, Simon Horman wrote:
> > > diff --git a/arch/x86/include/asm/vmware.h b/arch/x86/include/asm/vmware.h
> > 
> > ...
> > 
> > > +static inline
> > > +unsigned long vmware_hypercall3(unsigned long cmd, unsigned long in1,
> > > +				uint32_t *out1, uint32_t *out2)
> > 
> > nit: u32 is preferred over uint32_t.
> >       Likewise elsewhere in this patch-set.
> Good to know. Can you please shed a light on the reason?
> I still see bunch of stdint style uint32_t in arch/x86.

Perhaps there is a document on this that I should know about.
But AFAIK, u32 and so on are Linux kernel types,
while uint32_t are C99-standard types.

Joe, are you able to shed any further light on this?

..