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Date: Tue, 28 May 2024 05:33:31 +0000
From: Wei Liu <wei.liu@kernel.org>
To: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Sean Christopherson <seanjc@google.com>,
	Paolo Bonzini <pbonzini@redhat.com>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
	"K. Y. Srinivasan" <kys@microsoft.com>,
	Haiyang Zhang <haiyangz@microsoft.com>,
	Wei Liu <wei.liu@kernel.org>, Dexuan Cui <decui@microsoft.com>,
	Josh Poimboeuf <jpoimboe@kernel.org>,
	Peter Zijlstra <peterz@infradead.org>, linux-coco@lists.linux.dev,
	linux-kernel@vger.kernel.org, linux-hyperv@vger.kernel.org
Subject: Re: [PATCH 05/20] x86/tdx: Convert MSR read handling to use new
 TDVMCALL_1()
Message-ID: <ZlVsqz06Ueuetkz1@liuwe-devbox-debian-v2>
References: <20240517141938.4177174-1-kirill.shutemov@linux.intel.com>
 <20240517141938.4177174-6-kirill.shutemov@linux.intel.com>
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In-Reply-To: <20240517141938.4177174-6-kirill.shutemov@linux.intel.com>

On Fri, May 17, 2024 at 05:19:23PM +0300, Kirill A. Shutemov wrote:
> Use newly introduced TDVMCALL_1() instead of __tdx_hypercall() to handle
> MSR read emulation.
> 
> It cuts code bloat substantially:
> 
> Function                                     old     new   delta
> tdx_handle_virt_exception                   2052    1947    -105
> 
> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
> ---
>  arch/x86/coco/tdx/tdx.c | 15 +++++++--------
>  arch/x86/hyperv/ivm.c   | 10 ++--------

Acked-by: Wei Liu <wei.liu@kernel.org>