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From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
To: 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>
Cc: linux-coco@lists.linux.dev,
	linux-kernel@vger.kernel.org,
	linux-hyperv@vger.kernel.org,
	"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Subject: [PATCH 15/20] x86/tdx: Convert PAGE_ACCEPT tdcall to use new TDCALL_0() macro
Date: Fri, 17 May 2024 17:19:33 +0300
Message-ID: <20240517141938.4177174-16-kirill.shutemov@linux.intel.com>
In-Reply-To: <20240517141938.4177174-1-kirill.shutemov@linux.intel.com>
References: <20240517141938.4177174-1-kirill.shutemov@linux.intel.com>
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Use newly introduced TDCALL_0() instead of __tdcall() to issue
PAGE_ACCEPT tdcall.

It cuts code bloat substantially:

Function                                     old     new   delta
tdx_accept_memory                            592     233    -359

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
---
 arch/x86/coco/tdx/tdx-shared.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/x86/coco/tdx/tdx-shared.c b/arch/x86/coco/tdx/tdx-shared.c
index 1655aa56a0a5..9104e96eeefd 100644
--- a/arch/x86/coco/tdx/tdx-shared.c
+++ b/arch/x86/coco/tdx/tdx-shared.c
@@ -5,8 +5,8 @@ static unsigned long try_accept_one(phys_addr_t start, unsigned long len,
 				    enum pg_level pg_level)
 {
 	unsigned long accept_size = page_level_size(pg_level);
-	struct tdx_module_args args = {};
 	u8 page_size;
+	u64 ret;
 
 	if (!IS_ALIGNED(start, accept_size))
 		return 0;
@@ -34,8 +34,8 @@ static unsigned long try_accept_one(phys_addr_t start, unsigned long len,
 		return 0;
 	}
 
-	args.rcx = start | page_size;
-	if (__tdcall(TDG_MEM_PAGE_ACCEPT, &args))
+	ret = TDCALL_0(TDG_MEM_PAGE_ACCEPT, start | page_size, 0, 0, 0);
+	if (ret)
 		return 0;
 
 	return accept_size;
-- 
2.43.0