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Shutemov" To: Sean Christopherson , Paolo Bonzini , Dave Hansen , Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, "H. Peter Anvin" , "K. Y. Srinivasan" , Haiyang Zhang , Wei Liu , Dexuan Cui , Josh Poimboeuf , Peter Zijlstra Cc: linux-coco@lists.linux.dev, linux-kernel@vger.kernel.org, linux-hyperv@vger.kernel.org, "Kirill A. Shutemov" Subject: [PATCH 09/20] x86/tdx: Convert MAP_GPA hypercall to use new TDVMCALL macros Date: Fri, 17 May 2024 17:19:27 +0300 Message-ID: <20240517141938.4177174-10-kirill.shutemov@linux.intel.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240517141938.4177174-1-kirill.shutemov@linux.intel.com> References: <20240517141938.4177174-1-kirill.shutemov@linux.intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Use newly introduced TDVMCALL_1() instead of __tdx_hypercall() to issue MAP_GPA hypercall. It cuts code bloat substantially: Function old new delta tdx_enc_status_changed 352 242 -110 tdx_kexec_finish 645 530 -115 tdx_enc_status_change_prepare 326 181 -145 Total: Before=3D5553, After=3D5183, chg -6.66% Signed-off-by: Kirill A. Shutemov --- arch/x86/coco/tdx/tdx.c | 12 +++--------- 1 file changed, 3 insertions(+), 9 deletions(-) diff --git a/arch/x86/coco/tdx/tdx.c b/arch/x86/coco/tdx/tdx.c index df3e10d899b3..7c874a50a319 100644 --- a/arch/x86/coco/tdx/tdx.c +++ b/arch/x86/coco/tdx/tdx.c @@ -797,15 +797,10 @@ static bool tdx_map_gpa(phys_addr_t start, phys_addr_= t end, bool enc) } =20 while (retry_count < max_retries_per_page) { - struct tdx_module_args args =3D { - .r10 =3D TDX_HYPERCALL_STANDARD, - .r11 =3D TDVMCALL_MAP_GPA, - .r12 =3D start, - .r13 =3D end - start }; - - u64 map_fail_paddr; - u64 ret =3D __tdx_hypercall(&args); + u64 map_fail_paddr, ret; =20 + ret =3D TDVMCALL_1(TDVMCALL_MAP_GPA, + start, end - start, 0, 0, map_fail_paddr); if (ret !=3D TDVMCALL_STATUS_RETRY) return !ret; /* @@ -813,7 +808,6 @@ static bool tdx_map_gpa(phys_addr_t start, phys_addr_t = end, bool enc) * region starting at the GPA specified in R11. R11 comes * from the untrusted VMM. Sanity check it. */ - map_fail_paddr =3D args.r11; if (map_fail_paddr < start || map_fail_paddr >=3D end) return false; =20 --=20 2.43.0