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Mon, 11 Sep 2023 15:57:50 -0700 (PDT) Received: from charlie.ba.rivosinc.com ([66.220.2.162]) by smtp.gmail.com with ESMTPSA id y18-20020aa78052000000b0066a2e8431a0sm6021038pfm.183.2023.09.11.15.57.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 11 Sep 2023 15:57:49 -0700 (PDT) From: Charlie Jenkins Date: Mon, 11 Sep 2023 15:57:15 -0700 Subject: [PATCH v4 5/5] riscv: Test checksum functions MIME-Version: 1.0 Message-Id: <20230911-optimize_checksum-v4-5-77cc2ad9e9d7@rivosinc.com> References: <20230911-optimize_checksum-v4-0-77cc2ad9e9d7@rivosinc.com> In-Reply-To: <20230911-optimize_checksum-v4-0-77cc2ad9e9d7@rivosinc.com> To: Charlie Jenkins , Palmer Dabbelt , Conor Dooley , Samuel Holland , David Laight , linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Cc: Paul Walmsley , Albert Ou X-Mailer: b4 0.12.3 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230911_155751_005077_828C88C4 X-CRM114-Status: GOOD ( 13.60 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Add Kconfig support for riscv specific testing modules. This was created to supplement lib/checksum_kunit.c, and add tests for ip_fast_csum and csum_ipv6_magic. Signed-off-by: Charlie Jenkins --- arch/riscv/Kconfig.debug | 1 + arch/riscv/lib/Kconfig.debug | 31 ++++ arch/riscv/lib/Makefile | 2 + arch/riscv/lib/riscv_checksum_kunit.c | 330 ++++++++++++++++++++++++++++++++++ 4 files changed, 364 insertions(+) diff --git a/arch/riscv/Kconfig.debug b/arch/riscv/Kconfig.debug index e69de29bb2d1..53a84ec4f91f 100644 --- a/arch/riscv/Kconfig.debug +++ b/arch/riscv/Kconfig.debug @@ -0,0 +1 @@ +source "arch/riscv/lib/Kconfig.debug" diff --git a/arch/riscv/lib/Kconfig.debug b/arch/riscv/lib/Kconfig.debug new file mode 100644 index 000000000000..15fc83b68340 --- /dev/null +++ b/arch/riscv/lib/Kconfig.debug @@ -0,0 +1,31 @@ +# SPDX-License-Identifier: GPL-2.0-only +menu "riscv Testing and Coverage" + +menuconfig RUNTIME_TESTING_MENU + bool "Runtime Testing" + def_bool y + help + Enable riscv runtime testing. + +if RUNTIME_TESTING_MENU + +config RISCV_CHECKSUM_KUNIT + tristate "KUnit test riscv checksum functions at runtime" if !KUNIT_ALL_TESTS + depends on KUNIT + default KUNIT_ALL_TESTS + help + Enable this option to test the checksum functions at boot. + + KUnit tests run during boot and output the results to the debug log + in TAP format (http://testanything.org/). Only useful for kernel devs + running the KUnit test harness, and not intended for inclusion into a + production build. + + For more information on KUnit and unit tests in general please refer + to the KUnit documentation in Documentation/dev-tools/kunit/. + + If unsure, say N. + +endif # RUNTIME_TESTING_MENU + +endmenu # "riscv Testing and Coverage" diff --git a/arch/riscv/lib/Makefile b/arch/riscv/lib/Makefile index 2aa1a4ad361f..1535a8c81430 100644 --- a/arch/riscv/lib/Makefile +++ b/arch/riscv/lib/Makefile @@ -12,3 +12,5 @@ lib-$(CONFIG_64BIT) += tishift.o lib-$(CONFIG_RISCV_ISA_ZICBOZ) += clear_page.o obj-$(CONFIG_FUNCTION_ERROR_INJECTION) += error-inject.o + +obj-$(CONFIG_RISCV_CHECKSUM_KUNIT) += riscv_checksum_kunit.o diff --git a/arch/riscv/lib/riscv_checksum_kunit.c b/arch/riscv/lib/riscv_checksum_kunit.c new file mode 100644 index 000000000000..27f0e465447f --- /dev/null +++ b/arch/riscv/lib/riscv_checksum_kunit.c @@ -0,0 +1,330 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Test cases for checksum + */ + +#include + +#include +#include +#include + +#define CHECK_EQ(lhs, rhs) KUNIT_ASSERT_EQ(test, lhs, rhs) + +static const u8 random_buf[] = { + 0x3d, 0xf9, 0x6f, 0x81, 0x84, 0x11, 0xb8, 0x03, 0x8f, 0x00, 0x1e, 0xfd, + 0xc6, 0x77, 0xf7, 0x72, 0xde, 0x16, 0xe2, 0xf7, 0xf8, 0x81, 0x4b, 0x3e, + 0x36, 0x57, 0x9c, 0x10, 0x4e, 0x53, 0x44, 0x94, 0x5e, 0x6c, 0x5b, 0xde, + 0x98, 0x8a, 0xc5, 0x0a, 0x5d, 0x24, 0x38, 0x4c, 0x50, 0xef, 0x20, 0xe8, + 0x14, 0x4e, 0x8d, 0x3e, 0x80, 0x9a, 0xd9, 0xf1, 0xb5, 0x2d, 0x27, 0x6d, + 0xb4, 0x99, 0x9b, 0x10, 0xf7, 0x12, 0x14, 0xff, 0xe8, 0xe1, 0xd5, 0x1a, + 0x96, 0x86, 0x6a, 0xb3, 0xde, 0x10, 0xf3, 0xa5, 0x08, 0xbd, 0x74, 0x27, + 0x5a, 0x72, 0x4f, 0x5a, 0xd3, 0x4b, 0xbb, 0x73, 0xe3, 0x71, 0xd1, 0x1d, + 0x8c, 0xb3, 0x69, 0xd9, 0x3c, 0xda, 0x58, 0x73, 0x86, 0x19, 0xd1, 0xf9, + 0x58, 0xee, 0x4a, 0x39, 0xf9, 0x43, 0x38, 0x22, 0x8a, 0x6f, 0xee, 0xb5, + 0x7a, 0x31, 0x52, 0x32, 0x80, 0xf1, 0x70, 0x60, 0x7c, 0x0a, 0xa6, 0x54, + 0x08, 0x11, 0x99, 0xa1, 0x4b, 0x58, 0xc1, 0xbe, 0x6d, 0x5e, 0xd1, 0x32, + 0x79, 0xcf, 0xaf, 0x7c, 0x52, 0x6f, 0x26, 0xc4, 0xa8, 0x1d, 0x67, 0x04, + 0x2f, 0xb8, 0x10, 0x9d, 0x97, 0x2f, 0xe3, 0xa1, 0xf7, 0x88, 0xa4, 0xab, + 0xd9, 0x22, 0xaa, 0x8d, 0x11, 0x3b, 0x27, 0x34, 0x31, 0xd6, 0x44, 0xeb, + 0x9f, 0x4c, 0x22, 0x29, 0xea, 0x83, 0xa4, 0x6b, 0x48, 0x7a, 0xe7, 0x4c, + 0x84, 0x5b, 0x24, 0xbe, 0x1e, 0x1f, 0xf6, 0xc7, 0x9e, 0xd4, 0xc1, 0x52, + 0x23, 0x18, 0xaa, 0xfe, 0x72, 0x63, 0x7f, 0x2f, 0xcd, 0xda, 0x0e, 0x39, + 0x09, 0xbb, 0x84, 0x24, 0xa4, 0xa9, 0x2f, 0x01, 0x55, 0xfa, 0xb4, 0xa7, + 0x0c, 0x9c, 0xb0, 0x22, 0x71, 0x85, 0x91, 0x62, 0x97, 0xdc, 0x8d, 0xaf +}; + +static const __sum16 expected_csum_ipv6_magic[] = { + 0xf45f, 0x1b52, 0xa787, 0x5002, 0x562d, 0x2aed, 0x54b4, 0xc018, 0xfdc9, + 0xae5a, 0xa9d1, 0x79e1, 0x12c6, 0xa262, 0x1290, 0x7632, 0x85d, 0xfa1c, + 0xbe47, 0x304b, 0x506e, 0x4dd0, 0x1ce7, 0x49f5, 0x4c39, 0xa900, 0x16d6, + 0x4c3d, 0xf8b7, 0x71ab, 0x9109, 0x992b, 0x19a9, 0x8b0f, 0xff9c, 0x3113, + 0x152f, 0xcffc, 0xb3af, 0xfb87, 0x7015, 0x2005, 0x2fa5, 0x4c99, 0xd8fe, + 0xffb5, 0x4610, 0xe437, 0xa888, 0x49b0, 0x8705, 0xabfa, 0x2ed2, 0x8788, + 0xdff8, 0x662f, 0x3ac0, 0xf00c, 0x863a, 0xce3f, 0xfe40, 0x38e0, 0xb0a9, + 0x181, 0xee1d, 0x707a, 0x922, 0xd470, 0x3fad, 0x6b7b, 0x3945, 0x8991, + 0x3ffb, 0xc8c5, 0xfae1, 0x59cb, 0xfc51, 0x6954, 0x8955, 0x49d3, 0xc582, + 0x61bd, 0xe5a4, 0xaf1d, 0xa2d0, 0xb02b, 0xbf1e, 0x20ac, 0xd5d4, 0x2450, + 0xc454, 0x6a16, 0x4f9c, 0xeecf, 0xb7de, 0x9f27, 0x99fe, 0xb715, 0xfdc0, + 0xc6a2, 0xbb1a, 0xf0c2, 0xbb01, 0x8f53, 0xad2f, 0x9bf7, 0x9f3, 0x87ca, + 0xb445, 0xc220, 0x8b20, 0xd65a, 0xba07, 0x6b33, 0x4139, 0xbeef, 0x673a, + 0xbab8, 0xa929, 0x54cf, 0x2a18, 0xbbd1, 0x2d8, 0x2269, 0xa025, 0xeece, + 0x64a6, 0x5b74, 0x5ef7, 0xbaf5, 0x26e9, 0x2009, 0xabc0, 0x97a1, 0x41f, + 0xe0a7, 0x6d8b, 0x2845, 0x374a, 0x76e0, 0x7303, 0x1384, 0x854e, 0xcfac, + 0xc102, 0xc7f1, 0x479d, 0x9d8b, 0xd587, 0xc173, 0xb00c, 0xc4d1, 0xe8ed, + 0x51d2, 0x48d4, 0xd9eb, 0x6744, 0xcaf, 0xf785, 0xe8dc, 0x9034, 0x7413, + 0x26ce, 0x3b4b, 0xbf9, 0xba2a, 0xe9d8, 0x89de, 0x5150, 0x28ef, 0xbefb, + 0xb67f, 0xee07, 0x1c10, 0x2534, 0x78ce, 0xfc75, 0x7a6d, 0x5cdd, 0x7edb, + 0xf3ad, 0xd7bf, 0x3b1, 0xc411, 0xacfc, 0xe3b5, 0xca9d, 0x174e, 0x893b, + 0x442c, 0x4dec, 0x827d, 0x5783, 0x2dac, 0x7d26, 0x3530, 0xb0db, 0x11bc, + 0xb2ac, 0x4462 +}; + +static const __sum16 expected_fast_csum[] = { + 0x78e9, 0x2e78, 0xf02e, 0x52f0, 0x3353, 0xa133, 0xeda0, 0xbced, 0xe0bc, + 0xfde0, 0x8dfd, 0xd78d, 0xf6d7, 0x3ff7, 0x240, 0xdc02, 0x96db, 0x2197, + 0x2321, 0x3e23, 0x103f, 0xda10, 0x6dda, 0xed6d, 0x5fed, 0xd35f, 0xc7d2, + 0x4ec8, 0xf04d, 0x87f0, 0xf587, 0x3ef5, 0x4b3f, 0x1d4b, 0x1d1d, 0x9f1c, + 0x99f, 0x8209, 0x6682, 0x2067, 0x420, 0xc903, 0x8ec8, 0x658e, 0xca65, + 0xbec9, 0xa6bf, 0xcba6, 0x8fcb, 0xf78e, 0xfbf6, 0xaefb, 0x1faf, 0x991f, + 0x3399, 0x834, 0x7208, 0xdf71, 0x8edf, 0x138e, 0x5613, 0xbf56, 0x32bf, + 0xe632, 0x1be6, 0x831c, 0xbc82, 0x47bc, 0x6148, 0x5d61, 0xf75d, 0x77f7, + 0x9e77, 0x2a9e, 0xb32a, 0xc3b2, 0x48c4, 0x1649, 0xa615, 0x9fa6, 0x729f, + 0x6b72, 0x556b, 0x8755, 0x987, 0x5b09, 0x625b, 0xd961, 0xc2d8, 0x53c3, + 0x2053, 0xc420, 0x5ac4, 0xae5a, 0x88ae, 0x4789, 0x8447, 0x4984, 0xc849, + 0xc4c7, 0xebc4, 0x86eb, 0x9487, 0x8d94, 0xd58d, 0x93d5, 0xfd92, 0xf3fd, + 0x96f4, 0xd096, 0x7ad1, 0x757a, 0x5f75, 0x6660, 0x9266, 0x592, 0x1305, + 0x4413, 0x2a44, 0x712a, 0x2171, 0x7e21, 0xf47d, 0xfef3, 0xf3fe, 0x5f4, + 0x1606, 0xc715, 0xf9c6, 0xf0f9, 0x94f0, 0x7095, 0x2570, 0xd024, 0x18d0, + 0x219, 0xb602, 0x1eb6, 0x561e, 0xcf56, 0x77cf, 0xa577, 0xa6a5, 0x93a6, + 0x3793, 0x1537, 0x7e15, 0x207e, 0x4f20, 0x994e, 0x9b99, 0x159b, 0xd215, + 0xacd2, 0xb4ac, 0xecb4, 0x84ec, 0xea84, 0x66ea, 0xb666, 0x18b6, 0xae18, + 0xfbad, 0x6efc, 0x746f, 0x7c74, 0x797c, 0x7c79, 0xb97c, 0xdba, 0x620d, + 0xd061, 0xa2d0, 0x5da2, 0x825d, 0x6082, 0xf85f, 0x72f8, 0xaf73, 0xc1ae, + 0xd2c1, 0xb8a5, 0xacb8, 0x5aad, 0x805a, 0xcb80, 0xb6cb, 0x89b6, 0x2a8a, + 0xf929, 0x5af9, 0x8d5a, 0x1d8d, 0xac1d, 0x4bac, 0x994b, 0x7d99, 0x17e, + 0xff01, 0xf3fe, 0xa8f4, 0x9fa9, 0x51a0, 0x3251, 0x7c32, 0x887b, 0x9d88, + 0x919d, 0xac91, 0x63ac, 0x7a63, 0x1c7a, 0xe51b, 0xbee4, 0x8dbe, 0xfd8d, + 0xc1fd, 0x6ec2, 0xa66e, 0x5fa6, 0xd05f, 0x59d0, 0x3659, 0x6b36, 0x5a6b, + 0xb859, 0xc1b7, 0xc5c1, 0xcc5, 0x930d, 0x8b92, 0x5a8b, 0xae5a, 0xe5ad, + 0x4fe5, 0x6f50, 0x366f, 0xbb36, 0xe3bb, 0x2be3, 0x962b, 0x7196, 0xf071, + 0x98f0, 0x3c99, 0x4f3c, 0x604f, 0x1660, 0xb915, 0xa1b9, 0xbea1, 0x11bf, + 0xc311, 0xec3, 0xcd0e, 0xe1cc, 0xcde1, 0xbbcd, 0x6fbc, 0xf26e, 0x9f3, + 0x250a, 0x8c24, 0xc88c, 0x2fc8, 0xf62e, 0x30f6, 0x7a30, 0x357a, 0x9b35, + 0xf9b, 0xa30f, 0x92a3, 0xf492, 0xebf4, 0xf6eb, 0xcef6, 0x5ece, 0xe05e, + 0xe0e0, 0xf7e0, 0x87f8, 0xb487, 0x70b4, 0x9c70, 0x839c, 0xa683, 0x92a6, + 0xd192, 0x37d2, 0x2238, 0x1523, 0xd414, 0xacd3, 0x81ad, 0x9881, 0xf897, + 0xfbf7, 0x14fc, 0xd15, 0x320d, 0x9032, 0x3390, 0xf232, 0xd5f1, 0xa7d5, + 0x3a8, 0x2a04, 0x4e2a, 0xc64d, 0x21c6, 0xb321, 0x60b3, 0x361, 0x3a03, + 0x5c39, 0xc25c, 0x60c2, 0x7660, 0x8976, 0x5489, 0xa654, 0xcaa5, 0x7bca, + 0xf77b, 0x2f7, 0x9702, 0xaf97, 0x9caf, 0x9e9c, 0xdd9e, 0xd2dd, 0xdcd2, + 0x62dd, 0x5463, 0xaa53, 0x76aa, 0xc375, 0x5c3, 0x2f06, 0xf42e, 0xa2f4, + 0xa1a2, 0x4ea1, 0xe04e, 0x84e0, 0x8f85, 0x938f, 0x4c93, 0xf24c, 0xa1f2, + 0xb9a1, 0x27ba, 0x8927, 0x1a89, 0xa51a, 0x4ba4, 0x114b, 0xde10, 0x12de, + 0x6112, 0xab61, 0x50d3, 0xc250, 0xf6c2, 0xedf6, 0xe3ed, 0x13e4, 0x8913, + 0x7089, 0xae6f, 0x66ae, 0x2466, 0xbf23, 0x16c0, 0x2917, 0x6a29, 0xe86a, + 0x90e8, 0x7691, 0xb875, 0x37b9, 0xc837, 0x1bc9, 0xfc1b, 0xd9fb, 0xfbd9, + 0x8ffb, 0xb88f, 0x52b8, 0xd751, 0xead6, 0xfcea, 0x7fd, 0x2408, 0xb223, + 0xf6b1, 0x71f6, 0xc472, 0x13c4, 0x3c14, 0xc53c, 0x47c4, 0x3947, 0x8a38, + 0x9b89, 0xbb9b, 0x55bb, 0x2456, 0xc24, 0x590c, 0x4258, 0x9642, 0xdc95, + 0x2edc, 0x542f, 0xc54, 0xb90c, 0xd6b9, 0x14d7, 0x9214, 0xec91, 0xa4ec, + 0xcda4, 0xf2cd, 0xadf2, 0x8fad, 0xc18f, 0x30c1, 0x430, 0x1205, 0x6112, + 0x4061, 0xcd40, 0x81cc, 0x2682, 0x2e26, 0x382e, 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0x7fc8, 0xe97f, 0x1fe9, + 0x5420, 0xd553, 0x6cd5, 0xc96c, 0x59c9, 0x9a59, 0xca99, 0x68ca, 0x3d68, + 0x7c3d, 0x527c, 0x4452, 0xc744, 0xd2c6, 0xfbd2, 0x8efb, 0x408e, 0xb640, + 0xecb5, 0x44ed, 0xa545, 0x1a5, 0x8f01, 0xf08e, 0xd9f0, 0x1ada, 0x41b, + 0xc803, 0x5ec7, 0x445f, 0x4044, 0x640, 0xd07, 0x6f0d, 0xfd6e, 0xd3fd, + 0xb7d3, 0xedb7, 0x33ee, 0xb233, 0x92b2, 0x8893, 0x9288, 0xe292, 0x96e2, + 0x9f96, 0xfb9f, 0x52fb, 0x6452, 0x3f64, 0x783f, 0xbd77, 0x9fbd, 0x17a0, + 0x1c17, 0x231c, 0x1323, 0xb413, 0x15b4, 0x5f16, 0x6f5e, 0x426f, 0x543, + 0x4505, 0xda45, 0x52da, 0xfc52, 0x9afc, 0xd29a, 0x89d2, 0xbc89, 0x77bc, + 0x1478, 0xd913, 0x79d9, 0x7f79, 0x77f, 0x9f07, 0x289f, 0x2d28, 0xbd2c, + 0xa5bd, 0xf1a5, 0x6cf2, 0x736d, 0xb673, 0xceb5, 0xc3ce, 0x15c3, 0xa415, + 0xbaa4, 0xf2ba, 0xf1f2, 0x84f1, 0x7884, 0x8678, 0x6186, 0x4661, 0xf845, + 0xf7f7, 0x4cf8, 0xbf4c, 0x49bf, 0x5c4a, 0x4a5c, 0xab4a, 0x89ab, 0x8689, + 0xf485, 0x60f4, 0xef60, 0x4eef, 0x194f, 0x7e19, 0x707e, 0xfa6f, 0x35fa, + 0x3036, 0xf02f, 0x17f0, 0xc517, 0x79c4, 0xa279, 0x7ba2, 0x67c, 0xa07, + 0x7b09, 0x687b, 0xf868, 0xbbf8, 0xd7bb, 0x30d8, 0x8231, 0xb582, 0xaab4, + 0xaaaa, 0x90aa, 0xaf90, 0x2faf, 0x262f, 0x4126, 0xe640, 0x91e6, 0x9991, + 0x1a9a +}; + +#define IPv4_MIN_WORDS 5 +#define IPv4_MAX_WORDS 15 +#define NUM_IPv6_TESTS 200 +#define NUM_IP_FAST_CSUM_TESTS 181 + +static void test_ip_fast_csum(struct kunit *test) +{ + __sum16 csum_result, expected; + + for (int len = IPv4_MIN_WORDS; len < IPv4_MAX_WORDS; len++) { + for (int index = 0; index < NUM_IP_FAST_CSUM_TESTS; index++) { + csum_result = ip_fast_csum(random_buf + index, len); + expected = + expected_fast_csum[(len - IPv4_MIN_WORDS) * + NUM_IP_FAST_CSUM_TESTS + + index]; + CHECK_EQ(expected, csum_result); + } + } +} + +static void test_csum_ipv6_magic(struct kunit *test) +{ + const struct in6_addr *saddr; + const struct in6_addr *daddr; + unsigned int len; + unsigned char proto; + unsigned int csum; + + const int daddr_offset = sizeof(struct in6_addr); + const int len_offset = sizeof(struct in6_addr) + sizeof(struct in6_addr); + const int proto_offset = sizeof(struct in6_addr) + sizeof(struct in6_addr) + + sizeof(int); + const int csum_offset = sizeof(struct in6_addr) + sizeof(struct in6_addr) + + sizeof(int) + sizeof(char); + + for (int i = 0; i < NUM_IPv6_TESTS; i++) { + saddr = (const struct in6_addr *)(random_buf + i); + daddr = (const struct in6_addr *)(random_buf + i + + daddr_offset); + len = *(unsigned int *)(random_buf + i + len_offset); + proto = *(random_buf + i + proto_offset); + csum = *(unsigned int *)(random_buf + i + csum_offset); + CHECK_EQ(expected_csum_ipv6_magic[i], + csum_ipv6_magic(saddr, daddr, len, proto, csum)); + } +} + +static struct kunit_case __refdata riscv_checksum_test_cases[] = { + KUNIT_CASE(test_ip_fast_csum), + KUNIT_CASE(test_csum_ipv6_magic), + {} +}; + +static struct kunit_suite riscv_checksum_test_suite = { + .name = "riscv_checksum", + .test_cases = riscv_checksum_test_cases, +}; + +kunit_test_suites(&riscv_checksum_test_suite); + +MODULE_AUTHOR("Charlie Jenkins "); +MODULE_LICENSE("GPL");