From patchwork Wed Aug 4 09:19:09 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pengfei Xu X-Patchwork-Id: 12418229 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B6DCEC4320A for ; Wed, 4 Aug 2021 09:20:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9825260F41 for ; Wed, 4 Aug 2021 09:20:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235880AbhHDJUX (ORCPT ); Wed, 4 Aug 2021 05:20:23 -0400 Received: from mga07.intel.com ([134.134.136.100]:53659 "EHLO mga07.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235723AbhHDJUW (ORCPT ); Wed, 4 Aug 2021 05:20:22 -0400 X-IronPort-AV: E=McAfee;i="6200,9189,10065"; a="277642982" X-IronPort-AV: E=Sophos;i="5.84,293,1620716400"; d="scan'208";a="277642982" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 Aug 2021 02:20:10 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.84,293,1620716400"; d="scan'208";a="480082812" Received: from fedora29.sh.intel.com ([10.239.182.87]) by fmsmga008.fm.intel.com with ESMTP; 04 Aug 2021 02:20:07 -0700 From: Pengfei Xu To: Shuah Khan , linux-kselftest , linux-kernel Cc: Pengfei Xu , Heng Su , Yu Yu-cheng , Yu Fenghua , Hansen Dave , Luck Tony , Mehta Sohil , Chen Yu C , kernel test robot Subject: [RFC PATCH v3 1/2] selftests/xsave: test basic XSAVE architecture functionality Date: Wed, 4 Aug 2021 17:19:09 +0800 Message-Id: <827bb4547cca5665af0e51b345c89471332b5fa1.1628067281.git.pengfei.xu@intel.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org The XSAVE feature set supports the saving and restoring of state components, and XSAVE feature is used for process context switching. XSAVE state components include FPU-related x87 state, SSE state, AVX state, etc. This case tests and verifies the basic functions of XSAVE/XRSTOR in user space: display and test the content changes of XSAVE; when the xstate in the same process on the x86 platform is unchanged, the contents of XRSTOR and XSAVE should be the same. This case is the most basic test of XSAVE function. Signed-off-by: Pengfei Xu Reported-by: kernel test robot # compile issues during review --- tools/testing/selftests/Makefile | 1 + tools/testing/selftests/xsave/.gitignore | 2 + tools/testing/selftests/xsave/Makefile | 6 + tools/testing/selftests/xsave/xsave_common.h | 246 ++++++++++++++++++ .../selftests/xsave/xsave_instruction.c | 83 ++++++ 5 files changed, 338 insertions(+) create mode 100644 tools/testing/selftests/xsave/.gitignore create mode 100644 tools/testing/selftests/xsave/Makefile create mode 100644 tools/testing/selftests/xsave/xsave_common.h create mode 100644 tools/testing/selftests/xsave/xsave_instruction.c diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile index fb010a35d61a..4c0ddb8228e1 100644 --- a/tools/testing/selftests/Makefile +++ b/tools/testing/selftests/Makefile @@ -73,6 +73,7 @@ TARGETS += user TARGETS += vDSO TARGETS += vm TARGETS += x86 +TARGETS += xsave TARGETS += zram #Please keep the TARGETS list alphabetically sorted # Run "make quicktest=1 run_tests" or diff --git a/tools/testing/selftests/xsave/.gitignore b/tools/testing/selftests/xsave/.gitignore new file mode 100644 index 000000000000..00b9970360c4 --- /dev/null +++ b/tools/testing/selftests/xsave/.gitignore @@ -0,0 +1,2 @@ +# SPDX-License-Identifier: GPL-2.0-only +xsave_instruction diff --git a/tools/testing/selftests/xsave/Makefile b/tools/testing/selftests/xsave/Makefile new file mode 100644 index 000000000000..dafdb0abdeb3 --- /dev/null +++ b/tools/testing/selftests/xsave/Makefile @@ -0,0 +1,6 @@ +# SPDX-License-Identifier: GPL-2.0-only +CFLAGS := -g -Wall -mxsave -O2 + +TEST_GEN_PROGS := xsave_instruction + +include ../lib.mk diff --git a/tools/testing/selftests/xsave/xsave_common.h b/tools/testing/selftests/xsave/xsave_common.h new file mode 100644 index 000000000000..c555f9d289a3 --- /dev/null +++ b/tools/testing/selftests/xsave/xsave_common.h @@ -0,0 +1,246 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#include +#include +#include +#include +#include +#include +#include +#include "../kselftest.h" + +#ifdef __i386__ +#define XSAVE _xsave +#else +#define XSAVE _xsave64 +#endif + +#ifdef __i386__ +#define XRSTOR _xrstor +#else +#define XRSTOR _xrstor64 +#endif + +#define SAVE_MASK 0xffffffffffffffff +#define RESULT_PASS 0 +#define RESULT_FAIL 1 +#define RESULT_ERROR 3 +#define CHANGE 10 +#define NO_CHANGE 11 + +/* Copied from Linux kernel */ +static inline void native_cpuid(unsigned int *eax, unsigned int *ebx, + unsigned int *ecx, unsigned int *edx) +{ + /* ecx is often an input as well as an output. */ + asm volatile("cpuid" + : "=a" (*eax), + "=b" (*ebx), + "=c" (*ecx), + "=d" (*edx) + : "0" (*eax), "2" (*ecx) + : "memory"); +} + +void execution_failed(char *reason) +{ + ksft_test_result_xfail("%s", reason); + ksft_exit_fail(); +} + +int get_xsave_size(void) +{ + unsigned int eax, ebx, ecx, edx; + + eax = 0x0d; + ebx = 0; + ecx = 0; + edx = 0; + native_cpuid(&eax, &ebx, &ecx, &edx); + + return (int)ecx; +} + +void dump_buffer(unsigned char *buf, int size) +{ + int i, j; + + printf("xsave size = %d (%03xh)\n", size, size); + + for (i = 0; i < size; i += 16) { + printf("%04x: ", i); + + for (j = i; ((j < i + 16) && (j < size)); j++) + printf("%02x ", buf[j]); + printf("\n"); + } +} + +void show_part_buf(unsigned char *buf0, unsigned char *buf1, int start, + int size) +{ + int c; + + printf("%04x: ", start); + for (c = start; ((c < start + 16) && (c < size)); c++) + printf("%02x ", buf0[c]); + printf(" -> "); + for (c = start; ((c < start + 16) && (c < size)); c++) + printf("%02x ", buf1[c]); + printf("\n"); +} + +int show_buf_diff(unsigned char *buf0, unsigned char *buf1, int size) +{ + int a, b, result_buf = RESULT_PASS; + + for (a = 0; a < size; a += 16) { + /* SDM "XSAVE Area": XSAVE feature set does not use bytes 511:416 */ + if ((a >= 416) && (a <= 511)) + continue; + + for (b = a; ((b < a + 16) && (b < size)); b++) { + if (buf0[b] != buf1[b]) { + show_part_buf(buf0, buf1, a, size); + result_buf = RESULT_FAIL; + break; + } + } + } + + return result_buf; +} + +int check_xsave_reserved_header(unsigned char *buf0, + unsigned char *buf1, int size, const char *test_name) +{ + int a, b, result_resv_header = RESULT_PASS; + + /* SDM "Form of XRSTOR": Bytes 63:16 of the XSAVE header should 0 */ + for (a = 528; a < 576 ; a += 16) { + for (b = a; ((b < a + 16) && (b < size)); b++) { + if ((buf0[b] != 0) || (buf1[b] != 0)) { + ksft_print_msg("%s FAIL: buf0[%d]:%d or buf1[%d]:%d not 0\n", + test_name, b, buf0[b], b, buf1[b]); + show_part_buf(buf0, buf1, a, size); + result_resv_header = RESULT_FAIL; + break; + } + } + } + + return result_resv_header; +} + +int check_xsave_buf(unsigned char *buf0, unsigned char *buf1, + int size, const char *test_name, int change) +{ + int result_buf = RESULT_ERROR, result_resv_header = RESULT_ERROR; + + switch (change) { + case CHANGE: + if (show_buf_diff(buf0, buf1, size)) + result_buf = RESULT_PASS; + else { + ksft_print_msg("%s FAIL: xsave content was same\n", test_name); + result_buf = RESULT_FAIL; + } + break; + case NO_CHANGE: + if (show_buf_diff(buf0, buf1, size)) { + ksft_print_msg("%s FAIL: xsave content changed\n", test_name); + show_buf_diff(buf0, buf1, size); + result_buf = RESULT_FAIL; + } else + result_buf = RESULT_PASS; + break; + default: + ksft_test_result_error("%s ERROR: invalid change:%d\n", test_name, + change); + break; + } + + result_resv_header = check_xsave_reserved_header(buf0, buf1, size, + test_name); + + return (result_buf || result_resv_header); +} + +void check_result(int result, const char *test_name) +{ + switch (result) { + case RESULT_PASS: + ksft_test_result_pass("%s PASS\n", test_name); + break; + case RESULT_FAIL: + ksft_test_result_fail("%s FAIL\n", test_name); + break; + case RESULT_ERROR: + ksft_test_result_fail("%s ERROR\n", test_name); + break; + default: + ksft_test_result_error("%s ERROR: invalid result:%c\n", + test_name, result); + break; + } +} + +void populate_fpu_regs(void) +{ + uint32_t ui32; + uint64_t ui64; + + ui32 = 1; + ui64 = 0xBAB00500FAB7; + + /* Initialize FPU and push different values onto FPU register stack: */ + asm volatile ("finit"); + asm volatile ("fldl %0" : : "m" (ui64)); + asm volatile ("flds %0" : : "m" (ui32)); + ui64 += 0x93ABE13; + asm volatile ("fldl %0" : : "m" (ui64)); + ui64 += 0x93; + asm volatile ("fldl %0" : : "m" (ui64)); + asm volatile ("flds %0" : : "m" (ui32)); + asm volatile ("fldl %0" : : "m" (ui64)); + ui64 -= 0x21; + asm volatile ("fldl %0" : : "m" (ui64)); + asm volatile ("flds %0" : : "m" (ui32)); + asm volatile ("fldl %0" : : "m" (ui64)); + + /* Fill each remaining YMM register with a different value: */ + asm volatile ("vbroadcastss %0, %%ymm0" : : "m" (ui32)); + ui32 = 0xFAFBABAF; + asm volatile ("vbroadcastss %0, %%ymm1" : : "m" (ui32)); + ui32 -= 0xA; + asm volatile ("vbroadcastss %0, %%ymm2" : : "m" (ui32)); + ui32 -= 0xB; + asm volatile ("vbroadcastss %0, %%ymm3" : : "m" (ui32)); + ui32 -= 0x3; + asm volatile ("vbroadcastss %0, %%ymm4" : : "m" (ui32)); + ui32 += 0xA; + asm volatile ("vbroadcastss %0, %%ymm5" : : "m" (ui32)); + ui32 -= 0x7; + asm volatile ("vbroadcastss %0, %%ymm6" : : "m" (ui32)); + ui32 -= 0xABABA; + asm volatile ("vbroadcastss %0, %%ymm7" : : "m" (ui32)); + + #ifndef __i386__ + ui32 += 0xF7; + asm volatile ("vbroadcastss %0, %%ymm8" : : "m" (ui32)); + ui32 -= 0x7; + asm volatile ("vbroadcastss %0, %%ymm9" : : "m" (ui32)); + ui32 += 0x2; + asm volatile ("vbroadcastss %0, %%ymm10" : : "m" (ui32)); + ui32 += 0xD; + asm volatile ("vbroadcastss %0, %%ymm11" : : "m" (ui32)); + ui32 -= 0x4; + asm volatile ("vbroadcastss %0, %%ymm12" : : "m" (ui32)); + ui32 -= 0xDD; + asm volatile ("vbroadcastss %0, %%ymm13" : : "m" (ui32)); + ui32 -= 0xABD; + asm volatile ("vbroadcastss %0, %%ymm14" : : "m" (ui32)); + ui32 += 0xBEBABF456; + asm volatile ("vbroadcastss %0, %%ymm15" : : "m" (ui32)); + #endif +} diff --git a/tools/testing/selftests/xsave/xsave_instruction.c b/tools/testing/selftests/xsave/xsave_instruction.c new file mode 100644 index 000000000000..2b610101511d --- /dev/null +++ b/tools/testing/selftests/xsave/xsave_instruction.c @@ -0,0 +1,83 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Test kernel support for XSAVE-managed features. + */ + +#include +#include +#include +#include +#include +#include +#include + +#include "../kselftest.h" +#include "xsave_common.h" + +static unsigned char *xsave_buf0, *xsave_buf1; + +static void set_ymm0_reg(uint32_t ui32) +{ + asm volatile ("vbroadcastss %0, %%ymm0" : : "m" (ui32)); +} + +static void dump_xsave_content(int xsave_size) +{ + XSAVE(xsave_buf0, SAVE_MASK); + dump_buffer(xsave_buf0, xsave_size); + ksft_print_msg("Entire contents of XSAVE is as above\n"); +} + +static void test_xsave_ymm_change(int xsave_size) +{ + const char *test_name = "xsave test after ymm change"; + uint32_t ui32_set = 0x1234, ui32_change = 0x5678; + int result = RESULT_ERROR; + + set_ymm0_reg(ui32_set); + XSAVE(xsave_buf0, SAVE_MASK); + set_ymm0_reg(ui32_change); + XSAVE(xsave_buf1, SAVE_MASK); + result = check_xsave_buf(xsave_buf0, xsave_buf1, xsave_size, test_name, + CHANGE); + check_result(result, test_name); +} + +static void test_xsave_xrstor(int xsave_size) +{ + const char *test_name = "xsave after xrstor test"; + int result = RESULT_ERROR; + + XSAVE(xsave_buf0, SAVE_MASK); + XRSTOR(xsave_buf0, SAVE_MASK); + XSAVE(xsave_buf1, SAVE_MASK); + result = check_xsave_buf(xsave_buf0, xsave_buf1, xsave_size, test_name, + NO_CHANGE); + check_result(result, test_name); +} + +int main(void) +{ + int xsave_size; + + ksft_print_header(); + ksft_set_plan(2); + + xsave_size = get_xsave_size(); + /* SDM XSAVE: misalignment to a 64-byte boundary will result in #GP */ + xsave_buf0 = aligned_alloc(64, xsave_size); + if (!xsave_buf0) + execution_failed("aligned_alloc xsave_buf0 failed\n"); + xsave_buf1 = aligned_alloc(64, xsave_size); + if (!xsave_buf1) + execution_failed("aligned_alloc xsave_buf1 failed\n"); + + populate_fpu_regs(); + /* Show the entire contents of xsave for issue debug */ + dump_xsave_content(xsave_size); + + test_xsave_ymm_change(xsave_size); + test_xsave_xrstor(xsave_size); + + ksft_exit(!ksft_get_fail_cnt()); +} From patchwork Wed Aug 4 09:19:10 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pengfei Xu X-Patchwork-Id: 12418231 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2906DC4320A for ; Wed, 4 Aug 2021 09:20:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 093F960FC4 for ; Wed, 4 Aug 2021 09:20:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236905AbhHDJUZ (ORCPT ); Wed, 4 Aug 2021 05:20:25 -0400 Received: from mga07.intel.com ([134.134.136.100]:53659 "EHLO mga07.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236371AbhHDJUZ (ORCPT ); Wed, 4 Aug 2021 05:20:25 -0400 X-IronPort-AV: E=McAfee;i="6200,9189,10065"; a="277642985" X-IronPort-AV: E=Sophos;i="5.84,293,1620716400"; d="scan'208";a="277642985" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 Aug 2021 02:20:12 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.84,293,1620716400"; d="scan'208";a="480082824" Received: from fedora29.sh.intel.com ([10.239.182.87]) by fmsmga008.fm.intel.com with ESMTP; 04 Aug 2021 02:20:10 -0700 From: Pengfei Xu To: Shuah Khan , linux-kselftest , linux-kernel Cc: Pengfei Xu , Heng Su , Yu Yu-cheng , Yu Fenghua , Hansen Dave , Luck Tony , Mehta Sohil , Chen Yu C Subject: [RFC PATCH v3 2/2] selftests/xsave: add xsave test during and after signal handling Date: Wed, 4 Aug 2021 17:19:10 +0800 Message-Id: <015c376c4de69cef7153eacc6f41bffaa604a80f.1628067281.git.pengfei.xu@intel.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org In order to ensure that the XSAVE content in the same process is not affected by signal handling, this case tests that the XSAVE content of the process should not change during and after the nested signal handling. Signed-off-by: Pengfei Xu --- tools/testing/selftests/xsave/.gitignore | 1 + tools/testing/selftests/xsave/Makefile | 2 +- .../selftests/xsave/xsave_signal_handle.c | 184 ++++++++++++++++++ 3 files changed, 186 insertions(+), 1 deletion(-) create mode 100644 tools/testing/selftests/xsave/xsave_signal_handle.c diff --git a/tools/testing/selftests/xsave/.gitignore b/tools/testing/selftests/xsave/.gitignore index 00b9970360c4..b448d36186f3 100644 --- a/tools/testing/selftests/xsave/.gitignore +++ b/tools/testing/selftests/xsave/.gitignore @@ -1,2 +1,3 @@ # SPDX-License-Identifier: GPL-2.0-only xsave_instruction +xsave_signal_handle diff --git a/tools/testing/selftests/xsave/Makefile b/tools/testing/selftests/xsave/Makefile index dafdb0abdeb3..fedae2778297 100644 --- a/tools/testing/selftests/xsave/Makefile +++ b/tools/testing/selftests/xsave/Makefile @@ -1,6 +1,6 @@ # SPDX-License-Identifier: GPL-2.0-only CFLAGS := -g -Wall -mxsave -O2 -TEST_GEN_PROGS := xsave_instruction +TEST_GEN_PROGS := xsave_instruction xsave_signal_handle include ../lib.mk diff --git a/tools/testing/selftests/xsave/xsave_signal_handle.c b/tools/testing/selftests/xsave/xsave_signal_handle.c new file mode 100644 index 000000000000..0afcba3a1bd5 --- /dev/null +++ b/tools/testing/selftests/xsave/xsave_signal_handle.c @@ -0,0 +1,184 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * It's for xsave/xrstor during signal handling tests + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "../kselftest.h" +#include "xsave_common.h" + +static unsigned char *xsave_buf0, *xsave_buf1, *xsave_buf2, *xsave_buf3; +static int result[2]; + +static void change_fpu_content(uint32_t ui32_random, double flt) +{ + asm volatile ("fldl %0" : : "m" (flt)); + asm volatile ("vbroadcastss %0, %%ymm0" : : "m" (ui32_random)); + asm volatile ("vbroadcastss %0, %%ymm1" : : "m" (ui32_random)); + asm volatile ("vbroadcastss %0, %%ymm2" : : "m" (ui32_random)); + asm volatile ("vbroadcastss %0, %%ymm3" : : "m" (ui32_random)); + asm volatile ("vbroadcastss %0, %%ymm4" : : "m" (ui32_random)); + asm volatile ("vbroadcastss %0, %%ymm5" : : "m" (ui32_random)); + asm volatile ("vbroadcastss %0, %%ymm6" : : "m" (ui32_random)); + asm volatile ("vbroadcastss %0, %%ymm7" : : "m" (ui32_random)); + #ifndef __i386__ + asm volatile ("vbroadcastss %0, %%ymm8" : : "m" (ui32_random)); + asm volatile ("vbroadcastss %0, %%ymm9" : : "m" (ui32_random)); + asm volatile ("vbroadcastss %0, %%ymm10" : : "m" (ui32_random)); + asm volatile ("vbroadcastss %0, %%ymm11" : : "m" (ui32_random)); + asm volatile ("vbroadcastss %0, %%ymm12" : : "m" (ui32_random)); + asm volatile ("vbroadcastss %0, %%ymm13" : : "m" (ui32_random)); + asm volatile ("vbroadcastss %0, %%ymm14" : : "m" (ui32_random)); + asm volatile ("vbroadcastss %0, %%ymm15" : : "m" (ui32_random)); + #endif +} + +static void usr1_handler(int signum, siginfo_t *info, void *__ctxp) +{ + uint32_t ui32_random; + double flt; + int xsave_size; + const char *test_name = "Child XSAVE should not change in nested signal"; + + ui32_random = rand(); + flt = ui32_random/10000.0; + if (signum == SIGUSR1) { + ksft_print_msg("SIGUSR1:0x%x changed fld:%f & ymm0-15:0x%x\n", + SIGUSR1, flt, ui32_random); + change_fpu_content(ui32_random, flt); + } + xsave_size = get_xsave_size(); + XSAVE(xsave_buf2, SAVE_MASK); + raise(SIGUSR2); + XSAVE(xsave_buf3, SAVE_MASK); + result[0] = check_xsave_buf(xsave_buf2, xsave_buf2, xsave_size, test_name, + NO_CHANGE); +} + +static void usr2_handler(int signum, siginfo_t *info, void *__ctxp) +{ + uint32_t ui32_random; + double flt; + + ui32_random = rand(); + flt = ui32_random/10000.0; + if (signum == SIGUSR2) { + ksft_print_msg("SIGUSR2:0x%x changed fld:%f & ymm0-15:0x%x\n", + SIGUSR2, flt, ui32_random); + change_fpu_content(ui32_random, flt); + } +} + +static void set_signal_handle(void) +{ + struct sigaction sigact; + + memset(&sigact, 0, sizeof(sigact)); + if (sigemptyset(&sigact.sa_mask)) + execution_failed("FAIL: sigemptyset error\n"); + + sigact.sa_flags = SA_SIGINFO; + + sigact.sa_sigaction = usr1_handler; + if (sigaction(SIGUSR1, &sigact, NULL)) + execution_failed("FAIL: SIGUSR1 handling failed\n"); + + sigact.sa_sigaction = usr2_handler; + if (sigaction(SIGUSR2, &sigact, NULL)) + execution_failed("FAIL: SIGUSR2 handling failed\n"); +} + +static void sig_handle_xsave_test(void) +{ + int i, loop_times = 100, xsave_size; + const char *sig_test_name0 = "Child XSAVE was same in nested signal test"; + const char *sig_test_name1 = "Child XSAVE content was same after signal"; + + xsave_size = get_xsave_size(); + /* SDM XSAVE: misalignment to a 64-byte boundary will result in #GP */ + xsave_buf0 = aligned_alloc(64, xsave_size); + if (!xsave_buf0) + execution_failed("aligned_alloc xsave_buf0 failed\n"); + xsave_buf1 = aligned_alloc(64, xsave_size); + if (!xsave_buf1) + execution_failed("aligned_alloc xsave_buf1 failed\n"); + xsave_buf2 = aligned_alloc(64, xsave_size); + if (!xsave_buf2) + execution_failed("aligned_alloc xsave_buf2 failed\n"); + xsave_buf3 = aligned_alloc(64, xsave_size); + if (!xsave_buf3) + execution_failed("aligned_alloc xsave_buf3 failed\n"); + + srand(time(NULL)); + result[0] = RESULT_PASS; + result[1] = RESULT_PASS; + + XSAVE(xsave_buf0, SAVE_MASK); + for (i = 1; i <= loop_times; i++) { + raise(SIGUSR1); + XSAVE(xsave_buf1, SAVE_MASK); + result[1] = check_xsave_buf(xsave_buf0, xsave_buf1, xsave_size, + sig_test_name1, NO_CHANGE); + if (result[1] != RESULT_PASS) + break; + } + + check_result(result[0], sig_test_name0); + check_result(result[1], sig_test_name1); +} + +static void test_xsave_sig_handle(void) +{ + const char *test_name0 = "xsave in child nested signal handling test"; + const char *test_name1 = "xsave after child signal handling test"; + pid_t child; + int status, fd[2], readbuf[2]; + + set_signal_handle(); + + /* Use pipe to transfer test result of child process to parent process */ + if (pipe(fd) < 0) + execution_failed("FAIL: create pipe failed\n"); + + /* Use child process testing to avoid abnormal blocking the next test */ + child = fork(); + if (child < 0) + execution_failed("FAIL: create child pid failed\n"); + else if (child == 0) { + populate_fpu_regs(); + sig_handle_xsave_test(); + close(fd[0]); + write(fd[1], &result, sizeof(result)); + } else { + if (waitpid(child, &status, 0) != child || + !WIFEXITED(status)) + execution_failed("FAIL: Child died unexpectedly\n"); + else { + close(fd[1]); + read(fd[0], &readbuf, sizeof(readbuf)); + + check_result(readbuf[0], test_name0); + check_result(readbuf[1], test_name1); + } + } +} + +int main(void) +{ + ksft_print_header(); + ksft_set_plan(2); + + test_xsave_sig_handle(); + + ksft_exit(!ksft_get_fail_cnt()); +}