From patchwork Tue Aug 9 15:03:30 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Jason A. Donenfeld" X-Patchwork-Id: 1664923 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: bilbo.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=zx2c4.com header.i=@zx2c4.com header.a=rsa-sha256 header.s=20210105 header.b=jpRb/t7v; dkim-atps=neutral Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by bilbo.ozlabs.org (Postfix) with ESMTPS id 4M2GYt0N2tz9s5W for ; Wed, 10 Aug 2022 01:04:16 +1000 (AEST) Received: from localhost ([::1]:46672 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oLQmC-0000LZ-TH for incoming@patchwork.ozlabs.org; Tue, 09 Aug 2022 11:04:12 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:50364) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oLQlq-0000LL-9i; Tue, 09 Aug 2022 11:03:50 -0400 Received: from ams.source.kernel.org ([2604:1380:4601:e00::1]:39476) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oLQln-0007OD-SA; Tue, 09 Aug 2022 11:03:50 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 18BB0B81142; Tue, 9 Aug 2022 15:03:45 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E63EEC433D7; Tue, 9 Aug 2022 15:03:42 +0000 (UTC) Authentication-Results: smtp.kernel.org; dkim=pass (1024-bit key) header.d=zx2c4.com header.i=@zx2c4.com header.b="jpRb/t7v" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=zx2c4.com; s=20210105; t=1660057421; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=dGzZHj04aA5X2UDbXxQrQK5LQmHEsakEtiTOu+eT8VU=; b=jpRb/t7v9Y+PYze328yqdRM4im+O3OZoZpkS3GxtBCXJ9XzKeSfTTlBLjS8od3G3RVXgyg KShxAudlIUvJE5shpXcNuub8VMW0Sf4NiyvglRnDkyahdZJi3tqLyySxxBIdnIl0noenTg C7W/uPlg3qpn4pzOakCIKd/OuBLKC6w= Received: by mail.zx2c4.com (ZX2C4 Mail Server) with ESMTPSA id fc72e02c (TLSv1.3:TLS_AES_256_GCM_SHA384:256:NO); Tue, 9 Aug 2022 15:03:40 +0000 (UTC) From: "Jason A. Donenfeld" To: David Hildenbrand , qemu-s390x@nongnu.org, qemu-devel@nongnu.org Cc: "Jason A. Donenfeld" , Thomas Huth , Christian Borntraeger , Richard Henderson , Cornelia Huck , Harald Freudenberger , Holger Dengler Subject: [PATCH v7 1/2] target/s390x: support SHA-512 extensions Date: Tue, 9 Aug 2022 17:03:30 +0200 Message-Id: <20220809150331.84296-1-Jason@zx2c4.com> In-Reply-To: References: MIME-Version: 1.0 Received-SPF: pass client-ip=2604:1380:4601:e00::1; envelope-from=SRS0=vIKK=YN=zx2c4.com=Jason@kernel.org; helo=ams.source.kernel.org X-Spam_score_int: -67 X-Spam_score: -6.8 X-Spam_bar: ------ X-Spam_report: (-6.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HEADER_FROM_DIFFERENT_DOMAINS=0.249, RCVD_IN_DNSWL_HI=-5, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" In order to fully support MSA_EXT_5, we have to support the SHA-512 special instructions. So implement those. The implementation began as something TweetNacl-like, and then was adjusted to be useful here. It's not very beautiful, but it is quite short and compact, which is what we're going for. Cc: Thomas Huth Cc: David Hildenbrand Cc: Christian Borntraeger Cc: Richard Henderson Cc: Cornelia Huck Cc: Harald Freudenberger Cc: Holger Dengler Signed-off-by: Jason A. Donenfeld --- target/s390x/gen-features.c | 3 + target/s390x/tcg/crypto_helper.c | 157 +++++++++++++++++++++++++++++++ 2 files changed, 160 insertions(+) diff --git a/target/s390x/gen-features.c b/target/s390x/gen-features.c index ad140184b9..85ab69d04e 100644 --- a/target/s390x/gen-features.c +++ b/target/s390x/gen-features.c @@ -749,6 +749,9 @@ static uint16_t qemu_V7_0[] = { */ static uint16_t qemu_MAX[] = { S390_FEAT_VECTOR_ENH2, + S390_FEAT_MSA_EXT_5, + S390_FEAT_KIMD_SHA_512, + S390_FEAT_KLMD_SHA_512, }; /****** END FEATURE DEFS ******/ diff --git a/target/s390x/tcg/crypto_helper.c b/target/s390x/tcg/crypto_helper.c index 138d9e7ad9..4d45de8faa 100644 --- a/target/s390x/tcg/crypto_helper.c +++ b/target/s390x/tcg/crypto_helper.c @@ -1,10 +1,12 @@ /* * s390x crypto helpers * + * Copyright (C) 2022 Jason A. Donenfeld . All Rights Reserved. * Copyright (c) 2017 Red Hat Inc * * Authors: * David Hildenbrand + * Jason A. Donenfeld * * This work is licensed under the terms of the GNU GPL, version 2 or later. * See the COPYING file in the top-level directory. @@ -18,6 +20,153 @@ #include "exec/exec-all.h" #include "exec/cpu_ldst.h" +static uint64_t R(uint64_t x, int c) { return (x >> c) | (x << (64 - c)); } +static uint64_t Ch(uint64_t x, uint64_t y, uint64_t z) { return (x & y) ^ (~x & z); } +static uint64_t Maj(uint64_t x, uint64_t y, uint64_t z) { return (x & y) ^ (x & z) ^ (y & z); } +static uint64_t Sigma0(uint64_t x) { return R(x, 28) ^ R(x, 34) ^ R(x, 39); } +static uint64_t Sigma1(uint64_t x) { return R(x, 14) ^ R(x, 18) ^ R(x, 41); } +static uint64_t sigma0(uint64_t x) { return R(x, 1) ^ R(x, 8) ^ (x >> 7); } +static uint64_t sigma1(uint64_t x) { return R(x, 19) ^ R(x, 61) ^ (x >> 6); } + +static const uint64_t K[80] = { + 0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL, 0xb5c0fbcfec4d3b2fULL, + 0xe9b5dba58189dbbcULL, 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL, + 0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL, 0xd807aa98a3030242ULL, + 0x12835b0145706fbeULL, 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL, + 0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL, 0x9bdc06a725c71235ULL, + 0xc19bf174cf692694ULL, 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL, + 0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL, 0x2de92c6f592b0275ULL, + 0x4a7484aa6ea6e483ULL, 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL, + 0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL, 0xb00327c898fb213fULL, + 0xbf597fc7beef0ee4ULL, 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL, + 0x06ca6351e003826fULL, 0x142929670a0e6e70ULL, 0x27b70a8546d22ffcULL, + 0x2e1b21385c26c926ULL, 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL, + 0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL, 0x81c2c92e47edaee6ULL, + 0x92722c851482353bULL, 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL, + 0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL, 0xd192e819d6ef5218ULL, + 0xd69906245565a910ULL, 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL, + 0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL, 0x2748774cdf8eeb99ULL, + 0x34b0bcb5e19b48a8ULL, 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL, + 0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL, 0x748f82ee5defb2fcULL, + 0x78a5636f43172f60ULL, 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL, + 0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL, 0xbef9a3f7b2c67915ULL, + 0xc67178f2e372532bULL, 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL, + 0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL, 0x06f067aa72176fbaULL, + 0x0a637dc5a2c898a6ULL, 0x113f9804bef90daeULL, 0x1b710b35131c471bULL, + 0x28db77f523047d84ULL, 0x32caab7b40c72493ULL, 0x3c9ebe0a15c9bebcULL, + 0x431d67c49c100d4cULL, 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL, + 0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL +}; + +static int kimd_sha512(CPUS390XState *env, uintptr_t ra, uint64_t parameter_block, + uint64_t *message_reg, uint64_t *len_reg, uint8_t *stack_buffer) +{ + enum { MAX_BLOCKS_PER_RUN = 64 }; /* This is arbitrary, just to keep interactivity. */ + uint64_t z[8], b[8], a[8], w[16], t; + uint64_t message = message_reg ? *message_reg : 0, len = *len_reg, processed = 0; + int i, j, message_reg_len = 64, blocks = 0, cc = 0; + + if (!(env->psw.mask & PSW_MASK_64)) { + len = (uint32_t)len; + message_reg_len = (env->psw.mask & PSW_MASK_32) ? 32 : 24; + } + + for (i = 0; i < 8; ++i) { + z[i] = a[i] = cpu_ldq_be_data_ra(env, wrap_address(env, parameter_block + 8 * i), ra); + } + + while (len >= 128) { + if (++blocks > MAX_BLOCKS_PER_RUN) { + cc = 3; + break; + } + + for (i = 0; i < 16; ++i) { + if (message) { + w[i] = cpu_ldq_be_data_ra(env, wrap_address(env, message + 8 * i), ra); + } else { + w[i] = be64_to_cpu(((uint64_t *)stack_buffer)[i]); + } + } + + for (i = 0; i < 80; ++i) { + for (j = 0; j < 8; ++j) { + b[j] = a[j]; + } + t = a[7] + Sigma1(a[4]) + Ch(a[4], a[5], a[6]) + K[i] + w[i % 16]; + b[7] = t + Sigma0(a[0]) + Maj(a[0], a[1], a[2]); + b[3] += t; + for (j = 0; j < 8; ++j) { + a[(j + 1) % 8] = b[j]; + } + if (i % 16 == 15) { + for (j = 0; j < 16; ++j) { + w[j] += w[(j + 9) % 16] + sigma0(w[(j + 1) % 16]) + sigma1(w[(j + 14) % 16]); + } + } + } + + for (i = 0; i < 8; ++i) { + a[i] += z[i]; + z[i] = a[i]; + } + + if (message) { + message += 128; + } else { + stack_buffer += 128; + } + len -= 128; + processed += 128; + } + + for (i = 0; i < 8; ++i) { + cpu_stq_be_data_ra(env, wrap_address(env, parameter_block + 8 * i), z[i], ra); + } + + if (message_reg) { + *message_reg = deposit64(*message_reg, 0, message_reg_len, message); + } + *len_reg -= processed; + return cc; +} + +static int klmd_sha512(CPUS390XState *env, uintptr_t ra, uint64_t parameter_block, + uint64_t *message_reg, uint64_t *len_reg) +{ + uint8_t x[256]; + uint64_t i, message, len; + int j, message_reg_len = 64, cc; + + cc = kimd_sha512(env, ra, parameter_block, message_reg, len_reg, NULL); + if (cc) { + return cc; + } + + message = *message_reg; + len = *len_reg; + if (!(env->psw.mask & PSW_MASK_64)) { + len = (uint32_t)len; + message_reg_len = (env->psw.mask & PSW_MASK_32) ? 32 : 24; + } + + for (i = 0; i < len; ++i) { + x[i] = cpu_ldub_data_ra(env, wrap_address(env, message + i), ra); + } + memset(x + i, 0, sizeof(x) - i); + x[i] = 128; + i = i < 112 ? 128 : 256; + for (j = 0; j < 16; ++j) { + x[i - 16 + j] = cpu_ldub_data_ra(env, wrap_address(env, parameter_block + 64 + j), ra); + } + if (kimd_sha512(env, ra, parameter_block, NULL, &i, x)) { + g_assert_not_reached(); /* It must handle at least 2 blocks. */ + } + *message_reg = deposit64(*message_reg, 0, message_reg_len, message + len); + *len_reg -= len; + return 0; +} + uint32_t HELPER(msa)(CPUS390XState *env, uint32_t r1, uint32_t r2, uint32_t r3, uint32_t type) { @@ -52,6 +201,14 @@ uint32_t HELPER(msa)(CPUS390XState *env, uint32_t r1, uint32_t r2, uint32_t r3, cpu_stb_data_ra(env, param_addr, subfunc[i], ra); } break; + case 3: /* CPACF_*_SHA_512 */ + switch (type) { + case S390_FEAT_TYPE_KIMD: + return kimd_sha512(env, ra, env->regs[1], &env->regs[r2], &env->regs[r2 + 1], NULL); + case S390_FEAT_TYPE_KLMD: + return klmd_sha512(env, ra, env->regs[1], &env->regs[r2], &env->regs[r2 + 1]); + } + break; default: /* we don't implement any other subfunction yet */ g_assert_not_reached(); From patchwork Tue Aug 9 15:03:31 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Jason A. Donenfeld" X-Patchwork-Id: 1664929 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: bilbo.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=zx2c4.com header.i=@zx2c4.com header.a=rsa-sha256 header.s=20210105 header.b=T0FWEKKJ; dkim-atps=neutral Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by bilbo.ozlabs.org (Postfix) with ESMTPS id 4M2Gby0bfHz9s5W for ; Wed, 10 Aug 2022 01:06:06 +1000 (AEST) Received: from localhost ([::1]:49048 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oLQo0-00022x-6K for incoming@patchwork.ozlabs.org; Tue, 09 Aug 2022 11:06:04 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:50394) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oLQlu-0000Pa-7D; Tue, 09 Aug 2022 11:03:54 -0400 Received: from ams.source.kernel.org ([2604:1380:4601:e00::1]:39506) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oLQls-0007OR-6E; Tue, 09 Aug 2022 11:03:53 -0400 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 7328EB8111F; Tue, 9 Aug 2022 15:03:50 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2C1C4C433D6; Tue, 9 Aug 2022 15:03:48 +0000 (UTC) Authentication-Results: smtp.kernel.org; dkim=pass (1024-bit key) header.d=zx2c4.com header.i=@zx2c4.com header.b="T0FWEKKJ" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=zx2c4.com; s=20210105; t=1660057426; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=frqi9iy3ndItafroauwLFnPUa2oIHvr1IXG3VK7cNdM=; b=T0FWEKKJzQJLZFPeCDX/vImvBQIrRgmf+R/QWs6IL/yPPUEw+5mvYNZFYHLcZms//D6daj I7xNJR2TrSFr1E7r7V0yQsAC8IzXsxJmkOcni5K33fNbHOq6/Hw5kk17So1NF69jPdsbyj aXlcDXjBudAOh6B6HojfHTOga+slB1o= Received: by mail.zx2c4.com (ZX2C4 Mail Server) with ESMTPSA id 16dbfac9 (TLSv1.3:TLS_AES_256_GCM_SHA384:256:NO); Tue, 9 Aug 2022 15:03:46 +0000 (UTC) From: "Jason A. Donenfeld" To: David Hildenbrand , qemu-s390x@nongnu.org, qemu-devel@nongnu.org Cc: "Jason A. Donenfeld" , Thomas Huth , Christian Borntraeger , Richard Henderson , Cornelia Huck , Harald Freudenberger , Holger Dengler Subject: [PATCH v7 2/2] target/s390x: support PRNO_TRNG instruction Date: Tue, 9 Aug 2022 17:03:31 +0200 Message-Id: <20220809150331.84296-2-Jason@zx2c4.com> In-Reply-To: <20220809150331.84296-1-Jason@zx2c4.com> References: <20220809150331.84296-1-Jason@zx2c4.com> MIME-Version: 1.0 Received-SPF: pass client-ip=2604:1380:4601:e00::1; envelope-from=SRS0=vIKK=YN=zx2c4.com=Jason@kernel.org; helo=ams.source.kernel.org X-Spam_score_int: -67 X-Spam_score: -6.8 X-Spam_bar: ------ X-Spam_report: (-6.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HEADER_FROM_DIFFERENT_DOMAINS=0.249, RCVD_IN_DNSWL_HI=-5, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" In order for hosts running inside of TCG to initialize the kernel's random number generator, we should support the PRNO_TRNG instruction, backed in the usual way with the qemu_guest_getrandom helper. This is confirmed working on Linux 5.19. Cc: Thomas Huth Cc: David Hildenbrand Cc: Christian Borntraeger Cc: Richard Henderson Cc: Cornelia Huck Cc: Harald Freudenberger Cc: Holger Dengler Signed-off-by: Jason A. Donenfeld --- target/s390x/gen-features.c | 1 + target/s390x/tcg/crypto_helper.c | 30 ++++++++++++++++++++++++++++++ 2 files changed, 31 insertions(+) diff --git a/target/s390x/gen-features.c b/target/s390x/gen-features.c index 85ab69d04e..423ae44315 100644 --- a/target/s390x/gen-features.c +++ b/target/s390x/gen-features.c @@ -752,6 +752,7 @@ static uint16_t qemu_MAX[] = { S390_FEAT_MSA_EXT_5, S390_FEAT_KIMD_SHA_512, S390_FEAT_KLMD_SHA_512, + S390_FEAT_PRNO_TRNG, }; /****** END FEATURE DEFS ******/ diff --git a/target/s390x/tcg/crypto_helper.c b/target/s390x/tcg/crypto_helper.c index 4d45de8faa..e155ae1f54 100644 --- a/target/s390x/tcg/crypto_helper.c +++ b/target/s390x/tcg/crypto_helper.c @@ -14,6 +14,7 @@ #include "qemu/osdep.h" #include "qemu/main-loop.h" +#include "qemu/guest-random.h" #include "s390x-internal.h" #include "tcg_s390x.h" #include "exec/helper-proto.h" @@ -167,6 +168,31 @@ static int klmd_sha512(CPUS390XState *env, uintptr_t ra, uint64_t parameter_bloc return 0; } +static void fill_buf_random(CPUS390XState *env, uintptr_t ra, + uint64_t *buf_reg, uint64_t *len_reg) +{ + uint8_t tmp[256]; + uint64_t len = *len_reg; + int message_reg_len = 64; + + if (!(env->psw.mask & PSW_MASK_64)) { + len = (uint32_t)len; + message_reg_len = (env->psw.mask & PSW_MASK_32) ? 32 : 24; + } + + while (len) { + size_t block = MIN(len, sizeof(tmp)); + + qemu_guest_getrandom_nofail(tmp, block); + for (size_t i = 0; i < block; ++i) { + cpu_stb_data_ra(env, wrap_address(env, *buf_reg), tmp[i], ra); + *buf_reg = deposit64(*buf_reg, 0, message_reg_len, *buf_reg + 1); + --*len_reg; + } + len -= block; + } +} + uint32_t HELPER(msa)(CPUS390XState *env, uint32_t r1, uint32_t r2, uint32_t r3, uint32_t type) { @@ -209,6 +235,10 @@ uint32_t HELPER(msa)(CPUS390XState *env, uint32_t r1, uint32_t r2, uint32_t r3, return klmd_sha512(env, ra, env->regs[1], &env->regs[r2], &env->regs[r2 + 1]); } break; + case 114: /* CPACF_PRNO_TRNG */ + fill_buf_random(env, ra, &env->regs[r1], &env->regs[r1 + 1]); + fill_buf_random(env, ra, &env->regs[r2], &env->regs[r2 + 1]); + break; default: /* we don't implement any other subfunction yet */ g_assert_not_reached();