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Mon, 21 Sep 2026 20:08:40 +0000 (GMT) From: Eric Farman To: qemu-devel@nongnu.org Cc: qemu-s390x@nongnu.org, Matthew Rosato , Cornelia Huck , Harald Freudenberger , Eric Farman Subject: [PULL 16/33] target/s390x: Support protected key AES CTR for cpacf kmctr instruction Date: Mon, 21 Sep 2026 16:08:13 -0400 Message-ID: <20260921200830.1302919-17-farman@linux.ibm.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260921200830.1302919-1-farman@linux.ibm.com> References: <20260921200830.1302919-1-farman@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: eCOdnQLvfoGGmcj5Jl9QVt7twfDUMoc4 X-Proofpoint-Spam-Info: AW1haW4tMjYwOTIxMDI5NCBTYWx0ZWRfX0V5ZJeh86z0i EajwKYzM+GLgYeI9zpp+8Ky04HliRIet1F1kGbpO9CnN9/LCTXbRSpXSBA3XHuYhILn0sv97ro4 8Zp3nYuUvWncLXHN+1lCjdhPDblp0g4= X-Authority-Analysis: v=2.4 cv=FLiOVOos c=1 sm=1 tr=0 ts=6ab18ecb cx=c_pps a=5BHTudwdYE3Te8bg5FgnPg==:117 a=5BHTudwdYE3Te8bg5FgnPg==:17 a=VdqzKS8jKosA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=RzCfie-kr_QcCd8fBx8p:22 a=VwQbUJbxAAAA:8 a=VnNF1IyMAAAA:8 a=s7YHn70HNGjeB9XmMgkA:9 X-Proofpoint-GUID: eCOdnQLvfoGGmcj5Jl9QVt7twfDUMoc4 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTIxMDI5NCBTYWx0ZWRfX+IppIdBw8uKp BS7du/munQFC8TzbXAoYB7Pj8fa9fiPM4V28bGw02M5/9oX2szMDAer3YqctOA8YN1yW9P0R4sQ utFu6wyr3Vae3AdO466jrjXZiOntR4iV5VxiU9Hz5tCSMQmmrJIn0LjzJB4oBUcH3gIDwELUndq J+STFU+fAJWmWWiZM6CB/hv/W0WUh7xanE1ZixAYirfUpBmxZBJk8YLuTdAmARIRp0883oYqLQj HZWcQGPBVCm1M2/MLDIXvSfHS83QRbkBoW14foAu9D3u3Noa/0mHrd6KwmNaTA1FFwFMvXi9JJk b6vcCrOeBqBMa7dIKVcKcfnIzXSx9yBGBNa40LaCrZuLo+csZ2jWd3GVXfGCE/dYNWL/iyaDAJp 3pXkux3zPWaQdPGbSL8MSMnkPEAkjJ/gojTXHk9DNAcxJ4/OPJM68YLE4o0eR5L1xbAIT6/9088 a7fz1hrwEdtOhjRDesQ== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-09-21_05,2026-09-21_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 impostorscore=0 phishscore=0 spamscore=0 clxscore=1015 suspectscore=0 bulkscore=0 lowpriorityscore=0 priorityscore=1501 malwarescore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2609040000 definitions=main-2609210294 Received-SPF: pass client-ip=148.163.158.5; envelope-from=farman@linux.ibm.com; helo=mx0b-001b2d01.pphosted.com X-Spam_score_int: -26 X-Spam_score: -2.7 X-Spam_bar: -- X-Spam_report: (-2.7 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 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: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: Harald Freudenberger Support the subfunctions CPACF_KMCTR_PAES_128, CPACF_KMCTR_PAES_192 and CPACF_KMCTR_PAES_256 for the cpacf kmctr instruction. Signed-off-by: Harald Freudenberger Reviewed-by: Ilya Leoshkevich Link: https://lore.kernel.org/qemu-devel/20260824083204.40877-17-freude@linux.ibm.com Signed-off-by: Eric Farman --- target/s390x/gen-features.c | 3 ++ target/s390x/tcg/cpacf.h | 5 ++ target/s390x/tcg/cpacf_aes.c | 92 ++++++++++++++++++++++++++++++++ target/s390x/tcg/crypto_helper.c | 7 +++ 4 files changed, 107 insertions(+) diff --git a/target/s390x/gen-features.c b/target/s390x/gen-features.c index eb7c00a448..01149a04c5 100644 --- a/target/s390x/gen-features.c +++ b/target/s390x/gen-features.c @@ -946,6 +946,9 @@ static uint16_t qemu_MAX[] = { S390_FEAT_KMCTR_AES_128, S390_FEAT_KMCTR_AES_192, S390_FEAT_KMCTR_AES_256, + S390_FEAT_KMCTR_EAES_128, + S390_FEAT_KMCTR_EAES_192, + S390_FEAT_KMCTR_EAES_256, S390_FEAT_PCC_XTS_AES_128, S390_FEAT_PCC_XTS_AES_256, S390_FEAT_PCKMO_AES_128, diff --git a/target/s390x/tcg/cpacf.h b/target/s390x/tcg/cpacf.h index 73cb564c0b..15fd860e3a 100644 --- a/target/s390x/tcg/cpacf.h +++ b/target/s390x/tcg/cpacf.h @@ -48,5 +48,10 @@ int cpacf_paes_cbc(CPUS390XState *env, const int mmu_idx, uintptr_t ra, uint64_t param_addr, uint64_t *dst_ptr_reg, uint64_t *src_ptr_reg, uint64_t *src_len_reg, uint32_t type, uint8_t fc, uint8_t mod); +int cpacf_paes_ctr(CPUS390XState *env, const int mmu_idx, uintptr_t ra, + uint64_t param_addr, uint64_t *dst_ptr_reg, + uint64_t *src_ptr_reg, uint64_t *src_len_reg, + uint64_t *ctr_ptr_reg, uint32_t type, + uint8_t fc, uint8_t mod); #endif /* S390X_CPACF_H */ diff --git a/target/s390x/tcg/cpacf_aes.c b/target/s390x/tcg/cpacf_aes.c index e155387fa8..52f8644468 100644 --- a/target/s390x/tcg/cpacf_aes.c +++ b/target/s390x/tcg/cpacf_aes.c @@ -723,3 +723,95 @@ int cpacf_paes_cbc(CPUS390XState *env, const int mmu_idx, uintptr_t ra, return !len ? 0 : 3; } + +int cpacf_paes_ctr(CPUS390XState *env, const int mmu_idx, uintptr_t ra, + uint64_t param_addr, uint64_t *dst_ptr_reg, + uint64_t *src_ptr_reg, uint64_t *src_len_reg, + uint64_t *ctr_ptr_reg, uint32_t type, + uint8_t fc, uint8_t mod) +{ + enum { MAX_BLOCKS_PER_RUN = 8192 / AES_BLOCK_SIZE }; + uint8_t in[AES_BLOCK_SIZE], out[AES_BLOCK_SIZE]; + uint8_t ctr[AES_BLOCK_SIZE], key[32], wkvp[32]; + uint64_t len = *src_len_reg, done = 0; + int i, keysize, addr_reg_size; + AES_KEY exkey; + + g_assert(type == S390_FEAT_TYPE_KMCTR); + + switch (fc) { + case CPACF_KMCTR_PAES_128: + keysize = 16; + break; + case CPACF_KMCTR_PAES_192: + keysize = 24; + break; + case CPACF_KMCTR_PAES_256: + keysize = 32; + break; + default: + g_assert_not_reached(); + } + + /* check addressing mode, raise exception if not supported here */ + addr_reg_size = get_address_bitsize(env); + switch (addr_reg_size) { + case 64: + break; + case 32: + len = (uint32_t)len; + break; + default: + tcg_s390_program_interrupt(env, PGM_SPECIFICATION, ra); + } + + /* early bail out if length is zero */ + if (!len) { + return 0; + } + + /* length has to be properly aligned. */ + if (!QEMU_IS_ALIGNED(len, AES_BLOCK_SIZE)) { + tcg_s390_program_interrupt(env, PGM_SPECIFICATION, ra); + } + + /* fetch and check wkvp from param block */ + read_guest_wrap_u8(env, mmu_idx, ra, + param_addr + keysize, wkvp, sizeof(wkvp)); + if (memcmp(wkvp, protkey_wkvp, sizeof(wkvp))) { + /* wkvp mismatch -> return with cc 1 */ + return 1; + } + + /* fetch protected key from param block */ + read_guest_wrap_u8(env, mmu_idx, ra, param_addr, key, keysize); + /* decrypt the protected key */ + decrypt_protkey(key, keysize); + + /* expand key */ + AES_set_encrypt_key(key, keysize * 8, &exkey); + + /* process up to MAX_BLOCKS_PER_RUN aes blocks */ + for (i = 0; i < MAX_BLOCKS_PER_RUN && len >= AES_BLOCK_SIZE; i++) { + /* read in nonce/ctr => ctr */ + aes_read_block(env, mmu_idx, ra, *ctr_ptr_reg + done, ctr); + /* read in one block of input data => in */ + aes_read_block(env, mmu_idx, ra, *src_ptr_reg + done, in); + /* encrypt ctr and xor with in => out */ + AES_ctr_encrypt(in, out, ctr, &exkey); + /* write out the processed block */ + aes_write_block(env, mmu_idx, ra, *dst_ptr_reg + done, out); + len -= AES_BLOCK_SIZE; + done += AES_BLOCK_SIZE; + } + + *src_ptr_reg = deposit64(*src_ptr_reg, 0, addr_reg_size, + *src_ptr_reg + done); + *dst_ptr_reg = deposit64(*dst_ptr_reg, 0, addr_reg_size, + *dst_ptr_reg + done); + *ctr_ptr_reg = deposit64(*ctr_ptr_reg, 0, addr_reg_size, + *ctr_ptr_reg + done); + *src_len_reg -= done; + + return !len ? 0 : 3; +} diff --git a/target/s390x/tcg/crypto_helper.c b/target/s390x/tcg/crypto_helper.c index 8141f833a3..44fb7611cd 100644 --- a/target/s390x/tcg/crypto_helper.c +++ b/target/s390x/tcg/crypto_helper.c @@ -174,6 +174,13 @@ static int cpacf_kmctr(CPUS390XState *env, const int mmu_idx, uintptr_t ra, &env->regs[r1], &env->regs[r2], &env->regs[r2 + 1], &env->regs[r3], S390_FEAT_TYPE_KMCTR, fc, mod); break; + case CPACF_KMCTR_PAES_128: + case CPACF_KMCTR_PAES_192: + case CPACF_KMCTR_PAES_256: + rc = cpacf_paes_ctr(env, mmu_idx, ra, env->regs[1], + &env->regs[r1], &env->regs[r2], &env->regs[r2 + 1], + &env->regs[r3], S390_FEAT_TYPE_KMCTR, fc, mod); + break; default: tcg_s390_program_interrupt(env, PGM_SPECIFICATION, ra); } -- 2.55.0