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Fri, 10 Jul 2026 15:29:09 +0000 (GMT) Received: from funtu2.ibm.com (unknown [9.111.196.135]) by smtpav07.fra02v.mail.ibm.com (Postfix) with ESMTP; Fri, 10 Jul 2026 15:29:09 +0000 (GMT) From: Harald Freudenberger To: richard.henderson@linaro.org, iii@linux.ibm.com, david@kernel.org, thuth@redhat.com, berrange@redhat.com Cc: qemu-s390x@nongnu.org, qemu-devel@nongnu.org, linux-s390@vger.kernel.org, dengler@linux.ibm.com, borntraeger@linux.ibm.com, fcallies@linux.ibm.com, cohuck@redhat.com Subject: [PATCH v12 10/17] target/s390x: Base support for cpacf protected keys and pckmo Date: Fri, 10 Jul 2026 17:28:56 +0200 Message-ID: <20260710152906.80207-11-freude@linux.ibm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260710152906.80207-1-freude@linux.ibm.com> References: <20260710152906.80207-1-freude@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-s390@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Authority-Analysis: v=2.4 cv=VebH+lp9 c=1 sm=1 tr=0 ts=6a510fca cx=c_pps a=aDMHemPKRhS1OARIsFnwRA==:117 a=aDMHemPKRhS1OARIsFnwRA==:17 a=RAioF0-LDSMA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=iQ6ETzBq9ecOQQE5vZCe:22 a=VnNF1IyMAAAA:8 a=c7LoGp8Tn7I-ceKYaY8A:9 X-Proofpoint-GUID: gn67LIa9bP0xhWCoscYAil1twQ1Ktvcj X-Proofpoint-ORIG-GUID: gn67LIa9bP0xhWCoscYAil1twQ1Ktvcj X-Proofpoint-Spam-Info: AW1haW4tMjYwNzEwMDE1MyBTYWx0ZWRfX6rb7w/vnVvEY XXMRDrp0nkU79qKAxXgW4Svod6Ooo6SFRKD1AJnQQHRcaO2+Lq0R8eEdEZLhIXrc0cWZ4MYewqF 1g87X107MeV5s6ie5mq7fWjwlagwTdM= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzEwMDE1MyBTYWx0ZWRfX6YcU24N+CJzw Q8JXIlULgKeeIF4vd9WVsiKcfsBR1I1oJxOKqH+8xnp50xpPMMj/KGb73YXVzR0pXjwsVb+dZi6 GnzaToByEIIxRkkzE1w7pIwraJ5Ir7JKn+t0qql14SPkRnm3OKL+8YSPTI2NCpKUvz00knWuc6E 7vShrEMxQqNYTv85oY0qqgVyvVNCE4EMlo2GBWYZWjGLpT7w6FM9kOGlifChue7w2mxarPMpTNV QhjtaZlAFJBQtoiK1H19MJDphOCeU+jWbFetM1F6VOx3hZMUcsHCJz4Oqs7sLjJcdZuxwWudgo/ aYtElqkikoBmIJUMOZHqsTRCpJnP8JtAfQi+eVylXlMnffl5D4L6qj++3Ibbis3hMkE0/rILw4b lNPyVz/uTzPES2x8hBdxsEq6yYMyme40cTdNLpchuYMJbUYSYIQioxrWC+AEcy+CDQkm/eBttSf wdHcRff2l0Gsbb3QDyg== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-07-10_04,2026-07-10_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 suspectscore=0 clxscore=1015 malwarescore=0 impostorscore=0 phishscore=0 lowpriorityscore=0 adultscore=0 spamscore=0 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607100153 Add base support for cpacf protected key handling. Add support for the pckmo subfunctions PCKMO-Encrypt-AES-128-Key, PCKMO-Encrypt-AES-192-Key and PCKMO-Encrypt-AES-256-Key which deal with protected keys. These pckmo subfunctions derive a protected key from an AES clear key by encrypting it with an internal AES wrapping key. More details about protected keys can be found in the "z/Architecture Prinziples of Operation" document. The qemu version provided here is only a fake intended to make protected key available for developing and testing purpose: * The protected key is 'derived' from the clear key by xoring the fixed pattern 0xAAAA... onto the key value. * The AES Wrapping Key Verification Pattern is a fixed value of 32 bytes 0xFACEFACE... Add preprocessor defines for the xor pattern and wkvp used to construct ('encrypt') a protected key from a clear key value with this implementation. Also add some static functions to 'encrypt' from clear key to protected key and 'decrypt' back to cpacf_aes.c. The preprocessor defines shall be used later in testcases to construct and decode protected keys. Signed-off-by: Harald Freudenberger Tested-by: Holger Dengler --- target/s390x/gen-features.c | 3 ++ target/s390x/tcg/cpacf.h | 29 +++++++++++++++ target/s390x/tcg/cpacf_aes.c | 64 ++++++++++++++++++++++++++++++++ target/s390x/tcg/crypto_helper.c | 21 +++++++++++ target/s390x/tcg/translate.c | 9 ++++- 5 files changed, 124 insertions(+), 2 deletions(-) diff --git a/target/s390x/gen-features.c b/target/s390x/gen-features.c index 078aeddb36..c5fd578d92 100644 --- a/target/s390x/gen-features.c +++ b/target/s390x/gen-features.c @@ -935,6 +935,9 @@ static uint16_t qemu_MAX[] = { S390_FEAT_KMCTR_AES_256, S390_FEAT_PCC_XTS_AES_128, S390_FEAT_PCC_XTS_AES_256, + S390_FEAT_PCKMO_AES_128, + S390_FEAT_PCKMO_AES_192, + S390_FEAT_PCKMO_AES_256, }; /****** END FEATURE DEFS ******/ diff --git a/target/s390x/tcg/cpacf.h b/target/s390x/tcg/cpacf.h index 61ce71476b..1d7d9baf0c 100644 --- a/target/s390x/tcg/cpacf.h +++ b/target/s390x/tcg/cpacf.h @@ -254,4 +254,33 @@ int cpacf_aes_xts(CPUS390XState *env, const int mmu_idx, uintptr_t ra, uint64_t *src_ptr_reg, uint64_t *src_len_reg, uint32_t type, uint8_t fc, uint8_t mod); +/* + * Support for protected key cpacf functions. Note that this is + * a fake implementation intended for debugging and development. + * Do not use for production load ! + */ + +/* + * Hard coded pattern xored with the AES clear key + * to 'produce' the protected key. + */ +#define PROTKEY_XOR_PATTERN { \ + 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, \ + 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, \ + 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, \ + 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA } + +/* + * Hard coded wkvp ("Wrapping Key Verification Pattern") + */ +#define PROTKEY_WKVP { \ + 0x0F, 0x0A, 0x0C, 0x0E, 0x0F, 0x0A, 0x0C, 0x0E, \ + 0x0F, 0x0A, 0x0C, 0x0E, 0x0F, 0x0A, 0x0C, 0x0E, \ + 0x0F, 0x0A, 0x0C, 0x0E, 0x0F, 0x0A, 0x0C, 0x0E, \ + 0x0F, 0x0A, 0x0C, 0x0E, 0x0F, 0x0A, 0x0C, 0x0E } + +/* from cpacf_aes.c */ +int cpacf_aes_pckmo(CPUS390XState *env, const int mmu_idx, uintptr_t ra, + uint64_t param_addr, uint8_t fc); + #endif /* S390X_CPACF_H */ diff --git a/target/s390x/tcg/cpacf_aes.c b/target/s390x/tcg/cpacf_aes.c index 13d5cdff42..bc92884ff9 100644 --- a/target/s390x/tcg/cpacf_aes.c +++ b/target/s390x/tcg/cpacf_aes.c @@ -418,3 +418,67 @@ int cpacf_aes_xts(CPUS390XState *env, const int mmu_idx, uintptr_t ra, return !len ? 0 : 3; } + +/* + * Support for protected key cpacf functions. Note that this is + * a fake implementation intended for debugging and development. + * Do not use for production load ! + */ + +/* + * Hard coded pattern xored with the AES clear key + * to 'produce' the protected key. + */ +static const uint8_t protkey_xor_pattern[32] = PROTKEY_XOR_PATTERN; + +/* + * Hard coded wkvp ("Wrapping Key Verification Pattern") + */ +static const uint8_t protkey_wkvp[32] = PROTKEY_WKVP; + +/* + * 'encrypt' the clear key value into a protected key + * by xor-ing the protkey_xor_pattern onto it. + */ +static void encrypt_clrkey(uint8_t *key, int keysize) +{ + for (int i = 0; i < keysize; i++) { + key[i] ^= protkey_xor_pattern[i]; + } +} + +int cpacf_aes_pckmo(CPUS390XState *env, const int mmu_idx, uintptr_t ra, + uint64_t param_addr, uint8_t fc) +{ + uint8_t key[32]; + int keysize; + + switch (fc) { + case CPACF_PCKMO_ENC_AES_128_KEY: + keysize = 16; + break; + case CPACF_PCKMO_ENC_AES_192_KEY: + keysize = 24; + break; + case CPACF_PCKMO_ENC_AES_256_KEY: + keysize = 32; + break; + default: + g_assert_not_reached(); + } + + /* fetch key from param block */ + copy_from_guest_wrap(env, mmu_idx, ra, param_addr, key, keysize); + + /* 'derive' the protected key from the clear key */ + encrypt_clrkey(key, keysize); + + /* store the protected key into param block */ + copy_to_guest_wrap(env, mmu_idx, ra, param_addr, key, keysize); + /* followed by the fake wkvp */ + copy_to_guest_wrap(env, mmu_idx, ra, + param_addr + keysize, + protkey_wkvp, sizeof(protkey_wkvp)); + + return 0; +} diff --git a/target/s390x/tcg/crypto_helper.c b/target/s390x/tcg/crypto_helper.c index 564f7fa243..08151e916f 100644 --- a/target/s390x/tcg/crypto_helper.c +++ b/target/s390x/tcg/crypto_helper.c @@ -192,6 +192,24 @@ static int cpacf_pcc(CPUS390XState *env, const int mmu_idx, uintptr_t ra, return rc; } +static int cpacf_pckmo(CPUS390XState *env, const int mmu_idx, uintptr_t ra, + uint8_t fc) +{ + int rc = 0; + + switch (fc) { + case CPACF_PCKMO_ENC_AES_128_KEY: + case CPACF_PCKMO_ENC_AES_192_KEY: + case CPACF_PCKMO_ENC_AES_256_KEY: + rc = cpacf_aes_pckmo(env, mmu_idx, ra, env->regs[1], fc); + break; + default: + tcg_s390_program_interrupt(env, PGM_SPECIFICATION, ra); + } + + return rc; +} + uint32_t HELPER(msa)(CPUS390XState *env, uint32_t r1, uint32_t r2, uint32_t r3, uint32_t type) { @@ -251,6 +269,9 @@ uint32_t HELPER(msa)(CPUS390XState *env, uint32_t r1, uint32_t r2, uint32_t r3, case S390_FEAT_TYPE_PCC: rc = cpacf_pcc(env, mmu_idx, ra, fc); break; + case S390_FEAT_TYPE_PCKMO: + rc = cpacf_pckmo(env, mmu_idx, ra, fc); + break; case S390_FEAT_TYPE_PPNO: rc = cpacf_ppno(env, mmu_idx, ra, r1, r2, r3, fc); break; diff --git a/target/s390x/tcg/translate.c b/target/s390x/tcg/translate.c index cef1b55149..d7a99e6c1e 100644 --- a/target/s390x/tcg/translate.c +++ b/target/s390x/tcg/translate.c @@ -2558,6 +2558,7 @@ static DisasJumpType op_msa(DisasContext *s, DisasOps *o) int r2 = have_field(s, r2) ? get_field(s, r2) : 0; int r3 = have_field(s, r3) ? get_field(s, r3) : 0; TCGv_i32 t_r1, t_r2, t_r3, type; + bool update_cc = true; switch (s->insn->data) { case S390_FEAT_TYPE_KMA: @@ -2589,8 +2590,10 @@ static DisasJumpType op_msa(DisasContext *s, DisasOps *o) gen_program_exception(s, PGM_SPECIFICATION); return DISAS_NORETURN; } - /* FALL THROUGH */ + break; case S390_FEAT_TYPE_PCKMO: + update_cc = false; + /* FALL THROUGH */ case S390_FEAT_TYPE_PCC: case S390_FEAT_TYPE_KDSA: break; @@ -2603,7 +2606,9 @@ static DisasJumpType op_msa(DisasContext *s, DisasOps *o) t_r3 = tcg_constant_i32(r3); type = tcg_constant_i32(s->insn->data); gen_helper_msa(cc_op, tcg_env, t_r1, t_r2, t_r3, type); - set_cc_static(s); + if (update_cc) { + set_cc_static(s); + } return DISAS_NEXT; } -- 2.43.0