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Sat, 14 Dec 2019 09:45:54 +0000 (UTC) From: Cornelia Huck To: Peter Maydell Subject: [PULL v2 07/16] s390x: Beautify diag308 handling Date: Sat, 14 Dec 2019 10:45:17 +0100 Message-Id: <20191214094526.8698-8-cohuck@redhat.com> In-Reply-To: <20191214094526.8698-1-cohuck@redhat.com> References: <20191214094526.8698-1-cohuck@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-MC-Unique: NJ36G41AM6OqRjOExXUqbg-1 X-Mimecast-Spam-Score: 0 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 207.211.31.120 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Thomas Huth , Janosch Frank , David Hildenbrand , Cornelia Huck , qemu-devel@nongnu.org, qemu-s390x@nongnu.org Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" From: Janosch Frank Let's improve readability by: * Using constants for the subcodes * Moving parameter checking into a function * Removing subcode > 6 check as the default case catches that Signed-off-by: Janosch Frank Reviewed-by: Cornelia Huck Reviewed-by: Thomas Huth Reviewed-by: David Hildenbrand Message-Id: <20191127175046.4911-6-frankja@linux.ibm.com> Signed-off-by: Cornelia Huck --- target/s390x/diag.c | 54 +++++++++++++++++++++++++++------------------ 1 file changed, 32 insertions(+), 22 deletions(-) diff --git a/target/s390x/diag.c b/target/s390x/diag.c index 53c2f81f2a1a..b5aec06d6bef 100644 --- a/target/s390x/diag.c +++ b/target/s390x/diag.c @@ -53,6 +53,29 @@ int handle_diag_288(CPUS390XState *env, uint64_t r1, uint64_t r3) #define DIAG_308_RC_NO_CONF 0x0102 #define DIAG_308_RC_INVALID 0x0402 +#define DIAG308_RESET_MOD_CLR 0 +#define DIAG308_RESET_LOAD_NORM 1 +#define DIAG308_LOAD_CLEAR 3 +#define DIAG308_LOAD_NORMAL_DUMP 4 +#define DIAG308_SET 5 +#define DIAG308_STORE 6 + +static int diag308_parm_check(CPUS390XState *env, uint64_t r1, uint64_t addr, + uintptr_t ra, bool write) +{ + if ((r1 & 1) || (addr & ~TARGET_PAGE_MASK)) { + s390_program_interrupt(env, PGM_SPECIFICATION, ra); + return -1; + } + if (!address_space_access_valid(&address_space_memory, addr, + sizeof(IplParameterBlock), write, + MEMTXATTRS_UNSPECIFIED)) { + s390_program_interrupt(env, PGM_ADDRESSING, ra); + return -1; + } + return 0; +} + void handle_diag_308(CPUS390XState *env, uint64_t r1, uint64_t r3, uintptr_t ra) { CPUState *cs = env_cpu(env); @@ -65,30 +88,24 @@ void handle_diag_308(CPUS390XState *env, uint64_t r1, uint64_t r3, uintptr_t ra) return; } - if ((subcode & ~0x0ffffULL) || (subcode > 6)) { + if (subcode & ~0x0ffffULL) { s390_program_interrupt(env, PGM_SPECIFICATION, ra); return; } switch (subcode) { - case 0: + case DIAG308_RESET_MOD_CLR: s390_ipl_reset_request(cs, S390_RESET_MODIFIED_CLEAR); break; - case 1: + case DIAG308_RESET_LOAD_NORM: s390_ipl_reset_request(cs, S390_RESET_LOAD_NORMAL); break; - case 3: + case DIAG308_LOAD_CLEAR: + /* Well we still lack the clearing bit... */ s390_ipl_reset_request(cs, S390_RESET_REIPL); break; - case 5: - if ((r1 & 1) || (addr & 0x0fffULL)) { - s390_program_interrupt(env, PGM_SPECIFICATION, ra); - return; - } - if (!address_space_access_valid(&address_space_memory, addr, - sizeof(IplParameterBlock), false, - MEMTXATTRS_UNSPECIFIED)) { - s390_program_interrupt(env, PGM_ADDRESSING, ra); + case DIAG308_SET: + if (diag308_parm_check(env, r1, addr, ra, false)) { return; } iplb = g_new0(IplParameterBlock, 1); @@ -110,15 +127,8 @@ void handle_diag_308(CPUS390XState *env, uint64_t r1, uint64_t r3, uintptr_t ra) out: g_free(iplb); return; - case 6: - if ((r1 & 1) || (addr & 0x0fffULL)) { - s390_program_interrupt(env, PGM_SPECIFICATION, ra); - return; - } - if (!address_space_access_valid(&address_space_memory, addr, - sizeof(IplParameterBlock), true, - MEMTXATTRS_UNSPECIFIED)) { - s390_program_interrupt(env, PGM_ADDRESSING, ra); + case DIAG308_STORE: + if (diag308_parm_check(env, r1, addr, ra, true)) { return; } iplb = s390_ipl_get_iplb();