The DXC is to be stored in the low core, and only in the FPC in case AFP is enabled in CR0.
Signed-off-by: David Hildenbrand <da...@redhat.com> --- target/s390x/cpu.h | 1 + target/s390x/excp_helper.c | 28 ++++++++++++++++++++++++++++ target/s390x/fpu_helper.c | 13 +++---------- target/s390x/helper.h | 1 + target/s390x/tcg_s390x.h | 2 ++ target/s390x/translate.c | 19 +++++++++---------- 6 files changed, 44 insertions(+), 20 deletions(-) diff --git a/target/s390x/cpu.h b/target/s390x/cpu.h index 6f8861e554..5e50c3a303 100644 --- a/target/s390x/cpu.h +++ b/target/s390x/cpu.h @@ -322,6 +322,7 @@ extern const struct VMStateDescription vmstate_s390_cpu; #define CR0_LOWPROT 0x0000000010000000ULL #define CR0_SECONDARY 0x0000000004000000ULL #define CR0_EDAT 0x0000000000800000ULL +#define CR0_AFP 0x0000000000040000ULL #define CR0_EMERGENCY_SIGNAL_SC 0x0000000000004000ULL #define CR0_EXTERNAL_CALL_SC 0x0000000000002000ULL #define CR0_CKC_SC 0x0000000000000800ULL diff --git a/target/s390x/excp_helper.c b/target/s390x/excp_helper.c index f0ce60cff2..f5cab94ec5 100644 --- a/target/s390x/excp_helper.c +++ b/target/s390x/excp_helper.c @@ -21,11 +21,13 @@ #include "qemu/osdep.h" #include "cpu.h" #include "internal.h" +#include "exec/helper-proto.h" #include "qemu/timer.h" #include "exec/exec-all.h" #include "exec/cpu_ldst.h" #include "hw/s390x/ioinst.h" #include "exec/address-spaces.h" +#include "tcg_s390x.h" #ifndef CONFIG_USER_ONLY #include "sysemu/sysemu.h" #include "hw/s390x/s390_flic.h" @@ -48,6 +50,32 @@ do { } while (0) #endif +void QEMU_NORETURN tcg_s390_data_exception(CPUS390XState *env, uint32_t dxc, + uintptr_t ra) +{ + CPUState *cs = CPU(s390_env_get_cpu(env)); + + g_assert(!(dxc & ~0xff)); +#if !defined(CONFIG_USER_ONLY) + /* Store the DXC into the lowcore */ + stw_phys(cs->as, env->psa + offsetof(LowCore, data_exc_code), dxc); +#endif + + /* Store the DXC into the FPC if AFP is enabled */ + if (env->cregs[0] & CR0_AFP) { + env->fpc = (env->fpc & ~0xff00) | (dxc << 8); + } + s390_program_interrupt(env, PGM_DATA, ILEN_AUTO, ra); + + /* the following is not necessary, but allows us to use noreturn */ + cpu_loop_exit_restore(cs, ra); +} + +void HELPER(data_exception)(CPUS390XState *env, uint32_t dxc) +{ + tcg_s390_data_exception(env, dxc, GETPC()); +} + #if defined(CONFIG_USER_ONLY) void s390_cpu_do_interrupt(CPUState *cs) diff --git a/target/s390x/fpu_helper.c b/target/s390x/fpu_helper.c index 5c5b451b3b..1b662d2520 100644 --- a/target/s390x/fpu_helper.c +++ b/target/s390x/fpu_helper.c @@ -21,6 +21,7 @@ #include "qemu/osdep.h" #include "cpu.h" #include "internal.h" +#include "tcg_s390x.h" #include "exec/exec-all.h" #include "exec/cpu_ldst.h" #include "exec/helper-proto.h" @@ -40,14 +41,6 @@ ? (mask / (from / to)) & to \ : (mask & from) * (to / from)) -static void ieee_exception(CPUS390XState *env, uint32_t dxc, uintptr_t retaddr) -{ - /* Install the DXC code. */ - env->fpc = (env->fpc & ~0xff00) | (dxc << 8); - /* Trap. */ - s390_program_interrupt(env, PGM_DATA, ILEN_AUTO, retaddr); -} - /* Should be called after any operation that may raise IEEE exceptions. */ static void handle_exceptions(CPUS390XState *env, uintptr_t retaddr) { @@ -75,7 +68,7 @@ static void handle_exceptions(CPUS390XState *env, uintptr_t retaddr) /* Send signals for enabled exceptions. */ s390_exc &= env->fpc >> 24; if (s390_exc) { - ieee_exception(env, s390_exc, retaddr); + tcg_s390_data_exception(env, s390_exc, retaddr); } } @@ -773,6 +766,6 @@ void HELPER(sfas)(CPUS390XState *env, uint64_t val) is also 1, a simulated-iee-exception trap occurs. */ s390_exc = (signalling >> 16) & (source >> 24); if (s390_exc) { - ieee_exception(env, s390_exc | 3, GETPC()); + tcg_s390_data_exception(env, s390_exc | 3, GETPC()); } } diff --git a/target/s390x/helper.h b/target/s390x/helper.h index 97c60ca7bc..018e9dd414 100644 --- a/target/s390x/helper.h +++ b/target/s390x/helper.h @@ -1,4 +1,5 @@ DEF_HELPER_2(exception, noreturn, env, i32) +DEF_HELPER_2(data_exception, noreturn, env, i32) DEF_HELPER_FLAGS_4(nc, TCG_CALL_NO_WG, i32, env, i32, i64, i64) DEF_HELPER_FLAGS_4(oc, TCG_CALL_NO_WG, i32, env, i32, i64, i64) DEF_HELPER_FLAGS_4(xc, TCG_CALL_NO_WG, i32, env, i32, i64, i64) diff --git a/target/s390x/tcg_s390x.h b/target/s390x/tcg_s390x.h index 4e308aa0ce..f2c88d7402 100644 --- a/target/s390x/tcg_s390x.h +++ b/target/s390x/tcg_s390x.h @@ -14,5 +14,7 @@ #define TCG_S390X_H void tcg_s390_tod_updated(CPUState *cs, run_on_cpu_data opaque); +void QEMU_NORETURN tcg_s390_data_exception(CPUS390XState *env, uint32_t dxc, + uintptr_t ra); #endif /* TCG_S390X_H */ diff --git a/target/s390x/translate.c b/target/s390x/translate.c index 57c03cbf58..fa8468f0e1 100644 --- a/target/s390x/translate.c +++ b/target/s390x/translate.c @@ -307,18 +307,17 @@ static inline void gen_illegal_opcode(DisasContext *s) gen_program_exception(s, PGM_OPERATION); } -static inline void gen_trap(DisasContext *s) +static inline void gen_data_exception(uint8_t dxc) { - TCGv_i32 t; - - /* Set DXC to 0xff. */ - t = tcg_temp_new_i32(); - tcg_gen_ld_i32(t, cpu_env, offsetof(CPUS390XState, fpc)); - tcg_gen_ori_i32(t, t, 0xff00); - tcg_gen_st_i32(t, cpu_env, offsetof(CPUS390XState, fpc)); - tcg_temp_free_i32(t); + TCGv_i32 tmp = tcg_const_i32(dxc); + gen_helper_data_exception(cpu_env, tmp); + tcg_temp_free_i32(tmp); +} - gen_program_exception(s, PGM_DATA); +static inline void gen_trap(DisasContext *s) +{ + /* Set DXC to 0xff */ + gen_data_exception(0xff); } #ifndef CONFIG_USER_ONLY -- 2.17.1