diff options
| author | David Hildenbrand <david@redhat.com> | 2019-02-22 11:19:48 +0100 |
|---|---|---|
| committer | David Hildenbrand <david@redhat.com> | 2019-06-07 14:53:25 +0200 |
| commit | 9be6fa99d6b1371ced6a9b57c32daec86733cd0a (patch) | |
| tree | d1922ea6cd6eadd8593e093d51daacbc50fc960e | |
| parent | e19a61eb514dbf7c9a725c7539ce3b6166cd6ac4 (diff) | |
s390x/tcg: Introduce tcg_s390_vector_exception()
Handling is similar to data exceptions, however we can always store the
VXC into the lowore and the FPC:
z14 PoP, 6-20, "Vector-Exception Code"
When a vector-processing exception causes a pro-
gram interruption, a vector-exception code (VXC) is
stored at location 147, and zeros are stored at loca-
tions 144-146. The VXC is also placed in the DXC
field of the floating-point-control (FPC) register if bit
45 of control register 0 is one. When bit 45 of control
register 0 is zero and bit 46 of control register 0 is
one, the DXC field of the FPC register and the con-
tents of storage at location 147 are unpredictable.
Signed-off-by: David Hildenbrand <david@redhat.com>
| -rw-r--r-- | target/s390x/cpu.h | 1 | ||||
| -rw-r--r-- | target/s390x/excp_helper.c | 15 | ||||
| -rw-r--r-- | target/s390x/tcg_s390x.h | 2 |
3 files changed, 18 insertions, 0 deletions
diff --git a/target/s390x/cpu.h b/target/s390x/cpu.h index 317a1377e6..4fc08a2c88 100644 --- a/target/s390x/cpu.h +++ b/target/s390x/cpu.h @@ -215,6 +215,7 @@ extern const struct VMStateDescription vmstate_s390_cpu; #define PGM_SPECIAL_OP 0x0013 #define PGM_OPERAND 0x0015 #define PGM_TRACE_TABLE 0x0016 +#define PGM_VECTOR_PROCESSING 0x001b #define PGM_SPACE_SWITCH 0x001c #define PGM_HFP_SQRT 0x001d #define PGM_PC_TRANS_SPEC 0x001f diff --git a/target/s390x/excp_helper.c b/target/s390x/excp_helper.c index 85223d00c0..f21bcf79ae 100644 --- a/target/s390x/excp_helper.c +++ b/target/s390x/excp_helper.c @@ -62,6 +62,21 @@ void QEMU_NORETURN tcg_s390_data_exception(CPUS390XState *env, uint32_t dxc, tcg_s390_program_interrupt(env, PGM_DATA, ILEN_AUTO, ra); } +void QEMU_NORETURN tcg_s390_vector_exception(CPUS390XState *env, uint32_t vxc, + uintptr_t ra) +{ + g_assert(vxc <= 0xff); +#if !defined(CONFIG_USER_ONLY) + /* Always store the VXC into the lowcore, without AFP it is undefined */ + stl_phys(CPU(s390_env_get_cpu(env))->as, + env->psa + offsetof(LowCore, data_exc_code), vxc); +#endif + + /* Always store the VXC into the FPC, without AFP it is undefined */ + env->fpc = deposit32(env->fpc, 8, 8, vxc); + tcg_s390_program_interrupt(env, PGM_VECTOR_PROCESSING, ILEN_AUTO, ra); +} + void HELPER(data_exception)(CPUS390XState *env, uint32_t dxc) { tcg_s390_data_exception(env, dxc, GETPC()); diff --git a/target/s390x/tcg_s390x.h b/target/s390x/tcg_s390x.h index ab2c4ba703..2813f9d48e 100644 --- a/target/s390x/tcg_s390x.h +++ b/target/s390x/tcg_s390x.h @@ -18,5 +18,7 @@ void QEMU_NORETURN tcg_s390_program_interrupt(CPUS390XState *env, uint32_t code, int ilen, uintptr_t ra); void QEMU_NORETURN tcg_s390_data_exception(CPUS390XState *env, uint32_t dxc, uintptr_t ra); +void QEMU_NORETURN tcg_s390_vector_exception(CPUS390XState *env, uint32_t vxc, + uintptr_t ra); #endif /* TCG_S390X_H */ |