Commit Graph

5 Commits

Author SHA1 Message Date
Richard Henderson 3e20185892 target/s390x: Remove ilen parameter from tcg_s390_program_interrupt
Since we begin the operation with an unwind, we have the proper
value of ilen immediately available.

Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20191001171614.8405-3-richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
2019-10-09 12:49:01 +02:00
David Hildenbrand 9be6fa99d6 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>
2019-06-07 14:53:25 +02:00
David Hildenbrand bbf6ea3bd9 s390x/tcg: factor out and fix DATA exception injection
The DXC is to be stored in the low core, and only in the FPC in case AFP
is enabled in CR0. Stub is not required in current code, but this way
we never run into problems.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20180927130303.12236-3-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2018-10-04 10:32:39 +02:00
David Hildenbrand 52341ed61d s390x: move tcg_s390_program_interrupt() into TCG code and mark it noreturn
Move it into TCG-only code and provide a stub. Turn it into noreturn.

As Richard noted, we currently don't log the psw.addr before restoring
the state, fix that by moving (duplicating) the qemu_log_mask in the
tcg/kvm handlers.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20180927130303.12236-2-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2018-10-04 10:32:39 +02:00
David Hildenbrand 7de3b1cdc6 s390x/tcg: properly implement the TOD
Right now, each CPU has its own TOD. Especially, the TOD will differ
based on creation time of a CPU - e.g. when hotplugging a CPU the times
will differ quite a lot, resulting in stall warnings in the guest.

Let's use a single TOD by implementing our new TOD device. Prepare it
for TOD-clock epoch extension.

Most importantly, whenever we set the TOD, we have to update the CKC
timer.

Introduce "tcg_s390x.h" just like "kvm_s390x.h" for tcg specific
function declarations that should not go into cpu.h.

Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20180627134410.4901-6-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
2018-07-02 10:37:38 +02:00