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[Qemu-devel] [PATCH 14/15] target-s390x: PER instruction-fetch nullifica
From: |
Aurelien Jarno |
Subject: |
[Qemu-devel] [PATCH 14/15] target-s390x: PER instruction-fetch nullification event support |
Date: |
Sat, 13 Jun 2015 00:46:02 +0200 |
For the instruction-fetch nullification event, we just reuse the
existing instruction-fetch code and trigger the exception immediately
in that case.
There is no need to save the CPU state in the TCG code as it has been
saved by the previous instruction before calling the per_check_exception
helper.
Cc: Alexander Graf <address@hidden>
Cc: Richard Henderson <address@hidden>
Signed-off-by: Aurelien Jarno <address@hidden>
---
target-s390x/misc_helper.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/target-s390x/misc_helper.c b/target-s390x/misc_helper.c
index ca3aabe..241f82e 100644
--- a/target-s390x/misc_helper.c
+++ b/target-s390x/misc_helper.c
@@ -525,6 +525,18 @@ void HELPER(per_ifetch)(CPUS390XState *env, uint64_t addr)
if ((env->cregs[9] & PER_CR9_EVENT_IFETCH) && get_per_in_range(env, addr))
{
env->per_address = addr;
env->per_perc_atmid = PER_CODE_EVENT_IFETCH | get_per_atmid(env);
+
+ /* If the instruction has to be nullified, trigger the
+ exception immediately. */
+ if (env->cregs[9] & PER_CR9_EVENT_NULLIFICATION) {
+ CPUState *cs = CPU(s390_env_get_cpu(env));
+
+ env->int_pgm_code = PGM_PER;
+ env->int_pgm_ilen = get_ilen(cpu_ldub_code(env, addr));
+
+ cs->exception_index = EXCP_PGM;
+ cpu_loop_exit(cs);
+ }
}
}
#endif
--
2.1.4
- [Qemu-devel] [PATCH 02/15] target-s390x: function to adjust the length wrt page boundary, (continued)
- [Qemu-devel] [PATCH 02/15] target-s390x: function to adjust the length wrt page boundary, Aurelien Jarno, 2015/06/12
- [Qemu-devel] [PATCH 01/15] softmmu: provide tlb_vaddr_to_host function for user mode, Aurelien Jarno, 2015/06/12
- [Qemu-devel] [PATCH 06/15] target-s390x: add get_per_atmid function, Aurelien Jarno, 2015/06/12
- [Qemu-devel] [PATCH 07/15] target-s390x: add get_per_in_range function, Aurelien Jarno, 2015/06/12
- [Qemu-devel] [PATCH 11/15] translate-all: fix watchpoints if retranslation not possible, Aurelien Jarno, 2015/06/12
- [Qemu-devel] [PATCH 04/15] target-s390x: mvc_fast_memmove: access memory through softmmu, Aurelien Jarno, 2015/06/12
- [Qemu-devel] [PATCH 03/15] target-s390x: mvc_fast_memset: access memory through softmmu, Aurelien Jarno, 2015/06/12
- [Qemu-devel] [PATCH 09/15] target-s390x: PER successful-branching event support, Aurelien Jarno, 2015/06/12
- [Qemu-devel] [PATCH 10/15] target-s390x: PER instruction-fetch event support, Aurelien Jarno, 2015/06/12
- [Qemu-devel] [PATCH 08/15] target-s390x: basic PER event handling, Aurelien Jarno, 2015/06/12
- [Qemu-devel] [PATCH 14/15] target-s390x: PER instruction-fetch nullification event support,
Aurelien Jarno <=
- [Qemu-devel] [PATCH 13/15] target-s390x: PER store-using-real-address event support, Aurelien Jarno, 2015/06/12
- [Qemu-devel] [PATCH 15/15] target-s390x: PER: add Breaking-Event-Address register, Aurelien Jarno, 2015/06/12
- [Qemu-devel] [PATCH 12/15] target-s390x: PER storage-alteration event support, Aurelien Jarno, 2015/06/12
- Re: [Qemu-devel] [PATCH 00/15] target-s390x: add Program-Event Recording feature, Alexander Graf, 2015/06/16