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s390/kvm: do not reset riccb on initial cpu reset 

The riccb is kept unchanged during initial cpu reset. Move the data
structure to the other registers that are unchanged.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
This commit is contained in:
Christian Borntraeger 2017-05-12 13:47:30 +02:00 committed by Cornelia Huck
parent 5eb74557cd
commit cb4f4bc353
2 changed files with 8 additions and 5 deletions
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7
target/s390x/cpu.c
View File

@ -92,9 +92,10 @@ static void s390_cpu_initial_reset(CPUState *s)
int i;
s390_cpu_reset(s);
/* initial reset does not touch regs,fregs and aregs */
memset(&env->fpc, 0, offsetof(CPUS390XState, end_reset_fields) -
offsetof(CPUS390XState, fpc));
/* initial reset does not clear everything! */
memset(&env->start_initial_reset_fields, 0,
offsetof(CPUS390XState, end_reset_fields) -
offsetof(CPUS390XState, start_initial_reset_fields));
/* architectured initial values for CR 0 and 14 */
env->cregs[0] = CR0_RESET;

6
target/s390x/cpu.h
View File

@ -88,6 +88,10 @@ typedef struct CPUS390XState {
*/
CPU_DoubleU vregs[32][2]; /* vector registers */
uint32_t aregs[16]; /* access registers */
uint8_t riccb[64]; /* runtime instrumentation control */
/* Fields up to this point are not cleared by initial CPU reset */
struct {} start_initial_reset_fields;
uint32_t fpc; /* floating-point control register */
uint32_t cc_op;
@ -137,8 +141,6 @@ typedef struct CPUS390XState {
uint64_t gbea;
uint64_t pp;
uint8_t riccb[64];
/* Fields up to this point are cleared by a CPU reset */
struct {} end_reset_fields;