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qemu-patch-raspberry4
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target/ppc: 74xx: Set SRRs directly in exception code 

The 74xx does not have alternate/hypervisor Save and Restore
Registers, so we can set SRR0 and SRR1 directly.

Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Message-Id: <20220127201116.1154733-9-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
staging
Fabiano Rosas 2022-01-28 13:15:07 +01:00 committed by Cédric Le Goater
parent 91a51fecef
commit f82db77761
1 changed files with 2 additions and 11 deletions
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13
target/ppc/excp_helper.c
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@ -556,7 +556,6 @@ static void powerpc_excp_74xx(PowerPCCPU *cpu, int excp)
CPUState *cs = CPU(cpu);
CPUPPCState *env = &cpu->env;
target_ulong msr, new_msr, vector;
int srr0, srr1;
if (excp <= POWERPC_EXCP_NONE || excp >= POWERPC_EXCP_NB) {
cpu_abort(cs, "Invalid PowerPC exception %d. Aborting\n", excp);
@ -575,10 +574,6 @@ static void powerpc_excp_74xx(PowerPCCPU *cpu, int excp)
*/
new_msr = env->msr & ((target_ulong)1 << MSR_ME);
/* target registers */
srr0 = SPR_SRR0;
srr1 = SPR_SRR1;
/*
* Hypervisor emulation assistance interrupt only exists on server
* arch 2.05 server or later.
@ -731,10 +726,6 @@ static void powerpc_excp_74xx(PowerPCCPU *cpu, int excp)
cpu_abort(cs, "Trying to deliver HV exception (MSR) %d with "
"no HV support\n", excp);
}
if (srr0 == SPR_HSRR0) {
cpu_abort(cs, "Trying to deliver HV exception (HSRR) %d with "
"no HV support\n", excp);
}
}
/*
@ -746,10 +737,10 @@ static void powerpc_excp_74xx(PowerPCCPU *cpu, int excp)
}
/* Save PC */
env->spr[srr0] = env->nip;
env->spr[SPR_SRR0] = env->nip;
/* Save MSR */
env->spr[srr1] = msr;
env->spr[SPR_SRR1] = msr;
powerpc_set_excp_state(cpu, vector, new_msr);
}