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ppc: Rework POWER7 & POWER8 exception model

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From: Benjamin Herrenschmidt <benh@kernel.crashing.org>

This patch fixes the current AIL implementation for POWER8. The
interrupt vector address can be calculated directly from LPCR when the
exception is handled. The excp_prefix update becomes useless and we
can cleanup the H_SET_MODE hcall.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
[clg: Removed LPES0/1 handling for HV vs. !HV
      Fixed LPCR_ILE case for POWERPC_EXCP_POWER8 ]
Signed-off-by: Cédric Le Goater <clg@fr.ibm.com>
[dwg: This was written as a cleanup, but it also fixes a real bug
      where setting an alternative interrupt location would not be
      correctly migrated]
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Cédric Le Goater 2016-04-03 19:57:50 +02:00 • committed by David Gibson
parent 2e3a76ae3e
commit 5c94b2a5e5
5 changed files with 59 additions and 23 deletions
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16
hw/ppc/spapr_hcall.c
View file

@ -824,7 +824,6 @@ static target_ulong h_set_mode_resource_addr_trans_mode(PowerPCCPU *cpu,
{
CPUState *cs;
PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu);
target_ulong prefix;
if (!(pcc->insns_flags2 & PPC2_ISA207S)) {
return H_P2;
@ -836,25 +835,12 @@ static target_ulong h_set_mode_resource_addr_trans_mode(PowerPCCPU *cpu,
return H_P4;
}
switch (mflags) {
case H_SET_MODE_ADDR_TRANS_NONE:
prefix = 0;
break;
case H_SET_MODE_ADDR_TRANS_0001_8000:
prefix = 0x18000;
break;
case H_SET_MODE_ADDR_TRANS_C000_0000_0000_4000:
prefix = 0xC000000000004000ULL;
break;
default:
if (mflags == AIL_RESERVED) {
return H_UNSUPPORTED_FLAG;
}
CPU_FOREACH(cs) {
CPUPPCState *env = &POWERPC_CPU(cpu)->env;
set_spr(cs, SPR_LPCR, mflags << LPCR_AIL_SHIFT, LPCR_AIL);
env->excp_prefix = prefix;
}
return H_SUCCESS;