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target/ppc: fix ISI fault cause for Radix MMU 

Fix Instruction Storage Interrupt (ISI) fault cause for Radix MMU,
when caused by missing PAGE_EXEC permission, to be
SRR1_NOEXEC_GUARD instead of DSISR_PROTFAULT.
This matches POWER9 hardware behavior.

Fixes: d5fee0bbe6 ("target/ppc: Implement ISA V3.00 radix page fault handler")
Signed-off-by: Leandro Lupori <leandro.lupori@eldorado.org.br>
Message-Id: <20220309192756.145283-1-leandro.lupori@eldorado.org.br>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
This commit is contained in:
Leandro Lupori 2022-03-14 15:57:17 +01:00 committed by Cédric Le Goater
parent b719411673
commit c6242335b3
1 changed files with 2 additions and 1 deletions
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3
target/ppc/mmu-radix64.c
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@ -204,7 +204,8 @@ static bool ppc_radix64_check_prot(PowerPCCPU *cpu, MMUAccessType access_type,
/* Check if requested access type is allowed */
need_prot = prot_for_access_type(access_type);
if (need_prot & ~*prot) { /* Page Protected for that Access */
*fault_cause |= DSISR_PROTFAULT;
*fault_cause |= access_type == MMU_INST_FETCH ? SRR1_NOEXEC_GUARD :
DSISR_PROTFAULT;
return true;
}