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target/ppc: Fix VRMA to not check virtual page class key protection

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Hash virtual real mode addressing is defined by the architecture
to not perform virtual page class key protection checks.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
This commit is contained in:
Nicholas Piggin 2024-08-06 23:13:17 +10:00
parent 87de77f6ae
commit fdd9cf281d
1 changed files with 8 additions and 1 deletions
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9
target/ppc/mmu-hash64.c
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@ -993,6 +993,7 @@ bool ppc_hash64_xlate(PowerPCCPU *cpu, vaddr eaddr, MMUAccessType access_type,
int exec_prot, pp_prot, amr_prot, prot;
int need_prot;
hwaddr raddr;
bool vrma = false;
/*
* Note on LPCR usage: 970 uses HID4, but our special variant of
@ -1022,6 +1023,7 @@ bool ppc_hash64_xlate(PowerPCCPU *cpu, vaddr eaddr, MMUAccessType access_type,
}
} else if (ppc_hash64_use_vrma(env)) {
/* Emulated VRMA mode */
vrma = true;
slb = &vrma_slbe;
if (build_vrma_slbe(cpu, slb) != 0) {
/* Invalid VRMA setup, machine check */
@ -1136,7 +1138,12 @@ bool ppc_hash64_xlate(PowerPCCPU *cpu, vaddr eaddr, MMUAccessType access_type,
exec_prot = ppc_hash64_pte_noexec_guard(cpu, pte);
pp_prot = ppc_hash64_pte_prot(mmu_idx, slb, pte);
amr_prot = ppc_hash64_amr_prot(cpu, pte);
if (vrma) {
/* VRMA does not check keys */
amr_prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
} else {
amr_prot = ppc_hash64_amr_prot(cpu, pte);
}
prot = exec_prot & pp_prot & amr_prot;
need_prot = check_prot_access_type(PAGE_RWX, access_type);