| Message ID | c60019daaf0218b64205ba2ec4d5f8edca20776a.1714606359.git.balaton@eik.bme.hu |
|---|---|
| State | New |
| Headers | show |
| Series | Misc PPC exception and BookE MMU clean ups | expand |
On Thu May 2, 2024 at 9:43 AM AEST, BALATON Zoltan wrote: > In mmubooke_check_tlb() prot2 is calculated first but only used after > an unrelated check that can return before tha value is used. Move the > calculation after the check, closer to where it is used, to keep them > together and avoid computing it when not needed. > > Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu> Reviwed-by: Nicholas Piggin <npiggin@gmail.com> > --- > target/ppc/mmu_common.c | 11 +++++------ > 1 file changed, 5 insertions(+), 6 deletions(-) > > diff --git a/target/ppc/mmu_common.c b/target/ppc/mmu_common.c > index 751403f1c8..168ff842a5 100644 > --- a/target/ppc/mmu_common.c > +++ b/target/ppc/mmu_common.c > @@ -634,12 +634,6 @@ static int mmubooke_check_tlb(CPUPPCState *env, ppcemb_tlb_t *tlb, > return -1; > } > > - if (FIELD_EX64(env->msr, MSR, PR)) { > - prot2 = tlb->prot & 0xF; > - } else { > - prot2 = (tlb->prot >> 4) & 0xF; > - } > - > /* Check the address space */ > if ((access_type == MMU_INST_FETCH ? > FIELD_EX64(env->msr, MSR, IR) : > @@ -648,6 +642,11 @@ static int mmubooke_check_tlb(CPUPPCState *env, ppcemb_tlb_t *tlb, > return -1; > } > > + if (FIELD_EX64(env->msr, MSR, PR)) { > + prot2 = tlb->prot & 0xF; > + } else { > + prot2 = (tlb->prot >> 4) & 0xF; > + } > *prot = prot2; > if (prot2 & prot_for_access_type(access_type)) { > qemu_log_mask(CPU_LOG_MMU, "%s: good TLB!\n", __func__);
diff --git a/target/ppc/mmu_common.c b/target/ppc/mmu_common.c index 751403f1c8..168ff842a5 100644 --- a/target/ppc/mmu_common.c +++ b/target/ppc/mmu_common.c @@ -634,12 +634,6 @@ static int mmubooke_check_tlb(CPUPPCState *env, ppcemb_tlb_t *tlb, return -1; } - if (FIELD_EX64(env->msr, MSR, PR)) { - prot2 = tlb->prot & 0xF; - } else { - prot2 = (tlb->prot >> 4) & 0xF; - } - /* Check the address space */ if ((access_type == MMU_INST_FETCH ? FIELD_EX64(env->msr, MSR, IR) : @@ -648,6 +642,11 @@ static int mmubooke_check_tlb(CPUPPCState *env, ppcemb_tlb_t *tlb, return -1; } + if (FIELD_EX64(env->msr, MSR, PR)) { + prot2 = tlb->prot & 0xF; + } else { + prot2 = (tlb->prot >> 4) & 0xF; + } *prot = prot2; if (prot2 & prot_for_access_type(access_type)) { qemu_log_mask(CPU_LOG_MMU, "%s: good TLB!\n", __func__);
In mmubooke_check_tlb() prot2 is calculated first but only used after an unrelated check that can return before tha value is used. Move the calculation after the check, closer to where it is used, to keep them together and avoid computing it when not needed. Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu> --- target/ppc/mmu_common.c | 11 +++++------ 1 file changed, 5 insertions(+), 6 deletions(-)