| Message ID | 20200320051809.24332-13-jniethe5@gmail.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | Initial Prefixed Instruction support | expand |
| Context | Check | Description |
|---|---|---|
| snowpatch_ozlabs/apply_patch | warning | Failed to apply on branch linus/master (6c90b86a745a446717fdf408c4a8a4631a5e8ee3) |
| snowpatch_ozlabs/apply_patch | warning | Failed to apply on branch powerpc/merge (8a445cbcb9f5090cb07ec6cbb89a8a1fc99a0ff7) |
| snowpatch_ozlabs/apply_patch | warning | Failed to apply on branch powerpc/next (59ed2adf393109c56d383e568f2e57bb5ad6d901) |
| snowpatch_ozlabs/apply_patch | warning | Failed to apply on branch powerpc/fixes (af3d0a68698c7e5df8b72267086b23422a3954bb) |
| snowpatch_ozlabs/apply_patch | warning | Failed to apply on branch linux-next (aff7e57f8266549245eb4a272ce149b752dfce77) |
| snowpatch_ozlabs/apply_patch | fail | Failed to apply to any branch |
Jordan Niethe's on March 20, 2020 3:18 pm: > Add the BOUNDARY SRR1 bit definition for when the cause of an alignment > exception is a prefixed instruction that crosses a 64-byte boundary. > Add the PREFIXED SRR1 bit definition for exceptions caused by prefixed > instructions. > > Bit 35 of SRR1 is called SRR1_ISI_N_OR_G. This name comes from it being > used to indicate that an ISI was due to the access being no-exec or > guarded. A future ISA version adds another purpose. It is also set if > there is an access in a cache-inhibited location for prefixed > instruction. Rename from SRR1_ISI_N_OR_G to SRR1_ISI_N_G_OR_CIP. Seems okay. > > Signed-off-by: Jordan Niethe <jniethe5@gmail.com> > --- > v2: Combined all the commits concerning SRR1 bits. > --- > arch/powerpc/include/asm/reg.h | 4 +++- > arch/powerpc/kvm/book3s_hv_nested.c | 2 +- > arch/powerpc/kvm/book3s_hv_rm_mmu.c | 2 +- > 3 files changed, 5 insertions(+), 3 deletions(-) > > diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h > index c7758c2ccc5f..173f33df4fab 100644 > --- a/arch/powerpc/include/asm/reg.h > +++ b/arch/powerpc/include/asm/reg.h > @@ -762,7 +762,7 @@ > #endif > > #define SRR1_ISI_NOPT 0x40000000 /* ISI: Not found in hash */ > -#define SRR1_ISI_N_OR_G 0x10000000 /* ISI: Access is no-exec or G */ > +#define SRR1_ISI_N_G_OR_CIP 0x10000000 /* ISI: Access is no-exec or G or CI for a prefixed instruction */ > #define SRR1_ISI_PROT 0x08000000 /* ISI: Other protection fault */ > #define SRR1_WAKEMASK 0x00380000 /* reason for wakeup */ > #define SRR1_WAKEMASK_P8 0x003c0000 /* reason for wakeup on POWER8 and 9 */ > @@ -789,6 +789,8 @@ > #define SRR1_PROGADDR 0x00010000 /* SRR0 contains subsequent addr */ > > #define SRR1_MCE_MCP 0x00080000 /* Machine check signal caused interrupt */ > +#define SRR1_BOUNDARY 0x10000000 /* Prefixed instruction crosses 64-byte boundary */ > +#define SRR1_PREFIXED 0x20000000 /* Exception caused by prefixed instruction */ > > #define SPRN_HSRR0 0x13A /* Save/Restore Register 0 */ > #define SPRN_HSRR1 0x13B /* Save/Restore Register 1 */ > diff --git a/arch/powerpc/kvm/book3s_hv_nested.c b/arch/powerpc/kvm/book3s_hv_nested.c > index dc97e5be76f6..6ab685227574 100644 > --- a/arch/powerpc/kvm/book3s_hv_nested.c > +++ b/arch/powerpc/kvm/book3s_hv_nested.c > @@ -1169,7 +1169,7 @@ static int kvmhv_translate_addr_nested(struct kvm_vcpu *vcpu, > } else if (vcpu->arch.trap == BOOK3S_INTERRUPT_H_INST_STORAGE) { > /* Can we execute? */ > if (!gpte_p->may_execute) { > - flags |= SRR1_ISI_N_OR_G; > + flags |= SRR1_ISI_N_G_OR_CIP; > goto forward_to_l1; > } > } else { > diff --git a/arch/powerpc/kvm/book3s_hv_rm_mmu.c b/arch/powerpc/kvm/book3s_hv_rm_mmu.c > index 220305454c23..b53a9f1c1a46 100644 > --- a/arch/powerpc/kvm/book3s_hv_rm_mmu.c > +++ b/arch/powerpc/kvm/book3s_hv_rm_mmu.c > @@ -1260,7 +1260,7 @@ long kvmppc_hpte_hv_fault(struct kvm_vcpu *vcpu, unsigned long addr, > status &= ~DSISR_NOHPTE; /* DSISR_NOHPTE == SRR1_ISI_NOPT */ > if (!data) { > if (gr & (HPTE_R_N | HPTE_R_G)) > - return status | SRR1_ISI_N_OR_G; > + return status | SRR1_ISI_N_G_OR_CIP; > if (!hpte_read_permission(pp, slb_v & key)) > return status | SRR1_ISI_PROT; > } else if (status & DSISR_ISSTORE) { > -- > 2.17.1 > >
diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h index c7758c2ccc5f..173f33df4fab 100644 --- a/arch/powerpc/include/asm/reg.h +++ b/arch/powerpc/include/asm/reg.h @@ -762,7 +762,7 @@ #endif #define SRR1_ISI_NOPT 0x40000000 /* ISI: Not found in hash */ -#define SRR1_ISI_N_OR_G 0x10000000 /* ISI: Access is no-exec or G */ +#define SRR1_ISI_N_G_OR_CIP 0x10000000 /* ISI: Access is no-exec or G or CI for a prefixed instruction */ #define SRR1_ISI_PROT 0x08000000 /* ISI: Other protection fault */ #define SRR1_WAKEMASK 0x00380000 /* reason for wakeup */ #define SRR1_WAKEMASK_P8 0x003c0000 /* reason for wakeup on POWER8 and 9 */ @@ -789,6 +789,8 @@ #define SRR1_PROGADDR 0x00010000 /* SRR0 contains subsequent addr */ #define SRR1_MCE_MCP 0x00080000 /* Machine check signal caused interrupt */ +#define SRR1_BOUNDARY 0x10000000 /* Prefixed instruction crosses 64-byte boundary */ +#define SRR1_PREFIXED 0x20000000 /* Exception caused by prefixed instruction */ #define SPRN_HSRR0 0x13A /* Save/Restore Register 0 */ #define SPRN_HSRR1 0x13B /* Save/Restore Register 1 */ diff --git a/arch/powerpc/kvm/book3s_hv_nested.c b/arch/powerpc/kvm/book3s_hv_nested.c index dc97e5be76f6..6ab685227574 100644 --- a/arch/powerpc/kvm/book3s_hv_nested.c +++ b/arch/powerpc/kvm/book3s_hv_nested.c @@ -1169,7 +1169,7 @@ static int kvmhv_translate_addr_nested(struct kvm_vcpu *vcpu, } else if (vcpu->arch.trap == BOOK3S_INTERRUPT_H_INST_STORAGE) { /* Can we execute? */ if (!gpte_p->may_execute) { - flags |= SRR1_ISI_N_OR_G; + flags |= SRR1_ISI_N_G_OR_CIP; goto forward_to_l1; } } else { diff --git a/arch/powerpc/kvm/book3s_hv_rm_mmu.c b/arch/powerpc/kvm/book3s_hv_rm_mmu.c index 220305454c23..b53a9f1c1a46 100644 --- a/arch/powerpc/kvm/book3s_hv_rm_mmu.c +++ b/arch/powerpc/kvm/book3s_hv_rm_mmu.c @@ -1260,7 +1260,7 @@ long kvmppc_hpte_hv_fault(struct kvm_vcpu *vcpu, unsigned long addr, status &= ~DSISR_NOHPTE; /* DSISR_NOHPTE == SRR1_ISI_NOPT */ if (!data) { if (gr & (HPTE_R_N | HPTE_R_G)) - return status | SRR1_ISI_N_OR_G; + return status | SRR1_ISI_N_G_OR_CIP; if (!hpte_read_permission(pp, slb_v & key)) return status | SRR1_ISI_PROT; } else if (status & DSISR_ISSTORE) {
Add the BOUNDARY SRR1 bit definition for when the cause of an alignment exception is a prefixed instruction that crosses a 64-byte boundary. Add the PREFIXED SRR1 bit definition for exceptions caused by prefixed instructions. Bit 35 of SRR1 is called SRR1_ISI_N_OR_G. This name comes from it being used to indicate that an ISI was due to the access being no-exec or guarded. A future ISA version adds another purpose. It is also set if there is an access in a cache-inhibited location for prefixed instruction. Rename from SRR1_ISI_N_OR_G to SRR1_ISI_N_G_OR_CIP. Signed-off-by: Jordan Niethe <jniethe5@gmail.com> --- v2: Combined all the commits concerning SRR1 bits. --- arch/powerpc/include/asm/reg.h | 4 +++- arch/powerpc/kvm/book3s_hv_nested.c | 2 +- arch/powerpc/kvm/book3s_hv_rm_mmu.c | 2 +- 3 files changed, 5 insertions(+), 3 deletions(-)