POWER8 has a bit in the LPCR to enable or disable the PURR and SPURR registers to count when in the guest. Set this bit. POWER8 has a field in the LPCR called AIL (Alternate Interrupt Location) which is used to enable relocation-on interrupts. Allow userspace to set this field. Signed-off-by: Paul Mackerras <paulus@xxxxxxxxx> --- arch/powerpc/include/asm/reg.h | 2 ++ arch/powerpc/kvm/book3s_hv.c | 6 ++++++ 2 files changed, 8 insertions(+) diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h index 8c6b278..e86b008 100644 --- a/arch/powerpc/include/asm/reg.h +++ b/arch/powerpc/include/asm/reg.h @@ -300,8 +300,10 @@ #define LPCR_RMLS 0x1C000000 /* impl dependent rmo limit sel */ #define LPCR_RMLS_SH (63-37) #define LPCR_ILE 0x02000000 /* !HV irqs set MSR:LE */ +#define LPCR_AIL 0x01800000 /* Alternate interrupt location */ #define LPCR_AIL_0 0x00000000 /* MMU off exception offset 0x0 */ #define LPCR_AIL_3 0x01800000 /* MMU on exception offset 0xc00...4xxx */ +#define LPCR_ONL 0x00040000 /* online - PURR/SPURR count */ #define LPCR_PECE 0x0001f000 /* powersave exit cause enable */ #define LPCR_PECEDP 0x00010000 /* directed priv dbells cause exit */ #define LPCR_PECEDH 0x00008000 /* directed hyp dbells cause exit */ diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c index 7ffa115..09de011 100644 --- a/arch/powerpc/kvm/book3s_hv.c +++ b/arch/powerpc/kvm/book3s_hv.c @@ -787,8 +787,11 @@ static void kvmppc_set_lpcr(struct kvm_vcpu *vcpu, u64 new_lpcr) /* * Userspace can only modify DPFD (default prefetch depth), * ILE (interrupt little-endian) and TC (translation control). + * On POWER8 userspace can also modify AIL (alt. interrupt loc.) */ mask = LPCR_DPFD | LPCR_ILE | LPCR_TC; + if (cpu_has_feature(CPU_FTR_ARCH_207S)) + mask |= LPCR_AIL; vc->lpcr = (vc->lpcr & ~mask) | (new_lpcr & mask); spin_unlock(&vc->lock); } @@ -2207,6 +2210,9 @@ static int kvmppc_core_init_vm_hv(struct kvm *kvm) LPCR_VPM0 | LPCR_VPM1; kvm->arch.vrma_slb_v = SLB_VSID_B_1T | (VRMA_VSID << SLB_VSID_SHIFT_1T); + /* On POWER8 turn on online bit to enable PURR/SPURR */ + if (cpu_has_feature(CPU_FTR_ARCH_207S)) + lpcr |= LPCR_ONL; } kvm->arch.lpcr = lpcr; -- 1.8.4.2 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
