diff options
| author | Paul Mackerras <paulus@samba.org> | 2014-01-08 21:25:27 +1100 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2014-01-27 16:01:11 +0100 |
| commit | e0622bd9f2fccc8a801fa7aaf4fa6d7c728c3a78 (patch) | |
| tree | b6dc26f27461b4a62c8b016ad6ba6212c7ce06fe /arch/powerpc | |
| parent | aa31e843225769735b79795c955426c9479046a5 (diff) | |
| download | linux-e0622bd9f2fccc8a801fa7aaf4fa6d7c728c3a78.tar.bz2 | |
KVM: PPC: Book3S HV: Handle new LPCR bits on POWER8
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@samba.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/include/asm/reg.h | 2 | ||||
| -rw-r--r-- | arch/powerpc/kvm/book3s_hv.c | 6 |
2 files changed, 8 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h index 1248b40107ea..05ecb072540c 100644 --- a/arch/powerpc/include/asm/reg.h +++ b/arch/powerpc/include/asm/reg.h @@ -305,8 +305,10 @@ #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 1e9f4b45432b..d7f2ec6f1419 100644 --- a/arch/powerpc/kvm/book3s_hv.c +++ b/arch/powerpc/kvm/book3s_hv.c @@ -789,8 +789,11 @@ 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); } @@ -2166,6 +2169,9 @@ 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; |