path: root/arch/powerpc/kvm/book3s_hv_rm_mmu.c
diff options
authorPaul Mackerras <paulus@samba.org>2011-06-29 00:40:08 +0000
committerAvi Kivity <avi@redhat.com>2011-07-12 13:16:59 +0300
commit9e368f2915601cd5bc7f5fd638b58435b018bbd7 (patch)
tree104aa8204f17d2d43e4746f614510e256896cb7e /arch/powerpc/kvm/book3s_hv_rm_mmu.c
parent969391c58a4efb8411d6881179945f425ad9cbb5 (diff)
KVM: PPC: book3s_hv: Add support for PPC970-family processors
This adds support for running KVM guests in supervisor mode on those PPC970 processors that have a usable hypervisor mode. Unfortunately, Apple G5 machines have supervisor mode disabled (MSR[HV] is forced to 1), but the YDL PowerStation does have a usable hypervisor mode. There are several differences between the PPC970 and POWER7 in how guests are managed. These differences are accommodated using the CPU_FTR_ARCH_201 (PPC970) and CPU_FTR_ARCH_206 (POWER7) CPU feature bits. Notably, on PPC970: * The LPCR, LPID or RMOR registers don't exist, and the functions of those registers are provided by bits in HID4 and one bit in HID0. * External interrupts can be directed to the hypervisor, but unlike POWER7 they are masked by MSR[EE] in non-hypervisor modes and use SRR0/1 not HSRR0/1. * There is no virtual RMA (VRMA) mode; the guest must use an RMO (real mode offset) area. * The TLB entries are not tagged with the LPID, so it is necessary to flush the whole TLB on partition switch. Furthermore, when switching partitions we have to ensure that no other CPU is executing the tlbie or tlbsync instructions in either the old or the new partition, otherwise undefined behaviour can occur. * The PMU has 8 counters (PMC registers) rather than 6. * The DSCR, PURR, SPURR, AMR, AMOR, UAMOR registers don't exist. * The SLB has 64 entries rather than 32. * There is no mediated external interrupt facility, so if we switch to a guest that has a virtual external interrupt pending but the guest has MSR[EE] = 0, we have to arrange to have an interrupt pending for it so that we can get control back once it re-enables interrupts. We do that by sending ourselves an IPI with smp_send_reschedule after hard-disabling interrupts. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'arch/powerpc/kvm/book3s_hv_rm_mmu.c')
1 files changed, 4 insertions, 2 deletions
diff --git a/arch/powerpc/kvm/book3s_hv_rm_mmu.c b/arch/powerpc/kvm/book3s_hv_rm_mmu.c
index edb0aae901a3..fcfe6b055558 100644
--- a/arch/powerpc/kvm/book3s_hv_rm_mmu.c
+++ b/arch/powerpc/kvm/book3s_hv_rm_mmu.c
@@ -56,7 +56,8 @@ long kvmppc_h_enter(struct kvm_vcpu *vcpu, unsigned long flags,
/* only handle 4k, 64k and 16M pages for now */
porder = 12;
if (pteh & HPTE_V_LARGE) {
- if ((ptel & 0xf000) == 0x1000) {
+ if (cpu_has_feature(CPU_FTR_ARCH_206) &&
+ (ptel & 0xf000) == 0x1000) {
/* 64k page */
porder = 16;
} else if ((ptel & 0xff000) == 0) {
@@ -126,7 +127,8 @@ static unsigned long compute_tlbie_rb(unsigned long v, unsigned long r,
va_low &= 0x7ff;
if (v & HPTE_V_LARGE) {
rb |= 1; /* L field */
- if (r & 0xff000) {
+ if (cpu_has_feature(CPU_FTR_ARCH_206) &&
+ (r & 0xff000)) {
/* non-16MB large page, must be 64k */
/* (masks depend on page size) */
rb |= 0x1000; /* page encoding in LP field */

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