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authorAlexander Graf <agraf@suse.de>2010-04-20 02:49:53 +0200
committerAvi Kivity <avi@redhat.com>2010-05-17 12:19:07 +0300
commit251585b5d02152973dbc24c803ca322bb977d4a2 (patch)
treecce6b6beda97aaad86e5e31debc6f2fb2a4d8ebe /arch/powerpc/kvm/book3s_32_mmu_host.c
parent5156f274bb1ee1cfc22240445ef94f7dcfc9929d (diff)
KVM: PPC: Find HTAB ourselves
For KVM we need to find the location of the HTAB. We can either rely on internal data structures of the kernel or ask the hardware. Ben issued complaints about the internal data structure method, so let's switch it to our own inquiry of the HTAB. Now we're fully independend :-). CC: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/powerpc/kvm/book3s_32_mmu_host.c')
-rw-r--r--arch/powerpc/kvm/book3s_32_mmu_host.c21
1 files changed, 13 insertions, 8 deletions
diff --git a/arch/powerpc/kvm/book3s_32_mmu_host.c b/arch/powerpc/kvm/book3s_32_mmu_host.c
index 2bb67e633de2..0bb66005338f 100644
--- a/arch/powerpc/kvm/book3s_32_mmu_host.c
+++ b/arch/powerpc/kvm/book3s_32_mmu_host.c
@@ -54,6 +54,9 @@
#error Only 32 bit pages are supported for now
#endif
+static ulong htab;
+static u32 htabmask;
+
static void invalidate_pte(struct kvm_vcpu *vcpu, struct hpte_cache *pte)
{
volatile u32 *pteg;
@@ -217,14 +220,11 @@ static struct kvmppc_sid_map *find_sid_vsid(struct kvm_vcpu *vcpu, u64 gvsid)
return NULL;
}
-extern struct hash_pte *Hash;
-extern unsigned long _SDR1;
-
static u32 *kvmppc_mmu_get_pteg(struct kvm_vcpu *vcpu, u32 vsid, u32 eaddr,
bool primary)
{
- u32 page, hash, htabmask;
- ulong pteg = (ulong)Hash;
+ u32 page, hash;
+ ulong pteg = htab;
page = (eaddr & ~ESID_MASK) >> 12;
@@ -232,13 +232,12 @@ static u32 *kvmppc_mmu_get_pteg(struct kvm_vcpu *vcpu, u32 vsid, u32 eaddr,
if (!primary)
hash = ~hash;
- htabmask = ((_SDR1 & 0x1FF) << 16) | 0xFFC0;
hash &= htabmask;
pteg |= hash;
- dprintk_mmu("htab: %p | hash: %x | htabmask: %x | pteg: %lx\n",
- Hash, hash, htabmask, pteg);
+ dprintk_mmu("htab: %lx | hash: %x | htabmask: %x | pteg: %lx\n",
+ htab, hash, htabmask, pteg);
return (u32*)pteg;
}
@@ -453,6 +452,7 @@ int kvmppc_mmu_init(struct kvm_vcpu *vcpu)
{
struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
int err;
+ ulong sdr1;
err = __init_new_context();
if (err < 0)
@@ -474,5 +474,10 @@ int kvmppc_mmu_init(struct kvm_vcpu *vcpu)
vcpu3s->vsid_next = vcpu3s->vsid_first;
+ /* Remember where the HTAB is */
+ asm ( "mfsdr1 %0" : "=r"(sdr1) );
+ htabmask = ((sdr1 & 0x1FF) << 16) | 0xFFC0;
+ htab = (ulong)__va(sdr1 & 0xffff0000);
+
return 0;
}

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