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Subject[PATCH 01/30] KVM: ia64: vTLB change for enabling windows 2008 boot
Date
From: Xiantao Zhang <xiantao.zhang@intel.com>

Simply the logic of hash vTLB, and export kvm_gpa_to_mpa.

Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
---
arch/ia64/kvm/vcpu.h | 4 ++--
arch/ia64/kvm/vtlb.c | 39 +++++++++++++++++----------------------
2 files changed, 19 insertions(+), 24 deletions(-)
diff --git a/arch/ia64/kvm/vcpu.h b/arch/ia64/kvm/vcpu.h
index b2f12a5..042af92 100644
--- a/arch/ia64/kvm/vcpu.h
+++ b/arch/ia64/kvm/vcpu.h
@@ -703,7 +703,7 @@ extern u64 guest_vhpt_lookup(u64 iha, u64 *pte);
extern void thash_purge_entries(struct kvm_vcpu *v, u64 va, u64 ps);
extern void thash_purge_entries_remote(struct kvm_vcpu *v, u64 va, u64 ps);
extern u64 translate_phy_pte(u64 *pte, u64 itir, u64 va);
-extern int thash_purge_and_insert(struct kvm_vcpu *v, u64 pte,
+extern void thash_purge_and_insert(struct kvm_vcpu *v, u64 pte,
u64 itir, u64 ifa, int type);
extern void thash_purge_all(struct kvm_vcpu *v);
extern struct thash_data *vtlb_lookup(struct kvm_vcpu *v,
@@ -738,7 +738,7 @@ void kvm_init_vhpt(struct kvm_vcpu *v);
void thash_init(struct thash_cb *hcb, u64 sz);

void panic_vm(struct kvm_vcpu *v, const char *fmt, ...);
-
+u64 kvm_gpa_to_mpa(u64 gpa);
extern u64 ia64_call_vsa(u64 proc, u64 arg1, u64 arg2, u64 arg3,
u64 arg4, u64 arg5, u64 arg6, u64 arg7);

diff --git a/arch/ia64/kvm/vtlb.c b/arch/ia64/kvm/vtlb.c
index ac94867..38232b3 100644
--- a/arch/ia64/kvm/vtlb.c
+++ b/arch/ia64/kvm/vtlb.c
@@ -164,11 +164,11 @@ static void vhpt_insert(u64 pte, u64 itir, u64 ifa, u64 gpte)
unsigned long ps, gpaddr;

ps = itir_ps(itir);
+ rr.val = ia64_get_rr(ifa);

- gpaddr = ((gpte & _PAGE_PPN_MASK) >> ps << ps) |
- (ifa & ((1UL << ps) - 1));
+ gpaddr = ((gpte & _PAGE_PPN_MASK) >> ps << ps) |
+ (ifa & ((1UL << ps) - 1));

- rr.val = ia64_get_rr(ifa);
head = (struct thash_data *)ia64_thash(ifa);
head->etag = INVALID_TI_TAG;
ia64_mf();
@@ -412,16 +412,14 @@ u64 translate_phy_pte(u64 *pte, u64 itir, u64 va)

/*
* Purge overlap TCs and then insert the new entry to emulate itc ops.
- * Notes: Only TC entry can purge and insert.
- * 1 indicates this is MMIO
+ * Notes: Only TC entry can purge and insert.
*/
-int thash_purge_and_insert(struct kvm_vcpu *v, u64 pte, u64 itir,
+void thash_purge_and_insert(struct kvm_vcpu *v, u64 pte, u64 itir,
u64 ifa, int type)
{
u64 ps;
u64 phy_pte, io_mask, index;
union ia64_rr vrr, mrr;
- int ret = 0;

ps = itir_ps(itir);
vrr.val = vcpu_get_rr(v, ifa);
@@ -441,25 +439,19 @@ int thash_purge_and_insert(struct kvm_vcpu *v, u64 pte, u64 itir,
phy_pte &= ~_PAGE_MA_MASK;
}

- if (pte & VTLB_PTE_IO)
- ret = 1;
-
vtlb_purge(v, ifa, ps);
vhpt_purge(v, ifa, ps);

- if (ps == mrr.ps) {
- if (!(pte&VTLB_PTE_IO)) {
- vhpt_insert(phy_pte, itir, ifa, pte);
- } else {
- vtlb_insert(v, pte, itir, ifa);
- vcpu_quick_region_set(VMX(v, tc_regions), ifa);
- }
- } else if (ps > mrr.ps) {
+ if ((ps != mrr.ps) || (pte & VTLB_PTE_IO)) {
vtlb_insert(v, pte, itir, ifa);
vcpu_quick_region_set(VMX(v, tc_regions), ifa);
- if (!(pte&VTLB_PTE_IO))
- vhpt_insert(phy_pte, itir, ifa, pte);
- } else {
+ }
+ if (pte & VTLB_PTE_IO)
+ return;
+
+ if (ps >= mrr.ps)
+ vhpt_insert(phy_pte, itir, ifa, pte);
+ else {
u64 psr;
phy_pte &= ~PAGE_FLAGS_RV_MASK;
psr = ia64_clear_ic();
@@ -469,7 +461,6 @@ int thash_purge_and_insert(struct kvm_vcpu *v, u64 pte, u64 itir,
if (!(pte&VTLB_PTE_IO))
mark_pages_dirty(v, pte, ps);

- return ret;
}

/*
@@ -570,6 +561,10 @@ void thash_init(struct thash_cb *hcb, u64 sz)
u64 kvm_get_mpt_entry(u64 gpfn)
{
u64 *base = (u64 *) KVM_P2M_BASE;
+
+ if (gpfn >= (KVM_P2M_SIZE >> 3))
+ panic_vm(current_vcpu, "Invalid gpfn =%lx\n", gpfn);
+
return *(base + gpfn);
}

--
1.6.0.6


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