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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] Minor code restructure in vcpu_translate (prep for more later)
# HG changeset patch
# User djm@xxxxxxxxxxxxxxx
# Node ID 8463ce38eda3efe46182ab082d6bd8541ea6a67e
# Parent eaedc6b4ec0fdbb5b14ac62f0854477f50fa55b2
Minor code restructure in vcpu_translate (prep for more later)
diff -r eaedc6b4ec0f -r 8463ce38eda3 xen/arch/ia64/asm-offsets.c
--- a/xen/arch/ia64/asm-offsets.c Fri Sep 23 21:41:28 2005
+++ b/xen/arch/ia64/asm-offsets.c Thu Sep 29 19:16:40 2005
@@ -65,6 +65,7 @@
DEFINE(XSI_INCOMPL_REG_OFS, offsetof(mapped_regs_t,
incomplete_regframe));
DEFINE(XSI_PEND_OFS, offsetof(mapped_regs_t, pending_interruption));
DEFINE(XSI_RR0_OFS, offsetof(mapped_regs_t, rrs[0]));
+ DEFINE(XSI_IHA_OFS, offsetof(mapped_regs_t, iha));
DEFINE(XSI_TPR_OFS, offsetof(mapped_regs_t, tpr));
DEFINE(XSI_PTA_OFS, offsetof(mapped_regs_t, pta));
DEFINE(XSI_ITV_OFS, offsetof(mapped_regs_t, itv));
diff -r eaedc6b4ec0f -r 8463ce38eda3 xen/arch/ia64/xen/process.c
--- a/xen/arch/ia64/xen/process.c Fri Sep 23 21:41:28 2005
+++ b/xen/arch/ia64/xen/process.c Thu Sep 29 19:16:40 2005
@@ -275,7 +275,7 @@
void ia64_do_page_fault (unsigned long address, unsigned long isr, struct
pt_regs *regs, unsigned long itir)
{
- unsigned long iip = regs->cr_iip;
+ unsigned long iip = regs->cr_iip, iha;
// FIXME should validate address here
unsigned long pteval;
unsigned long is_data = !((isr >> IA64_ISR_X_BIT) & 1UL);
@@ -294,7 +294,7 @@
return;
}
- fault = vcpu_translate(current,address,is_data,&pteval,&itir);
+ fault = vcpu_translate(current,address,is_data,&pteval,&itir,&iha);
if (fault == IA64_NO_FAULT)
{
pteval = translate_domain_pte(pteval,address,itir);
diff -r eaedc6b4ec0f -r 8463ce38eda3 xen/arch/ia64/xen/vcpu.c
--- a/xen/arch/ia64/xen/vcpu.c Fri Sep 23 21:41:28 2005
+++ b/xen/arch/ia64/xen/vcpu.c Thu Sep 29 19:16:40 2005
@@ -1354,9 +1354,9 @@
unsigned long vhpt_translate_count = 0;
-IA64FAULT vcpu_translate(VCPU *vcpu, UINT64 address, BOOLEAN is_data, UINT64
*pteval, UINT64 *itir)
-{
- unsigned long pta, pta_mask, iha, pte, ps;
+IA64FAULT vcpu_translate(VCPU *vcpu, UINT64 address, BOOLEAN is_data, UINT64
*pteval, UINT64 *itir, UINT64 *iha)
+{
+ unsigned long pta, pta_mask, pte, ps;
TR_ENTRY *trp;
ia64_rr rr;
@@ -1398,51 +1398,45 @@
/* check guest VHPT */
pta = PSCB(vcpu,pta);
rr.rrval = PSCB(vcpu,rrs)[address>>61];
- if (rr.ve && (pta & IA64_PTA_VE))
- {
- if (pta & IA64_PTA_VF)
- {
- /* long format VHPT - not implemented */
- return (is_data ? IA64_DATA_TLB_VECTOR :
IA64_INST_TLB_VECTOR);
- }
- else
- {
- /* short format VHPT */
-
- /* avoid recursively walking VHPT */
- pta_mask = (itir_mask(pta) << 3) >> 3;
- if (((address ^ pta) & pta_mask) == 0)
- return (is_data ? IA64_DATA_TLB_VECTOR :
IA64_INST_TLB_VECTOR);
-
- vcpu_thash(vcpu, address, &iha);
- if (__copy_from_user(&pte, (void *)iha, sizeof(pte)) !=
0)
- return IA64_VHPT_FAULT;
-
- /*
- * Optimisation: this VHPT walker aborts on not-present
pages
- * instead of inserting a not-present translation, this
allows
- * vectoring directly to the miss handler.
- \ */
- if (pte & _PAGE_P)
- {
- *pteval = pte;
- *itir = vcpu_get_itir_on_fault(vcpu,address);
- vhpt_translate_count++;
- return IA64_NO_FAULT;
- }
- return (is_data ? IA64_DATA_TLB_VECTOR :
IA64_INST_TLB_VECTOR);
- }
- }
- return (is_data ? IA64_ALT_DATA_TLB_VECTOR : IA64_ALT_INST_TLB_VECTOR);
+ if (!rr.ve || !(pta & IA64_PTA_VE))
+ return (is_data ? IA64_ALT_DATA_TLB_VECTOR :
+ IA64_ALT_INST_TLB_VECTOR);
+ if (pta & IA64_PTA_VF) { /* long format VHPT - not implemented */
+ // thash won't work right?
+ panic_domain(vcpu_regs(vcpu),"can't do long format VHPT\n");
+ //return (is_data ? IA64_DATA_TLB_VECTOR:IA64_INST_TLB_VECTOR);
+ }
+
+ /* avoid recursively walking (short format) VHPT */
+ pta_mask = (itir_mask(pta) << 3) >> 3;
+ if (((address ^ pta) & pta_mask) == 0)
+ return (is_data ? IA64_DATA_TLB_VECTOR : IA64_INST_TLB_VECTOR);
+
+ vcpu_thash(vcpu, address, iha);
+ if (__copy_from_user(&pte, (void *)(*iha), sizeof(pte)) != 0)
+ return IA64_VHPT_FAULT;
+
+ /*
+ * Optimisation: this VHPT walker aborts on not-present pages
+ * instead of inserting a not-present translation, this allows
+ * vectoring directly to the miss handler.
+ */
+ if (pte & _PAGE_P) {
+ *pteval = pte;
+ *itir = vcpu_get_itir_on_fault(vcpu,address);
+ vhpt_translate_count++;
+ return IA64_NO_FAULT;
+ }
+ return (is_data ? IA64_DATA_TLB_VECTOR : IA64_INST_TLB_VECTOR);
}
IA64FAULT vcpu_tpa(VCPU *vcpu, UINT64 vadr, UINT64 *padr)
{
- UINT64 pteval, itir, mask;
+ UINT64 pteval, itir, mask, iha;
IA64FAULT fault;
in_tpa = 1;
- fault = vcpu_translate(vcpu, vadr, 1, &pteval, &itir);
+ fault = vcpu_translate(vcpu, vadr, 1, &pteval, &itir, &iha);
in_tpa = 0;
if (fault == IA64_NO_FAULT)
{
diff -r eaedc6b4ec0f -r 8463ce38eda3 xen/include/asm-ia64/vcpu.h
--- a/xen/include/asm-ia64/vcpu.h Fri Sep 23 21:41:28 2005
+++ b/xen/include/asm-ia64/vcpu.h Thu Sep 29 19:16:40 2005
@@ -133,7 +133,7 @@
extern IA64FAULT vcpu_ptc_ga(VCPU *vcpu, UINT64 vadr, UINT64 addr_range);
extern IA64FAULT vcpu_ptr_d(VCPU *vcpu,UINT64 vadr, UINT64 addr_range);
extern IA64FAULT vcpu_ptr_i(VCPU *vcpu,UINT64 vadr, UINT64 addr_range);
-extern IA64FAULT vcpu_translate(VCPU *vcpu, UINT64 address, BOOLEAN is_data,
UINT64 *pteval, UINT64 *itir);
+extern IA64FAULT vcpu_translate(VCPU *vcpu, UINT64 address, BOOLEAN is_data,
UINT64 *pteval, UINT64 *itir, UINT64 *iha);
extern IA64FAULT vcpu_tpa(VCPU *vcpu, UINT64 vadr, UINT64 *padr);
/* misc */
extern IA64FAULT vcpu_rfi(VCPU *vcpu);
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