Hi,
this patch conditionnaly disable privified insns into another insn.
Be sure to use an updated linux kernel before running with this xen!
Tested by boot+shutdown of dom0+2*domU
Tristan.
# HG changeset patch
# User [EMAIL PROTECTED]
# Node ID e514590977006bca331eb4470b09b96172ad83ea
# Parent 803d3b97f05da42569a7993e23824e058b6a9505
Disable handling of privified insns into another instructions.
This is controled by a static constant.
Signed-off-by: Tristan Gingold <[EMAIL PROTECTED]>
diff -r 803d3b97f05d -r e51459097700 xen/arch/ia64/xen/privop.c
--- a/xen/arch/ia64/xen/privop.c Thu Mar 16 11:49:52 2006
+++ b/xen/arch/ia64/xen/privop.c Thu Mar 16 12:16:28 2006
@@ -19,6 +19,9 @@
extern void zero_reflect_counts(void);
long priv_verbose=0;
+
+/* Set to 1 to handle privified instructions from the privify tool. */
+static const int privify_en = 0;
/**************************************************************************
Hypercall bundle creation
@@ -131,7 +134,8 @@
UINT src = inst.M28.r3;
// NOTE: ptc_e with source gr > 63 is emulated as a fc r(y-64)
- if (src > 63) return(vcpu_fc(vcpu,vcpu_get_gr(vcpu,src - 64)));
+ if (privify_en && src > 63)
+ return(vcpu_fc(vcpu,vcpu_get_gr(vcpu,src - 64)));
return vcpu_ptc_e(vcpu,vcpu_get_gr(vcpu,src));
}
@@ -178,7 +182,7 @@
UINT src = inst.M46.r3;
// NOTE: tpa with source gr > 63 is emulated as a ttag rx=r(y-64)
- if (src > 63)
+ if (privify_en && src > 63)
fault = vcpu_ttag(vcpu,vcpu_get_gr(vcpu,src-64),&padr);
else fault = vcpu_tpa(vcpu,vcpu_get_gr(vcpu,src),&padr);
if (fault == IA64_NO_FAULT)
@@ -193,7 +197,7 @@
UINT src = inst.M46.r3;
// NOTE: tak with source gr > 63 is emulated as a thash rx=r(y-64)
- if (src > 63)
+ if (privify_en && src > 63)
fault = vcpu_thash(vcpu,vcpu_get_gr(vcpu,src-64),&key);
else fault = vcpu_tak(vcpu,vcpu_get_gr(vcpu,src),&key);
if (fault == IA64_NO_FAULT)
@@ -280,7 +284,8 @@
// I26 and M29 are identical for these fields
UINT64 ar3 = inst.M29.ar3;
- if (inst.M29.r2 > 63 && inst.M29.ar3 < 8) { // privified mov from kr
+ if (privify_en && inst.M29.r2 > 63 && inst.M29.ar3 < 8) {
+ // privified mov from kr
UINT64 val;
if (vcpu_get_ar(vcpu,ar3,&val) != IA64_ILLOP_FAULT)
return vcpu_set_gr(vcpu, inst.M29.r2-64, val,0);
@@ -404,14 +409,17 @@
{
UINT64 val;
IA64FAULT fault;
+ int reg;
- if (inst.M43.r1 > 63) { // privified mov from cpuid
- fault = vcpu_get_cpuid(vcpu,vcpu_get_gr(vcpu,inst.M43.r3),&val);
+ reg = vcpu_get_gr(vcpu,inst.M43.r3);
+ if (privify_en && inst.M43.r1 > 63) {
+ // privified mov from cpuid
+ fault = vcpu_get_cpuid(vcpu,reg,&val);
if (fault == IA64_NO_FAULT)
return vcpu_set_gr(vcpu, inst.M43.r1-64, val, 0);
}
else {
- fault = vcpu_get_rr(vcpu,vcpu_get_gr(vcpu,inst.M43.r3),&val);
+ fault = vcpu_get_rr(vcpu,reg,&val);
if (fault == IA64_NO_FAULT)
return vcpu_set_gr(vcpu, inst.M43.r1, val, 0);
}
@@ -455,14 +463,17 @@
{
UINT64 val;
IA64FAULT fault;
+ int reg;
- if (inst.M43.r1 > 63) { // privified mov from pmd
- fault = vcpu_get_pmd(vcpu,vcpu_get_gr(vcpu,inst.M43.r3),&val);
+ reg = vcpu_get_gr(vcpu,inst.M43.r3);
+ if (privify_en && inst.M43.r1 > 63) {
+ // privified mov from pmd
+ fault = vcpu_get_pmd(vcpu,reg,&val);
if (fault == IA64_NO_FAULT)
return vcpu_set_gr(vcpu, inst.M43.r1-64, val, 0);
}
else {
- fault = vcpu_get_pmc(vcpu,vcpu_get_gr(vcpu,inst.M43.r3),&val);
+ fault = vcpu_get_pmc(vcpu,reg,&val);
if (fault == IA64_NO_FAULT)
return vcpu_set_gr(vcpu, inst.M43.r1, val, 0);
}
@@ -666,7 +677,7 @@
else if (inst.generic.major != 1) break;
x6 = inst.M29.x6;
if (x6 == 0x2a) {
- if (inst.M29.r2 > 63 && inst.M29.ar3 < 8)
+ if (privify_en && inst.M29.r2 > 63 && inst.M29.ar3 < 8)
privcnt.mov_from_ar++; // privified mov from kr
else privcnt.mov_to_ar_reg++;
return priv_mov_to_ar_reg(vcpu,inst);
@@ -674,14 +685,14 @@
if (inst.M29.x3 != 0) break;
if (!(pfunc = Mpriv_funcs[x6])) break;
if (x6 == 0x1e || x6 == 0x1f) { // tpa or tak are "special"
- if (inst.M46.r3 > 63) {
+ if (privify_en && inst.M46.r3 > 63) {
if (x6 == 0x1e) x6 = 0x1b;
else x6 = 0x1a;
}
}
- if (x6 == 52 && inst.M28.r3 > 63)
+ if (privify_en && x6 == 52 && inst.M28.r3 > 63)
privcnt.fc++;
- else if (x6 == 16 && inst.M43.r3 > 63)
+ else if (privify_en && x6 == 16 && inst.M43.r3 > 63)
privcnt.cpuid++;
else privcnt.Mpriv_cnt[x6]++;
return (*pfunc)(vcpu,inst);
@@ -718,7 +729,7 @@
#endif
if (inst.I26.x3 != 0) break; // I26.x3 == I27.x3
if (inst.I26.x6 == 0x2a) {
- if (inst.I26.r2 > 63 && inst.I26.ar3 < 8)
+ if (privify_en && inst.I26.r2 > 63 && inst.I26.ar3 < 8)
privcnt.mov_from_ar++; // privified mov from kr
else privcnt.mov_to_ar_reg++;
return priv_mov_to_ar_reg(vcpu,inst);
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