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-rw-r--r--arch/mips/kvm/trace.h2
-rw-r--r--arch/mips/kvm/vz.c110
2 files changed, 110 insertions, 2 deletions
diff --git a/arch/mips/kvm/trace.h b/arch/mips/kvm/trace.h
index d80d37a1b82e..affde8a2c584 100644
--- a/arch/mips/kvm/trace.h
+++ b/arch/mips/kvm/trace.h
@@ -176,6 +176,8 @@ TRACE_EVENT(kvm_exit,
{ KVM_TRACE_COP0(16, 4), "Config4" }, \
{ KVM_TRACE_COP0(16, 5), "Config5" }, \
{ KVM_TRACE_COP0(16, 7), "Config7" }, \
+ { KVM_TRACE_COP0(17, 1), "MAAR" }, \
+ { KVM_TRACE_COP0(17, 2), "MAARI" }, \
{ KVM_TRACE_COP0(26, 0), "ECC" }, \
{ KVM_TRACE_COP0(30, 0), "ErrorEPC" }, \
{ KVM_TRACE_COP0(31, 2), "KScratch1" }, \
diff --git a/arch/mips/kvm/vz.c b/arch/mips/kvm/vz.c
index 450f946358ae..cbc6850cff02 100644
--- a/arch/mips/kvm/vz.c
+++ b/arch/mips/kvm/vz.c
@@ -134,7 +134,7 @@ static inline unsigned int kvm_vz_config5_guest_wrmask(struct kvm_vcpu *vcpu)
* Config3: M, MSAP, [BPG], ULRI, [DSP2P, DSPP], CTXTC, [ITL, LPA, VEIC,
* VInt, SP, CDMM, MT, SM, TL]
* Config4: M, [VTLBSizeExt, MMUSizeExt]
- * Config5: [MRP]
+ * Config5: MRP
*/
static inline unsigned int kvm_vz_config_user_wrmask(struct kvm_vcpu *vcpu)
@@ -177,7 +177,7 @@ static inline unsigned int kvm_vz_config4_user_wrmask(struct kvm_vcpu *vcpu)
static inline unsigned int kvm_vz_config5_user_wrmask(struct kvm_vcpu *vcpu)
{
- return kvm_vz_config5_guest_wrmask(vcpu);
+ return kvm_vz_config5_guest_wrmask(vcpu) | MIPS_CONF5_MRP;
}
static gpa_t kvm_vz_gva_to_gpa_cb(gva_t gva)
@@ -685,6 +685,41 @@ static int kvm_trap_vz_no_handler(struct kvm_vcpu *vcpu)
return RESUME_HOST;
}
+static unsigned long mips_process_maar(unsigned int op, unsigned long val)
+{
+ /* Mask off unused bits */
+ unsigned long mask = 0xfffff000 | MIPS_MAAR_S | MIPS_MAAR_VL;
+
+ if (read_gc0_pagegrain() & PG_ELPA)
+ mask |= 0x00ffffff00000000ull;
+ if (cpu_guest_has_mvh)
+ mask |= MIPS_MAAR_VH;
+
+ /* Set or clear VH */
+ if (op == mtc_op) {
+ /* clear VH */
+ val &= ~MIPS_MAAR_VH;
+ } else if (op == dmtc_op) {
+ /* set VH to match VL */
+ val &= ~MIPS_MAAR_VH;
+ if (val & MIPS_MAAR_VL)
+ val |= MIPS_MAAR_VH;
+ }
+
+ return val & mask;
+}
+
+static void kvm_write_maari(struct kvm_vcpu *vcpu, unsigned long val)
+{
+ struct mips_coproc *cop0 = vcpu->arch.cop0;
+
+ val &= MIPS_MAARI_INDEX;
+ if (val == MIPS_MAARI_INDEX)
+ kvm_write_sw_gc0_maari(cop0, ARRAY_SIZE(vcpu->arch.maar) - 1);
+ else if (val < ARRAY_SIZE(vcpu->arch.maar))
+ kvm_write_sw_gc0_maari(cop0, val);
+}
+
static enum emulation_result kvm_vz_gpsi_cop0(union mips_instruction inst,
u32 *opc, u32 cause,
struct kvm_run *run,
@@ -737,6 +772,15 @@ static enum emulation_result kvm_vz_gpsi_cop0(union mips_instruction inst,
MIPS_LLADDR_LLB;
else
val = 0;
+ } else if (rd == MIPS_CP0_LLADDR &&
+ sel == 1 && /* MAAR */
+ cpu_guest_has_maar &&
+ !cpu_guest_has_dyn_maar) {
+ /* MAARI must be in range */
+ BUG_ON(kvm_read_sw_gc0_maari(cop0) >=
+ ARRAY_SIZE(vcpu->arch.maar));
+ val = vcpu->arch.maar[
+ kvm_read_sw_gc0_maari(cop0)];
} else if ((rd == MIPS_CP0_PRID &&
(sel == 0 || /* PRid */
sel == 2 || /* CDMMBase */
@@ -746,6 +790,10 @@ static enum emulation_result kvm_vz_gpsi_cop0(union mips_instruction inst,
sel == 3)) || /* SRSMap */
(rd == MIPS_CP0_CONFIG &&
(sel == 7)) || /* Config7 */
+ (rd == MIPS_CP0_LLADDR &&
+ (sel == 2) && /* MAARI */
+ cpu_guest_has_maar &&
+ !cpu_guest_has_dyn_maar) ||
(rd == MIPS_CP0_ERRCTL &&
(sel == 0))) { /* ErrCtl */
val = cop0->reg[rd][sel];
@@ -793,6 +841,23 @@ static enum emulation_result kvm_vz_gpsi_cop0(union mips_instruction inst,
if (cpu_guest_has_rw_llb &&
!(val & MIPS_LLADDR_LLB))
write_gc0_lladdr(0);
+ } else if (rd == MIPS_CP0_LLADDR &&
+ sel == 1 && /* MAAR */
+ cpu_guest_has_maar &&
+ !cpu_guest_has_dyn_maar) {
+ val = mips_process_maar(inst.c0r_format.rs,
+ val);
+
+ /* MAARI must be in range */
+ BUG_ON(kvm_read_sw_gc0_maari(cop0) >=
+ ARRAY_SIZE(vcpu->arch.maar));
+ vcpu->arch.maar[kvm_read_sw_gc0_maari(cop0)] =
+ val;
+ } else if (rd == MIPS_CP0_LLADDR &&
+ (sel == 2) && /* MAARI */
+ cpu_guest_has_maar &&
+ !cpu_guest_has_dyn_maar) {
+ kvm_write_maari(vcpu, val);
} else if (rd == MIPS_CP0_ERRCTL &&
(sel == 0)) { /* ErrCtl */
/* ignore the written value */
@@ -1441,6 +1506,8 @@ static unsigned long kvm_vz_num_regs(struct kvm_vcpu *vcpu)
ret += ARRAY_SIZE(kvm_vz_get_one_regs_segments);
if (cpu_guest_has_htw)
ret += ARRAY_SIZE(kvm_vz_get_one_regs_htw);
+ if (cpu_guest_has_maar && !cpu_guest_has_dyn_maar)
+ ret += 1 + ARRAY_SIZE(vcpu->arch.maar);
ret += __arch_hweight8(cpu_data[0].guest.kscratch_mask);
return ret;
@@ -1492,6 +1559,19 @@ static int kvm_vz_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices)
return -EFAULT;
indices += ARRAY_SIZE(kvm_vz_get_one_regs_htw);
}
+ if (cpu_guest_has_maar && !cpu_guest_has_dyn_maar) {
+ for (i = 0; i < ARRAY_SIZE(vcpu->arch.maar); ++i) {
+ index = KVM_REG_MIPS_CP0_MAAR(i);
+ if (copy_to_user(indices, &index, sizeof(index)))
+ return -EFAULT;
+ ++indices;
+ }
+
+ index = KVM_REG_MIPS_CP0_MAARI;
+ if (copy_to_user(indices, &index, sizeof(index)))
+ return -EFAULT;
+ ++indices;
+ }
for (i = 0; i < 6; ++i) {
if (!cpu_guest_has_kscr(i + 2))
continue;
@@ -1689,6 +1769,19 @@ static int kvm_vz_get_one_reg(struct kvm_vcpu *vcpu,
return -EINVAL;
*v = read_gc0_config5();
break;
+ case KVM_REG_MIPS_CP0_MAAR(0) ... KVM_REG_MIPS_CP0_MAAR(0x3f):
+ if (!cpu_guest_has_maar || cpu_guest_has_dyn_maar)
+ return -EINVAL;
+ idx = reg->id - KVM_REG_MIPS_CP0_MAAR(0);
+ if (idx >= ARRAY_SIZE(vcpu->arch.maar))
+ return -EINVAL;
+ *v = vcpu->arch.maar[idx];
+ break;
+ case KVM_REG_MIPS_CP0_MAARI:
+ if (!cpu_guest_has_maar || cpu_guest_has_dyn_maar)
+ return -EINVAL;
+ *v = kvm_read_sw_gc0_maari(vcpu->arch.cop0);
+ break;
#ifdef CONFIG_64BIT
case KVM_REG_MIPS_CP0_XCONTEXT:
*v = read_gc0_xcontext();
@@ -1938,6 +2031,19 @@ static int kvm_vz_set_one_reg(struct kvm_vcpu *vcpu,
write_gc0_config5(v);
}
break;
+ case KVM_REG_MIPS_CP0_MAAR(0) ... KVM_REG_MIPS_CP0_MAAR(0x3f):
+ if (!cpu_guest_has_maar || cpu_guest_has_dyn_maar)
+ return -EINVAL;
+ idx = reg->id - KVM_REG_MIPS_CP0_MAAR(0);
+ if (idx >= ARRAY_SIZE(vcpu->arch.maar))
+ return -EINVAL;
+ vcpu->arch.maar[idx] = mips_process_maar(dmtc_op, v);
+ break;
+ case KVM_REG_MIPS_CP0_MAARI:
+ if (!cpu_guest_has_maar || cpu_guest_has_dyn_maar)
+ return -EINVAL;
+ kvm_write_maari(vcpu, v);
+ break;
#ifdef CONFIG_64BIT
case KVM_REG_MIPS_CP0_XCONTEXT:
write_gc0_xcontext(v);
generated by cgit v1.2.3 (git 2.25.1) at 2024-09-06 13:09:36 +0000