Update Linux to v5.4.148
Sourced from [1]
[1] https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.4.148.tar.gz
Change-Id: Ib3d26c5ba9b022e2e03533005c4fed4d7c30b61b
Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
diff --git a/arch/s390/kvm/gaccess.h b/arch/s390/kvm/gaccess.h
index f4c5175..4c56de5 100644
--- a/arch/s390/kvm/gaccess.h
+++ b/arch/s390/kvm/gaccess.h
@@ -18,6 +18,23 @@
/**
* kvm_s390_real_to_abs - convert guest real address to guest absolute address
+ * @prefix - guest prefix
+ * @gra - guest real address
+ *
+ * Returns the guest absolute address that corresponds to the passed guest real
+ * address @gra of by applying the given prefix.
+ */
+static inline unsigned long _kvm_s390_real_to_abs(u32 prefix, unsigned long gra)
+{
+ if (gra < 2 * PAGE_SIZE)
+ gra += prefix;
+ else if (gra >= prefix && gra < prefix + 2 * PAGE_SIZE)
+ gra -= prefix;
+ return gra;
+}
+
+/**
+ * kvm_s390_real_to_abs - convert guest real address to guest absolute address
* @vcpu - guest virtual cpu
* @gra - guest real address
*
@@ -27,13 +44,30 @@
static inline unsigned long kvm_s390_real_to_abs(struct kvm_vcpu *vcpu,
unsigned long gra)
{
- unsigned long prefix = kvm_s390_get_prefix(vcpu);
+ return _kvm_s390_real_to_abs(kvm_s390_get_prefix(vcpu), gra);
+}
- if (gra < 2 * PAGE_SIZE)
- gra += prefix;
- else if (gra >= prefix && gra < prefix + 2 * PAGE_SIZE)
- gra -= prefix;
- return gra;
+/**
+ * _kvm_s390_logical_to_effective - convert guest logical to effective address
+ * @psw: psw of the guest
+ * @ga: guest logical address
+ *
+ * Convert a guest logical address to an effective address by applying the
+ * rules of the addressing mode defined by bits 31 and 32 of the given PSW
+ * (extendended/basic addressing mode).
+ *
+ * Depending on the addressing mode, the upper 40 bits (24 bit addressing
+ * mode), 33 bits (31 bit addressing mode) or no bits (64 bit addressing
+ * mode) of @ga will be zeroed and the remaining bits will be returned.
+ */
+static inline unsigned long _kvm_s390_logical_to_effective(psw_t *psw,
+ unsigned long ga)
+{
+ if (psw_bits(*psw).eaba == PSW_BITS_AMODE_64BIT)
+ return ga;
+ if (psw_bits(*psw).eaba == PSW_BITS_AMODE_31BIT)
+ return ga & ((1UL << 31) - 1);
+ return ga & ((1UL << 24) - 1);
}
/**
@@ -52,13 +86,7 @@
static inline unsigned long kvm_s390_logical_to_effective(struct kvm_vcpu *vcpu,
unsigned long ga)
{
- psw_t *psw = &vcpu->arch.sie_block->gpsw;
-
- if (psw_bits(*psw).eaba == PSW_BITS_AMODE_64BIT)
- return ga;
- if (psw_bits(*psw).eaba == PSW_BITS_AMODE_31BIT)
- return ga & ((1UL << 31) - 1);
- return ga & ((1UL << 24) - 1);
+ return _kvm_s390_logical_to_effective(&vcpu->arch.sie_block->gpsw, ga);
}
/*
diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c
index d1ccc16..fa9483a 100644
--- a/arch/s390/kvm/interrupt.c
+++ b/arch/s390/kvm/interrupt.c
@@ -408,13 +408,13 @@
static void __set_cpu_idle(struct kvm_vcpu *vcpu)
{
kvm_s390_set_cpuflags(vcpu, CPUSTAT_WAIT);
- set_bit(vcpu->vcpu_id, vcpu->kvm->arch.idle_mask);
+ set_bit(kvm_vcpu_get_idx(vcpu), vcpu->kvm->arch.idle_mask);
}
static void __unset_cpu_idle(struct kvm_vcpu *vcpu)
{
kvm_s390_clear_cpuflags(vcpu, CPUSTAT_WAIT);
- clear_bit(vcpu->vcpu_id, vcpu->kvm->arch.idle_mask);
+ clear_bit(kvm_vcpu_get_idx(vcpu), vcpu->kvm->arch.idle_mask);
}
static void __reset_intercept_indicators(struct kvm_vcpu *vcpu)
@@ -2191,7 +2191,7 @@
return -EINVAL;
if (!test_kvm_facility(kvm, 72))
- return -ENOTSUPP;
+ return -EOPNOTSUPP;
mutex_lock(&fi->ais_lock);
ais.simm = fi->simm;
@@ -2500,7 +2500,7 @@
int ret = 0;
if (!test_kvm_facility(kvm, 72))
- return -ENOTSUPP;
+ return -EOPNOTSUPP;
if (copy_from_user(&req, (void __user *)attr->addr, sizeof(req)))
return -EFAULT;
@@ -2580,7 +2580,7 @@
struct kvm_s390_ais_all ais;
if (!test_kvm_facility(kvm, 72))
- return -ENOTSUPP;
+ return -EOPNOTSUPP;
if (copy_from_user(&ais, (void __user *)attr->addr, sizeof(ais)))
return -EFAULT;
@@ -2984,18 +2984,18 @@
static void __airqs_kick_single_vcpu(struct kvm *kvm, u8 deliverable_mask)
{
- int vcpu_id, online_vcpus = atomic_read(&kvm->online_vcpus);
+ int vcpu_idx, online_vcpus = atomic_read(&kvm->online_vcpus);
struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int;
struct kvm_vcpu *vcpu;
- for_each_set_bit(vcpu_id, kvm->arch.idle_mask, online_vcpus) {
- vcpu = kvm_get_vcpu(kvm, vcpu_id);
+ for_each_set_bit(vcpu_idx, kvm->arch.idle_mask, online_vcpus) {
+ vcpu = kvm_get_vcpu(kvm, vcpu_idx);
if (psw_ioint_disabled(vcpu))
continue;
deliverable_mask &= (u8)(vcpu->arch.sie_block->gcr[6] >> 24);
if (deliverable_mask) {
/* lately kicked but not yet running */
- if (test_and_set_bit(vcpu_id, gi->kicked_mask))
+ if (test_and_set_bit(vcpu_idx, gi->kicked_mask))
return;
kvm_s390_vcpu_wakeup(vcpu);
return;
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index d047e84..9ed2fee 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -318,31 +318,31 @@
static inline int plo_test_bit(unsigned char nr)
{
- register unsigned long r0 asm("0") = (unsigned long) nr | 0x100;
+ unsigned long function = (unsigned long)nr | 0x100;
int cc;
asm volatile(
+ " lgr 0,%[function]\n"
/* Parameter registers are ignored for "test bit" */
" plo 0,0,0,0(0)\n"
" ipm %0\n"
" srl %0,28\n"
: "=d" (cc)
- : "d" (r0)
- : "cc");
+ : [function] "d" (function)
+ : "cc", "0");
return cc == 0;
}
static __always_inline void __insn32_query(unsigned int opcode, u8 *query)
{
- register unsigned long r0 asm("0") = 0; /* query function */
- register unsigned long r1 asm("1") = (unsigned long) query;
-
asm volatile(
- /* Parameter regs are ignored */
+ " lghi 0,0\n"
+ " lgr 1,%[query]\n"
+ /* Parameter registers are ignored */
" .insn rrf,%[opc] << 16,2,4,6,0\n"
:
- : "d" (r0), "a" (r1), [opc] "i" (opcode)
- : "cc", "memory");
+ : [query] "d" ((unsigned long)query), [opc] "i" (opcode)
+ : "cc", "memory", "0", "1");
}
#define INSN_SORTL 0xb938
@@ -1932,6 +1932,9 @@
start = slot + 1;
}
+ if (start >= slots->used_slots)
+ return slots->used_slots - 1;
+
if (gfn >= memslots[start].base_gfn &&
gfn < memslots[start].base_gfn + memslots[start].npages) {
atomic_set(&slots->lru_slot, start);
@@ -2863,9 +2866,7 @@
vcpu->arch.sie_block->gcr[14] = CR14_UNUSED_32 |
CR14_UNUSED_33 |
CR14_EXTERNAL_DAMAGE_SUBMASK;
- /* make sure the new fpc will be lazily loaded */
- save_fpu_regs();
- current->thread.fpu.fpc = 0;
+ vcpu->run->s.regs.fpc = 0;
vcpu->arch.sie_block->gbea = 1;
vcpu->arch.sie_block->pp = 0;
vcpu->arch.sie_block->fpf &= ~FPF_BPBC;
@@ -3725,7 +3726,7 @@
kvm_s390_patch_guest_per_regs(vcpu);
}
- clear_bit(vcpu->vcpu_id, vcpu->kvm->arch.gisa_int.kicked_mask);
+ clear_bit(kvm_vcpu_get_idx(vcpu), vcpu->kvm->arch.gisa_int.kicked_mask);
vcpu->arch.sie_block->icptcode = 0;
cpuflags = atomic_read(&vcpu->arch.sie_block->cpuflags);
@@ -3979,16 +3980,16 @@
current->thread.fpu.fpc = vcpu->arch.host_fpregs.fpc;
current->thread.fpu.regs = vcpu->arch.host_fpregs.regs;
if (MACHINE_HAS_GS) {
+ preempt_disable();
__ctl_set_bit(2, 4);
if (vcpu->arch.gs_enabled)
save_gs_cb(current->thread.gs_cb);
- preempt_disable();
current->thread.gs_cb = vcpu->arch.host_gscb;
restore_gs_cb(vcpu->arch.host_gscb);
- preempt_enable();
if (!vcpu->arch.host_gscb)
__ctl_clear_bit(2, 4);
vcpu->arch.host_gscb = NULL;
+ preempt_enable();
}
/* SIE will save etoken directly into SDNX and therefore kvm_run */
}
@@ -4354,7 +4355,7 @@
switch (ioctl) {
case KVM_S390_STORE_STATUS:
idx = srcu_read_lock(&vcpu->kvm->srcu);
- r = kvm_s390_vcpu_store_status(vcpu, arg);
+ r = kvm_s390_store_status_unloaded(vcpu, arg);
srcu_read_unlock(&vcpu->kvm->srcu, idx);
break;
case KVM_S390_SET_INITIAL_PSW: {
diff --git a/arch/s390/kvm/kvm-s390.h b/arch/s390/kvm/kvm-s390.h
index 6d9448d..63d94a5 100644
--- a/arch/s390/kvm/kvm-s390.h
+++ b/arch/s390/kvm/kvm-s390.h
@@ -67,7 +67,7 @@
static inline int is_vcpu_idle(struct kvm_vcpu *vcpu)
{
- return test_bit(vcpu->vcpu_id, vcpu->kvm->arch.idle_mask);
+ return test_bit(kvm_vcpu_get_idx(vcpu), vcpu->kvm->arch.idle_mask);
}
static inline int kvm_is_ucontrol(struct kvm *kvm)
diff --git a/arch/s390/kvm/priv.c b/arch/s390/kvm/priv.c
index ed52ffa..560310e 100644
--- a/arch/s390/kvm/priv.c
+++ b/arch/s390/kvm/priv.c
@@ -626,10 +626,12 @@
* available for the guest are AQIC and TAPQ with the t bit set
* since we do not set IC.3 (FIII) we currently will only intercept
* the AQIC function code.
+ * Note: running nested under z/VM can result in intercepts for other
+ * function codes, e.g. PQAP(QCI). We do not support this and bail out.
*/
reg0 = vcpu->run->s.regs.gprs[0];
fc = (reg0 >> 24) & 0xff;
- if (WARN_ON_ONCE(fc != 0x03))
+ if (fc != 0x03)
return -EOPNOTSUPP;
/* PQAP instruction is allowed for guest kernel only */
diff --git a/arch/s390/kvm/vsie.c b/arch/s390/kvm/vsie.c
index 076090f..4f6c22d 100644
--- a/arch/s390/kvm/vsie.c
+++ b/arch/s390/kvm/vsie.c
@@ -1202,6 +1202,7 @@
scb_s->iprcc = PGM_ADDRESSING;
scb_s->pgmilc = 4;
scb_s->gpsw.addr = __rewind_psw(scb_s->gpsw, 4);
+ rc = 1;
}
return rc;
}