[PATCH 11/15] KVM: Move vcpu_load to arch-specific kvm_arch_vcpu_ioctl_set_guest_debug
Christoffer Dall
christoffer.dall at linaro.org
Sat Nov 25 12:57:14 PST 2017
Move vcpu_load() and vcpu_put() into the architecture specific
implementations of kvm_arch_vcpu_ioctl_set_guest_debug().
Signed-off-by: Christoffer Dall <christoffer.dall at linaro.org>
---
arch/arm64/kvm/guest.c | 17 ++++++++++++++---
arch/powerpc/kvm/book3s.c | 6 ++++++
arch/powerpc/kvm/booke.c | 21 +++++++++++++++------
arch/s390/kvm/kvm-s390.c | 14 +++++++++++---
arch/x86/kvm/x86.c | 6 +++++-
virt/kvm/kvm_main.c | 4 ----
6 files changed, 51 insertions(+), 17 deletions(-)
diff --git a/arch/arm64/kvm/guest.c b/arch/arm64/kvm/guest.c
index 5c7f657dd207..0375d1f977c8 100644
--- a/arch/arm64/kvm/guest.c
+++ b/arch/arm64/kvm/guest.c
@@ -361,10 +361,18 @@ int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
struct kvm_guest_debug *dbg)
{
+ int ret;
+
+ ret = vcpu_load(vcpu);
+ if (ret)
+ return ret;
+
trace_kvm_set_guest_debug(vcpu, dbg->control);
- if (dbg->control & ~KVM_GUESTDBG_VALID_MASK)
- return -EINVAL;
+ if (dbg->control & ~KVM_GUESTDBG_VALID_MASK) {
+ ret = -EINVAL;
+ goto out;
+ }
if (dbg->control & KVM_GUESTDBG_ENABLE) {
vcpu->guest_debug = dbg->control;
@@ -378,7 +386,10 @@ int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
/* If not enabled clear all flags */
vcpu->guest_debug = 0;
}
- return 0;
+
+out:
+ vcpu_put(vcpu);
+ return ret;
}
int kvm_arm_vcpu_arch_set_attr(struct kvm_vcpu *vcpu,
diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c
index 63e68c24af0e..6d9885b6e77c 100644
--- a/arch/powerpc/kvm/book3s.c
+++ b/arch/powerpc/kvm/book3s.c
@@ -765,7 +765,13 @@ int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
struct kvm_guest_debug *dbg)
{
+ int r;
+
+ r = vcpu_load(vcpu);
+ if (r)
+ return r;
vcpu->guest_debug = dbg->control;
+ vcpu_put(vcpu);
return 0;
}
diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c
index 8069d93bf654..fcc033a4d958 100644
--- a/arch/powerpc/kvm/booke.c
+++ b/arch/powerpc/kvm/booke.c
@@ -2031,12 +2031,17 @@ int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
{
struct debug_reg *dbg_reg;
int n, b = 0, w = 0;
+ int ret;
+
+ ret = vcpu_load(vcpu);
+ if (ret)
+ return ret;
if (!(dbg->control & KVM_GUESTDBG_ENABLE)) {
vcpu->arch.dbg_reg.dbcr0 = 0;
vcpu->guest_debug = 0;
kvm_guest_protect_msr(vcpu, MSR_DE, false);
- return 0;
+ goto out;
}
kvm_guest_protect_msr(vcpu, MSR_DE, true);
@@ -2068,8 +2073,9 @@ int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
#endif
if (!(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP))
- return 0;
+ goto out;
+ ret = -EINVAL;
for (n = 0; n < (KVMPPC_BOOKE_IAC_NUM + KVMPPC_BOOKE_DAC_NUM); n++) {
uint64_t addr = dbg->arch.bp[n].addr;
uint32_t type = dbg->arch.bp[n].type;
@@ -2080,21 +2086,24 @@ int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
if (type & ~(KVMPPC_DEBUG_WATCH_READ |
KVMPPC_DEBUG_WATCH_WRITE |
KVMPPC_DEBUG_BREAKPOINT))
- return -EINVAL;
+ goto out;
if (type & KVMPPC_DEBUG_BREAKPOINT) {
/* Setting H/W breakpoint */
if (kvmppc_booke_add_breakpoint(dbg_reg, addr, b++))
- return -EINVAL;
+ goto out;
} else {
/* Setting H/W watchpoint */
if (kvmppc_booke_add_watchpoint(dbg_reg, addr,
type, w++))
- return -EINVAL;
+ goto out;
}
}
- return 0;
+ ret = 0;
+out:
+ vcpu_put(vcpu);
+ return ret;
}
void kvmppc_booke_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index aa76d2988178..ac26d95444c9 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -2819,15 +2819,20 @@ int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
struct kvm_guest_debug *dbg)
{
- int rc = 0;
+ int rc;
+
+ rc = vcpu_load(vcpu);
+ if (rc)
+ return rc;
vcpu->guest_debug = 0;
kvm_s390_clear_bp_data(vcpu);
+ rc = -EINVAL;
if (dbg->control & ~VALID_GUESTDBG_FLAGS)
- return -EINVAL;
+ goto out;
if (!sclp.has_gpere)
- return -EINVAL;
+ goto out;
if (dbg->control & KVM_GUESTDBG_ENABLE) {
vcpu->guest_debug = dbg->control;
@@ -2847,6 +2852,9 @@ int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
atomic_andnot(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags);
}
+ rc = 0;
+out:
+ vcpu_put(vcpu);
return rc;
}
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index ae8685155d11..09135bd759a4 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -7596,6 +7596,10 @@ int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
unsigned long rflags;
int i, r;
+ r = vcpu_load(vcpu);
+ if (r)
+ return r;
+
if (dbg->control & (KVM_GUESTDBG_INJECT_DB | KVM_GUESTDBG_INJECT_BP)) {
r = -EBUSY;
if (vcpu->arch.exception.pending)
@@ -7641,7 +7645,7 @@ int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
r = 0;
out:
-
+ vcpu_put(vcpu);
return r;
}
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 173f98d9c58d..6b87c24c60da 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -2650,11 +2650,7 @@ static long kvm_vcpu_ioctl(struct file *filp,
r = -EFAULT;
if (copy_from_user(&dbg, argp, sizeof(dbg)))
goto out;
- r = vcpu_load(vcpu);
- if (r)
- goto out;
r = kvm_arch_vcpu_ioctl_set_guest_debug(vcpu, &dbg);
- vcpu_put(vcpu);
break;
}
case KVM_SET_SIGNAL_MASK: {
--
2.14.2
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