diff options
author | Paul Mackerras <paulus@samba.org> | 2014-06-02 01:03:00 (GMT) |
---|---|---|
committer | Alexander Graf <agraf@suse.de> | 2014-07-28 13:22:18 (GMT) |
commit | ae2113a4f1a6cd5a3cd3d75f394547922758e9ac (patch) | |
tree | 59a1dbf6369d853d0ad76c62a0333c47bb8992d0 /arch/powerpc | |
parent | 699a0ea0823d32030b0666b28ff8633960f7ffa7 (diff) | |
download | linux-ae2113a4f1a6cd5a3cd3d75f394547922758e9ac.tar.xz |
KVM: PPC: Book3S: Allow only implemented hcalls to be enabled or disabled
This adds code to check that when the KVM_CAP_PPC_ENABLE_HCALL
capability is used to enable or disable in-kernel handling of an
hcall, that the hcall is actually implemented by the kernel.
If not an EINVAL error is returned.
This also checks the default-enabled list of hcalls and prints a
warning if any hcall there is not actually implemented.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'arch/powerpc')
-rw-r--r-- | arch/powerpc/include/asm/kvm_book3s.h | 3 | ||||
-rw-r--r-- | arch/powerpc/include/asm/kvm_ppc.h | 2 | ||||
-rw-r--r-- | arch/powerpc/kvm/book3s.c | 5 | ||||
-rw-r--r-- | arch/powerpc/kvm/book3s_hv.c | 31 | ||||
-rw-r--r-- | arch/powerpc/kvm/book3s_hv_builtin.c | 13 | ||||
-rw-r--r-- | arch/powerpc/kvm/book3s_hv_rmhandlers.S | 1 | ||||
-rw-r--r-- | arch/powerpc/kvm/book3s_pr.c | 3 | ||||
-rw-r--r-- | arch/powerpc/kvm/book3s_pr_papr.c | 29 | ||||
-rw-r--r-- | arch/powerpc/kvm/powerpc.c | 2 |
9 files changed, 84 insertions, 5 deletions
diff --git a/arch/powerpc/include/asm/kvm_book3s.h b/arch/powerpc/include/asm/kvm_book3s.h index 052ab2a..ceb70aa 100644 --- a/arch/powerpc/include/asm/kvm_book3s.h +++ b/arch/powerpc/include/asm/kvm_book3s.h @@ -146,6 +146,7 @@ extern void kvmppc_mmu_invalidate_pte(struct kvm_vcpu *vcpu, struct hpte_cache * extern int kvmppc_mmu_hpte_sysinit(void); extern void kvmppc_mmu_hpte_sysexit(void); extern int kvmppc_mmu_hv_init(void); +extern int kvmppc_book3s_hcall_implemented(struct kvm *kvm, unsigned long hc); extern int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr, bool data); extern int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr, bool data); @@ -188,6 +189,8 @@ extern u32 kvmppc_alignment_dsisr(struct kvm_vcpu *vcpu, unsigned int inst); extern ulong kvmppc_alignment_dar(struct kvm_vcpu *vcpu, unsigned int inst); extern int kvmppc_h_pr(struct kvm_vcpu *vcpu, unsigned long cmd); extern void kvmppc_pr_init_default_hcalls(struct kvm *kvm); +extern int kvmppc_hcall_impl_pr(unsigned long cmd); +extern int kvmppc_hcall_impl_hv_realmode(unsigned long cmd); extern void kvmppc_copy_to_svcpu(struct kvmppc_book3s_shadow_vcpu *svcpu, struct kvm_vcpu *vcpu); extern void kvmppc_copy_from_svcpu(struct kvm_vcpu *vcpu, diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/asm/kvm_ppc.h index 9c89cdd..e2fd5a1 100644 --- a/arch/powerpc/include/asm/kvm_ppc.h +++ b/arch/powerpc/include/asm/kvm_ppc.h @@ -228,7 +228,7 @@ struct kvmppc_ops { void (*fast_vcpu_kick)(struct kvm_vcpu *vcpu); long (*arch_vm_ioctl)(struct file *filp, unsigned int ioctl, unsigned long arg); - + int (*hcall_implemented)(unsigned long hcall); }; extern struct kvmppc_ops *kvmppc_hv_ops; diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c index 90aa5c7..bd75902 100644 --- a/arch/powerpc/kvm/book3s.c +++ b/arch/powerpc/kvm/book3s.c @@ -925,6 +925,11 @@ int kvmppc_core_check_processor_compat(void) return 0; } +int kvmppc_book3s_hcall_implemented(struct kvm *kvm, unsigned long hcall) +{ + return kvm->arch.kvm_ops->hcall_implemented(hcall); +} + static int kvmppc_book3s_init(void) { int r; diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c index cf445d2..c4377c7 100644 --- a/arch/powerpc/kvm/book3s_hv.c +++ b/arch/powerpc/kvm/book3s_hv.c @@ -645,6 +645,28 @@ int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu) return RESUME_GUEST; } +static int kvmppc_hcall_impl_hv(unsigned long cmd) +{ + switch (cmd) { + case H_CEDE: + case H_PROD: + case H_CONFER: + case H_REGISTER_VPA: +#ifdef CONFIG_KVM_XICS + case H_XIRR: + case H_CPPR: + case H_EOI: + case H_IPI: + case H_IPOLL: + case H_XIRR_X: +#endif + return 1; + } + + /* See if it's in the real-mode table */ + return kvmppc_hcall_impl_hv_realmode(cmd); +} + static int kvmppc_handle_exit_hv(struct kvm_run *run, struct kvm_vcpu *vcpu, struct task_struct *tsk) { @@ -2451,9 +2473,13 @@ static unsigned int default_hcall_list[] = { static void init_default_hcalls(void) { int i; + unsigned int hcall; - for (i = 0; default_hcall_list[i]; ++i) - __set_bit(default_hcall_list[i] / 4, default_enabled_hcalls); + for (i = 0; default_hcall_list[i]; ++i) { + hcall = default_hcall_list[i]; + WARN_ON(!kvmppc_hcall_impl_hv(hcall)); + __set_bit(hcall / 4, default_enabled_hcalls); + } } static struct kvmppc_ops kvm_ops_hv = { @@ -2488,6 +2514,7 @@ static struct kvmppc_ops kvm_ops_hv = { .emulate_mfspr = kvmppc_core_emulate_mfspr_hv, .fast_vcpu_kick = kvmppc_fast_vcpu_kick_hv, .arch_vm_ioctl = kvm_arch_vm_ioctl_hv, + .hcall_implemented = kvmppc_hcall_impl_hv, }; static int kvmppc_book3s_init_hv(void) diff --git a/arch/powerpc/kvm/book3s_hv_builtin.c b/arch/powerpc/kvm/book3s_hv_builtin.c index 7cde8a6..3b41447 100644 --- a/arch/powerpc/kvm/book3s_hv_builtin.c +++ b/arch/powerpc/kvm/book3s_hv_builtin.c @@ -212,3 +212,16 @@ bool kvm_hv_mode_active(void) { return atomic_read(&hv_vm_count) != 0; } + +extern int hcall_real_table[], hcall_real_table_end[]; + +int kvmppc_hcall_impl_hv_realmode(unsigned long cmd) +{ + cmd /= 4; + if (cmd < hcall_real_table_end - hcall_real_table && + hcall_real_table[cmd]) + return 1; + + return 0; +} +EXPORT_SYMBOL_GPL(kvmppc_hcall_impl_hv_realmode); diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S b/arch/powerpc/kvm/book3s_hv_rmhandlers.S index 33aaade..e66c1e38 100644 --- a/arch/powerpc/kvm/book3s_hv_rmhandlers.S +++ b/arch/powerpc/kvm/book3s_hv_rmhandlers.S @@ -2042,6 +2042,7 @@ hcall_real_table: .long 0 /* 0x12c */ .long 0 /* 0x130 */ .long DOTSYM(kvmppc_h_set_xdabr) - hcall_real_table + .globl hcall_real_table_end hcall_real_table_end: ignore_hdec: diff --git a/arch/powerpc/kvm/book3s_pr.c b/arch/powerpc/kvm/book3s_pr.c index 123ac7d..15fd6c2 100644 --- a/arch/powerpc/kvm/book3s_pr.c +++ b/arch/powerpc/kvm/book3s_pr.c @@ -1670,6 +1670,9 @@ static struct kvmppc_ops kvm_ops_pr = { .emulate_mfspr = kvmppc_core_emulate_mfspr_pr, .fast_vcpu_kick = kvm_vcpu_kick, .arch_vm_ioctl = kvm_arch_vm_ioctl_pr, +#ifdef CONFIG_PPC_BOOK3S_64 + .hcall_implemented = kvmppc_hcall_impl_pr, +#endif }; diff --git a/arch/powerpc/kvm/book3s_pr_papr.c b/arch/powerpc/kvm/book3s_pr_papr.c index eacaa6e..6d0143f 100644 --- a/arch/powerpc/kvm/book3s_pr_papr.c +++ b/arch/powerpc/kvm/book3s_pr_papr.c @@ -309,6 +309,27 @@ int kvmppc_h_pr(struct kvm_vcpu *vcpu, unsigned long cmd) return EMULATE_FAIL; } +int kvmppc_hcall_impl_pr(unsigned long cmd) +{ + switch (cmd) { + case H_ENTER: + case H_REMOVE: + case H_PROTECT: + case H_BULK_REMOVE: + case H_PUT_TCE: + case H_CEDE: +#ifdef CONFIG_KVM_XICS + case H_XIRR: + case H_CPPR: + case H_EOI: + case H_IPI: + case H_IPOLL: + case H_XIRR_X: +#endif + return 1; + } + return 0; +} /* * List of hcall numbers to enable by default. @@ -337,7 +358,11 @@ static unsigned int default_hcall_list[] = { void kvmppc_pr_init_default_hcalls(struct kvm *kvm) { int i; + unsigned int hcall; - for (i = 0; default_hcall_list[i]; ++i) - __set_bit(default_hcall_list[i] / 4, kvm->arch.enabled_hcalls); + for (i = 0; default_hcall_list[i]; ++i) { + hcall = default_hcall_list[i]; + WARN_ON(!kvmppc_hcall_impl_pr(hcall)); + __set_bit(hcall / 4, kvm->arch.enabled_hcalls); + } } diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c index 3222a4d..7efc2b7 100644 --- a/arch/powerpc/kvm/powerpc.c +++ b/arch/powerpc/kvm/powerpc.c @@ -1119,6 +1119,8 @@ static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, if (hcall > MAX_HCALL_OPCODE || (hcall & 3) || cap->args[1] > 1) break; + if (!kvmppc_book3s_hcall_implemented(kvm, hcall)) + break; if (cap->args[1]) set_bit(hcall / 4, kvm->arch.enabled_hcalls); else |