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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-10-30 22:36:45 (GMT) |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-10-30 22:36:45 (GMT) |
| commit | 1bc87b00556e8f7ba30a1010471951c5b8f71114 (patch) | |
| tree | e73c2d187e2dff0df97ed82e32b45e362b923117 /arch/powerpc/kvm/book3s_emulate.c | |
| parent | acff987d94cbdb4049f3706bed1f1792f8ef6837 (diff) | |
| parent | f1c1da2bde712812a3e0f9a7a7ebe7a916a4b5f4 (diff) | |
| download | linux-1bc87b00556e8f7ba30a1010471951c5b8f71114.tar.xz | |
Merge branch 'kvm-updates/3.2' of git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm
* 'kvm-updates/3.2' of git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm: (75 commits)
KVM: SVM: Keep intercepting task switching with NPT enabled
KVM: s390: implement sigp external call
KVM: s390: fix register setting
KVM: s390: fix return value of kvm_arch_init_vm
KVM: s390: check cpu_id prior to using it
KVM: emulate lapic tsc deadline timer for guest
x86: TSC deadline definitions
KVM: Fix simultaneous NMIs
KVM: x86 emulator: convert push %sreg/pop %sreg to direct decode
KVM: x86 emulator: switch lds/les/lss/lfs/lgs to direct decode
KVM: x86 emulator: streamline decode of segment registers
KVM: x86 emulator: simplify OpMem64 decode
KVM: x86 emulator: switch src decode to decode_operand()
KVM: x86 emulator: qualify OpReg inhibit_byte_regs hack
KVM: x86 emulator: switch OpImmUByte decode to decode_imm()
KVM: x86 emulator: free up some flag bits near src, dst
KVM: x86 emulator: switch src2 to generic decode_operand()
KVM: x86 emulator: expand decode flags to 64 bits
KVM: x86 emulator: split dst decode to a generic decode_operand()
KVM: x86 emulator: move memop, memopp into emulation context
...
Diffstat (limited to 'arch/powerpc/kvm/book3s_emulate.c')
| -rw-r--r-- | arch/powerpc/kvm/book3s_emulate.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/book3s_emulate.c b/arch/powerpc/kvm/book3s_emulate.c index 4668465..0c9dc62 100644 --- a/arch/powerpc/kvm/book3s_emulate.c +++ b/arch/powerpc/kvm/book3s_emulate.c @@ -63,6 +63,25 @@ * function pointers, so let's just disable the define. */ #undef mfsrin +enum priv_level { + PRIV_PROBLEM = 0, + PRIV_SUPER = 1, + PRIV_HYPER = 2, +}; + +static bool spr_allowed(struct kvm_vcpu *vcpu, enum priv_level level) +{ + /* PAPR VMs only access supervisor SPRs */ + if (vcpu->arch.papr_enabled && (level > PRIV_SUPER)) + return false; + + /* Limit user space to its own small SPR set */ + if ((vcpu->arch.shared->msr & MSR_PR) && level > PRIV_PROBLEM) + return false; + + return true; +} + int kvmppc_core_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu, unsigned int inst, int *advance) { @@ -296,6 +315,8 @@ int kvmppc_core_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, int rs) switch (sprn) { case SPRN_SDR1: + if (!spr_allowed(vcpu, PRIV_HYPER)) + goto unprivileged; to_book3s(vcpu)->sdr1 = spr_val; break; case SPRN_DSISR: @@ -390,6 +411,7 @@ int kvmppc_core_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, int rs) case SPRN_PMC4_GEKKO: case SPRN_WPAR_GEKKO: break; +unprivileged: default: printk(KERN_INFO "KVM: invalid SPR write: %d\n", sprn); #ifndef DEBUG_SPR @@ -421,6 +443,8 @@ int kvmppc_core_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, int rt) break; } case SPRN_SDR1: + if (!spr_allowed(vcpu, PRIV_HYPER)) + goto unprivileged; kvmppc_set_gpr(vcpu, rt, to_book3s(vcpu)->sdr1); break; case SPRN_DSISR: @@ -449,6 +473,10 @@ int kvmppc_core_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, int rt) case SPRN_HID5: kvmppc_set_gpr(vcpu, rt, to_book3s(vcpu)->hid[5]); break; + case SPRN_CFAR: + case SPRN_PURR: + kvmppc_set_gpr(vcpu, rt, 0); + break; case SPRN_GQR0: case SPRN_GQR1: case SPRN_GQR2: @@ -476,6 +504,7 @@ int kvmppc_core_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, int rt) kvmppc_set_gpr(vcpu, rt, 0); break; default: +unprivileged: printk(KERN_INFO "KVM: invalid SPR read: %d\n", sprn); #ifndef DEBUG_SPR emulated = EMULATE_FAIL; |