diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/kernel/kvm.c | 11 | ||||
| -rw-r--r-- | arch/powerpc/kernel/kvm_emul.S | 6 |
2 files changed, 16 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/kvm.c b/arch/powerpc/kernel/kvm.c index 04d4b5aa6dca..62bdf2389669 100644 --- a/arch/powerpc/kernel/kvm.c +++ b/arch/powerpc/kernel/kvm.c @@ -665,6 +665,9 @@ static void kvm_check_ins(u32 *inst, u32 features) } } +extern u32 kvm_template_start[]; +extern u32 kvm_template_end[]; + static void kvm_use_magic_page(void) { u32 *p; @@ -692,8 +695,14 @@ static void kvm_use_magic_page(void) */ local_irq_disable(); - for (p = start; p < end; p++) + for (p = start; p < end; p++) { + /* Avoid patching the template code */ + if (p >= kvm_template_start && p < kvm_template_end) { + p = kvm_template_end - 1; + continue; + } kvm_check_ins(p, features); + } local_irq_enable(); diff --git a/arch/powerpc/kernel/kvm_emul.S b/arch/powerpc/kernel/kvm_emul.S index 801058dd74db..e291cf3cf954 100644 --- a/arch/powerpc/kernel/kvm_emul.S +++ b/arch/powerpc/kernel/kvm_emul.S @@ -66,6 +66,9 @@ kvm_hypercall_start: shared->critical == r1 and r2 is always != r1 */ \ STL64(r2, KVM_MAGIC_PAGE + KVM_MAGIC_CRITICAL, 0); +.global kvm_template_start +kvm_template_start: + .global kvm_emulate_mtmsrd kvm_emulate_mtmsrd: @@ -350,3 +353,6 @@ kvm_emulate_mtsrin_orig_ins_offs: .global kvm_emulate_mtsrin_len kvm_emulate_mtsrin_len: .long (kvm_emulate_mtsrin_end - kvm_emulate_mtsrin) / 4 + +.global kvm_template_end +kvm_template_end: |