MIPS: KVM: Add dumping of generated entry code

Dump the generated entry code with pr_debug(), similar to how it is done
in tlbex.c, so it can be more easily debugged.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim KrÄmář <rkrcmar@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/arch/mips/kvm/mips.c b/arch/mips/kvm/mips.c
index e3ae122..9f36dcb 100644 (file)
--- a/arch/mips/kvm/mips.c
+++ b/arch/mips/kvm/mips.c
@@ -245,6 +245,23 @@ void kvm_arch_commit_memory_region(struct kvm *kvm,
        }
 }
 
+static inline void dump_handler(const char *symbol, void *start, void *end)
+{
+       u32 *p;
+
+       pr_debug("LEAF(%s)\n", symbol);
+
+       pr_debug("\t.set push\n");
+       pr_debug("\t.set noreorder\n");
+
+       for (p = start; p < (u32 *)end; ++p)
+               pr_debug("\t.word\t0x%08x\t\t# %p\n", *p, p);
+
+       pr_debug("\t.set\tpop\n");
+
+       pr_debug("\tEND(%s)\n", symbol);
+}
+
 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
 {
        int err, size;
@@ -309,6 +326,14 @@ struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
        vcpu->arch.vcpu_run = p;
        p = kvm_mips_build_vcpu_run(p);
 
+       /* Dump the generated code */
+       pr_debug("#include <asm/asm.h>\n");
+       pr_debug("#include <asm/regdef.h>\n");
+       pr_debug("\n");
+       dump_handler("kvm_vcpu_run", vcpu->arch.vcpu_run, p);
+       dump_handler("kvm_gen_exc", gebase + 0x180, gebase + 0x200);
+       dump_handler("kvm_exit", gebase + 0x2000, vcpu->arch.vcpu_run);
+
        /* Invalidate the icache for these ranges */
        local_flush_icache_range((unsigned long)gebase,
                                (unsigned long)gebase + ALIGN(size, PAGE_SIZE));