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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>
This commit is contained in:
James Hogan 2016-06-23 17:34:40 +01:00 committed by Paolo Bonzini
parent 90e9311a34
commit d7b8f890b6
1 changed files with 25 additions and 0 deletions
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25
arch/mips/kvm/mips.c
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@ -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) struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
{ {
int err, size; 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; vcpu->arch.vcpu_run = p;
p = kvm_mips_build_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 */ /* Invalidate the icache for these ranges */
local_flush_icache_range((unsigned long)gebase, local_flush_icache_range((unsigned long)gebase,
(unsigned long)gebase + ALIGN(size, PAGE_SIZE)); (unsigned long)gebase + ALIGN(size, PAGE_SIZE));