Re: [PATCH] kvm: selftests: aarch64: compile with warnings on

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On Thu, May 23, 2019 at 12:05:00PM +0200, Thomas Huth wrote:
> On 23/05/2019 11.40, Andrew Jones wrote:
> > aarch64 fixups needed to compile with warnings as errors.
> > 
> > Signed-off-by: Andrew Jones <drjones@xxxxxxxxxx>
> > ---
> >  tools/testing/selftests/kvm/lib/aarch64/processor.c | 9 +++++----
> >  1 file changed, 5 insertions(+), 4 deletions(-)
> > 
> > diff --git a/tools/testing/selftests/kvm/lib/aarch64/processor.c b/tools/testing/selftests/kvm/lib/aarch64/processor.c
> > index e8c42506a09d..62b381a930ec 100644
> > --- a/tools/testing/selftests/kvm/lib/aarch64/processor.c
> > +++ b/tools/testing/selftests/kvm/lib/aarch64/processor.c
> > @@ -7,6 +7,8 @@
> >  
> >  #define _GNU_SOURCE /* for program_invocation_name */
> >  
> > +#include <linux/compiler.h>
> > +
> >  #include "kvm_util.h"
> >  #include "../kvm_util_internal.h"
> >  #include "processor.h"
> > @@ -67,15 +69,13 @@ static uint64_t ptrs_per_pgd(struct kvm_vm *vm)
> >  	return 1 << (vm->va_bits - shift);
> >  }
> >  
> > -static uint64_t ptrs_per_pte(struct kvm_vm *vm)
> > +static uint64_t __maybe_unused ptrs_per_pte(struct kvm_vm *vm)
> >  {
> >  	return 1 << (vm->page_shift - 3);
> >  }
> 
> You could also wrap the function with "#ifdef DEBUG_VM" ?

I considered that first, but opted to go this way instead because
this helper isn't strictly for debug, which I felt the ifdef would
convey.

> 
> >  void virt_pgd_alloc(struct kvm_vm *vm, uint32_t pgd_memslot)
> >  {
> > -	int rc;
> > -
> >  	if (!vm->pgd_created) {
> >  		vm_paddr_t paddr = vm_phy_pages_alloc(vm,
> >  			page_align(vm, ptrs_per_pgd(vm) * 8) / vm->page_size,
> > @@ -181,6 +181,7 @@ vm_paddr_t addr_gva2gpa(struct kvm_vm *vm, vm_vaddr_t gva)
> >  unmapped_gva:
> >  	TEST_ASSERT(false, "No mapping for vm virtual address, "
> >  		    "gva: 0x%lx", gva);
> > +	return 0;
> 
> I'd rather use exit(1).

That's a good suggestion. I'll send a v2 with this and your r-b.

Thanks,
drew

> 
> >  }
> >  
> >  static void pte_dump(FILE *stream, struct kvm_vm *vm, uint8_t indent, uint64_t page, int level)
> > @@ -312,6 +313,6 @@ void vcpu_dump(FILE *stream, struct kvm_vm *vm, uint32_t vcpuid, uint8_t indent)
> >  	get_reg(vm, vcpuid, ARM64_CORE_REG(regs.pstate), &pstate);
> >  	get_reg(vm, vcpuid, ARM64_CORE_REG(regs.pc), &pc);
> >  
> > -	fprintf(stream, "%*spstate: 0x%.16llx pc: 0x%.16llx\n",
> > +	fprintf(stream, "%*spstate: 0x%.16lx pc: 0x%.16lx\n",
> >  		indent, "", pstate, pc);
> >  }
> > 
> 
> My comments were just suggestions / a matter of taste, so anyway:
> 
> Reviewed-by: Thomas Huth <thuth@xxxxxxxxxx>



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