On Fri, Feb 14, 2020 at 6:59 AM Andrew Jones <drjones@xxxxxxxxxx> wrote: > > [guest_code() can't return, use GUEST_ASSERT(). Ensure the number > of guests pages is compatible with the host.] > Signed-off-by: Andrew Jones <drjones@xxxxxxxxxx> > --- > tools/testing/selftests/kvm/demand_paging_test.c | 11 ++++++++--- > 1 file changed, 8 insertions(+), 3 deletions(-) > > diff --git a/tools/testing/selftests/kvm/demand_paging_test.c b/tools/testing/selftests/kvm/demand_paging_test.c > index ec8860b70129..2e6e3db8418a 100644 > --- a/tools/testing/selftests/kvm/demand_paging_test.c > +++ b/tools/testing/selftests/kvm/demand_paging_test.c > @@ -115,9 +115,8 @@ static void guest_code(uint32_t vcpu_id) > uint64_t pages; > int i; > > - /* Return to signal error if vCPU args data structure is courrupt. */ > - if (vcpu_args[vcpu_id].vcpu_id != vcpu_id) > - return; > + /* Make sure vCPU args data structure is not corrupt. */ > + GUEST_ASSERT(vcpu_args[vcpu_id].vcpu_id == vcpu_id); > > gva = vcpu_args[vcpu_id].gva; > pages = vcpu_args[vcpu_id].pages; > @@ -186,6 +185,12 @@ static struct kvm_vm *create_vm(enum vm_guest_mode mode, int vcpus, > pages += ((2 * vcpus * vcpu_memory_bytes) >> PAGE_SHIFT_4K) / > PTES_PER_4K_PT; > > + /* > + * If the host is uing 64K pages, then we need the number of 4K s/uing/using > + * guest pages to be a multiple of 16. > + */ > + pages += 16 - pages % 16; > + Could we use some derivative of getpagesize() here instead? e.g. ASSERT(getpagesize() >= (1 << PAGE_SHIFT_4K)); ASSERT(!(getpagesize() % (1 << PAGE_SHIFT_4K))); pages_4k_per_host_page = getpagesize() / (1 << PAGE_SHIFT_4K); pages += pages_4k_per_host_page - pages % pages_4k_per_host_page; > vm = _vm_create(mode, pages, O_RDWR); > kvm_vm_elf_load(vm, program_invocation_name, 0, 0); > #ifdef __x86_64__ > -- > 2.21.1 >
