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tests: check decoding of kvm ioctls related to struct kvm_cpuid2

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* tests/ioctl_kvm_run.c [!HAVE_STRUCT_KVM_CPUID2]: Skip the test.
(KVM_MAX_CPUID_ENTRIES): New macro.
(print_cpuid_ioctl): New function.
(main): Add tests for cpuid related ioctl.

Signed-off-by: Pierre Marsais <pierre.marsais@lse.epita.fr>
This commit is contained in:
Pierre Marsais 2018-06-28 03:37:44 +01:00 committed by Dmitry V. Levin
parent 546181b267
commit 028d869b95
1 changed files with 45 additions and 2 deletions
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47
tests/ioctl_kvm_run.c
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@ -28,6 +28,7 @@
#include "tests.h"
#if defined HAVE_LINUX_KVM_H \
&& defined HAVE_STRUCT_KVM_CPUID2 \
&& defined HAVE_STRUCT_KVM_REGS \
&& defined HAVE_STRUCT_KVM_SREGS \
&& defined HAVE_STRUCT_KVM_USERSPACE_MEMORY_REGION \
@ -43,6 +44,10 @@
# include <unistd.h>
# include <linux/kvm.h>
# ifndef KVM_MAX_CPUID_ENTRIES
# define KVM_MAX_CPUID_ENTRIES 80
# endif
static int
kvm_ioctl(int fd, unsigned long cmd, const char *cmd_str, void *arg)
{
@ -183,6 +188,17 @@ vcpu_dev_should_have_cpuid(int fd)
return r;
}
static void
print_cpuid_ioctl(int fd, const char *fd_dev,
const char *ioctl_name, const struct kvm_cpuid2 *cpuid)
{
printf("ioctl(%d<%s>, %s, {nent=%u, entries=[",
fd, fd_dev, ioctl_name, cpuid->nent);
if (cpuid->nent)
printf("...");
printf("]}) = 0\n");
}
int
main(void)
{
@ -253,6 +269,33 @@ main(void)
if (run == MAP_FAILED)
perror_msg_and_fail("mmap vcpu");
size_t cpuid_nent = KVM_MAX_CPUID_ENTRIES;
struct kvm_cpuid2 *cpuid = tail_alloc(sizeof(*cpuid) +
cpuid_nent *
sizeof(*cpuid->entries));
cpuid->nent = 0;
ioctl(kvm, KVM_GET_SUPPORTED_CPUID, cpuid);
printf("ioctl(%d<%s>, KVM_GET_SUPPORTED_CPUID, %p) = -1 E2BIG (%m)\n",
kvm, dev, cpuid);
cpuid->nent = cpuid_nent;
KVM_IOCTL(kvm, KVM_GET_SUPPORTED_CPUID, cpuid);
print_cpuid_ioctl(kvm, dev, "KVM_GET_SUPPORTED_CPUID", cpuid);
struct kvm_cpuid2 cpuid_tmp = { .nent = 0 };
KVM_IOCTL(vcpu_fd, KVM_SET_CPUID2, &cpuid_tmp);
printf("ioctl(%d<%s>, KVM_SET_CPUID2, {nent=%u, entries=[]}) = 0\n",
vcpu_fd, vcpu_dev, cpuid_tmp.nent);
KVM_IOCTL(vcpu_fd, KVM_SET_CPUID2, cpuid);
print_cpuid_ioctl(vcpu_fd, vcpu_dev, "KVM_SET_CPUID2", cpuid);
ioctl(vcpu_fd, KVM_SET_CPUID2, NULL);
printf("ioctl(%d<%s>, KVM_SET_CPUID2, NULL) = -1 EFAULT (%m)\n",
vcpu_fd, vcpu_dev);
run_kvm(vcpu_fd, run, mmap_size, mem);
puts("+++ exited with 0 +++");
@ -261,8 +304,8 @@ main(void)
#else /* !HAVE_LINUX_KVM_H */
SKIP_MAIN_UNDEFINED("HAVE_LINUX_KVM_H && HAVE_STRUCT_KVM_REGS && "
"HAVE_STRUCT_KVM_SREGS && "
SKIP_MAIN_UNDEFINED("HAVE_LINUX_KVM_H && HAVE_STRUCT_KVM_CPUID2 && "
"HAVE_STRUCT_KVM_REGS && HAVE_STRUCT_KVM_SREGS && "
"HAVE_STRUCT_KVM_USERSPACE_MEMORY_REGION && "
"(__x86_64__ || __i386__)")