From: Yanan Wang <wangyanan55@huawei.com>
To: <kvm@vger.kernel.org>, <linux-kselftest@vger.kernel.org>,
<linux-kernel@vger.kernel.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>,
Ben Gardon <bgardon@google.com>,
"Sean Christopherson" <seanjc@google.com>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
Andrew Jones <drjones@redhat.com>, Peter Xu <peterx@redhat.com>,
Marc Zyngier <maz@kernel.org>, Ingo Molnar <mingo@kernel.org>,
Adrian Hunter <adrian.hunter@intel.com>,
Jiri Olsa <jolsa@redhat.com>,
"Arnaldo Carvalho de Melo" <acme@redhat.com>,
Arnd Bergmann <arnd@arndb.de>,
Michael Kerrisk <mtk.manpages@gmail.com>,
Thomas Gleixner <tglx@linutronix.de>,
<wanghaibin.wang@huawei.com>, <yezengruan@huawei.com>,
<yuzenghui@huawei.com>, Yanan Wang <wangyanan55@huawei.com>
Subject: [RFC PATCH v4 4/9] KVM: selftests: Make a generic helper to get vm guest mode strings
Date: Tue, 2 Mar 2021 20:57:46 +0800 [thread overview]
Message-ID: <20210302125751.19080-5-wangyanan55@huawei.com> (raw)
In-Reply-To: <20210302125751.19080-1-wangyanan55@huawei.com>
For generality and conciseness, make an API which can be used in all
kvm libs and selftests to get vm guest mode strings. And the index i
is checked in the API in case of possiable faults.
Suggested-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Yanan Wang <wangyanan55@huawei.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Ben Gardon <bgardon@google.com>
---
.../testing/selftests/kvm/include/kvm_util.h | 4 +--
tools/testing/selftests/kvm/lib/kvm_util.c | 29 ++++++++++++-------
2 files changed, 19 insertions(+), 14 deletions(-)
diff --git a/tools/testing/selftests/kvm/include/kvm_util.h b/tools/testing/selftests/kvm/include/kvm_util.h
index 2d7eb6989e83..f52a7492f47f 100644
--- a/tools/testing/selftests/kvm/include/kvm_util.h
+++ b/tools/testing/selftests/kvm/include/kvm_util.h
@@ -68,9 +68,6 @@ enum vm_guest_mode {
#define MIN_PAGE_SIZE (1U << MIN_PAGE_SHIFT)
#define PTES_PER_MIN_PAGE ptes_per_page(MIN_PAGE_SIZE)
-#define vm_guest_mode_string(m) vm_guest_mode_string[m]
-extern const char * const vm_guest_mode_string[];
-
struct vm_guest_mode_params {
unsigned int pa_bits;
unsigned int va_bits;
@@ -84,6 +81,7 @@ int vm_enable_cap(struct kvm_vm *vm, struct kvm_enable_cap *cap);
int vcpu_enable_cap(struct kvm_vm *vm, uint32_t vcpu_id,
struct kvm_enable_cap *cap);
void vm_enable_dirty_ring(struct kvm_vm *vm, uint32_t ring_size);
+const char *vm_guest_mode_string(uint32_t i);
struct kvm_vm *vm_create(enum vm_guest_mode mode, uint64_t phy_pages, int perm);
void kvm_vm_free(struct kvm_vm *vmp);
diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
index d787cb802b4a..cc22c4ab7d67 100644
--- a/tools/testing/selftests/kvm/lib/kvm_util.c
+++ b/tools/testing/selftests/kvm/lib/kvm_util.c
@@ -141,17 +141,24 @@ static void vm_open(struct kvm_vm *vm, int perm)
"rc: %i errno: %i", vm->fd, errno);
}
-const char * const vm_guest_mode_string[] = {
- "PA-bits:52, VA-bits:48, 4K pages",
- "PA-bits:52, VA-bits:48, 64K pages",
- "PA-bits:48, VA-bits:48, 4K pages",
- "PA-bits:48, VA-bits:48, 64K pages",
- "PA-bits:40, VA-bits:48, 4K pages",
- "PA-bits:40, VA-bits:48, 64K pages",
- "PA-bits:ANY, VA-bits:48, 4K pages",
-};
-_Static_assert(sizeof(vm_guest_mode_string)/sizeof(char *) == NUM_VM_MODES,
- "Missing new mode strings?");
+const char *vm_guest_mode_string(uint32_t i)
+{
+ static const char * const strings[] = {
+ [VM_MODE_P52V48_4K] = "PA-bits:52, VA-bits:48, 4K pages",
+ [VM_MODE_P52V48_64K] = "PA-bits:52, VA-bits:48, 64K pages",
+ [VM_MODE_P48V48_4K] = "PA-bits:48, VA-bits:48, 4K pages",
+ [VM_MODE_P48V48_64K] = "PA-bits:48, VA-bits:48, 64K pages",
+ [VM_MODE_P40V48_4K] = "PA-bits:40, VA-bits:48, 4K pages",
+ [VM_MODE_P40V48_64K] = "PA-bits:40, VA-bits:48, 64K pages",
+ [VM_MODE_PXXV48_4K] = "PA-bits:ANY, VA-bits:48, 4K pages",
+ };
+ _Static_assert(sizeof(strings)/sizeof(char *) == NUM_VM_MODES,
+ "Missing new mode strings?");
+
+ TEST_ASSERT(i < NUM_VM_MODES, "Guest mode ID %d too big", i);
+
+ return strings[i];
+}
const struct vm_guest_mode_params vm_guest_mode_params[] = {
{ 52, 48, 0x1000, 12 },
--
2.23.0
next prev parent reply other threads:[~2021-03-02 15:47 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-02 12:57 [RFC PATCH v4 0/9] KVM: selftests: some improvement and a new test for kvm page table Yanan Wang
2021-03-02 12:57 ` [RFC PATCH v4 1/9] tools headers: sync headers of asm-generic/hugetlb_encode.h Yanan Wang
2021-03-02 12:57 ` [RFC PATCH v4 2/9] tools headers: Add a macro to get HUGETLB page sizes for mmap Yanan Wang
2021-03-12 11:14 ` Andrew Jones
2021-03-15 2:06 ` wangyanan (Y)
2021-03-02 12:57 ` [RFC PATCH v4 3/9] KVM: selftests: Use flag CLOCK_MONOTONIC_RAW for timing Yanan Wang
2021-03-12 11:17 ` Andrew Jones
2021-03-02 12:57 ` Yanan Wang [this message]
2021-03-02 12:57 ` [RFC PATCH v4 5/9] KVM: selftests: Add a helper to get system configured THP page size Yanan Wang
2021-03-12 11:31 ` Andrew Jones
2021-03-22 6:42 ` wangyanan (Y)
2021-03-02 12:57 ` [RFC PATCH v4 6/9] KVM: selftests: Add a helper to get system default hugetlb " Yanan Wang
2021-03-12 11:40 ` Andrew Jones
2021-03-22 6:45 ` wangyanan (Y)
2021-03-02 12:57 ` [RFC PATCH v4 7/9] KVM: selftests: List all hugetlb src types specified with page sizes Yanan Wang
2021-03-12 11:49 ` Andrew Jones
2021-03-22 7:22 ` wangyanan (Y)
2021-03-12 12:02 ` Andrew Jones
2021-03-22 7:23 ` wangyanan (Y)
2021-03-02 12:57 ` [RFC PATCH v4 8/9] KVM: selftests: Adapt vm_userspace_mem_region_add to new helpers Yanan Wang
2021-03-12 11:52 ` Andrew Jones
2021-03-02 12:57 ` [RFC PATCH v4 9/9] KVM: selftests: Add a test for kvm page table code Yanan Wang
2021-03-12 14:20 ` Andrew Jones
2021-03-22 11:59 ` wangyanan (Y)
2021-03-12 5:03 ` [RFC PATCH v4 0/9] KVM: selftests: some improvement and a new test for kvm page table wangyanan (Y)
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