[PATCH v2 01/13] KVM: selftests: move vm_phy_pages_alloc() earlier in file

From: Michael Roth <michael.roth@amd.com>
To: <linux-kselftest@vger.kernel.org>
Cc: <kvm@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
	<x86@kernel.org>, Nathan Tempelman <natet@google.com>,
	Marc Orr <marcorr@google.com>,
	"Steve Rutherford" <srutherford@google.com>,
	Sean Christopherson <seanjc@google.com>,
	Mingwei Zhang <mizhang@google.com>,
	Brijesh Singh <brijesh.singh@amd.com>,
	Tom Lendacky <thomas.lendacky@amd.com>,
	Varad Gautam <varad.gautam@suse.com>,
	Shuah Khan <shuah@kernel.org>,
	Vitaly Kuznetsov <vkuznets@redhat.com>,
	"David Woodhouse" <dwmw@amazon.co.uk>,
	Ricardo Koller <ricarkol@google.com>,
	"Jim Mattson" <jmattson@google.com>,
	Joerg Roedel <joro@8bytes.org>,
	"Thomas Gleixner" <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, "Borislav Petkov" <bp@alien8.de>,
	"H . Peter Anvin" <hpa@zytor.com>,
	Krish Sadhukhan <krish.sadhukhan@oracle.com>,
	Peter Gonda <pgonda@google.com>
Subject: [PATCH v2 01/13] KVM: selftests: move vm_phy_pages_alloc() earlier in file
Date: Thu, 16 Dec 2021 11:13:46 -0600	[thread overview]
Message-ID: <20211216171358.61140-2-michael.roth@amd.com> (raw)
In-Reply-To: <20211216171358.61140-1-michael.roth@amd.com>

Subsequent patches will break some of this code out into file-local
helper functions, which will be used by functions like vm_vaddr_alloc(),
which currently are defined earlier in the file, so a forward
declaration would be needed.

Instead, move it earlier in the file, just above vm_vaddr_alloc() and
and friends, which are the main users.

Reviewed-by: Mingwei Zhang <mizhang@google.com>
Signed-off-by: Michael Roth <michael.roth@amd.com>
---
 tools/testing/selftests/kvm/lib/kvm_util.c | 146 ++++++++++-----------
 1 file changed, 73 insertions(+), 73 deletions(-)

diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
index 8f2e0bb1ef96..f0f0250847f3 100644
--- a/tools/testing/selftests/kvm/lib/kvm_util.c
+++ b/tools/testing/selftests/kvm/lib/kvm_util.c
@@ -1153,6 +1153,79 @@ void vm_vcpu_add(struct kvm_vm *vm, uint32_t vcpuid)
 	list_add(&vcpu->list, &vm->vcpus);
 }
 
+/*
+ * Physical Contiguous Page Allocator
+ *
+ * Input Args:
+ *   vm - Virtual Machine
+ *   num - number of pages
+ *   paddr_min - Physical address minimum
+ *   memslot - Memory region to allocate page from
+ *
+ * Output Args: None
+ *
+ * Return:
+ *   Starting physical address
+ *
+ * Within the VM specified by vm, locates a range of available physical
+ * pages at or above paddr_min. If found, the pages are marked as in use
+ * and their base address is returned. A TEST_ASSERT failure occurs if
+ * not enough pages are available at or above paddr_min.
+ */
+vm_paddr_t vm_phy_pages_alloc(struct kvm_vm *vm, size_t num,
+			      vm_paddr_t paddr_min, uint32_t memslot)
+{
+	struct userspace_mem_region *region;
+	sparsebit_idx_t pg, base;
+
+	TEST_ASSERT(num > 0, "Must allocate at least one page");
+
+	TEST_ASSERT((paddr_min % vm->page_size) == 0, "Min physical address "
+		"not divisible by page size.\n"
+		"  paddr_min: 0x%lx page_size: 0x%x",
+		paddr_min, vm->page_size);
+
+	region = memslot2region(vm, memslot);
+	base = pg = paddr_min >> vm->page_shift;
+
+	do {
+		for (; pg < base + num; ++pg) {
+			if (!sparsebit_is_set(region->unused_phy_pages, pg)) {
+				base = pg = sparsebit_next_set(region->unused_phy_pages, pg);
+				break;
+			}
+		}
+	} while (pg && pg != base + num);
+
+	if (pg == 0) {
+		fprintf(stderr, "No guest physical page available, "
+			"paddr_min: 0x%lx page_size: 0x%x memslot: %u\n",
+			paddr_min, vm->page_size, memslot);
+		fputs("---- vm dump ----\n", stderr);
+		vm_dump(stderr, vm, 2);
+		abort();
+	}
+
+	for (pg = base; pg < base + num; ++pg)
+		sparsebit_clear(region->unused_phy_pages, pg);
+
+	return base * vm->page_size;
+}
+
+vm_paddr_t vm_phy_page_alloc(struct kvm_vm *vm, vm_paddr_t paddr_min,
+			     uint32_t memslot)
+{
+	return vm_phy_pages_alloc(vm, 1, paddr_min, memslot);
+}
+
+/* Arbitrary minimum physical address used for virtual translation tables. */
+#define KVM_GUEST_PAGE_TABLE_MIN_PADDR 0x180000
+
+vm_paddr_t vm_alloc_page_table(struct kvm_vm *vm)
+{
+	return vm_phy_page_alloc(vm, KVM_GUEST_PAGE_TABLE_MIN_PADDR, 0);
+}
+
 /*
  * VM Virtual Address Unused Gap
  *
@@ -2195,79 +2268,6 @@ const char *exit_reason_str(unsigned int exit_reason)
 	return "Unknown";
 }
 
-/*
- * Physical Contiguous Page Allocator
- *
- * Input Args:
- *   vm - Virtual Machine
- *   num - number of pages
- *   paddr_min - Physical address minimum
- *   memslot - Memory region to allocate page from
- *
- * Output Args: None
- *
- * Return:
- *   Starting physical address
- *
- * Within the VM specified by vm, locates a range of available physical
- * pages at or above paddr_min. If found, the pages are marked as in use
- * and their base address is returned. A TEST_ASSERT failure occurs if
- * not enough pages are available at or above paddr_min.
- */
-vm_paddr_t vm_phy_pages_alloc(struct kvm_vm *vm, size_t num,
-			      vm_paddr_t paddr_min, uint32_t memslot)
-{
-	struct userspace_mem_region *region;
-	sparsebit_idx_t pg, base;
-
-	TEST_ASSERT(num > 0, "Must allocate at least one page");
-
-	TEST_ASSERT((paddr_min % vm->page_size) == 0, "Min physical address "
-		"not divisible by page size.\n"
-		"  paddr_min: 0x%lx page_size: 0x%x",
-		paddr_min, vm->page_size);
-
-	region = memslot2region(vm, memslot);
-	base = pg = paddr_min >> vm->page_shift;
-
-	do {
-		for (; pg < base + num; ++pg) {
-			if (!sparsebit_is_set(region->unused_phy_pages, pg)) {
-				base = pg = sparsebit_next_set(region->unused_phy_pages, pg);
-				break;
-			}
-		}
-	} while (pg && pg != base + num);
-
-	if (pg == 0) {
-		fprintf(stderr, "No guest physical page available, "
-			"paddr_min: 0x%lx page_size: 0x%x memslot: %u\n",
-			paddr_min, vm->page_size, memslot);
-		fputs("---- vm dump ----\n", stderr);
-		vm_dump(stderr, vm, 2);
-		abort();
-	}
-
-	for (pg = base; pg < base + num; ++pg)
-		sparsebit_clear(region->unused_phy_pages, pg);
-
-	return base * vm->page_size;
-}
-
-vm_paddr_t vm_phy_page_alloc(struct kvm_vm *vm, vm_paddr_t paddr_min,
-			     uint32_t memslot)
-{
-	return vm_phy_pages_alloc(vm, 1, paddr_min, memslot);
-}
-
-/* Arbitrary minimum physical address used for virtual translation tables. */
-#define KVM_GUEST_PAGE_TABLE_MIN_PADDR 0x180000
-
-vm_paddr_t vm_alloc_page_table(struct kvm_vm *vm)
-{
-	return vm_phy_page_alloc(vm, KVM_GUEST_PAGE_TABLE_MIN_PADDR, 0);
-}
-
 /*
  * Address Guest Virtual to Host Virtual
  *
-- 
2.25.1

