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Message-Id: <20200123180436.99487-6-bgardon@google.com>
Date: Thu, 23 Jan 2020 10:04:31 -0800
From: Ben Gardon <bgardon@...gle.com>
To: linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
linux-kselftest@...r.kernel.org
Cc: Paolo Bonzini <pbonzini@...hat.com>,
Cannon Matthews <cannonmatthews@...gle.com>,
Peter Xu <peterx@...hat.com>,
Andrew Jones <drjones@...hat.com>,
Peter Shier <pshier@...gle.com>,
Oliver Upton <oupton@...gle.com>,
Ben Gardon <bgardon@...gle.com>
Subject: [PATCH v4 05/10] KVM: selftests: Pass args to vCPU in global vCPU
args struct
In preparation for supporting multiple vCPUs in the demand paging test,
pass arguments to the vCPU in a consolidated global struct instead of
syncing multiple globals.
Signed-off-by: Ben Gardon <bgardon@...gle.com>
---
.../selftests/kvm/demand_paging_test.c | 38 +++++++++++++------
1 file changed, 27 insertions(+), 11 deletions(-)
diff --git a/tools/testing/selftests/kvm/demand_paging_test.c b/tools/testing/selftests/kvm/demand_paging_test.c
index 9d7514e96a639..9e2a5f7dfa140 100644
--- a/tools/testing/selftests/kvm/demand_paging_test.c
+++ b/tools/testing/selftests/kvm/demand_paging_test.c
@@ -42,7 +42,6 @@
*/
static uint64_t host_page_size;
static uint64_t guest_page_size;
-static uint64_t guest_num_pages;
static char *guest_data_prototype;
@@ -59,18 +58,30 @@ static uint64_t guest_test_phys_mem;
*/
static uint64_t guest_test_virt_mem = DEFAULT_GUEST_TEST_MEM;
+struct vcpu_args {
+ uint64_t gva;
+ uint64_t pages;
+
+ /* Only used by the host userspace part of the vCPU thread */
+ int vcpu_id;
+ struct kvm_vm *vm;
+};
+
+static struct vcpu_args vcpu_args;
+
/*
* Continuously write to the first 8 bytes of each page in the demand paging
* memory region.
*/
static void guest_code(void)
{
+ uint64_t gva = vcpu_args.gva;
+ uint64_t pages = vcpu_args.pages;
int i;
- for (i = 0; i < guest_num_pages; i++) {
- uint64_t addr = guest_test_virt_mem;
+ for (i = 0; i < pages; i++) {
+ uint64_t addr = gva + (i * guest_page_size);
- addr += i * guest_page_size;
addr &= ~(host_page_size - 1);
*(uint64_t *)addr = 0x0123456789ABCDEF;
}
@@ -85,15 +96,16 @@ static uint64_t host_num_pages;
static void *vcpu_worker(void *data)
{
int ret;
- struct kvm_vm *vm = data;
+ struct kvm_vm *vm = vcpu_args.vm;
+ int vcpu_id = vcpu_args.vcpu_id;
struct kvm_run *run;
- run = vcpu_state(vm, VCPU_ID);
+ run = vcpu_state(vm, vcpu_id);
/* Let the guest access its memory */
- ret = _vcpu_run(vm, VCPU_ID);
+ ret = _vcpu_run(vm, vcpu_id);
TEST_ASSERT(ret == 0, "vcpu_run failed: %d\n", ret);
- if (get_ucall(vm, VCPU_ID, NULL) != UCALL_SYNC) {
+ if (get_ucall(vm, vcpu_id, NULL) != UCALL_SYNC) {
TEST_ASSERT(false,
"Invalid guest sync status: exit_reason=%s\n",
exit_reason_str(run->exit_reason));
@@ -285,6 +297,7 @@ static void run_test(enum vm_guest_mode mode, bool use_uffd,
pthread_t uffd_handler_thread;
int pipefd[2];
struct kvm_vm *vm;
+ uint64_t guest_num_pages;
int r;
/*
@@ -370,10 +383,13 @@ static void run_test(enum vm_guest_mode mode, bool use_uffd,
/* Export the shared variables to the guest */
sync_global_to_guest(vm, host_page_size);
sync_global_to_guest(vm, guest_page_size);
- sync_global_to_guest(vm, guest_test_virt_mem);
- sync_global_to_guest(vm, guest_num_pages);
- pthread_create(&vcpu_thread, NULL, vcpu_worker, vm);
+ vcpu_args.vm = vm;
+ vcpu_args.vcpu_id = VCPU_ID;
+ vcpu_args.gva = guest_test_virt_mem;
+ vcpu_args.pages = guest_num_pages;
+ sync_global_to_guest(vm, vcpu_args);
+ pthread_create(&vcpu_thread, NULL, vcpu_worker, &vcpu_args);
/* Wait for the vcpu thread to quit */
pthread_join(vcpu_thread, NULL);
--
2.25.0.341.g760bfbb309-goog
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