Update xen specific hypercall invocation to execute cpu specific vmcall instructions.
Suggested-by: Sean Christopherson seanjc@google.com Signed-off-by: Vishal Annapurve vannapurve@google.com --- .../selftests/kvm/x86_64/xen_shinfo_test.c | 64 +++++++------------ .../selftests/kvm/x86_64/xen_vmcall_test.c | 14 ++-- 2 files changed, 34 insertions(+), 44 deletions(-)
diff --git a/tools/testing/selftests/kvm/x86_64/xen_shinfo_test.c b/tools/testing/selftests/kvm/x86_64/xen_shinfo_test.c index 8a5cb800f50e..92ed07f1c772 100644 --- a/tools/testing/selftests/kvm/x86_64/xen_shinfo_test.c +++ b/tools/testing/selftests/kvm/x86_64/xen_shinfo_test.c @@ -145,6 +145,23 @@ static void guest_wait_for_irq(void) guest_saw_irq = false; }
+static unsigned long vmcall_helper(unsigned long reg_a, unsigned long reg_di, + unsigned long reg_si) +{ + unsigned long ret; + + if (is_amd_cpu()) + __asm__ __volatile__ ("vmmcall" : + "=a" (ret) : + "a" (reg_a), "D" (reg_di), "S" (reg_si)); + else + __asm__ __volatile__ ("vmcall" : + "=a" (ret) : + "a" (reg_a), "D" (reg_di), "S" (reg_si)); + + return ret; +} + static void guest_code(void) { struct vcpu_runstate_info *rs = (void *)RUNSTATE_VADDR; @@ -217,12 +234,7 @@ static void guest_code(void) * EVTCHNOP_send hypercall. */ unsigned long rax; struct evtchn_send s = { .port = 127 }; - __asm__ __volatile__ ("vmcall" : - "=a" (rax) : - "a" (__HYPERVISOR_event_channel_op), - "D" (EVTCHNOP_send), - "S" (&s)); - + rax = vmcall_helper(__HYPERVISOR_event_channel_op, EVTCHNOP_send, (unsigned long)&s); GUEST_ASSERT(rax == 0);
guest_wait_for_irq(); @@ -232,12 +244,7 @@ static void guest_code(void) /* Deliver "outbound" event channel to an eventfd which * happens to be one of our own irqfds. */ s.port = 197; - __asm__ __volatile__ ("vmcall" : - "=a" (rax) : - "a" (__HYPERVISOR_event_channel_op), - "D" (EVTCHNOP_send), - "S" (&s)); - + rax = vmcall_helper(__HYPERVISOR_event_channel_op, EVTCHNOP_send, (unsigned long)&s); GUEST_ASSERT(rax == 0);
guest_wait_for_irq(); @@ -245,10 +252,7 @@ static void guest_code(void) GUEST_SYNC(13);
/* Set a timer 100ms in the future. */ - __asm__ __volatile__ ("vmcall" : - "=a" (rax) : - "a" (__HYPERVISOR_set_timer_op), - "D" (rs->state_entry_time + 100000000)); + rax = vmcall_helper(__HYPERVISOR_set_timer_op, (rs->state_entry_time + 100000000), 0); GUEST_ASSERT(rax == 0);
GUEST_SYNC(14); @@ -271,36 +275,21 @@ static void guest_code(void) .timeout = 0, };
- __asm__ __volatile__ ("vmcall" : - "=a" (rax) : - "a" (__HYPERVISOR_sched_op), - "D" (SCHEDOP_poll), - "S" (&p)); - + rax = vmcall_helper(__HYPERVISOR_sched_op, SCHEDOP_poll, (unsigned long)&p); GUEST_ASSERT(rax == 0);
GUEST_SYNC(17);
/* Poll for an unset port and wait for the timeout. */ p.timeout = 100000000; - __asm__ __volatile__ ("vmcall" : - "=a" (rax) : - "a" (__HYPERVISOR_sched_op), - "D" (SCHEDOP_poll), - "S" (&p)); - + rax = vmcall_helper(__HYPERVISOR_sched_op, SCHEDOP_poll, (unsigned long)&p); GUEST_ASSERT(rax == 0);
GUEST_SYNC(18);
/* A timer will wake the masked port we're waiting on, while we poll */ p.timeout = 0; - __asm__ __volatile__ ("vmcall" : - "=a" (rax) : - "a" (__HYPERVISOR_sched_op), - "D" (SCHEDOP_poll), - "S" (&p)); - + rax = vmcall_helper(__HYPERVISOR_sched_op, SCHEDOP_poll, (unsigned long)&p); GUEST_ASSERT(rax == 0);
GUEST_SYNC(19); @@ -309,12 +298,7 @@ static void guest_code(void) * actual interrupt, while we're polling on a different port. */ ports[0]++; p.timeout = 0; - __asm__ __volatile__ ("vmcall" : - "=a" (rax) : - "a" (__HYPERVISOR_sched_op), - "D" (SCHEDOP_poll), - "S" (&p)); - + rax = vmcall_helper(__HYPERVISOR_sched_op, SCHEDOP_poll, (unsigned long)&p); GUEST_ASSERT(rax == 0);
guest_wait_for_irq(); diff --git a/tools/testing/selftests/kvm/x86_64/xen_vmcall_test.c b/tools/testing/selftests/kvm/x86_64/xen_vmcall_test.c index 88914d48c65e..e78f1b5d3af8 100644 --- a/tools/testing/selftests/kvm/x86_64/xen_vmcall_test.c +++ b/tools/testing/selftests/kvm/x86_64/xen_vmcall_test.c @@ -37,10 +37,16 @@ static void guest_code(void) register unsigned long r9 __asm__("r9") = ARGVALUE(6);
/* First a direct invocation of 'vmcall' */ - __asm__ __volatile__("vmcall" : - "=a"(rax) : - "a"(rax), "D"(rdi), "S"(rsi), "d"(rdx), - "r"(r10), "r"(r8), "r"(r9)); + if (is_amd_cpu()) + __asm__ __volatile__("vmmcall" : + "=a"(rax) : + "a"(rax), "D"(rdi), "S"(rsi), "d"(rdx), + "r"(r10), "r"(r8), "r"(r9)); + else + __asm__ __volatile__("vmcall" : + "=a"(rax) : + "a"(rax), "D"(rdi), "S"(rsi), "d"(rdx), + "r"(r10), "r"(r8), "r"(r9)); GUEST_ASSERT(rax == RETVALUE);
/* Fill in the Xen hypercall page */