Commit 54306f56 authored by Colton Lewis's avatar Colton Lewis Committed by Marc Zyngier
Browse files

KVM: arm64: selftests: Add arch_timer_edge_cases selftest 



Add a new arch_timer_edge_cases selftests that validates:

* timers above the max TVAL value
* timers in the past
* moving counters ahead and behind pending timers
* reprograming timers
* timers fired multiple times
* masking/unmasking using the timer control mask

These are intentionally unusual scenarios to stress compliance with
the arm architecture.

Co-developed-by: default avatarRicardo Koller <ricarkol@google.com>
Signed-off-by: default avatarRicardo Koller <ricarkol@google.com>
Signed-off-by: default avatarColton Lewis <coltonlewis@google.com>
Link: https://lore.kernel.org/r/20240823175836.2798235-3-coltonlewis@google.com


Signed-off-by: default avatarMarc Zyngier <maz@kernel.org>
parent ca1a1836

tools/testing/selftests/kvm/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -152,6 +152,7 @@ TEST_GEN_PROGS_x86_64 += pre_fault_memory_test 
TEST_GEN_PROGS_EXTENDED_x86_64 += x86_64/nx_huge_pages_test



TEST_GEN_PROGS_aarch64 += aarch64/aarch32_id_regs

TEST_GEN_PROGS_aarch64 += aarch64/arch_timer_edge_cases

TEST_GEN_PROGS_aarch64 += aarch64/debug-exceptions

TEST_GEN_PROGS_aarch64 += aarch64/hypercalls

TEST_GEN_PROGS_aarch64 += aarch64/page_fault_test

tools/testing/selftests/kvm/aarch64/arch_timer_edge_cases.c

0 → 100644
+1062 −0

File added.

Preview size limit exceeded, changes collapsed.

tools/testing/selftests/kvm/include/aarch64/arch_timer.h

+17 −1
Original line number Diff line number Diff line
@@ -79,7 +79,7 @@ static inline uint64_t timer_get_cval(enum arch_timer timer) 
	return 0;

}



static inline void timer_set_tval(enum arch_timer timer, uint32_t tval)

static inline void timer_set_tval(enum arch_timer timer, int32_t tval)

{

	switch (timer) {

	case VIRTUAL:
@@ -95,6 +95,22 @@ static inline void timer_set_tval(enum arch_timer timer, uint32_t tval) 
	isb();

}



static inline int32_t timer_get_tval(enum arch_timer timer)

{

	isb();

	switch (timer) {

	case VIRTUAL:

		return read_sysreg(cntv_tval_el0);

	case PHYSICAL:

		return read_sysreg(cntp_tval_el0);

	default:

		GUEST_FAIL("Could not get timer %d\n", timer);

	}



	/* We should not reach here */

	return 0;

}



static inline void timer_set_ctl(enum arch_timer timer, uint32_t ctl)

{

	switch (timer) {