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KVM: arm64: selftests: Add arch_timer_edge_cases selftest

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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: Ricardo Koller <ricarkol@google.com>
Signed-off-by: Ricardo Koller <ricarkol@google.com>
Signed-off-by: Colton Lewis <coltonlewis@google.com>
Link: https://lore.kernel.org/r/20240823175836.2798235-3-coltonlewis@google.com
Signed-off-by: Marc Zyngier <maz@kernel.org>
This commit is contained in:
Colton Lewis 2024-08-23 17:58:36 +00:00 committed by Marc Zyngier
parent ca1a18368d
commit 54306f5644
3 changed files with 1080 additions and 1 deletions
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1
tools/testing/selftests/kvm/Makefile
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@ -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

1062
tools/testing/selftests/kvm/aarch64/arch_timer_edge_cases.c Normal file
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File diff suppressed because it is too large Load Diff

18
tools/testing/selftests/kvm/include/aarch64/arch_timer.h
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@ -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) {