Add a test for the vtimer. I've tested on
accel=tcg
accel=kvm,kernel-irqchip=on : on thunderx, seattle, and mustang
accel=kvm,kernel-irqchip=off : on thunderx and mustang
It works everywhere without modification except on mustang. My mustang
seems to have a hardware problem requiring bit 31 of CNTV_CVAL_EL0
to be clear before attempting to enable (setting CNTV_CTL_EL0.ENABLE),
otherwise the VCPU hangs... My mustang's CNTV_CVAL_EL0 also has the
strange issue of not being able to set the upper 8 bits. Well, fixing
hardware is outside my job description, so "oh, well..." If you hit
the same problem, try the hack below, which allows tests to run and
pass for me.
diff --git a/arm/timer.c b/arm/timer.c
index 89f4c9400ab69..18b8c4773c92f 100644
--- a/arm/timer.c
+++ b/arm/timer.c
@@ -73,7 +73,7 @@ static void test_vtimer(void)
report_prefix_push("vtimer-busy-loop");
/* Enable the timer */
- write_sysreg(~0, cntv_cval_el0);
+ write_sysreg(~0 & ~(1<<31), cntv_cval_el0);
isb();
write_sysreg(CNTV_CTL_ENABLE, cntv_ctl_el0);
Alexander Graf (1):
arm64: add vtimer test
Andrew Jones (1):
arm64: timer: check for vtimer interrupt
arm/Makefile.arm64 | 2 +-
arm/timer.c | 134 +++++++++++++++++++++++++++++++++++++++++++++++++++++
arm/unittests.cfg | 6 +++
lib/arm/asm/gic.h | 4 ++
4 files changed, 145 insertions(+), 1 deletion(-)
create mode 100644 arm/timer.c
--
2.9.4
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