[PATCH 10/11] irqchip/apple-aic: Initialise SYS_APL_VM_TMR_FIQ_ENA_EL1 at boot time
From: Marc Zyngier <maz@kernel.org>
Date: 2021-03-16 17:55:42
Also in:
kvm, kvmarm
Subsystem:
arm/apple machine support, irqchip drivers, the rest · Maintainers:
Sven Peter, Janne Grunau, Thomas Gleixner, Linus Torvalds
Instead of masking the guest timer at the source, take advantage of the SYS_APL_VM_TMR_FIQ_ENA_EL1 register and properly mask the timers at init time. For a good measure, add the missing ISB that synchronises all the previous sysreg accesses. Signed-off-by: Marc Zyngier <maz@kernel.org> --- drivers/irqchip/irq-apple-aic.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/irqchip/irq-apple-aic.c b/drivers/irqchip/irq-apple-aic.c
index 447c9e87f13a..26ee149dbae3 100644
--- a/drivers/irqchip/irq-apple-aic.c
+++ b/drivers/irqchip/irq-apple-aic.c@@ -622,8 +622,8 @@ static int aic_init_cpu(unsigned int cpu) /* Timer FIQs */ sysreg_clear_set(cntp_ctl_el0, 0, ARCH_TIMER_CTRL_IT_MASK); sysreg_clear_set(cntv_ctl_el0, 0, ARCH_TIMER_CTRL_IT_MASK); - sysreg_clear_set_s(SYS_CNTP_CTL_EL02, 0, ARCH_TIMER_CTRL_IT_MASK); - sysreg_clear_set_s(SYS_CNTV_CTL_EL02, 0, ARCH_TIMER_CTRL_IT_MASK); + sysreg_clear_set_s(SYS_APL_VM_TMR_FIQ_ENA_EL1, + VM_TMR_FIQ_ENABLE_V | VM_TMR_FIQ_ENABLE_P, 0); /* PMC FIQ */ sysreg_clear_set_s(SYS_APL_PMCR0_EL1, PMCR0_IMODE | PMCR0_IACT,
@@ -633,6 +633,9 @@ static int aic_init_cpu(unsigned int cpu) sysreg_clear_set_s(SYS_APL_UPMCR0_EL1, UPMCR0_IMODE, FIELD_PREP(UPMCR0_IMODE, UPMCR0_IMODE_OFF)); + /* Commit all of the above */ + isb(); + /* * Make sure the kernel's idea of logical CPU order is the same as AIC's * If we ever end up with a mismatch here, we will have to introduce
--
2.29.2
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