diff options
| author |   Michael Kelley <mikelley@microsoft.com> | 2021-03-02 13:38:22 -0800 |
|---|---|---|
| committer |   Wei Liu <wei.liu@kernel.org> | 2021-03-08 17:33:00 +0000 |
| commit | ec866be6ec547c9e1cc4451f04250e08b5fe67c7 (patch) | |
| tree | b1567f609b7f45ebd76863706de0eade32ded692 /include/asm-generic/mshyperv.h | |
| parent | clocksource/drivers/hyper-v: Set clocksource rating based on Hyper-V feature (diff) | |
| download | linux-dev-ec866be6ec547c9e1cc4451f04250e08b5fe67c7.tar.xz linux-dev-ec866be6ec547c9e1cc4451f04250e08b5fe67c7.zip | |
clocksource/drivers/hyper-v: Move handling of STIMER0 interrupts
STIMER0 interrupts are most naturally modeled as per-cpu IRQs. But
because x86/x64 doesn't have per-cpu IRQs, the core STIMER0 interrupt
handling machinery is done in code under arch/x86 and Linux IRQs are
not used. Adding support for ARM64 means adding equivalent code
using per-cpu IRQs under arch/arm64.
A better model is to treat per-cpu IRQs as the normal path (which it is
for modern architectures), and the x86/x64 path as the exception. Do this
by incorporating standard Linux per-cpu IRQ allocation into the main
SITMER0 driver code, and bypass it in the x86/x64 exception case. For
x86/x64, special case code is retained under arch/x86, but no STIMER0
interrupt handling code is needed under arch/arm64.
No functional change.
Signed-off-by: Michael Kelley <mikelley@microsoft.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/1614721102-2241-11-git-send-email-mikelley@microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Diffstat (limited to 'include/asm-generic/mshyperv.h')
| -rw-r--r-- | include/asm-generic/mshyperv.h | 5 |
1 files changed, 0 insertions, 5 deletions
diff --git a/include/asm-generic/mshyperv.h b/include/asm-generic/mshyperv.h index 43dc3715a98a..69e7fe0254cf 100644 --- a/include/asm-generic/mshyperv.h +++ b/include/asm-generic/mshyperv.h @@ -183,9 +183,4 @@ static inline bool hv_is_hibernation_supported(void) { return false; } static inline void hyperv_cleanup(void) {} #endif /* CONFIG_HYPERV */ -#if IS_ENABLED(CONFIG_HYPERV) -extern int hv_setup_stimer0_irq(int *irq, int *vector, void (*handler)(void)); -extern void hv_remove_stimer0_irq(int irq); -#endif - #endif |