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authorLinus Torvalds <torvalds@linux-foundation.org>2017-11-15 10:56:56 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2017-11-15 10:56:56 -0800
commitc9b012e5f4a1d01dfa8abc6318211a67ba7d5db2 (patch)
tree97b2f1c654fc4333e9e3111f76a26ec5503ee5b9 /include/clocksource
parentb293fca43be544483b6488d33ad4b3ed55881064 (diff)
parent6cfa7cc46b1a7a15d81d5389c99cfca633c12b8e (diff)
downloadlinux-stericsson-c9b012e5f4a1d01dfa8abc6318211a67ba7d5db2.tar.gz
Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 updates from Will Deacon: "The big highlight is support for the Scalable Vector Extension (SVE) which required extensive ABI work to ensure we don't break existing applications by blowing away their signal stack with the rather large new vector context (<= 2 kbit per vector register). There's further work to be done optimising things like exception return, but the ABI is solid now. Much of the line count comes from some new PMU drivers we have, but they're pretty self-contained and I suspect we'll have more of them in future. Plenty of acronym soup here: - initial support for the Scalable Vector Extension (SVE) - improved handling for SError interrupts (required to handle RAS events) - enable GCC support for 128-bit integer types - remove kernel text addresses from backtraces and register dumps - use of WFE to implement long delay()s - ACPI IORT updates from Lorenzo Pieralisi - perf PMU driver for the Statistical Profiling Extension (SPE) - perf PMU driver for Hisilicon's system PMUs - misc cleanups and non-critical fixes" * tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (97 commits) arm64: Make ARMV8_DEPRECATED depend on SYSCTL arm64: Implement __lshrti3 library function arm64: support __int128 on gcc 5+ arm64/sve: Add documentation arm64/sve: Detect SVE and activate runtime support arm64/sve: KVM: Hide SVE from CPU features exposed to guests arm64/sve: KVM: Treat guest SVE use as undefined instruction execution arm64/sve: KVM: Prevent guests from using SVE arm64/sve: Add sysctl to set the default vector length for new processes arm64/sve: Add prctl controls for userspace vector length management arm64/sve: ptrace and ELF coredump support arm64/sve: Preserve SVE registers around EFI runtime service calls arm64/sve: Preserve SVE registers around kernel-mode NEON use arm64/sve: Probe SVE capabilities and usable vector lengths arm64: cpufeature: Move sys_caps_initialised declarations arm64/sve: Backend logic for setting the vector length arm64/sve: Signal handling support arm64/sve: Support vector length resetting for new processes arm64/sve: Core task context handling arm64/sve: Low-level CPU setup ...
Diffstat (limited to 'include/clocksource')
-rw-r--r--include/clocksource/arm_arch_timer.h10
1 files changed, 9 insertions, 1 deletions
diff --git a/include/clocksource/arm_arch_timer.h b/include/clocksource/arm_arch_timer.h
index cc805b72994a..349e5957c949 100644
--- a/include/clocksource/arm_arch_timer.h
+++ b/include/clocksource/arm_arch_timer.h
@@ -67,7 +67,9 @@ enum arch_timer_spi_nr {
#define ARCH_TIMER_USR_VT_ACCESS_EN (1 << 8) /* virtual timer registers */
#define ARCH_TIMER_USR_PT_ACCESS_EN (1 << 9) /* physical timer registers */
-#define ARCH_TIMER_EVT_STREAM_FREQ 10000 /* 100us */
+#define ARCH_TIMER_EVT_STREAM_PERIOD_US 100
+#define ARCH_TIMER_EVT_STREAM_FREQ \
+ (USEC_PER_SEC / ARCH_TIMER_EVT_STREAM_PERIOD_US)
struct arch_timer_kvm_info {
struct timecounter timecounter;
@@ -93,6 +95,7 @@ struct arch_timer_mem {
extern u32 arch_timer_get_rate(void);
extern u64 (*arch_timer_read_counter)(void);
extern struct arch_timer_kvm_info *arch_timer_get_kvm_info(void);
+extern bool arch_timer_evtstrm_available(void);
#else
@@ -106,6 +109,11 @@ static inline u64 arch_timer_read_counter(void)
return 0;
}
+static inline bool arch_timer_evtstrm_available(void)
+{
+ return false;
+}
+
#endif
#endif