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Message-Id: <20200207124403.363235229@linutronix.de>
Date: Fri, 07 Feb 2020 13:38:58 +0100
From: Thomas Gleixner <tglx@...utronix.de>
To: LKML <linux-kernel@...r.kernel.org>
Cc: x86@...nel.org, John Stultz <john.stultz@...aro.org>,
Vincenzo Frascino <vincenzo.frascino@....com>,
Andy Lutomirski <luto@...nel.org>,
Christophe Leroy <christophe.leroy@....fr>,
Paolo Bonzini <pbonzini@...hat.com>,
Juergen Gross <jgross@...e.com>,
Michael Kelley <mikelley@...rosoft.com>,
Sasha Levin <sashal@...nel.org>,
Ralf Baechle <ralf@...ux-mips.org>,
Paul Burton <paulburton@...nel.org>,
James Hogan <jhogan@...nel.org>,
Russell King <linux@...linux.org.uk>,
Catalin Marinas <catalin.marinas@....com>,
Will Deacon <will@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Marc Zyngier <maz@...nel.org>, Andrei Vagin <avagin@...il.com>
Subject: [patch V2 11/17] ARM/arm64: vdso: Use common vdso clock mode storage
From: Thomas Gleixner <tglx@...utronix.de>
Convert ARM/ARM64 to the generic VDSO clock mode storage. This needs to
happen in one go as they share the clocksource driver.
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
arch/arm/Kconfig | 1 -
arch/arm/include/asm/clocksource.h | 5 ++---
arch/arm/include/asm/vdso/vsyscall.h | 21 ---------------------
arch/arm/mm/Kconfig | 1 +
arch/arm64/Kconfig | 2 +-
arch/arm64/include/asm/clocksource.h | 5 ++---
arch/arm64/include/asm/vdso/vsyscall.h | 9 ---------
drivers/clocksource/arm_arch_timer.c | 8 ++++----
8 files changed, 10 insertions(+), 42 deletions(-)
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -3,7 +3,6 @@ config ARM
bool
default y
select ARCH_32BIT_OFF_T
- select ARCH_CLOCKSOURCE_DATA
select ARCH_HAS_BINFMT_FLAT
select ARCH_HAS_DEBUG_VIRTUAL if MMU
select ARCH_HAS_DEVMEM_IS_ALLOWED
--- a/arch/arm/include/asm/clocksource.h
+++ b/arch/arm/include/asm/clocksource.h
@@ -1,8 +1,7 @@
#ifndef _ASM_CLOCKSOURCE_H
#define _ASM_CLOCKSOURCE_H
-struct arch_clocksource_data {
- bool vdso_direct; /* Usable for direct VDSO access? */
-};
+#define VDSO_ARCH_CLOCKMODES \
+ VDSO_CLOCKMODE_ARCHTIMER
#endif
--- a/arch/arm/include/asm/vdso/vsyscall.h
+++ b/arch/arm/include/asm/vdso/vsyscall.h
@@ -11,18 +11,6 @@
extern struct vdso_data *vdso_data;
extern bool cntvct_ok;
-static __always_inline
-bool tk_is_cntvct(const struct timekeeper *tk)
-{
- if (!IS_ENABLED(CONFIG_ARM_ARCH_TIMER))
- return false;
-
- if (!tk->tkr_mono.clock->archdata.vdso_direct)
- return false;
-
- return true;
-}
-
/*
* Update the vDSO data page to keep in sync with kernel timekeeping.
*/
@@ -41,15 +29,6 @@ bool __arm_update_vdso_data(void)
#define __arch_update_vdso_data __arm_update_vdso_data
static __always_inline
-int __arm_get_clock_mode(struct timekeeper *tk)
-{
- u32 __tk_is_cntvct = tk_is_cntvct(tk);
-
- return __tk_is_cntvct;
-}
-#define __arch_get_clock_mode __arm_get_clock_mode
-
-static __always_inline
void __arm_sync_vdso_data(struct vdso_data *vdata)
{
flush_dcache_page(virt_to_page(vdata));
--- a/arch/arm/mm/Kconfig
+++ b/arch/arm/mm/Kconfig
@@ -900,6 +900,7 @@ config VDSO
select GENERIC_TIME_VSYSCALL
select GENERIC_VDSO_32
select GENERIC_GETTIMEOFDAY
+ select GENERIC_VDSO_CLOCK_MODE
help
Place in the process address space an ELF shared object
providing fast implementations of gettimeofday and
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -9,7 +9,6 @@ config ARM64
select ACPI_MCFG if (ACPI && PCI)
select ACPI_SPCR_TABLE if ACPI
select ACPI_PPTT if ACPI
- select ARCH_CLOCKSOURCE_DATA
select ARCH_HAS_DEBUG_VIRTUAL
select ARCH_HAS_DEVMEM_IS_ALLOWED
select ARCH_HAS_DMA_PREP_COHERENT
@@ -110,6 +109,7 @@ config ARM64
select GENERIC_STRNLEN_USER
select GENERIC_TIME_VSYSCALL
select GENERIC_GETTIMEOFDAY
+ select GENERIC_VDSO_CLOCK_MODE
select HANDLE_DOMAIN_IRQ
select HARDIRQS_SW_RESEND
select HAVE_PCI
--- a/arch/arm64/include/asm/clocksource.h
+++ b/arch/arm64/include/asm/clocksource.h
@@ -2,8 +2,7 @@
#ifndef _ASM_CLOCKSOURCE_H
#define _ASM_CLOCKSOURCE_H
-struct arch_clocksource_data {
- bool vdso_direct; /* Usable for direct VDSO access? */
-};
+#define VDSO_ARCH_CLOCKMODES \
+ VDSO_CLOCKMODE_ARCHTIMER
#endif
--- a/arch/arm64/include/asm/vdso/vsyscall.h
+++ b/arch/arm64/include/asm/vdso/vsyscall.h
@@ -22,15 +22,6 @@ struct vdso_data *__arm64_get_k_vdso_dat
#define __arch_get_k_vdso_data __arm64_get_k_vdso_data
static __always_inline
-int __arm64_get_clock_mode(struct timekeeper *tk)
-{
- u32 use_syscall = !tk->tkr_mono.clock->archdata.vdso_direct;
-
- return use_syscall;
-}
-#define __arch_get_clock_mode __arm64_get_clock_mode
-
-static __always_inline
void __arm64_update_vsyscall(struct vdso_data *vdata, struct timekeeper *tk)
{
vdata[CS_HRES_COARSE].mask = VDSO_PRECISION_MASK;
--- a/drivers/clocksource/arm_arch_timer.c
+++ b/drivers/clocksource/arm_arch_timer.c
@@ -69,7 +69,7 @@ static enum arch_timer_ppi_nr arch_timer
static bool arch_timer_c3stop;
static bool arch_timer_mem_use_virtual;
static bool arch_counter_suspend_stop;
-static bool vdso_default = true;
+static enum vdso_clock_mode vdso_default = VDSO_CLOCKMODE_ARCHTIMER;
static cpumask_t evtstrm_available = CPU_MASK_NONE;
static bool evtstrm_enable = IS_ENABLED(CONFIG_ARM_ARCH_TIMER_EVTSTREAM);
@@ -560,8 +560,8 @@ void arch_timer_enable_workaround(const
* change both the default value and the vdso itself.
*/
if (wa->read_cntvct_el0) {
- clocksource_counter.archdata.vdso_direct = false;
- vdso_default = false;
+ clocksource_counter.vdso_clock_mode = VDSO_CLOCKMODE_NONE;
+ vdso_default = VDSO_CLOCKMODE_NONE;
}
}
@@ -979,7 +979,7 @@ static void __init arch_counter_register
}
arch_timer_read_counter = rd;
- clocksource_counter.archdata.vdso_direct = vdso_default;
+ clocksource_counter.vdso_clock_mode = vdso_default;
} else {
arch_timer_read_counter = arch_counter_get_cntvct_mem;
}
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