Displaying 6 results from an estimated 6 matches for "a_hi".
2017 Feb 08
2
[PATCH RFC 2/2] x86/vdso: Add VCLOCK_HVCLOCK vDSO clock read method
...lt;linux/kernel.h>
> @@ -141,6 +142,49 @@ static notrace u64 vread_pvclock(int *mode)
> return last;
> }
> #endif
> +#ifdef CONFIG_HYPERV_CLOCK
> +/* (a * b) >> 64 implementation */
> +static inline u64 mul64x64_hi(u64 a, u64 b)
> +{
> + u64 a_lo, a_hi, b_lo, b_hi, p1, p2;
> +
> + a_lo = (u32)a;
> + a_hi = a >> 32;
> + b_lo = (u32)b;
> + b_hi = b >> 32;
> + p1 = a_lo * b_hi;
> + p2 = a_hi * b_lo;
> +
> + return a_hi * b_hi + (p1 >> 32) + (p2 >> 32) +
>...
2017 Feb 08
2
[PATCH RFC 2/2] x86/vdso: Add VCLOCK_HVCLOCK vDSO clock read method
...lt;linux/kernel.h>
> @@ -141,6 +142,49 @@ static notrace u64 vread_pvclock(int *mode)
> return last;
> }
> #endif
> +#ifdef CONFIG_HYPERV_CLOCK
> +/* (a * b) >> 64 implementation */
> +static inline u64 mul64x64_hi(u64 a, u64 b)
> +{
> + u64 a_lo, a_hi, b_lo, b_hi, p1, p2;
> +
> + a_lo = (u32)a;
> + a_hi = a >> 32;
> + b_lo = (u32)b;
> + b_hi = b >> 32;
> + p1 = a_lo * b_hi;
> + p2 = a_hi * b_lo;
> +
> + return a_hi * b_hi + (p1 >> 32) + (p2 >> 32) +
>...
2017 Feb 08
3
[PATCH RFC 0/2] x86/vdso: Add Hyper-V TSC page clocksource support
Hi,
Hyper-V TSC page clocksource is suitable for vDSO, however, the protocol
defined by the hypervisor is different from VCLOCK_PVCLOCK. I implemented
the required support re-using pvclock_page VVAR. Simple sysbench test shows
the following results:
Before:
# time sysbench --test=memory --max-requests=500000 run
...
real 1m22.618s
user 0m50.193s
sys 0m32.268s
After:
# time sysbench
2017 Feb 08
3
[PATCH RFC 0/2] x86/vdso: Add Hyper-V TSC page clocksource support
Hi,
Hyper-V TSC page clocksource is suitable for vDSO, however, the protocol
defined by the hypervisor is different from VCLOCK_PVCLOCK. I implemented
the required support re-using pvclock_page VVAR. Simple sysbench test shows
the following results:
Before:
# time sysbench --test=memory --max-requests=500000 run
...
real 1m22.618s
user 0m50.193s
sys 0m32.268s
After:
# time sysbench
2017 Feb 08
0
[PATCH RFC 2/2] x86/vdso: Add VCLOCK_HVCLOCK vDSO clock read method
...x/math64.h>
#include <linux/time.h>
#include <linux/kernel.h>
@@ -141,6 +142,49 @@ static notrace u64 vread_pvclock(int *mode)
return last;
}
#endif
+#ifdef CONFIG_HYPERV_CLOCK
+/* (a * b) >> 64 implementation */
+static inline u64 mul64x64_hi(u64 a, u64 b)
+{
+ u64 a_lo, a_hi, b_lo, b_hi, p1, p2;
+
+ a_lo = (u32)a;
+ a_hi = a >> 32;
+ b_lo = (u32)b;
+ b_hi = b >> 32;
+ p1 = a_lo * b_hi;
+ p2 = a_hi * b_lo;
+
+ return a_hi * b_hi + (p1 >> 32) + (p2 >> 32) +
+ ((((a_lo * b_lo) >> 32) + (u32)p1 + (u32)p2) >> 32);
+
+}
+
+static notrace...
2014 Aug 17
9
[PATCH 01/10] bios/fan: add support for maxwell's fan management table v2
Re-use the therm-exported fan structure with only two minor modifications:
- pwm_freq: u16 -> u32;
- add fan_type (toggle or PWM)
v2:
- Do not memset the table to 0 as it erases the pre-set default values
Signed-off-by: Martin Peres <martin.peres at free.fr>
---
drm/Kbuild | 1 +
drm/core/include/subdev/bios/fan.h | 1 +
drm/core/subdev/bios/fan.c | 1