UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

arm64: perf: Count EL2 events if the kernel is running in HYP 

When the kernel is running in HYP (with VHE), it is necessary to
include EL2 events if the user requests counting kernel or
hypervisor events.

Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Marc Zyngier 2016-01-25 17:31:13 +00:00
parent 5f05a72aed
commit d98ecdaca2
1 changed files with 5 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
arch/arm64/kernel/perf_event.c
View File

@ -20,6 +20,7 @@
*/
#include <asm/irq_regs.h>
#include <asm/virt.h>
#include <linux/of.h>
#include <linux/perf/arm_pmu.h>
@ -691,9 +692,12 @@ static int armv8pmu_set_event_filter(struct hw_perf_event *event,
if (attr->exclude_idle)
return -EPERM;
if (is_kernel_in_hyp_mode() &&
attr->exclude_kernel != attr->exclude_hv)
return -EINVAL;
if (attr->exclude_user)
config_base |= ARMV8_EXCLUDE_EL0;
if (attr->exclude_kernel)
if (!is_kernel_in_hyp_mode() && attr->exclude_kernel)
config_base |= ARMV8_EXCLUDE_EL1;
if (!attr->exclude_hv)
config_base |= ARMV8_INCLUDE_EL2;