iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

cpuidle: riscv-sbi: Fix CPU_PM_CPU_IDLE_ENTER_xyz() macro usage

Browse Source 
Currently, we are using CPU_PM_CPU_IDLE_ENTER_PARAM() for all SBI HSM
suspend types so retentive suspend types are also treated non-retentive
and kernel will do redundant additional work for these states.

The BIT[31] of SBI HSM suspend types allows us to differentiate between
retentive and non-retentive suspend types so we should use this BIT
to call appropriate CPU_PM_CPU_IDLE_ENTER_xyz() macro.

Fixes: 6abf32f1d9c5 ("cpuidle: Add RISC-V SBI CPU idle driver")
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Link: https://lore.kernel.org/r/20220718084553.2056169-1-apatel@ventanamicro.com/
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
This commit is contained in:
Anup Patel 2022-07-18 14:15:53 +05:30 committed by Palmer Dabbelt
parent 096b52fd2b
commit cfadbb9df8
No known key found for this signature in database
GPG Key ID: 2E1319F35FBB1889
1 changed files with 6 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/cpuidle/cpuidle-riscv-sbi.c
View File

@ -97,8 +97,13 @@ static int sbi_cpuidle_enter_state(struct cpuidle_device *dev,
struct cpuidle_driver *drv, int idx)
{
u32 *states = __this_cpu_read(sbi_cpuidle_data.states);
u32 state = states[idx];
return CPU_PM_CPU_IDLE_ENTER_PARAM(sbi_suspend, idx, states[idx]);
if (state & SBI_HSM_SUSP_NON_RET_BIT)
return CPU_PM_CPU_IDLE_ENTER_PARAM(sbi_suspend, idx, state);
else
return CPU_PM_CPU_IDLE_ENTER_RETENTION_PARAM(sbi_suspend,
idx, state);
}
static int __sbi_enter_domain_idle_state(struct cpuidle_device *dev,