Patch "RISC-V: KVM: Fix the initial sample period value" has been added to the 6.9-stable tree

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



This is a note to let you know that I've just added the patch titled

    RISC-V: KVM: Fix the initial sample period value

to the 6.9-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     risc-v-kvm-fix-the-initial-sample-period-value.patch
and it can be found in the queue-6.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 9361ebd01bd5d9cf88c0acaf1b9cd36f4bb7c77e
Author: Atish Patra <atishp@xxxxxxxxxxxx>
Date:   Sat Apr 20 08:17:26 2024 -0700

    RISC-V: KVM: Fix the initial sample period value
    
    [ Upstream commit 57990ab90ce31aadac0d5a6293f5582e24ff7521 ]
    
    The initial sample period value when counter value is not assigned
    should be set to maximum value supported by the counter width.
    Otherwise, it may result in spurious interrupts.
    
    Reviewed-by: Andrew Jones <ajones@xxxxxxxxxxxxxxxx>
    Signed-off-by: Atish Patra <atishp@xxxxxxxxxxxx>
    Reviewed-by: Anup Patel <anup@xxxxxxxxxxxxxx>
    Link: https://lore.kernel.org/r/20240420151741.962500-11-atishp@xxxxxxxxxxxx
    Signed-off-by: Anup Patel <anup@xxxxxxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/arch/riscv/kvm/vcpu_pmu.c b/arch/riscv/kvm/vcpu_pmu.c
index 86391a5061dda..cee1b9ca4ec48 100644
--- a/arch/riscv/kvm/vcpu_pmu.c
+++ b/arch/riscv/kvm/vcpu_pmu.c
@@ -39,7 +39,7 @@ static u64 kvm_pmu_get_sample_period(struct kvm_pmc *pmc)
 	u64 sample_period;
 
 	if (!pmc->counter_val)
-		sample_period = counter_val_mask + 1;
+		sample_period = counter_val_mask;
 	else
 		sample_period = (-pmc->counter_val) & counter_val_mask;
 




[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Index of Archives]     [Linux USB Devel]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux