linux-kernel - [PATCH] cpuidle/powernv : init all present cpus for deep states

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Wed, 16 May 2018 17:32:14 +0530
From:   Akshay Adiga <akshay.adiga@...ux.vnet.ibm.com>
To:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Cc:     npiggin@...il.com, mpe@...erman.id.au, ego@...ux.vnet.ibm.com,
        Akshay Adiga <akshay.adiga@...ux.vnet.ibm.com>
Subject: [PATCH] cpuidle/powernv : init all present cpus for deep states

Init all present cpus for deep states instead of "all possible" cpus.
Init fails if the possible cpu is gaurded. Resulting in making only
non-deep states available for cpuidle/hotplug.

Signed-off-by: Akshay Adiga <akshay.adiga@...ux.vnet.ibm.com>
---
 arch/powerpc/platforms/powernv/idle.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/platforms/powernv/idle.c b/arch/powerpc/platforms/powernv/idle.c
index 1f12ab1..1c5d067 100644
--- a/arch/powerpc/platforms/powernv/idle.c
+++ b/arch/powerpc/platforms/powernv/idle.c
@@ -79,7 +79,7 @@ static int pnv_save_sprs_for_deep_states(void)
 	uint64_t msr_val = MSR_IDLE;
 	uint64_t psscr_val = pnv_deepest_stop_psscr_val;
 
-	for_each_possible_cpu(cpu) {
+	for_each_present_cpu(cpu) {
 		uint64_t pir = get_hard_smp_processor_id(cpu);
 		uint64_t hsprg0_val = (uint64_t)paca_ptrs[cpu];
 
@@ -814,7 +814,7 @@ static int __init pnv_init_idle_states(void)
 		int cpu;
 
 		pr_info("powernv: idle: Saving PACA pointers of all CPUs in their thread sibling PACA\n");
-		for_each_possible_cpu(cpu) {
+		for_each_present_cpu(cpu) {
 			int base_cpu = cpu_first_thread_sibling(cpu);
 			int idx = cpu_thread_in_core(cpu);
 			int i;
-- 
2.5.5