linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Pratik Rajesh Sampat <psampat@linux.ibm.com>
To: mpe@ellerman.id.au, npiggin@gmail.com, benh@kernel.crashing.org,
	paulus@samba.org, mikey@neuling.org, ego@linux.vnet.ibm.com,
	svaidy@linux.ibm.com, psampat@linux.ibm.com,
	pratik.r.sampat@gmail.com, linuxppc-dev@lists.ozlabs.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH v3 2/3] powerpc/powernv/idle: Rename pnv_first_spr_loss_level variable
Date: Sat, 18 Jul 2020 00:23:05 +0530	[thread overview]
Message-ID: <20200717185306.60607-3-psampat@linux.ibm.com> (raw)
In-Reply-To: <20200717185306.60607-1-psampat@linux.ibm.com>

Replace the variable name from using "pnv_first_spr_loss_level" to
"pnv_first_fullstate_loss_level".

As pnv_first_spr_loss_level is supposed to be the earliest state that
has OPAL_PM_LOSE_FULL_CONTEXT set, however as shallow states too loose
SPR values, render an incorrect terminology.

Signed-off-by: Pratik Rajesh Sampat <psampat@linux.ibm.com>
---
 arch/powerpc/platforms/powernv/idle.c | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/arch/powerpc/platforms/powernv/idle.c b/arch/powerpc/platforms/powernv/idle.c
index f62904f70fc6..d439e11af101 100644
--- a/arch/powerpc/platforms/powernv/idle.c
+++ b/arch/powerpc/platforms/powernv/idle.c
@@ -48,7 +48,7 @@ static bool default_stop_found;
  * First stop state levels when SPR and TB loss can occur.
  */
 static u64 pnv_first_tb_loss_level = MAX_STOP_STATE + 1;
-static u64 pnv_first_spr_loss_level = MAX_STOP_STATE + 1;
+static u64 pnv_first_fullstate_loss_level = MAX_STOP_STATE + 1;
 
 /*
  * psscr value and mask of the deepest stop idle state.
@@ -657,7 +657,7 @@ static unsigned long power9_idle_stop(unsigned long psscr, bool mmu_on)
 		  */
 		mmcr0		= mfspr(SPRN_MMCR0);
 	}
-	if ((psscr & PSSCR_RL_MASK) >= pnv_first_spr_loss_level) {
+	if ((psscr & PSSCR_RL_MASK) >= pnv_first_fullstate_loss_level) {
 		sprs.lpcr	= mfspr(SPRN_LPCR);
 		sprs.hfscr	= mfspr(SPRN_HFSCR);
 		sprs.fscr	= mfspr(SPRN_FSCR);
@@ -741,7 +741,7 @@ static unsigned long power9_idle_stop(unsigned long psscr, bool mmu_on)
 	 * just always test PSSCR for SPR/TB state loss.
 	 */
 	pls = (psscr & PSSCR_PLS) >> PSSCR_PLS_SHIFT;
-	if (likely(pls < pnv_first_spr_loss_level)) {
+	if (likely(pls < pnv_first_fullstate_loss_level)) {
 		if (sprs_saved)
 			atomic_stop_thread_idle();
 		goto out;
@@ -1088,7 +1088,7 @@ static void __init pnv_power9_idle_init(void)
 	 * the deepest loss-less (OPAL_PM_STOP_INST_FAST) stop state.
 	 */
 	pnv_first_tb_loss_level = MAX_STOP_STATE + 1;
-	pnv_first_spr_loss_level = MAX_STOP_STATE + 1;
+	pnv_first_fullstate_loss_level = MAX_STOP_STATE + 1;
 	for (i = 0; i < nr_pnv_idle_states; i++) {
 		int err;
 		struct pnv_idle_states_t *state = &pnv_idle_states[i];
@@ -1099,8 +1099,8 @@ static void __init pnv_power9_idle_init(void)
 			pnv_first_tb_loss_level = psscr_rl;
 
 		if ((state->flags & OPAL_PM_LOSE_FULL_CONTEXT) &&
-		     (pnv_first_spr_loss_level > psscr_rl))
-			pnv_first_spr_loss_level = psscr_rl;
+		     (pnv_first_fullstate_loss_level > psscr_rl))
+			pnv_first_fullstate_loss_level = psscr_rl;
 
 		/*
 		 * The idle code does not deal with TB loss occurring
@@ -1111,8 +1111,8 @@ static void __init pnv_power9_idle_init(void)
 		 * compatibility.
 		 */
 		if ((state->flags & OPAL_PM_TIMEBASE_STOP) &&
-		     (pnv_first_spr_loss_level > psscr_rl))
-			pnv_first_spr_loss_level = psscr_rl;
+		     (pnv_first_fullstate_loss_level > psscr_rl))
+			pnv_first_fullstate_loss_level = psscr_rl;
 
 		err = validate_psscr_val_mask(&state->psscr_val,
 					      &state->psscr_mask,
@@ -1158,7 +1158,7 @@ static void __init pnv_power9_idle_init(void)
 	}
 
 	pr_info("cpuidle-powernv: First stop level that may lose SPRs = 0x%llx\n",
-		pnv_first_spr_loss_level);
+		pnv_first_fullstate_loss_level);
 
 	pr_info("cpuidle-powernv: First stop level that may lose timebase = 0x%llx\n",
 		pnv_first_tb_loss_level);
-- 
2.25.4


  parent reply	other threads:[~2020-07-17 18:53 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-17 18:53 [PATCH v3 0/3] powernv/idle: Power9 idle cleanup Pratik Rajesh Sampat
2020-07-17 18:53 ` [PATCH v3 1/3] powerpc/powernv/idle: Replace CPU features checks with PVR checks Pratik Rajesh Sampat
2020-07-20  0:00   ` Nicholas Piggin
2020-07-21 10:24     ` Pratik Sampat
2020-07-17 18:53 ` Pratik Rajesh Sampat [this message]
2020-07-19 23:57   ` [PATCH v3 2/3] powerpc/powernv/idle: Rename pnv_first_spr_loss_level variable Nicholas Piggin
2020-07-21 10:29     ` Pratik Sampat
2020-07-21 14:37       ` Nicholas Piggin
2020-07-21 14:55         ` Gautham R Shenoy
2020-07-17 18:53 ` [PATCH v3 3/3] powerpc/powernv/idle: Exclude mfspr on HID1,4,5 on P9 and above Pratik Rajesh Sampat
2020-07-20  0:01   ` Nicholas Piggin

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20200717185306.60607-3-psampat@linux.ibm.com \
    --to=psampat@linux.ibm.com \
    --cc=benh@kernel.crashing.org \
    --cc=ego@linux.vnet.ibm.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linuxppc-dev@lists.ozlabs.org \
    --cc=mikey@neuling.org \
    --cc=mpe@ellerman.id.au \
    --cc=npiggin@gmail.com \
    --cc=paulus@samba.org \
    --cc=pratik.r.sampat@gmail.com \
    --cc=svaidy@linux.ibm.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).