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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 v4 1/3] powerpc/powernv/idle: Replace CPU features check with PVR check
Date: Tue, 21 Jul 2020 21:07:06 +0530	[thread overview]
Message-ID: <20200721153708.89057-2-psampat@linux.ibm.com> (raw)
In-Reply-To: <20200721153708.89057-1-psampat@linux.ibm.com>

As the idle framework's architecture is incomplete, hence instead of
checking for just the processor type advertised in the device tree CPU
features; check for the Processor Version Register (PVR) so that finer
granularity can be leveraged while making processor checks.

Hence, making the PVR check on the outer level function, subsequently in
the hierarchy keeping the CPU_FTR_ARCH_300 check intact as it is a
faster check to do because of static branches

Signed-off-by: Pratik Rajesh Sampat <psampat@linux.ibm.com>
---
 arch/powerpc/platforms/powernv/idle.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/platforms/powernv/idle.c b/arch/powerpc/platforms/powernv/idle.c
index 2dd467383a88..642abf0b8329 100644
--- a/arch/powerpc/platforms/powernv/idle.c
+++ b/arch/powerpc/platforms/powernv/idle.c
@@ -1205,7 +1205,7 @@ static void __init pnv_probe_idle_states(void)
 		return;
 	}
 
-	if (cpu_has_feature(CPU_FTR_ARCH_300))
+	if (pvr_version_is(PVR_POWER9))
 		pnv_power9_idle_init();
 
 	for (i = 0; i < nr_pnv_idle_states; i++)
-- 
2.25.4


  reply	other threads:[~2020-07-21 15:37 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-21 15:37 [PATCH v4 0/3] powernv/idle: Power9 idle cleanup Pratik Rajesh Sampat
2020-07-21 15:37 ` Pratik Rajesh Sampat [this message]
2020-07-21 15:37 ` [PATCH v4 2/3] powerpc/powernv/idle: Rename pnv_first_spr_loss_level variable Pratik Rajesh Sampat
2020-07-22  4:53   ` Gautham R Shenoy
2020-07-22  4:53     ` Gautham R Shenoy
2020-07-21 15:37 ` [PATCH v4 3/3] powerpc/powernv/idle: Exclude mfspr on HID1,4,5 on P9 and above Pratik Rajesh Sampat
2020-07-21 15:37   ` [PATCH v4 3/3] powerpc/powernv/idle: Exclude mfspr on HID1, 4, 5 " Pratik Rajesh Sampat
2020-07-24 13:25 ` [PATCH v4 0/3] powernv/idle: Power9 idle cleanup Michael Ellerman

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