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Mon, 6 Feb 2023 18:54:25 +0000 (UTC) From: Nathan Lynch via B4 Submission Endpoint Date: Mon, 06 Feb 2023 12:54:22 -0600 Subject: [PATCH v2 06/19] powerpc/pseries: drop RTAS-based timebase synchronization MIME-Version: 1.0 Message-Id: <20230125-b4-powerpc-rtas-queue-v2-6-9aa6bd058063@linux.ibm.com> References: <20230125-b4-powerpc-rtas-queue-v2-0-9aa6bd058063@linux.ibm.com> In-Reply-To: <20230125-b4-powerpc-rtas-queue-v2-0-9aa6bd058063@linux.ibm.com> To: Michael Ellerman , Nicholas Piggin , Christophe Leroy , Kajol Jain , Laurent Dufour , Mahesh J Salgaonkar , Andrew Donnellan , Nick Child X-Mailer: b4 0.12.1 X-Developer-Signature: v=1; a=ed25519-sha256; t=1675709663; l=1232; i=nathanl@linux.ibm.com; s=20230206; h=from:subject:message-id; bh=tFcGWQ1AkW6nsQJJK1c3LerD+9XTZywFqC0rfZVIXdk=; b=nF3sLrHRppShxQzSS75GEDBvSu0I3Fqo44gMZOkgyz3+2/m2oyVuox1SMxwVfWkjGYol/p/0b Earyoeg7NRDCI4s8Mhxsi+EdcRwyuVJ4W3DMfICr9nGc6MHXrTOZOF8 X-Developer-Key: i=nathanl@linux.ibm.com; a=ed25519; pk=6daubz/ymoaMF+8voz7UHwnhluEsmDZuqygIIMWpQQY= X-Endpoint-Received: by B4 Submission Endpoint for nathanl@linux.ibm.com/20230206 with auth_id=27 X-Original-From: Nathan Lynch X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: nathanl@linux.ibm.com Cc: Nathan Lynch , linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" From: Nathan Lynch The pseries platform has been LPAR-only for several generations, and the PAPR spec: * Guarantees that timebase synchronization is performed by the platform ("The timebase registers are synchronized by the platform before CPUs are given to the OS" - 7.3.8 SMP Support). * Completely omits the RTAS freeze-time-base and thaw-time-base RTAS functions, which are CHRP artifacts. This code is effectively unused on currently supported models, so drop it. Signed-off-by: Nathan Lynch --- arch/powerpc/platforms/pseries/smp.c | 6 ------ 1 file changed, 6 deletions(-) diff --git a/arch/powerpc/platforms/pseries/smp.c b/arch/powerpc/platforms/pseries/smp.c index fd2174edfa1d..2bcfee86ff87 100644 --- a/arch/powerpc/platforms/pseries/smp.c +++ b/arch/powerpc/platforms/pseries/smp.c @@ -278,11 +278,5 @@ void __init smp_init_pseries(void) cpumask_clear_cpu(boot_cpuid, of_spin_mask); } - /* Non-lpar has additional take/give timebase */ - if (rtas_token("freeze-time-base") != RTAS_UNKNOWN_SERVICE) { - smp_ops->give_timebase = rtas_give_timebase; - smp_ops->take_timebase = rtas_take_timebase; - } - pr_debug(" <- smp_init_pSeries()\n"); }