From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B80F61DE4EF for ; Mon, 15 Sep 2025 20:43:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757969003; cv=none; b=F4gkkCxT3uAmeMhzobX+yWpxPr4oRVdC3jii4bckJyNFt79ptxrL3rtqskFoBJKm8+PoR1BW1/2go3WKlz4tt66ZthZ6Kv0aRsBFtvYR8dv/szb6v0aHELnsaHHtmK5liBWbMQMJHLNx1KW25Zp+wo5BfI7s7XaVCyoeLK21X7I= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757969003; c=relaxed/simple; bh=NqRAt4gI9f72mLXjY+kqXbLbYla/p/cdspWGOn4s0xg=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=hTIP7pWpMXNRQhTQkl9Rt1DZU1e7umIF60WCJIBSYe9wP5xVtpn0MI6ru5TcBG2rXew25bT/MhJbtDIBQH38+900DO+Uwu7X/ZWa43i4sRKWRDCi4OSoAYpBZ0gEP3vlffy2ft8yeJMl64DYOiTmE8DkE1xAbR617iJVrLgmpbw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Ypwdwx/C; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Ypwdwx/C" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D7F46C4CEF1; Mon, 15 Sep 2025 20:43:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1757969003; bh=NqRAt4gI9f72mLXjY+kqXbLbYla/p/cdspWGOn4s0xg=; h=From:To:Cc:Subject:Date:From; b=Ypwdwx/C7PQCfKuWRU/pvxWD7fBkRsSmxwg5cMFoEup0Mv7KYgMlhNAtqtp+59vfS u7mgR8YxAUttrDUltmW8+QgMUau2yvC77PPZ2qItP3b0bzyRGJTaE9otTSfePh6JkS 2mkit1YkENg6hZ4Ou9tRroaI+ILRPk25veHTpaxzO6U7ZrENBaHEocavyc+OhENeWT SdidzcmlLPiQDDZPmJZ/ozg8uArA29HqiaAfiDsBNSYnM0mP8olQZHx2QU/vr0eZZF XytNbmeEQ+YwBG8sjUbrN8kKYkAFtumargYQ2AD2SuGFUoUpiziVhxK+f5Y+FwHITp H45qUBdHxs9xQ== From: "Mario Limonciello (AMD)" To: "Rafael J . Wysocki" , linux-acpi@vger.kernel.org Cc: "Mario Limonciello (AMD)" Subject: [PATCH 0/2] Add ACPI C4 support Date: Mon, 15 Sep 2025 15:43:15 -0500 Message-ID: <20250915204318.696058-1-superm1@kernel.org> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Some AMD systems have introduced support for ACPI C4. Systems that support ACPI C4 will enter CPU OFF at ACPI C3 and VDD OFF at ACPI C4. VDD OFF is a requirement for s0i3, and thus if C4 isn't supported then a system can't enter s0i3. Add support for ACPI C4 to the processor idle driver, following similar semantics of ACPI C3. Mario Limonciello (AMD) (2): x86/acpi/cstate: Remove open coded check for cpu_feature_enabled() ACPI: processor: Add support for ACPI C4 state arch/x86/kernel/acpi/cstate.c | 2 +- drivers/acpi/processor_idle.c | 10 +++++++--- include/acpi/actypes.h | 5 +++-- 3 files changed, 11 insertions(+), 6 deletions(-) -- 2.43.0