linux-kernel - [PATCH RFC 06/19] RISC-V: QoS: define CBQRI resctrl resources and domains

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Message-Id: <20260119-ssqosid-cbqri-v1-6-aa2a75153832@kernel.org>
Date: Mon, 19 Jan 2026 20:14:43 -0800
From: Drew Fustini <fustini@...nel.org>
To: Paul Walmsley <pjw@...nel.org>, Palmer Dabbelt <palmer@...belt.com>, 
 Albert Ou <aou@...s.berkeley.edu>, Alexandre Ghiti <alex@...ti.fr>, 
 Radim Krčmář <rkrcmar@...tanamicro.com>, 
 Samuel Holland <samuel.holland@...ive.com>, 
 Adrien Ricciardi <aricciardi@...libre.com>, 
 Nicolas Pitre <npitre@...libre.com>, 
 Kornel Dulęba <mindal@...ihalf.com>, 
 Atish Patra <atish.patra@...ux.dev>, 
 Atish Kumar Patra <atishp@...osinc.com>, 
 Vasudevan Srinivasan <vasu@...osinc.com>, Ved Shanbhogue <ved@...osinc.com>, 
 yunhui cui <cuiyunhui@...edance.com>, Chen Pei <cp0613@...ux.alibaba.com>, 
 Liu Zhiwei <zhiwei_liu@...ux.alibaba.com>, Weiwei Li <liwei1518@...il.com>, 
 guo.wenjia23@....com.cn, liu.qingtao2@....com.cn, 
 Conor Dooley <conor+dt@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Rob Herring <robh+dt@...nel.org>, 
 Reinette Chatre <reinette.chatre@...el.com>, 
 Tony Luck <tony.luck@...el.com>, Babu Moger <babu.moger@....com>, 
 Peter Newman <peternewman@...gle.com>, Fenghua Yu <fenghua.yu@...el.com>, 
 James Morse <james.morse@....com>, Ben Horgan <ben.horgan@....com>, 
 Dave Martin <Dave.Martin@....com>, Drew Fustini <fustini@...nel.org>, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-riscv@...ts.infradead.org, x86@...nel.org
Subject: [PATCH RFC 06/19] RISC-V: QoS: define CBQRI resctrl resources and
 domains

Define data structures to encapsulate the resctrl resource
and domain structures.

Co-developed-by: Adrien Ricciardi <aricciardi@...libre.com>
Signed-off-by: Adrien Ricciardi <aricciardi@...libre.com>
[fustini: rebased on riscv/for-next]
Signed-off-by: Drew Fustini <fustini@...nel.org>
---
 arch/riscv/kernel/qos/internal.h | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/arch/riscv/kernel/qos/internal.h b/arch/riscv/kernel/qos/internal.h
index ff2c7eff50be..c0402dd06cfa 100644
--- a/arch/riscv/kernel/qos/internal.h
+++ b/arch/riscv/kernel/qos/internal.h
@@ -65,6 +65,11 @@
 #define CBQRI_BC_ALLOC_CTL_OP_READ_LIMIT   2
 #define CBQRI_BC_ALLOC_CTL_STATUS_SUCCESS  1
 
+int qos_resctrl_setup(void);
+void qos_resctrl_exit(void);
+int qos_resctrl_online_cpu(unsigned int cpu);
+int qos_resctrl_offline_cpu(unsigned int cpu);
+
 /* Capacity Controller hardware capabilities */
 struct riscv_cbqri_capacity_caps {
 	u16 ncblks; /* number of capacity blocks */
@@ -125,4 +130,26 @@ struct cbqri_controller {
 	bool mon_capable;
 };
 
+struct cbqri_resctrl_res {
+	struct rdt_resource     resctrl_res;
+	struct cbqri_controller controller;
+	u32 max_rcid;
+	u32 max_mcid;
+};
+
+struct cbqri_resctrl_dom {
+	struct rdt_domain_hdr       resctrl_dom_hdr;
+	struct rdt_ctrl_domain  resctrl_ctrl_dom;
+	struct rdt_mon_domain   resctrl_mon_dom;
+	u64 cbm;
+	u64 rbwb;
+	u64 *ctrl_val;
+	struct cbqri_controller *hw_ctrl;
+};
+
+struct cbqri_config {
+	u64 cbm; /* capacity block mask */
+	u64 rbwb; /* reserved bandwidth blocks */
+};
+
 #endif /* _ASM_RISCV_QOS_INTERNAL_H */

-- 
2.43.0