Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
IronPort-SDR: jGOhXvproomBQ71okRbBAqDkysvNA+CFAhLDNDXVOhYY6Zet3nUXqOCdnHicLM0bu+kLmDTTJM
 rZTW2jeF6zR5+HUPRAJHOBTgFINpQ9WxNcxb8R3clmlVaodPM3W6DxezmEIxIp0RMfB6UHnMYD
 gZUMsQlVdVCxruZqtdYQF8ib7mhbhvuxPp0P/Z7cOjrUXZ3g98rKClIj9v9nkpGbjGKq6TjGxK
 rhsDov7UB0OkrtGpswi76Mk30zR5lTQrs8m8XeKiZSK78Jk7NsEth0vPuHRaChBELQbhaYB1is
 lKo=
IronPort-SDR: NEiPOYofCCVEHI4Z/eu4XoaV++iZExlmdeV5uh4KYJq7KKPqfjVQ2nH+UuqyZRuDfpUPFZIKGh
 ndj8yzqXDSj+K4143TmnIjKDhRHbX27WfR0j1FHnYvoG+T4ob+42XNbQQNCVPj/i+VN7bXFc3o
 85ug5w4mPXjXQPMBAo580gLTvb2UuaSB6qi0dw7W/FAsSk0Y/tm1xMoY+aa54pxVcUNyXEky7M
 aum71H61JXPNeWaHotR5ZoRdqh46Zm4+RMrfEuvneYlyrEpCybdUrN2qp9EKcwplf0njJ4oSU4
 pthk2iCkUGEt83cj79Y9FgQ9
IronPort-SDR: cv3KQs6GxuvQneycJ3ZkjFHK11NakiFw9nfmzS6wDQDhSZDIe3W3g0X12a8FoXYvvENIKo+riC
 UAibA676YcT6Q/0eKCGSqO+6Q1p9c2dT4zUiePdDEcegmiEOcLylyQBlSkrvjKUZOoNeVvFnWo
 Hx6gmDQHn2cf/LGO4IME1AKQUlhm2BItiADXiTFQbvEShOp++lHtfG/Ox6HuNrps/l6QvdKnxH
 K9ZPhRkvfSLyqLxvZYdY/uNMtx+cFoTOYXdTy1WZ4nspNT33yoXxHW34mgn8D/HlbpnduNrsrH
 +U0=
WDCIronportException: Internal
From:   Atish Patra <atish.patra@wdc.com>
To:     linux-kernel@vger.kernel.org
Cc:     Atish Patra <atish.patra@wdc.com>,
        Albert Ou <aou@eecs.berkeley.edu>,
        Anup Patel <anup@brainfault.org>, Borislav Petkov <bp@suse.de>,
        Daniel Lezcano <daniel.lezcano@linaro.org>,
        "Eric W. Biederman" <ebiederm@xmission.com>,
        Geert Uytterhoeven <geert@linux-m68k.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Heiko Carstens <heiko.carstens@de.ibm.com>,
        Jason Cooper <jason@lakedaemon.net>,
        Kees Cook <keescook@chromium.org>,
        linux-riscv@lists.infradead.org, Mao Han <han_mao@c-sky.com>,
        Marc Zyngier <maz@kernel.org>,
        Mike Rapoport <rppt@linux.ibm.com>,
        Nick Hu <nickhu@andestech.com>,
        Palmer Dabbelt <palmer@dabbelt.com>,
        Paul Walmsley <paul.walmsley@sifive.com>,
        "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Vincent Chen <vincent.chen@sifive.com>
Subject: [PATCH v9 09/12] RISC-V: Add SBI HSM extension definitions
Date:   Thu, 20 Feb 2020 16:44:10 -0800
Message-Id: <20200221004413.12869-10-atish.patra@wdc.com>
In-Reply-To: <20200221004413.12869-1-atish.patra@wdc.com>
References: <20200221004413.12869-1-atish.patra@wdc.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

SBI specification defines HSM extension that allows to start/stop a hart
by a supervisor anytime. The specification is available at

https://github.com/riscv/riscv-sbi-doc/blob/master/riscv-sbi.adoc

Add those definitions here.

Signed-off-by: Atish Patra <atish.patra@wdc.com>
---
 arch/riscv/include/asm/sbi.h | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/arch/riscv/include/asm/sbi.h b/arch/riscv/include/asm/sbi.h
index abbf0a7d3b6e..0981a0c97eda 100644
--- a/arch/riscv/include/asm/sbi.h
+++ b/arch/riscv/include/asm/sbi.h
@@ -26,6 +26,7 @@ enum sbi_ext_id {
 	SBI_EXT_TIME = 0x54494D45,
 	SBI_EXT_IPI = 0x735049,
 	SBI_EXT_RFENCE = 0x52464E43,
+	SBI_EXT_HSM = 0x48534D,
 };
 
 enum sbi_ext_base_fid {
@@ -56,6 +57,19 @@ enum sbi_ext_rfence_fid {
 	SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA_ASID,
 };
 
+enum sbi_ext_hsm_fid {
+	SBI_EXT_HSM_HART_START = 0,
+	SBI_EXT_HSM_HART_STOP,
+	SBI_EXT_HSM_HART_STATUS,
+};
+
+enum sbi_hsm_hart_status {
+	SBI_HSM_HART_STATUS_AVAILABLE = 0,
+	SBI_HSM_HART_STATUS_NOT_AVAILABLE,
+	SBI_HSM_HART_STATUS_START_PENDING,
+	SBI_HSM_HART_STATUS_STOP_PENDING,
+};
+
 #define SBI_SPEC_VERSION_DEFAULT	0x1
 #define SBI_SPEC_VERSION_MAJOR_SHIFT	24
 #define SBI_SPEC_VERSION_MAJOR_MASK	0x7f
-- 
2.25.0