linux-kernel - [PATCH] x86/sgx: Describe the parameters of sgx_calc_section

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Message-Id: <20230822102853.15078-1-jarkko@kernel.org>
Date:   Tue, 22 Aug 2023 13:28:53 +0300
From:   Jarkko Sakkinen <jarkko@...nel.org>
To:     linux-sgx@...r.kernel.org
Cc:     Jarkko Sakkinen <jarkko@...nel.org>, stable@...r.kernel.org,
        kernel test robot <lkp@...el.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        x86@...nel.org, "H. Peter Anvin" <hpa@...or.com>,
        Jethro Beekman <jethro@...tanix.com>,
        Serge Ayoun <serge.ayoun@...el.com>,
        Sean Christopherson <seanjc@...gle.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH] x86/sgx: Describe the parameters of sgx_calc_section_metric()

Cc: stable@...r.kernel.org # v5.11+
Fixes: e7e0545299d8 ("x86/sgx: Initialize metadata for Enclave Page Cache (EPC) sections")
Reported-by: kernel test robot <lkp@...el.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202308221542.11UpkVfp-lkp@intel.com/
Signed-off-by: Jarkko Sakkinen <jarkko@...nel.org>
---
 arch/x86/kernel/cpu/sgx/main.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/x86/kernel/cpu/sgx/main.c b/arch/x86/kernel/cpu/sgx/main.c
index 166692f2d501..388350b8f5e3 100644
--- a/arch/x86/kernel/cpu/sgx/main.c
+++ b/arch/x86/kernel/cpu/sgx/main.c
@@ -732,6 +732,10 @@ int arch_memory_failure(unsigned long pfn, int flags)
 }
 
 /**
+ * sgx_calc_section_metric() - Calculate an EPC section metric
+ * @low:	low 32-bit word from CPUID:0x12:{2, ...}
+ * @high:	high 32-bit word from CPUID:0x12:{2, ...}
+ *
  * A section metric is concatenated in a way that @low bits 12-31 define the
  * bits 12-31 of the metric and @high bits 0-19 define the bits 32-51 of the
  * metric.
-- 
2.39.2