linux-kernel - [PATCH] RISC-V: Show CPU ID and Hart ID separately in /proc/cpuinfo

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20180912143822.21948-1-anup@brainfault.org>
Date:   Wed, 12 Sep 2018 20:08:22 +0530
From:   Anup Patel <anup@...infault.org>
To:     Palmer Dabbelt <palmer@...ive.com>,
        Albert Ou <aou@...s.berkeley.edu>
Cc:     Atish Patra <atish.patra@....com>,
        Christoph Hellwig <hch@...radead.org>,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Anup Patel <anup@...infault.org>
Subject: [PATCH] RISC-V: Show CPU ID and Hart ID separately in /proc/cpuinfo

Currently, /proc/cpuinfo show logical CPU ID as Hart ID which
is in-correct. This patch shows CPU ID and Hart ID separately
in /proc/cpuinfo using cpuid_to_hardid_map().

With this patch, contents of /proc/cpuinfo looks as follows:
cpu	: 0
hart	: 1
isa	: rv64imafdcsu
mmu	: sv48

cpu	: 1
hart	: 0
isa	: rv64imafdcsu
mmu	: sv48

cpu	: 2
hart	: 3
isa	: rv64imafdcsu
mmu	: sv48

cpu	: 3
hart	: 2
isa	: rv64imafdcsu
mmu	: sv48

Signed-off-by: Anup Patel <anup@...infault.org>
---
 arch/riscv/kernel/cpu.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/riscv/kernel/cpu.c b/arch/riscv/kernel/cpu.c
index f0f0ec2737b7..7c1342e242e6 100644
--- a/arch/riscv/kernel/cpu.c
+++ b/arch/riscv/kernel/cpu.c
@@ -87,7 +87,8 @@ static int c_show(struct seq_file *m, void *v)
 						   NULL);
 	const char *compat, *isa, *mmu;
 
-	seq_printf(m, "hart\t: %lu\n", cpu_id);
+	seq_printf(m, "cpu\t: %lu\n", cpu_id);
+	seq_printf(m, "hart\t: %lu\n", cpuid_to_hardid_map(cpu_id));
 	if (!of_property_read_string(node, "riscv,isa", &isa)
 	    && isa[0] == 'r'
 	    && isa[1] == 'v')
-- 
2.17.1