From: Paul Burton <paul.burton@imgtec.com> To: <linux-mips@linux-mips.org> Cc: Alexander Viro <viro@zeniv.linux.org.uk>, <linux-fsdevel@vger.kernel.org>, <linux-kernel@vger.kernel.org>, Paul Burton <paul.burton@imgtec.com> Subject: [PATCH 06/10] MIPS: ensure Config5.UFE is clear on boot Date: Thu, 11 Sep 2014 08:30:19 +0100 [thread overview] Message-ID: <1410420623-11691-7-git-send-email-paul.burton@imgtec.com> (raw) In-Reply-To: <1410420623-11691-1-git-send-email-paul.burton@imgtec.com> As is done for UFR, ensure that userland cannot directly manipulate the mode by clearing the UFE bit during boot. Signed-off-by: Paul Burton <paul.burton@imgtec.com> --- arch/mips/kernel/cpu-probe.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c index db929a0..4e2a6e0 100644 --- a/arch/mips/kernel/cpu-probe.c +++ b/arch/mips/kernel/cpu-probe.c @@ -400,7 +400,7 @@ static inline unsigned int decode_config5(struct cpuinfo_mips *c) unsigned int config5; config5 = read_c0_config5(); - config5 &= ~MIPS_CONF5_UFR; + config5 &= ~(MIPS_CONF5_UFR | MIPS_CONF5_UFE); write_c0_config5(config5); if (config5 & MIPS_CONF5_EVA) -- 2.0.4
WARNING: multiple messages have this Message-ID (diff)
From: Paul Burton <paul.burton@imgtec.com> To: linux-mips@linux-mips.org Cc: Alexander Viro <viro@zeniv.linux.org.uk>, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, Paul Burton <paul.burton@imgtec.com> Subject: [PATCH 06/10] MIPS: ensure Config5.UFE is clear on boot Date: Thu, 11 Sep 2014 08:30:19 +0100 [thread overview] Message-ID: <1410420623-11691-7-git-send-email-paul.burton@imgtec.com> (raw) Message-ID: <20140911073019.n-wyX33tNmGE2ZbyaQR5ZUnd47sxLqOtjpcrBx1iFxI@z> (raw) In-Reply-To: <1410420623-11691-1-git-send-email-paul.burton@imgtec.com> As is done for UFR, ensure that userland cannot directly manipulate the mode by clearing the UFE bit during boot. Signed-off-by: Paul Burton <paul.burton@imgtec.com> --- arch/mips/kernel/cpu-probe.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c index db929a0..4e2a6e0 100644 --- a/arch/mips/kernel/cpu-probe.c +++ b/arch/mips/kernel/cpu-probe.c @@ -400,7 +400,7 @@ static inline unsigned int decode_config5(struct cpuinfo_mips *c) unsigned int config5; config5 = read_c0_config5(); - config5 &= ~MIPS_CONF5_UFR; + config5 &= ~(MIPS_CONF5_UFR | MIPS_CONF5_UFE); write_c0_config5(config5); if (config5 & MIPS_CONF5_EVA) -- 2.0.4
next prev parent reply other threads:[~2014-09-11 8:37 UTC|newest] Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top 2014-09-11 7:30 [PATCH 00/10] MIPS O32 new FP ABI support Paul Burton 2014-09-11 7:30 ` Paul Burton 2014-09-11 7:30 ` [PATCH 01/10] binfmt_elf: hoist ELF program header loading to a function Paul Burton 2014-09-11 7:30 ` Paul Burton 2014-09-11 7:30 ` [PATCH 02/10] binfmt_elf: load interpreter program headers earlier Paul Burton 2014-09-11 7:30 ` Paul Burton 2014-11-13 12:20 ` Thierry Reding 2014-11-13 17:29 ` Ralf Baechle 2014-09-11 7:30 ` [PATCH 03/10] binfmt_elf: allow arch code to examine PT_LOPROC ... PT_HIPROC headers Paul Burton 2014-09-11 7:30 ` Paul Burton 2014-11-12 13:41 ` Thierry Reding 2014-11-13 0:16 ` Ralf Baechle 2014-11-13 12:25 ` Thierry Reding 2014-09-11 7:30 ` [PATCH 04/10] MIPS: define bits introduced for hybrid FPRs Paul Burton 2014-09-11 7:30 ` Paul Burton 2014-09-11 7:30 ` [PATCH 05/10] MIPS: detect presence of the FRE & UFR bits Paul Burton 2014-09-11 7:30 ` Paul Burton 2014-09-11 7:30 ` Paul Burton [this message] 2014-09-11 7:30 ` [PATCH 06/10] MIPS: ensure Config5.UFE is clear on boot Paul Burton 2014-09-11 7:30 ` [PATCH 07/10] MIPS: support for hybrid FPRs Paul Burton 2014-09-11 7:30 ` Paul Burton 2014-12-23 23:21 ` Aaro Koskinen 2014-12-23 23:31 ` James Hogan 2014-12-23 23:31 ` James Hogan 2014-12-23 23:51 ` Aaro Koskinen 2014-09-11 7:30 ` [PATCH 08/10] MIPS: ELF: add definition for the .MIPS.abiflags section Paul Burton 2014-09-11 7:30 ` Paul Burton 2014-09-11 7:30 ` [PATCH 09/10] MIPS: ELF: set FP mode according to .MIPS.abiflags Paul Burton 2014-09-11 7:30 ` Paul Burton 2014-09-11 7:30 ` [PATCH 10/10] MIPS: Kconfig option to better exercise/debug hybrid FPRs Paul Burton 2014-09-11 7:30 ` Paul Burton
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