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From: mark gross <mgross@linux.intel.com>
To: speck@linutronix.de
Subject: [MODERATED] Re: Re: [PATCH 2/4] V8 more sampling fun 2
Date: Thu, 16 Apr 2020 15:47:44 -0700	[thread overview]
Message-ID: <20200416224744.GB2583@u1904> (raw)
In-Reply-To: <20200416173323.GF21456@zn.tnic>

ack

Signed-off-by: Mark Gross <mgross@linux.intel.com>

thanks!

--mark

On Thu, Apr 16, 2020 at 07:33:24PM +0200, speck for Borislav Petkov wrote:
> On Thu, Apr 16, 2020 at 12:16:21PM -0500, speck for Josh Poimboeuf wrote:
> > On Mon, Mar 16, 2020 at 05:56:27PM -0700, speck for mark gross wrote:
> > > From: mark gross <mgross@linux.intel.com>
> > > Subject: [PATCH 2/4] x86/cpu: clean up cpu_matches
> > 
> > Vague subject, how about
> > 
> >   x86/cpu: Add 'table' argument to cpu_matches()
> 
> Fixed, below final result:
> 
> ---
> From: Mark Gross <mgross@linux.intel.com>
> Date: Thu, 16 Apr 2020 17:32:42 +0200
> Subject: [PATCH] x86/cpu: Add 'table' argument to cpu_matches()
> 
> To make cpu_matches() reusable for other matching tables, have it take a
> x86_cpu_id table as an argument.
> 
>  [ bp: Flip arguments order. ]
> 
> Signed-off-by: Mark Gross <mgross@linux.intel.com>
> Signed-off-by: Borislav Petkov <bp@suse.de>
> ---
>  arch/x86/kernel/cpu/common.c | 25 ++++++++++++++-----------
>  1 file changed, 14 insertions(+), 11 deletions(-)
> 
> diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
> index bed0cb83fe24..1131ae032bf2 100644
> --- a/arch/x86/kernel/cpu/common.c
> +++ b/arch/x86/kernel/cpu/common.c
> @@ -1075,9 +1075,9 @@ static const __initconst struct x86_cpu_id cpu_vuln_whitelist[] = {
>  	{}
>  };
>  
> -static bool __init cpu_matches(unsigned long which)
> +static bool __init cpu_matches(const struct x86_cpu_id *table, unsigned long which)
>  {
> -	const struct x86_cpu_id *m = x86_match_cpu(cpu_vuln_whitelist);
> +	const struct x86_cpu_id *m = x86_match_cpu(table);
>  
>  	return m && !!(m->driver_data & which);
>  }
> @@ -1097,31 +1097,34 @@ static void __init cpu_set_bug_bits(struct cpuinfo_x86 *c)
>  	u64 ia32_cap = x86_read_arch_cap_msr();
>  
>  	/* Set ITLB_MULTIHIT bug if cpu is not in the whitelist and not mitigated */
> -	if (!cpu_matches(NO_ITLB_MULTIHIT) && !(ia32_cap & ARCH_CAP_PSCHANGE_MC_NO))
> +	if (!cpu_matches(cpu_vuln_whitelist, NO_ITLB_MULTIHIT) &&
> +	    !(ia32_cap & ARCH_CAP_PSCHANGE_MC_NO))
>  		setup_force_cpu_bug(X86_BUG_ITLB_MULTIHIT);
>  
> -	if (cpu_matches(NO_SPECULATION))
> +	if (cpu_matches(cpu_vuln_whitelist, NO_SPECULATION))
>  		return;
>  
>  	setup_force_cpu_bug(X86_BUG_SPECTRE_V1);
>  
> -	if (!cpu_matches(NO_SPECTRE_V2))
> +	if (!cpu_matches(cpu_vuln_whitelist, NO_SPECTRE_V2))
>  		setup_force_cpu_bug(X86_BUG_SPECTRE_V2);
>  
> -	if (!cpu_matches(NO_SSB) && !(ia32_cap & ARCH_CAP_SSB_NO) &&
> +	if (!cpu_matches(cpu_vuln_whitelist, NO_SSB) &&
> +	    !(ia32_cap & ARCH_CAP_SSB_NO) &&
>  	   !cpu_has(c, X86_FEATURE_AMD_SSB_NO))
>  		setup_force_cpu_bug(X86_BUG_SPEC_STORE_BYPASS);
>  
>  	if (ia32_cap & ARCH_CAP_IBRS_ALL)
>  		setup_force_cpu_cap(X86_FEATURE_IBRS_ENHANCED);
>  
> -	if (!cpu_matches(NO_MDS) && !(ia32_cap & ARCH_CAP_MDS_NO)) {
> +	if (!cpu_matches(cpu_vuln_whitelist, NO_MDS) &&
> +	    !(ia32_cap & ARCH_CAP_MDS_NO)) {
>  		setup_force_cpu_bug(X86_BUG_MDS);
> -		if (cpu_matches(MSBDS_ONLY))
> +		if (cpu_matches(cpu_vuln_whitelist, MSBDS_ONLY))
>  			setup_force_cpu_bug(X86_BUG_MSBDS_ONLY);
>  	}
>  
> -	if (!cpu_matches(NO_SWAPGS))
> +	if (!cpu_matches(cpu_vuln_whitelist, NO_SWAPGS))
>  		setup_force_cpu_bug(X86_BUG_SWAPGS);
>  
>  	/*
> @@ -1139,7 +1142,7 @@ static void __init cpu_set_bug_bits(struct cpuinfo_x86 *c)
>  	     (ia32_cap & ARCH_CAP_TSX_CTRL_MSR)))
>  		setup_force_cpu_bug(X86_BUG_TAA);
>  
> -	if (cpu_matches(NO_MELTDOWN))
> +	if (cpu_matches(cpu_vuln_whitelist, NO_MELTDOWN))
>  		return;
>  
>  	/* Rogue Data Cache Load? No! */
> @@ -1148,7 +1151,7 @@ static void __init cpu_set_bug_bits(struct cpuinfo_x86 *c)
>  
>  	setup_force_cpu_bug(X86_BUG_CPU_MELTDOWN);
>  
> -	if (cpu_matches(NO_L1TF))
> +	if (cpu_matches(cpu_vuln_whitelist, NO_L1TF))
>  		return;
>  
>  	setup_force_cpu_bug(X86_BUG_L1TF);
> -- 
> 2.21.0
> 
> SUSE Software Solutions Germany GmbH, GF: Felix Imendörffer, HRB 36809, AG Nürnberg
> -- 

  reply	other threads:[~2020-04-16 22:47 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-16  0:14 [MODERATED] [PATCH 0/4] V8 more sampling fun 0 mark gross
2020-01-16 22:16 ` [MODERATED] [PATCH 3/4] V8 more sampling fun 3 mark gross
2020-01-30 19:12 ` [MODERATED] [PATCH 4/4] V8 more sampling fun 4 mark gross
2020-03-17  0:56 ` [MODERATED] [PATCH 1/4] V8 more sampling fun 1 mark gross
2020-03-17  0:56 ` [MODERATED] [PATCH 2/4] V8 more sampling fun 2 mark gross
2020-04-16 17:15 ` [MODERATED] Re: [PATCH 1/4] V8 more sampling fun 1 Josh Poimboeuf
2020-04-16 17:30   ` Borislav Petkov
2020-04-16 17:16 ` [MODERATED] Re: [PATCH 2/4] V8 more sampling fun 2 Josh Poimboeuf
2020-04-16 17:33   ` [MODERATED] " Borislav Petkov
2020-04-16 22:47     ` mark gross [this message]
2020-04-16 17:17 ` [MODERATED] Re: [PATCH 3/4] V8 more sampling fun 3 Josh Poimboeuf
2020-04-16 17:44   ` Borislav Petkov
2020-04-16 18:01     ` Josh Poimboeuf
2020-04-16 22:45       ` mark gross
2020-04-16 22:57     ` mark gross
2020-04-17 12:34     ` Thomas Gleixner
2020-04-17 13:19       ` [MODERATED] " Josh Poimboeuf
2020-04-17 16:46         ` Luck, Tony
2020-04-17 19:22         ` Thomas Gleixner
2020-04-16 22:54   ` [MODERATED] " mark gross
2020-04-16 17:20 ` [MODERATED] Re: [PATCH 4/4] V8 more sampling fun 4 Josh Poimboeuf
2020-04-16 17:49   ` [MODERATED] " Borislav Petkov
2020-04-16 22:57     ` mark gross
2020-04-20 14:30     ` mark gross
2020-04-20 16:17       ` Thomas Gleixner
2020-04-20 22:30         ` [MODERATED] " mark gross
2020-04-20 21:45       ` Slow Randomizing Boosts Denial of Service - Bulletin #1 Thomas Gleixner
2020-04-23 21:35         ` [MODERATED] " mark gross
2020-04-24  7:01           ` Greg KH
2020-04-27 15:10             ` mark gross
2020-04-21 17:30 ` [MODERATED] Re: [PATCH 4/4] V8 more sampling fun 4 Borislav Petkov
2020-04-21 17:34   ` Andrew Cooper
2020-04-21 18:19     ` Borislav Petkov

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