From: Borislav Petkov <bp@alien8.de>
To: "Chang S. Bae" <chang.seok.bae@intel.com>
Cc: linux-kernel@vger.kernel.org, x86@kernel.org, tglx@linutronix.de,
dave.hansen@linux.intel.com, arjan@linux.intel.com,
ravi.v.shankar@intel.com
Subject: Re: [PATCH 15/23] x86/fpu: Add sanity checks for XFD
Date: Mon, 25 Oct 2021 10:11:20 +0200 [thread overview]
Message-ID: <YXZmqF3KlHZBrdgn@zn.tnic> (raw)
In-Reply-To: <20211021225527.10184-16-chang.seok.bae@intel.com>
On Thu, Oct 21, 2021 at 03:55:19PM -0700, Chang S. Bae wrote:
> @@ -217,12 +240,15 @@ static inline int xrstor_from_user_sigframe(struct xregs_state __user *buf, u64
> * Restore xstate from kernel space xsave area, return an error code instead of
> * an exception.
> */
> -static inline int os_xrstor_safe(struct xregs_state *xstate, u64 mask)
> +static inline int os_xrstor_safe(struct fpstate *fpstate, u64 mask)
> {
> + struct xregs_state *xstate = &fpstate->regs.xsave;
> u32 lmask = mask;
> u32 hmask = mask >> 32;
> int err;
>
> + /* Must enforce XFD update here */
> +
<--- something's missing here?
> if (cpu_feature_enabled(X86_FEATURE_XSAVES))
> XSTATE_OP(XRSTORS, xstate, lmask, hmask, err);
> else
> --
> 2.17.1
>
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
next prev parent reply other threads:[~2021-10-25 8:11 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-21 22:55 [PATCH 00/23] x86: Support Intel Advanced Matrix Extensions (part 4) Chang S. Bae
2021-10-21 22:55 ` [PATCH 01/23] signal: Add an optional check for altstack size Chang S. Bae
2021-10-22 0:06 ` Bae, Chang Seok
2021-10-22 15:20 ` Eric W. Biederman
2021-10-22 20:58 ` Bae, Chang Seok
2021-10-22 22:51 ` Dave Hansen
2021-10-26 16:16 ` [tip: x86/fpu] " tip-bot2 for Thomas Gleixner
2021-10-21 22:55 ` [PATCH 02/23] x86/signal: Implement sigaltstack size validation Chang S. Bae
2021-10-26 16:16 ` [tip: x86/fpu] " tip-bot2 for Thomas Gleixner
2021-10-21 22:55 ` [PATCH 03/23] x86/fpu/xstate: Provide xstate_calculate_size() Chang S. Bae
2021-10-26 16:16 ` [tip: x86/fpu] " tip-bot2 for Chang S. Bae
2021-10-21 22:55 ` [PATCH 04/23] x86/fpu: Add members to struct fpu to cache permission information Chang S. Bae
2021-10-26 16:16 ` [tip: x86/fpu] " tip-bot2 for Thomas Gleixner
2021-10-21 22:55 ` [PATCH 05/23] x86/fpu: Add fpu_state_config::legacy_features Chang S. Bae
2021-10-26 16:16 ` [tip: x86/fpu] " tip-bot2 for Thomas Gleixner
2021-10-21 22:55 ` [PATCH 06/23] x86/arch_prctl: Add controls for dynamic XSTATE components Chang S. Bae
2021-10-24 21:17 ` Borislav Petkov
2021-10-26 9:11 ` [PATCH] Documentation/x86: Add documentation for using dynamic XSTATE features Chang S. Bae
2021-10-26 16:16 ` [tip: x86/fpu] " tip-bot2 for Chang S. Bae
2021-10-28 13:10 ` tip-bot2 for Chang S. Bae
2021-10-26 16:16 ` [tip: x86/fpu] x86/arch_prctl: Add controls for dynamic XSTATE components tip-bot2 for Chang S. Bae
2021-10-21 22:55 ` [PATCH 07/23] x86/fpu: Add basic helpers for dynamically enabled features Chang S. Bae
2021-10-26 16:16 ` [tip: x86/fpu] " tip-bot2 for Thomas Gleixner
2021-10-21 22:55 ` [PATCH 08/23] x86/signal: Use fpu::__state_user_size for sigalt stack validation Chang S. Bae
2021-10-26 16:16 ` [tip: x86/fpu] " tip-bot2 for Thomas Gleixner
2021-10-21 22:55 ` [PATCH 09/23] x86/fpu/signal: Prepare for variable sigframe length Chang S. Bae
2021-10-26 16:16 ` [tip: x86/fpu] " tip-bot2 for Chang S. Bae
2021-10-21 22:55 ` [PATCH 10/23] x86/fpu: Prepare fpu_clone() for dynamically enabled features Chang S. Bae
2021-10-26 16:16 ` [tip: x86/fpu] " tip-bot2 for Thomas Gleixner
2021-10-21 22:55 ` [PATCH 11/23] x86/fpu: Reset permission and fpstate on exec() Chang S. Bae
2021-10-26 16:16 ` [tip: x86/fpu] " tip-bot2 for Chang S. Bae
2021-10-21 22:55 ` [PATCH 12/23] x86/cpufeatures: Add eXtended Feature Disabling (XFD) feature bit Chang S. Bae
2021-10-26 16:16 ` [tip: x86/fpu] " tip-bot2 for Chang S. Bae
2021-10-21 22:55 ` [PATCH 13/23] x86/msr-index: Add MSRs for XFD Chang S. Bae
2021-10-26 16:16 ` [tip: x86/fpu] " tip-bot2 for Chang S. Bae
2021-10-21 22:55 ` [PATCH 14/23] x86/fpu: Add XFD state to fpstate Chang S. Bae
2021-10-26 16:16 ` [tip: x86/fpu] " tip-bot2 for Chang S. Bae
2021-10-21 22:55 ` [PATCH 15/23] x86/fpu: Add sanity checks for XFD Chang S. Bae
2021-10-25 8:11 ` Borislav Petkov [this message]
2021-10-25 20:15 ` Thomas Gleixner
2021-10-25 8:33 ` Mika Penttilä
2021-10-25 18:13 ` Thomas Gleixner
2021-10-25 19:57 ` Dave Hansen
2021-10-26 16:16 ` [tip: x86/fpu] " tip-bot2 for Thomas Gleixner
2021-10-21 22:55 ` [PATCH 16/23] x86/fpu: Update XFD state where required Chang S. Bae
2021-10-26 16:16 ` [tip: x86/fpu] " tip-bot2 for Chang S. Bae
2021-10-21 22:55 ` [PATCH 17/23] x86/fpu/xstate: Add XFD #NM handler Chang S. Bae
2021-10-26 16:16 ` [tip: x86/fpu] " tip-bot2 for Chang S. Bae
2021-10-21 22:55 ` [PATCH 18/23] x86/fpu/xstate: Add fpstate_realloc()/free() Chang S. Bae
2021-10-26 16:16 ` [tip: x86/fpu] " tip-bot2 for Chang S. Bae
2021-10-21 22:55 ` [PATCH 19/23] x86/fpu/xstate: Prepare XSAVE feature table for gaps in state component numbers Chang S. Bae
2021-10-26 16:16 ` [tip: x86/fpu] " tip-bot2 for Chang S. Bae
2021-10-21 22:55 ` [PATCH 20/23] x86/fpu/amx: Define AMX state components and have it used for boot-time checks Chang S. Bae
2021-10-26 16:16 ` [tip: x86/fpu] " tip-bot2 for Chang S. Bae
2021-10-21 22:55 ` [PATCH 21/23] x86/fpu: Calculate the default sizes independently Chang S. Bae
2021-10-26 16:16 ` [tip: x86/fpu] " tip-bot2 for Chang S. Bae
2021-10-21 22:55 ` [PATCH 22/23] x86/fpu: Add XFD handling for dynamic states Chang S. Bae
2021-10-26 16:16 ` [tip: x86/fpu] " tip-bot2 for Chang S. Bae
2021-10-21 22:55 ` [PATCH 23/23] x86/fpu/amx: Enable the AMX feature in 64-bit mode Chang S. Bae
2021-10-26 16:16 ` [tip: x86/fpu] " tip-bot2 for Chang S. Bae
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