[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <055eee55f2ed04a822d99e1824d08a70aed942f5.camel@intel.com>
Date: Thu, 4 Jan 2024 22:47:16 +0000
From: "Edgecombe, Rick P" <rick.p.edgecombe@...el.com>
To: "kvm@...r.kernel.org" <kvm@...r.kernel.org>, "Yang, Weijiang"
<weijiang.yang@...el.com>, "pbonzini@...hat.com" <pbonzini@...hat.com>,
"seanjc@...gle.com" <seanjc@...gle.com>, "linux-kernel@...r.kernel.org"
<linux-kernel@...r.kernel.org>, "Hansen, Dave" <dave.hansen@...el.com>
CC: "john.allen@....com" <john.allen@....com>, "peterz@...radead.org"
<peterz@...radead.org>, "Gao, Chao" <chao.gao@...el.com>,
"mlevitsk@...hat.com" <mlevitsk@...hat.com>
Subject: Re: [PATCH v8 06/26] x86/fpu/xstate: Create guest fpstate with guest
specific config
On Thu, 2023-12-21 at 09:02 -0500, Yang Weijiang wrote:
> +static struct fpstate *__fpu_alloc_init_guest_fpstate(struct
> fpu_guest *gfpu)
> {
> + bool compacted = cpu_feature_enabled(X86_FEATURE_XCOMPACTED);
> + unsigned int gfpstate_size, size;
> struct fpstate *fpstate;
> - unsigned int size;
>
> - size = fpu_user_cfg.default_size + ALIGN(offsetof(struct
> fpstate, regs), 64);
> + /*
> + * fpu_guest_cfg.default_size is initialized to hold all
> enabled
> + * xfeatures except the user dynamic xfeatures. If the user
> dynamic
> + * xfeatures are enabled, the guest fpstate will be re-
> allocated to
> + * hold all guest enabled xfeatures, so omit user dynamic
> xfeatures
> + * here.
> + */
> + size = fpu_guest_cfg.default_size +
> + ALIGN(offsetof(struct fpstate, regs), 64);
> +
> fpstate = vzalloc(size);
> if (!fpstate)
> - return false;
> + return NULL;
> + /*
> + * Initialize sizes and feature masks, use fpu_user_cfg.*
> + * for user_* settings for compatibility of exiting uAPIs.
> + */
> + fpstate->size = gfpstate_size;
gfpstate_size is used uninitialized.
Powered by blists - more mailing lists