From: "Prakhya, Sai Praneeth" <sai.praneeth.prakhya@intel.com>
To: Mark Rutland <mark.rutland@arm.com>
Cc: "linux-efi@vger.kernel.org" <linux-efi@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"Lee@lakrids.cambridge.arm.com" <Lee@lakrids.cambridge.arm.com>,
Chun-Yi <jlee@suse.com>, Borislav Petkov <bp@alien8.de>,
"Luck, Tony" <tony.luck@intel.com>,
Will Deacon <will.deacon@arm.com>,
"Hansen, Dave" <dave.hansen@intel.com>,
Bhupesh Sharma <bhsharma@redhat.com>,
"Neri, Ricardo" <ricardo.neri@intel.com>,
"Shankar, Ravi V" <ravi.v.shankar@intel.com>,
Matt Fleming <matt@codeblueprint.co.uk>,
"Zijlstra, Peter" <peter.zijlstra@intel.com>,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
"Williams, Dan J" <dan.j.williams@intel.com>
Subject: RE: [PATCH V2 2/3] efi: Introduce efi_rts_workqueue and some infrastructure to invoke all efi_runtime_services()
Date: Thu, 8 Mar 2018 04:00:22 +0000 [thread overview]
Message-ID: <FFF73D592F13FD46B8700F0A279B802F2E5817B3@ORSMSX114.amr.corp.intel.com> (raw)
In-Reply-To: <20180306111339.xjrugce553f2egzh@lakrids.cambridge.arm.com>
-0800, Sai Praneeth Prakhya wrote:
> > @@ -329,6 +331,19 @@ static int __init efisubsys_init(void)
> > return 0;
> >
> > /*
> > + * Since we process only one efi_runtime_service() at a time, an
> > + * ordered workqueue (which creates only one execution context)
> > + * should suffice all our needs.
> > + */
> > + efi_rts_wq = alloc_ordered_workqueue("efi_rts_workqueue", 0);
> > + if (!efi_rts_wq) {
> > + pr_err("Failed to create efi_rts_workqueue, EFI runtime services
> "
> > + "disabled.\n");
> > + clear_bit(EFI_RUNTIME_SERVICES, &efi.flags);
> > + return 0;
> > + }
>
> I'm a little worried that something might sample this flag between it being set in
> an early_initcall (arm_enable_runtime_services), and cleared in a subsys_initcall
> here.
>
> However, nothing seems to do that so far, so maybe that's ok...
>
Thanks for raising this. I will take a look at initcalls.
> [...]
>
> > +/* efi_runtime_service() function identifiers */ enum {
> > + GET_TIME,
> > + SET_TIME,
> > + GET_WAKEUP_TIME,
> > + SET_WAKEUP_TIME,
> > + GET_VARIABLE,
> > + GET_NEXT_VARIABLE,
> > + SET_VARIABLE,
> > + SET_VARIABLE_NONBLOCKING,
> > + QUERY_VARIABLE_INFO,
> > + QUERY_VARIABLE_INFO_NONBLOCKING,
> > + GET_NEXT_HIGH_MONO_COUNT,
> > + RESET_SYSTEM,
> > + UPDATE_CAPSULE,
> > + QUERY_CAPSULE_CAPS,
> > +};
>
> Can we please give this enum a name....
Sure! Added in V3.
>
> [...]
>
> > +/*
> > + * efi_runtime_work: Details of EFI Runtime Service work
> > + * @func: EFI Runtime Service function identifier
> > + * @arg<1-5>: EFI Runtime Service function arguments
> > + * @status: Status of executing EFI Runtime Service
> > + */
> > +struct efi_runtime_work {
> > + u8 func;
>
> ... and use it here rather than an opaque u8? I realise that means placing the
> enum in <linux/efi.h>.
>
Actually, with Miguel comments, I am considering making this struct static and moving
it to runtime-wrappers.c, since "struct efi_runtime_work" isn't really being used anywhere
except runtime-wrappers.c. Please see in V3.
> > + void *arg1;
> > + void *arg2;
> > + void *arg3;
> > + void *arg4;
> > + void *arg5;
> > + efi_status_t status;
> > + struct work_struct work;
> > +};
>
> Thanks,
> Mark.
next prev parent reply other threads:[~2018-03-08 4:00 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-05 23:23 [PATCH V2 0/3] Use efi_rts_workqueue to invoke EFI Runtime Services Sai Praneeth Prakhya
2018-03-05 23:23 ` [PATCH V2 1/3] x86/efi: Call efi_delete_dummy_variable() during efi subsystem initialization Sai Praneeth Prakhya
2018-03-08 7:43 ` Ard Biesheuvel
2018-03-08 18:06 ` Prakhya, Sai Praneeth
2018-03-05 23:23 ` [PATCH V2 2/3] efi: Introduce efi_rts_workqueue and some infrastructure to invoke all efi_runtime_services() Sai Praneeth Prakhya
2018-03-06 11:13 ` Mark Rutland
2018-03-08 4:00 ` Prakhya, Sai Praneeth [this message]
2018-03-07 11:55 ` Miguel Ojeda
2018-03-08 4:22 ` Prakhya, Sai Praneeth
2018-03-08 9:12 ` Miguel Ojeda
2018-03-08 18:09 ` Prakhya, Sai Praneeth
2018-03-07 12:11 ` Borislav Petkov
2018-03-08 5:31 ` Prakhya, Sai Praneeth
2018-03-08 14:08 ` Borislav Petkov
2018-03-08 17:05 ` Luck, Tony
2018-03-09 10:57 ` Borislav Petkov
2018-03-09 2:37 ` Prakhya, Sai Praneeth
2018-03-09 11:11 ` Borislav Petkov
2018-03-10 0:33 ` Prakhya, Sai Praneeth
2018-03-14 17:40 ` Borislav Petkov
2018-03-08 5:38 ` Prakhya, Sai Praneeth
2018-03-05 23:23 ` [PATCH V2 3/3] efi: Use efi_rts_workqueue to invoke EFI Runtime Services Sai Praneeth Prakhya
2018-03-06 0:05 ` Dan Williams
2018-03-06 0:56 ` Prakhya, Sai Praneeth
2018-03-06 11:26 ` Mark Rutland
2018-03-08 4:11 ` Prakhya, Sai Praneeth
2018-03-08 4:33 ` Dan Williams
2018-03-08 5:06 ` Prakhya, Sai Praneeth
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