From: Jan Beulich <jbeulich@suse.com>
To: "Roger Pau Monné" <roger.pau@citrix.com>
Cc: "xen-devel@lists.xenproject.org" <xen-devel@lists.xenproject.org>,
Andrew Cooper <andrew.cooper3@citrix.com>, Wei Liu <wl@xen.org>,
Julien Grall <julien@xen.org>
Subject: Re: [PATCH 2/4] x86/ACPI: fix S3 wakeup vector mapping
Date: Mon, 23 Nov 2020 16:30:05 +0100 [thread overview]
Message-ID: <79776889-c566-5f07-abfe-2cb79cfa78fa@suse.com> (raw)
In-Reply-To: <20201123152454.yjr3jgvsyucftrff@Air-de-Roger>
On 23.11.2020 16:24, Roger Pau Monné wrote:
> On Mon, Nov 23, 2020 at 01:40:12PM +0100, Jan Beulich wrote:
>> --- a/xen/arch/x86/acpi/power.c
>> +++ b/xen/arch/x86/acpi/power.c
>> @@ -174,17 +174,20 @@ static void acpi_sleep_prepare(u32 state
>> if ( state != ACPI_STATE_S3 )
>> return;
>>
>> - wakeup_vector_va = __acpi_map_table(
>> - acpi_sinfo.wakeup_vector, sizeof(uint64_t));
>> -
>> /* TBoot will set resume vector itself (when it is safe to do so). */
>> if ( tboot_in_measured_env() )
>> return;
>>
>> + set_fixmap(FIX_ACPI_END, acpi_sinfo.wakeup_vector);
>> + wakeup_vector_va = fix_to_virt(FIX_ACPI_END) +
>> + PAGE_OFFSET(acpi_sinfo.wakeup_vector);
>> +
>> if ( acpi_sinfo.vector_width == 32 )
>> *(uint32_t *)wakeup_vector_va = bootsym_phys(wakeup_start);
>> else
>> *(uint64_t *)wakeup_vector_va = bootsym_phys(wakeup_start);
>> +
>> + clear_fixmap(FIX_ACPI_END);
>
> Why not use vmap here instead of the fixmap?
Considering the S3 path is relatively fragile (as in: we end up
breaking it more often than about anything else) I wanted to
make as little of a change as possible. Hence I decided to stick
to the fixmap use that was (indirectly) used before as well.
Jan
next prev parent reply other threads:[~2020-11-23 15:30 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-23 12:38 [PATCH 0/4] x86: ACPI and DMI table mapping fixes Jan Beulich
2020-11-23 12:39 ` [PATCH 1/4] x86/ACPI: fix mapping of FACS Jan Beulich
2020-11-23 14:30 ` Roger Pau Monné
2020-12-29 10:56 ` Roger Pau Monné
2021-01-04 13:18 ` Jan Beulich
2020-11-23 12:40 ` [PATCH 2/4] x86/ACPI: fix S3 wakeup vector mapping Jan Beulich
2020-11-23 15:24 ` Roger Pau Monné
2020-11-23 15:30 ` Jan Beulich [this message]
2020-11-23 16:07 ` Roger Pau Monné
2020-11-23 16:14 ` Andrew Cooper
2020-11-24 11:04 ` Jan Beulich
2020-11-30 13:02 ` Jan Beulich
2020-12-23 15:09 ` Ping: " Jan Beulich
2020-12-29 10:54 ` Roger Pau Monné
2021-01-04 14:03 ` Jan Beulich
2021-01-04 15:13 ` Roger Pau Monné
2020-12-29 10:51 ` Roger Pau Monné
2021-01-04 14:10 ` Jan Beulich
2020-11-23 12:40 ` [PATCH 3/4] x86/DMI: fix table mapping when one lives above 1Mb Jan Beulich
2020-11-23 15:41 ` Roger Pau Monné
2020-11-23 12:41 ` [PATCH 4/4] x86/ACPI: don't invalidate S5 data when S3 wakeup vector cannot be determined Jan Beulich
2020-11-23 15:44 ` Roger Pau Monné
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