From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH v1 7/7] x86: acpi: Don't touch hardware on HW reduced platforms
Date: Fri, 21 Jul 2017 22:32:06 +0300 [thread overview]
Message-ID: <20170721193206.586-8-andriy.shevchenko@linux.intel.com> (raw)
In-Reply-To: <20170721193206.586-1-andriy.shevchenko@linux.intel.com>
If ACPI HW reduced bit in FADT is set we should ignore any ACPI hardware
communications.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
arch/x86/lib/acpi_table.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/x86/lib/acpi_table.c b/arch/x86/lib/acpi_table.c
index da6014fb41..3eb101105b 100644
--- a/arch/x86/lib/acpi_table.c
+++ b/arch/x86/lib/acpi_table.c
@@ -463,6 +463,10 @@ ulong write_acpi_tables(ulong start)
debug("ACPI: done\n");
+ /* Don't touch ACPI hardware on HW reduced platforms */
+ if (fadt->flags & ACPI_FADT_HW_REDUCED_ACPI)
+ return current;
+
/*
* Other than waiting for OSPM to request us to switch to ACPI mode,
* do it by ourselves, since SMI will not be triggered.
--
2.13.2
next prev parent reply other threads:[~2017-07-21 19:32 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-21 19:31 [U-Boot] [PATCH v1 0/7] x86: acpi: Few enhancements and improvements Andy Shevchenko
2017-07-21 19:32 ` [U-Boot] [PATCH v1 1/7] Makefile: Don't shadow actual error when compile ASL Andy Shevchenko
2017-07-22 12:59 ` Bin Meng
2017-07-22 16:38 ` Andy Shevchenko
2017-07-22 16:47 ` Bin Meng
2017-07-28 13:46 ` Bin Meng
2017-07-21 19:32 ` [U-Boot] [PATCH v1 2/7] Makefile: Export build date as integer Andy Shevchenko
2017-07-22 13:11 ` Bin Meng
2017-07-28 13:46 ` Bin Meng
2017-07-21 19:32 ` [U-Boot] [PATCH v1 3/7] x86: acpi: Fill OEM revision Andy Shevchenko
2017-07-22 13:12 ` Bin Meng
2017-07-28 13:46 ` Bin Meng
2017-07-21 19:32 ` [U-Boot] [PATCH v1 4/7] x86: acpi: Name fields in FADT in accordance with specification Andy Shevchenko
2017-07-22 13:14 ` Bin Meng
2017-07-28 13:46 ` Bin Meng
2017-07-21 19:32 ` [U-Boot] [PATCH v1 5/7] x86: acpi: Deduplicate acpi_fill_madt() implementation Andy Shevchenko
2017-07-22 13:33 ` Bin Meng
2017-07-28 13:46 ` Bin Meng
2017-07-21 19:32 ` [U-Boot] [PATCH v1 6/7] x86: acpi: Export acpi_fill_mcfg() with __weak attribute Andy Shevchenko
2017-07-22 13:34 ` Bin Meng
2017-07-28 13:46 ` Bin Meng
2017-07-21 19:32 ` Andy Shevchenko [this message]
2017-07-22 13:45 ` [U-Boot] [PATCH v1 7/7] x86: acpi: Don't touch hardware on HW reduced platforms Bin Meng
2017-07-22 16:43 ` Andy Shevchenko
2017-07-22 16:51 ` Bin Meng
2017-07-23 0:48 ` Bin Meng
2017-07-25 18:12 ` Andy Shevchenko
2017-07-28 13:46 ` Bin Meng
2017-07-21 19:34 ` [U-Boot] [PATCH v1 0/7] x86: acpi: Few enhancements and improvements Andy Shevchenko
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20170721193206.586-8-andriy.shevchenko@linux.intel.com \
--to=andriy.shevchenko@linux.intel.com \
--cc=u-boot@lists.denx.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox