From: Michael Ellerman <mpe@ellerman.id.au>
To: gregkh@linuxfoundation.org
Cc: stable@vger.kernel.org, linuxppc-dev@ozlabs.org
Subject: [PATCH stable 4.9 05/23] powerpc/rfi-flush: Make it possible to call setup_rfi_flush() again
Date: Sat, 2 Jun 2018 21:08:50 +1000 [thread overview]
Message-ID: <20180602110908.29773-6-mpe@ellerman.id.au> (raw)
In-Reply-To: <20180602110908.29773-1-mpe@ellerman.id.au>
commit abf110f3e1cea40f5ea15e85f5d67c39c14568a7 upstream.
For PowerVM migration we want to be able to call setup_rfi_flush()
again after we've migrated the partition.
To support that we need to check that we're not trying to allocate the
fallback flush area after memblock has gone away (i.e., boot-time only).
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Mauricio Faria de Oliveira <mauricfo@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
---
arch/powerpc/include/asm/setup.h | 2 +-
arch/powerpc/kernel/setup_64.c | 6 +++++-
2 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/include/asm/setup.h b/arch/powerpc/include/asm/setup.h
index 6825a67cc3db..3f160cd20107 100644
--- a/arch/powerpc/include/asm/setup.h
+++ b/arch/powerpc/include/asm/setup.h
@@ -48,7 +48,7 @@ enum l1d_flush_type {
L1D_FLUSH_MTTRIG = 0x8,
};
-void __init setup_rfi_flush(enum l1d_flush_type, bool enable);
+void setup_rfi_flush(enum l1d_flush_type, bool enable);
void do_rfi_flush_fixups(enum l1d_flush_type types);
#endif /* !__ASSEMBLY__ */
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index e6bed89a98ed..568793009daa 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -731,6 +731,10 @@ static void init_fallback_flush(void)
u64 l1d_size, limit;
int cpu;
+ /* Only allocate the fallback flush area once (at boot time). */
+ if (l1d_flush_fallback_area)
+ return;
+
l1d_size = ppc64_caches.dsize;
limit = min(safe_stack_limit(), ppc64_rma_size);
@@ -748,7 +752,7 @@ static void init_fallback_flush(void)
}
}
-void __init setup_rfi_flush(enum l1d_flush_type types, bool enable)
+void setup_rfi_flush(enum l1d_flush_type types, bool enable)
{
if (types & L1D_FLUSH_FALLBACK) {
pr_info("rfi-flush: Using fallback displacement flush\n");
--
2.14.1
next prev parent reply other threads:[~2018-06-02 11:09 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-02 11:08 [PATCH stable 4.9 00/23] powerpc backports for 4.9 Michael Ellerman
2018-06-02 11:08 ` [PATCH stable 4.9 01/23] powerpc/rfi-flush: Move out of HARDLOCKUP_DETECTOR #ifdef Michael Ellerman
2018-06-02 13:35 ` Patch "powerpc/rfi-flush: Move out of HARDLOCKUP_DETECTOR #ifdef" has been added to the 4.9-stable tree gregkh
2018-06-02 11:08 ` [PATCH stable 4.9 02/23] powerpc/pseries: Support firmware disable of RFI flush Michael Ellerman
2018-06-02 13:35 ` Patch "powerpc/pseries: Support firmware disable of RFI flush" has been added to the 4.9-stable tree gregkh
2018-06-02 11:08 ` [PATCH stable 4.9 03/23] powerpc/powernv: Support firmware disable of RFI flush Michael Ellerman
2018-06-02 13:35 ` Patch "powerpc/powernv: Support firmware disable of RFI flush" has been added to the 4.9-stable tree gregkh
2018-06-02 11:08 ` [PATCH stable 4.9 04/23] powerpc/rfi-flush: Move the logic to avoid a redo into the debugfs code Michael Ellerman
2018-06-02 13:35 ` Patch "powerpc/rfi-flush: Move the logic to avoid a redo into the debugfs code" has been added to the 4.9-stable tree gregkh
2018-06-02 11:08 ` Michael Ellerman [this message]
2018-06-02 13:35 ` Patch "powerpc/rfi-flush: Make it possible to call setup_rfi_flush() again" " gregkh
2018-06-02 11:08 ` [PATCH stable 4.9 06/23] powerpc/rfi-flush: Always enable fallback flush on pseries Michael Ellerman
2018-06-02 13:35 ` Patch "powerpc/rfi-flush: Always enable fallback flush on pseries" has been added to the 4.9-stable tree gregkh
2018-06-02 11:08 ` [PATCH stable 4.9 07/23] powerpc/rfi-flush: Differentiate enabled and patched flush types Michael Ellerman
2018-06-02 13:35 ` Patch "powerpc/rfi-flush: Differentiate enabled and patched flush types" has been added to the 4.9-stable tree gregkh
2018-06-02 11:08 ` [PATCH stable 4.9 08/23] powerpc/rfi-flush: Call setup_rfi_flush() after LPM migration Michael Ellerman
2018-06-02 13:35 ` Patch "powerpc/rfi-flush: Call setup_rfi_flush() after LPM migration" has been added to the 4.9-stable tree gregkh
2018-06-02 11:08 ` [PATCH stable 4.9 09/23] powerpc/pseries: Add new H_GET_CPU_CHARACTERISTICS flags Michael Ellerman
2018-06-02 13:35 ` Patch "powerpc/pseries: Add new H_GET_CPU_CHARACTERISTICS flags" has been added to the 4.9-stable tree gregkh
2018-06-02 11:08 ` [PATCH stable 4.9 10/23] powerpc: Add security feature flags for Spectre/Meltdown Michael Ellerman
2018-06-02 13:35 ` Patch "powerpc: Add security feature flags for Spectre/Meltdown" has been added to the 4.9-stable tree gregkh
2018-06-02 11:08 ` [PATCH stable 4.9 11/23] powerpc/pseries: Set or clear security feature flags Michael Ellerman
2018-06-02 13:35 ` Patch "powerpc/pseries: Set or clear security feature flags" has been added to the 4.9-stable tree gregkh
2018-06-02 11:08 ` [PATCH stable 4.9 12/23] powerpc/powernv: Set or clear security feature flags Michael Ellerman
2018-06-02 13:35 ` Patch "powerpc/powernv: Set or clear security feature flags" has been added to the 4.9-stable tree gregkh
2018-06-02 11:08 ` [PATCH stable 4.9 13/23] powerpc/64s: Move cpu_show_meltdown() Michael Ellerman
2018-06-02 13:35 ` Patch "powerpc/64s: Move cpu_show_meltdown()" has been added to the 4.9-stable tree gregkh
2018-06-02 11:08 ` [PATCH stable 4.9 14/23] powerpc/64s: Enhance the information in cpu_show_meltdown() Michael Ellerman
2018-06-02 13:35 ` Patch "powerpc/64s: Enhance the information in cpu_show_meltdown()" has been added to the 4.9-stable tree gregkh
2018-06-02 11:09 ` [PATCH stable 4.9 15/23] powerpc/powernv: Use the security flags in pnv_setup_rfi_flush() Michael Ellerman
2018-06-02 13:35 ` Patch "powerpc/powernv: Use the security flags in pnv_setup_rfi_flush()" has been added to the 4.9-stable tree gregkh
2018-06-02 11:09 ` [PATCH stable 4.9 16/23] powerpc/pseries: Use the security flags in pseries_setup_rfi_flush() Michael Ellerman
2018-06-02 13:35 ` Patch "powerpc/pseries: Use the security flags in pseries_setup_rfi_flush()" has been added to the 4.9-stable tree gregkh
2018-06-02 11:09 ` [PATCH stable 4.9 17/23] powerpc/64s: Wire up cpu_show_spectre_v1() Michael Ellerman
2018-06-02 13:35 ` Patch "powerpc/64s: Wire up cpu_show_spectre_v1()" has been added to the 4.9-stable tree gregkh
2018-06-02 11:09 ` [PATCH stable 4.9 18/23] powerpc/64s: Wire up cpu_show_spectre_v2() Michael Ellerman
2018-06-02 13:35 ` Patch "powerpc/64s: Wire up cpu_show_spectre_v2()" has been added to the 4.9-stable tree gregkh
2018-06-02 11:09 ` [PATCH stable 4.9 19/23] powerpc/pseries: Fix clearing of security feature flags Michael Ellerman
2018-06-02 13:35 ` Patch "powerpc/pseries: Fix clearing of security feature flags" has been added to the 4.9-stable tree gregkh
2018-06-02 11:09 ` [PATCH stable 4.9 20/23] powerpc: Move default security feature flags Michael Ellerman
2018-06-02 13:35 ` Patch "powerpc: Move default security feature flags" has been added to the 4.9-stable tree gregkh
2018-06-02 11:09 ` [PATCH stable 4.9 21/23] powerpc/pseries: Restore default security feature flags on setup Michael Ellerman
2018-06-02 13:35 ` Patch "powerpc/pseries: Restore default security feature flags on setup" has been added to the 4.9-stable tree gregkh
2018-06-02 11:09 ` [PATCH stable 4.9 22/23] powerpc/64s: Fix section mismatch warnings from setup_rfi_flush() Michael Ellerman
2018-06-02 13:35 ` Patch "powerpc/64s: Fix section mismatch warnings from setup_rfi_flush()" has been added to the 4.9-stable tree gregkh
2018-06-02 11:09 ` [PATCH stable 4.9 23/23] powerpc/64s: Add support for a store forwarding barrier at kernel entry/exit Michael Ellerman
2018-06-02 13:35 ` Patch "powerpc/64s: Add support for a store forwarding barrier at kernel entry/exit" has been added to the 4.9-stable tree gregkh
2018-06-02 13:30 ` [PATCH stable 4.9 00/23] powerpc backports for 4.9 Greg KH
2018-06-03 10:22 ` Michael Ellerman
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=20180602110908.29773-6-mpe@ellerman.id.au \
--to=mpe@ellerman.id.au \
--cc=gregkh@linuxfoundation.org \
--cc=linuxppc-dev@ozlabs.org \
--cc=stable@vger.kernel.org \
/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;
as well as URLs for NNTP newsgroup(s).