From: Michael Ellerman <mpe@ellerman.id.au>
To: greg@kroah.com
Cc: stable@vger.kernel.org, tglx@linutronix.de, linuxppc-dev@ozlabs.org
Subject: [PATCH stable 4.14 v2 05/23] powerpc/rfi-flush: Make it possible to call setup_rfi_flush() again
Date: Sat, 26 May 2018 14:27:31 +1000 [thread overview]
Message-ID: <20180526042749.5324-6-mpe@ellerman.id.au> (raw)
In-Reply-To: <20180526042749.5324-1-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 469b7fdc9be4..bbcdf929be54 100644
--- a/arch/powerpc/include/asm/setup.h
+++ b/arch/powerpc/include/asm/setup.h
@@ -49,7 +49,7 @@ 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 cbb3fb1820ce..ace6a10a242f 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -836,6 +836,10 @@ 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.l1d.size;
limit = min(safe_stack_limit(), ppc64_rma_size);
@@ -853,7 +857,7 @@ 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:[~2018-05-26 4:27 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-26 4:27 [PATCH stable 4.14 v2 00/23] powerpc backports for 4.14 Michael Ellerman
2018-05-26 4:27 ` [PATCH stable 4.14 v2 01/23] powerpc/64s: Improve RFI L1-D cache flush fallback Michael Ellerman
2018-05-27 13:49 ` Patch "powerpc/64s: Improve RFI L1-D cache flush fallback" has been added to the 4.14-stable tree gregkh
2018-05-26 4:27 ` [PATCH stable 4.14 v2 02/23] powerpc/pseries: Support firmware disable of RFI flush Michael Ellerman
2018-05-27 13:49 ` Patch "powerpc/pseries: Support firmware disable of RFI flush" has been added to the 4.14-stable tree gregkh
2018-05-26 4:27 ` [PATCH stable 4.14 v2 03/23] powerpc/powernv: Support firmware disable of RFI flush Michael Ellerman
2018-05-27 13:49 ` Patch "powerpc/powernv: Support firmware disable of RFI flush" has been added to the 4.14-stable tree gregkh
2018-05-26 4:27 ` [PATCH stable 4.14 v2 04/23] powerpc/rfi-flush: Move the logic to avoid a redo into the debugfs code Michael Ellerman
2018-05-27 13:49 ` Patch "powerpc/rfi-flush: Move the logic to avoid a redo into the debugfs code" has been added to the 4.14-stable tree gregkh
2018-05-26 4:27 ` Michael Ellerman [this message]
2018-05-27 13:49 ` Patch "powerpc/rfi-flush: Make it possible to call setup_rfi_flush() again" " gregkh
2018-05-26 4:27 ` [PATCH stable 4.14 v2 06/23] powerpc/rfi-flush: Always enable fallback flush on pseries Michael Ellerman
2018-05-27 13:49 ` Patch "powerpc/rfi-flush: Always enable fallback flush on pseries" has been added to the 4.14-stable tree gregkh
2018-05-26 4:27 ` [PATCH stable 4.14 v2 07/23] powerpc/rfi-flush: Differentiate enabled and patched flush types Michael Ellerman
2018-05-27 13:49 ` Patch "powerpc/rfi-flush: Differentiate enabled and patched flush types" has been added to the 4.14-stable tree gregkh
2018-05-26 4:27 ` [PATCH stable 4.14 v2 08/23] powerpc/rfi-flush: Call setup_rfi_flush() after LPM migration Michael Ellerman
2018-05-27 13:49 ` Patch "powerpc/rfi-flush: Call setup_rfi_flush() after LPM migration" has been added to the 4.14-stable tree gregkh
2018-05-26 4:27 ` [PATCH stable 4.14 v2 09/23] powerpc/pseries: Add new H_GET_CPU_CHARACTERISTICS flags Michael Ellerman
2018-05-27 13:49 ` Patch "powerpc/pseries: Add new H_GET_CPU_CHARACTERISTICS flags" has been added to the 4.14-stable tree gregkh
2018-05-26 4:27 ` [PATCH stable 4.14 v2 10/23] powerpc: Add security feature flags for Spectre/Meltdown Michael Ellerman
2018-05-27 13:49 ` Patch "powerpc: Add security feature flags for Spectre/Meltdown" has been added to the 4.14-stable tree gregkh
2018-05-26 4:27 ` [PATCH stable 4.14 v2 11/23] powerpc/pseries: Set or clear security feature flags Michael Ellerman
2018-05-27 13:49 ` Patch "powerpc/pseries: Set or clear security feature flags" has been added to the 4.14-stable tree gregkh
2018-05-26 4:27 ` [PATCH stable 4.14 v2 12/23] powerpc/powernv: Set or clear security feature flags Michael Ellerman
2018-05-27 13:49 ` Patch "powerpc/powernv: Set or clear security feature flags" has been added to the 4.14-stable tree gregkh
2018-05-26 4:27 ` [PATCH stable 4.14 v2 13/23] powerpc/64s: Move cpu_show_meltdown() Michael Ellerman
2018-05-27 13:49 ` Patch "powerpc/64s: Move cpu_show_meltdown()" has been added to the 4.14-stable tree gregkh
2018-05-26 4:27 ` [PATCH stable 4.14 v2 14/23] powerpc/64s: Enhance the information in cpu_show_meltdown() Michael Ellerman
2018-05-27 13:49 ` Patch "powerpc/64s: Enhance the information in cpu_show_meltdown()" has been added to the 4.14-stable tree gregkh
2018-05-26 4:27 ` [PATCH stable 4.14 v2 15/23] powerpc/powernv: Use the security flags in pnv_setup_rfi_flush() Michael Ellerman
2018-05-27 13:49 ` Patch "powerpc/powernv: Use the security flags in pnv_setup_rfi_flush()" has been added to the 4.14-stable tree gregkh
2018-05-26 4:27 ` [PATCH stable 4.14 v2 16/23] powerpc/pseries: Use the security flags in pseries_setup_rfi_flush() Michael Ellerman
2018-05-27 13:49 ` Patch "powerpc/pseries: Use the security flags in pseries_setup_rfi_flush()" has been added to the 4.14-stable tree gregkh
2018-05-26 4:27 ` [PATCH stable 4.14 v2 17/23] powerpc/64s: Wire up cpu_show_spectre_v1() Michael Ellerman
2018-05-27 13:49 ` Patch "powerpc/64s: Wire up cpu_show_spectre_v1()" has been added to the 4.14-stable tree gregkh
2018-05-26 4:27 ` [PATCH stable 4.14 v2 18/23] powerpc/64s: Wire up cpu_show_spectre_v2() Michael Ellerman
2018-05-27 13:49 ` Patch "powerpc/64s: Wire up cpu_show_spectre_v2()" has been added to the 4.14-stable tree gregkh
2018-05-26 4:27 ` [PATCH stable 4.14 v2 19/23] powerpc/pseries: Fix clearing of security feature flags Michael Ellerman
2018-05-27 13:49 ` Patch "powerpc/pseries: Fix clearing of security feature flags" has been added to the 4.14-stable tree gregkh
2018-05-26 4:27 ` [PATCH stable 4.14 v2 20/23] powerpc: Move default security feature flags Michael Ellerman
2018-05-27 13:49 ` Patch "powerpc: Move default security feature flags" has been added to the 4.14-stable tree gregkh
2018-05-26 4:27 ` [PATCH stable 4.14 v2 21/23] powerpc/pseries: Restore default security feature flags on setup Michael Ellerman
2018-05-27 13:49 ` Patch "powerpc/pseries: Restore default security feature flags on setup" has been added to the 4.14-stable tree gregkh
2018-05-26 4:27 ` [PATCH stable 4.14 v2 22/23] powerpc/64s: Fix section mismatch warnings from setup_rfi_flush() Michael Ellerman
2018-05-27 13:49 ` Patch "powerpc/64s: Fix section mismatch warnings from setup_rfi_flush()" has been added to the 4.14-stable tree gregkh
2018-05-26 4:27 ` [PATCH stable 4.14 v2 23/23] powerpc/64s: Add support for a store forwarding barrier at kernel entry/exit Michael Ellerman
2018-05-27 13:49 ` Patch "powerpc/64s: Add support for a store forwarding barrier at kernel entry/exit" has been added to the 4.14-stable tree gregkh
2018-05-27 13:50 ` [PATCH stable 4.14 v2 00/23] powerpc backports for 4.14 Greg KH
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