From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>, dja@axtens.net
Subject: [PATCH 4.9 02/16] powerpc/64s: move some exception handlers out of line
Date: Fri, 20 Nov 2020 12:03:07 +0100 [thread overview]
Message-ID: <20201120104539.835892188@linuxfoundation.org> (raw)
In-Reply-To: <20201120104539.706905067@linuxfoundation.org>
From: Daniel Axtens <dja@axtens.net>
(backport only)
We're about to grow the exception handlers, which will make a bunch of them
no longer fit within the space available. We move them out of line.
This is a fiddly and error-prone business, so in the interests of reviewability
I haven't merged this in with the addition of the entry flush.
Signed-off-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/powerpc/kernel/exceptions-64s.S | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
--- a/arch/powerpc/kernel/exceptions-64s.S
+++ b/arch/powerpc/kernel/exceptions-64s.S
@@ -519,6 +519,10 @@ ALT_MMU_FTR_SECTION_END_IFCLR(MMU_FTR_TY
EXC_REAL_BEGIN(data_access_slb, 0x380, 0x400)
SET_SCRATCH0(r13)
EXCEPTION_PROLOG_0(PACA_EXSLB)
+ b tramp_data_access_slb
+EXC_REAL_END(data_access_slb, 0x380, 0x400)
+
+TRAMP_REAL_BEGIN(tramp_data_access_slb)
EXCEPTION_PROLOG_1(PACA_EXSLB, KVMTEST_PR, 0x380)
std r3,PACA_EXSLB+EX_R3(r13)
mfspr r3,SPRN_DAR
@@ -537,7 +541,6 @@ EXC_REAL_BEGIN(data_access_slb, 0x380, 0
mtctr r10
bctr
#endif
-EXC_REAL_END(data_access_slb, 0x380, 0x400)
EXC_VIRT_BEGIN(data_access_slb, 0x4380, 0x4400)
SET_SCRATCH0(r13)
@@ -587,6 +590,10 @@ ALT_MMU_FTR_SECTION_END_IFCLR(MMU_FTR_TY
EXC_REAL_BEGIN(instruction_access_slb, 0x480, 0x500)
SET_SCRATCH0(r13)
EXCEPTION_PROLOG_0(PACA_EXSLB)
+ b tramp_instruction_access_slb
+EXC_REAL_END(instruction_access_slb, 0x480, 0x500)
+
+TRAMP_REAL_BEGIN(tramp_instruction_access_slb)
EXCEPTION_PROLOG_1(PACA_EXSLB, KVMTEST_PR, 0x480)
std r3,PACA_EXSLB+EX_R3(r13)
mfspr r3,SPRN_SRR0 /* SRR0 is faulting address */
@@ -600,7 +607,6 @@ EXC_REAL_BEGIN(instruction_access_slb, 0
mtctr r10
bctr
#endif
-EXC_REAL_END(instruction_access_slb, 0x480, 0x500)
EXC_VIRT_BEGIN(instruction_access_slb, 0x4480, 0x4500)
SET_SCRATCH0(r13)
next prev parent reply other threads:[~2020-11-20 11:04 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-20 11:03 [PATCH 4.9 00/16] 4.9.245-rc1 review Greg Kroah-Hartman
2020-11-20 11:03 ` [PATCH 4.9 01/16] powerpc/64s: Define MASKABLE_RELON_EXCEPTION_PSERIES_OOL Greg Kroah-Hartman
2020-11-20 11:03 ` Greg Kroah-Hartman [this message]
2020-11-20 11:03 ` [PATCH 4.9 03/16] powerpc/64s: flush L1D on kernel entry Greg Kroah-Hartman
2020-11-20 11:03 ` [PATCH 4.9 04/16] powerpc: Add a framework for user access tracking Greg Kroah-Hartman
2020-11-20 11:03 ` [PATCH 4.9 05/16] powerpc: Implement user_access_begin and friends Greg Kroah-Hartman
2020-11-20 11:03 ` [PATCH 4.9 06/16] powerpc: Fix __clear_user() with KUAP enabled Greg Kroah-Hartman
2020-11-20 11:03 ` [PATCH 4.9 07/16] powerpc/uaccess: Evaluate macro arguments once, before user access is allowed Greg Kroah-Hartman
2020-11-20 11:03 ` [PATCH 4.9 08/16] powerpc/64s: flush L1D after user accesses Greg Kroah-Hartman
2020-11-20 11:03 ` [PATCH 4.9 09/16] i2c: imx: use clk notifier for rate changes Greg Kroah-Hartman
2020-11-20 11:03 ` [PATCH 4.9 10/16] i2c: imx: Fix external abort on interrupt in exit paths Greg Kroah-Hartman
2020-11-20 11:03 ` [PATCH 4.9 11/16] i2c: mux: pca954x: Add missing pca9546 definition to chip_desc Greg Kroah-Hartman
2020-11-20 11:03 ` [PATCH 4.9 12/16] powerpc/8xx: Always fault when _PAGE_ACCESSED is not set Greg Kroah-Hartman
2020-11-20 11:03 ` [PATCH 4.9 13/16] Input: sunkbd - avoid use-after-free in teardown paths Greg Kroah-Hartman
2020-11-20 11:03 ` [PATCH 4.9 14/16] mac80211: always wind down STA state Greg Kroah-Hartman
2020-11-20 11:03 ` [PATCH 4.9 15/16] KVM: x86: clflushopt should be treated as a no-op by emulation Greg Kroah-Hartman
2020-11-20 11:03 ` [PATCH 4.9 16/16] ACPI: GED: fix -Wformat Greg Kroah-Hartman
2020-11-20 22:39 ` [PATCH 4.9 00/16] 4.9.245-rc1 review Shuah Khan
2020-11-21 18:34 ` Guenter Roeck
2020-11-22 8:01 ` Greg Kroah-Hartman
2020-11-22 6:05 ` Naresh Kamboju
2020-11-22 6:09 ` Naresh Kamboju
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