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[203.221.156.192]) by smtp.gmail.com with ESMTPSA id a24sm20877337pff.18.2021.02.01.19.03.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 01 Feb 2021 19:03:37 -0800 (PST) From: Nicholas Piggin To: kvm-ppc@vger.kernel.org Subject: [RFC PATCH 5/9] powerpc/64s: Remove EXSLB interrupt save area Date: Tue, 2 Feb 2021 13:03:09 +1000 Message-Id: <20210202030313.3509446-6-npiggin@gmail.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20210202030313.3509446-1-npiggin@gmail.com> References: <20210202030313.3509446-1-npiggin@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linuxppc-dev@lists.ozlabs.org, Nicholas Piggin Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" SLB faults should not be taken while the PACA save areas are live, so EXSLB is not be required. Signed-off-by: Nicholas Piggin --- arch/powerpc/include/asm/paca.h | 3 +-- arch/powerpc/kernel/asm-offsets.c | 1 - arch/powerpc/kernel/exceptions-64s.S | 5 ----- 3 files changed, 1 insertion(+), 8 deletions(-) diff --git a/arch/powerpc/include/asm/paca.h b/arch/powerpc/include/asm/paca.h index 9454d29ff4b4..be0b00cb9fbb 100644 --- a/arch/powerpc/include/asm/paca.h +++ b/arch/powerpc/include/asm/paca.h @@ -108,8 +108,7 @@ struct paca_struct { */ /* used for most interrupts/exceptions */ u64 exgen[EX_SIZE] __attribute__((aligned(0x80))); - u64 exslb[EX_SIZE]; /* used for SLB/segment table misses - * on the linear mapping */ + /* SLB related definitions */ u16 vmalloc_sllp; u8 slb_cache_ptr; diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c index 489a22cf1a92..51302fb74d14 100644 --- a/arch/powerpc/kernel/asm-offsets.c +++ b/arch/powerpc/kernel/asm-offsets.c @@ -255,7 +255,6 @@ int main(void) #endif /* CONFIG_PPC_MM_SLICES */ OFFSET(PACA_EXGEN, paca_struct, exgen); OFFSET(PACA_EXMC, paca_struct, exmc); - OFFSET(PACA_EXSLB, paca_struct, exslb); OFFSET(PACA_EXNMI, paca_struct, exnmi); #ifdef CONFIG_PPC_PSERIES OFFSET(PACALPPACAPTR, paca_struct, lppaca_ptr); diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S index e964ea5149e8..c893801eb1d5 100644 --- a/arch/powerpc/kernel/exceptions-64s.S +++ b/arch/powerpc/kernel/exceptions-64s.S @@ -1412,13 +1412,9 @@ ALT_MMU_FTR_SECTION_END_IFCLR(MMU_FTR_TYPE_RADIX) * on user-handler data structures. * * KVM: Same as 0x300, DSLB must test for KVM guest. - * - * A dedicated save area EXSLB is used (XXX: but it actually need not be - * these days, we could use EXGEN). */ INT_DEFINE_BEGIN(data_access_slb) IVEC=0x380 - IAREA=PACA_EXSLB IRECONCILE=0 IDAR=1 IKVM_REAL=1 @@ -1507,7 +1503,6 @@ ALT_MMU_FTR_SECTION_END_IFCLR(MMU_FTR_TYPE_RADIX) */ INT_DEFINE_BEGIN(instruction_access_slb) IVEC=0x480 - IAREA=PACA_EXSLB IRECONCILE=0 IISIDE=1 IDAR=1 -- 2.23.0 From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nicholas Piggin Date: Tue, 02 Feb 2021 03:03:09 +0000 Subject: [RFC PATCH 5/9] powerpc/64s: Remove EXSLB interrupt save area Message-Id: <20210202030313.3509446-6-npiggin@gmail.com> List-Id: References: <20210202030313.3509446-1-npiggin@gmail.com> In-Reply-To: <20210202030313.3509446-1-npiggin@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: kvm-ppc@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org, Nicholas Piggin SLB faults should not be taken while the PACA save areas are live, so EXSLB is not be required. Signed-off-by: Nicholas Piggin --- arch/powerpc/include/asm/paca.h | 3 +-- arch/powerpc/kernel/asm-offsets.c | 1 - arch/powerpc/kernel/exceptions-64s.S | 5 ----- 3 files changed, 1 insertion(+), 8 deletions(-) diff --git a/arch/powerpc/include/asm/paca.h b/arch/powerpc/include/asm/paca.h index 9454d29ff4b4..be0b00cb9fbb 100644 --- a/arch/powerpc/include/asm/paca.h +++ b/arch/powerpc/include/asm/paca.h @@ -108,8 +108,7 @@ struct paca_struct { */ /* used for most interrupts/exceptions */ u64 exgen[EX_SIZE] __attribute__((aligned(0x80))); - u64 exslb[EX_SIZE]; /* used for SLB/segment table misses - * on the linear mapping */ + /* SLB related definitions */ u16 vmalloc_sllp; u8 slb_cache_ptr; diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c index 489a22cf1a92..51302fb74d14 100644 --- a/arch/powerpc/kernel/asm-offsets.c +++ b/arch/powerpc/kernel/asm-offsets.c @@ -255,7 +255,6 @@ int main(void) #endif /* CONFIG_PPC_MM_SLICES */ OFFSET(PACA_EXGEN, paca_struct, exgen); OFFSET(PACA_EXMC, paca_struct, exmc); - OFFSET(PACA_EXSLB, paca_struct, exslb); OFFSET(PACA_EXNMI, paca_struct, exnmi); #ifdef CONFIG_PPC_PSERIES OFFSET(PACALPPACAPTR, paca_struct, lppaca_ptr); diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S index e964ea5149e8..c893801eb1d5 100644 --- a/arch/powerpc/kernel/exceptions-64s.S +++ b/arch/powerpc/kernel/exceptions-64s.S @@ -1412,13 +1412,9 @@ ALT_MMU_FTR_SECTION_END_IFCLR(MMU_FTR_TYPE_RADIX) * on user-handler data structures. * * KVM: Same as 0x300, DSLB must test for KVM guest. - * - * A dedicated save area EXSLB is used (XXX: but it actually need not be - * these days, we could use EXGEN). */ INT_DEFINE_BEGIN(data_access_slb) IVEC=0x380 - IAREA=PACA_EXSLB IRECONCILE=0 IDAR=1 IKVM_REAL=1 @@ -1507,7 +1503,6 @@ ALT_MMU_FTR_SECTION_END_IFCLR(MMU_FTR_TYPE_RADIX) */ INT_DEFINE_BEGIN(instruction_access_slb) IVEC=0x480 - IAREA=PACA_EXSLB IRECONCILE=0 IISIDE=1 IDAR=1 -- 2.23.0