From: Jason Yan <yanaijie@huawei.com> To: <mpe@ellerman.id.au>, <linuxppc-dev@lists.ozlabs.org>, <diana.craciun@nxp.com>, <christophe.leroy@c-s.fr>, <benh@kernel.crashing.org>, <paulus@samba.org>, <npiggin@gmail.com>, <keescook@chromium.org>, <kernel-hardening@lists.openwall.com> Cc: <linux-kernel@vger.kernel.org>, <wangkefeng.wang@huawei.com>, <yebin10@huawei.com>, <thunder.leizhen@huawei.com>, <jingxiangfeng@huawei.com>, <fanchengyang@huawei.com>, Jason Yan <yanaijie@huawei.com> Subject: [RFC PATCH 04/10] powerpc/fsl_booke/32: introduce create_tlb_entry() helper Date: Wed, 17 Jul 2019 16:06:15 +0800 [thread overview] Message-ID: <20190717080621.40424-5-yanaijie@huawei.com> (raw) In-Reply-To: <20190717080621.40424-1-yanaijie@huawei.com> Add a new helper create_tlb_entry() to create a tlb entry by the virtual and physical address. This is a preparation to support boot kernel at a randomized address. Signed-off-by: Jason Yan <yanaijie@huawei.com> Cc: Diana Craciun <diana.craciun@nxp.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Christophe Leroy <christophe.leroy@c-s.fr> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Kees Cook <keescook@chromium.org> --- arch/powerpc/kernel/head_fsl_booke.S | 30 ++++++++++++++++++++++++++++ arch/powerpc/mm/mmu_decl.h | 1 + 2 files changed, 31 insertions(+) diff --git a/arch/powerpc/kernel/head_fsl_booke.S b/arch/powerpc/kernel/head_fsl_booke.S index adf0505dbe02..a57d44638031 100644 --- a/arch/powerpc/kernel/head_fsl_booke.S +++ b/arch/powerpc/kernel/head_fsl_booke.S @@ -1114,6 +1114,36 @@ __secondary_hold_acknowledge: .long -1 #endif +/* + * Create a 64M tlb by address and entry + * r3/r4 - physical address + * r5 - virtual address + * r6 - entry + */ +_GLOBAL(create_tlb_entry) + lis r7,0x1000 /* Set MAS0(TLBSEL) = 1 */ + rlwimi r7,r6,16,4,15 /* Setup MAS0 = TLBSEL | ESEL(r6) */ + mtspr SPRN_MAS0,r7 /* Write MAS0 */ + + lis r6,(MAS1_VALID|MAS1_IPROT)@h + ori r6,r6,(MAS1_TSIZE(BOOK3E_PAGESZ_64M))@l + mtspr SPRN_MAS1,r6 /* Write MAS1 */ + + lis r6,MAS2_EPN_MASK(BOOK3E_PAGESZ_64M)@h + ori r6,r6,MAS2_EPN_MASK(BOOK3E_PAGESZ_64M)@l + and r6,r6,r5 + ori r6,r6,MAS2_M@l + mtspr SPRN_MAS2,r6 /* Write MAS2(EPN) */ + + mr r8,r4 + ori r8,r8,(MAS3_SW|MAS3_SR|MAS3_SX) + mtspr SPRN_MAS3,r8 /* Write MAS3(RPN) */ + + tlbwe /* Write TLB */ + isync + sync + blr + /* * Create a tlb entry with the same effective and physical address as * the tlb entry used by the current running code. But set the TS to 1. diff --git a/arch/powerpc/mm/mmu_decl.h b/arch/powerpc/mm/mmu_decl.h index 32c1a191c28a..d7737cf97cee 100644 --- a/arch/powerpc/mm/mmu_decl.h +++ b/arch/powerpc/mm/mmu_decl.h @@ -142,6 +142,7 @@ extern unsigned long calc_cam_sz(unsigned long ram, unsigned long virt, extern void adjust_total_lowmem(void); extern int switch_to_as1(void); extern void restore_to_as0(int esel, int offset, void *dt_ptr, int bootcpu); +extern void create_tlb_entry(phys_addr_t phys, unsigned long virt, int entry); #endif extern void loadcam_entry(unsigned int index); extern void loadcam_multi(int first_idx, int num, int tmp_idx); -- 2.17.2
WARNING: multiple messages have this Message-ID (diff)
From: Jason Yan <yanaijie@huawei.com> To: <mpe@ellerman.id.au>, <linuxppc-dev@lists.ozlabs.org>, <diana.craciun@nxp.com>, <christophe.leroy@c-s.fr>, <benh@kernel.crashing.org>, <paulus@samba.org>, <npiggin@gmail.com>, <keescook@chromium.org>, <kernel-hardening@lists.openwall.com> Cc: wangkefeng.wang@huawei.com, Jason Yan <yanaijie@huawei.com>, linux-kernel@vger.kernel.org, jingxiangfeng@huawei.com, thunder.leizhen@huawei.com, fanchengyang@huawei.com, yebin10@huawei.com Subject: [RFC PATCH 04/10] powerpc/fsl_booke/32: introduce create_tlb_entry() helper Date: Wed, 17 Jul 2019 16:06:15 +0800 [thread overview] Message-ID: <20190717080621.40424-5-yanaijie@huawei.com> (raw) In-Reply-To: <20190717080621.40424-1-yanaijie@huawei.com> Add a new helper create_tlb_entry() to create a tlb entry by the virtual and physical address. This is a preparation to support boot kernel at a randomized address. Signed-off-by: Jason Yan <yanaijie@huawei.com> Cc: Diana Craciun <diana.craciun@nxp.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Christophe Leroy <christophe.leroy@c-s.fr> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Kees Cook <keescook@chromium.org> --- arch/powerpc/kernel/head_fsl_booke.S | 30 ++++++++++++++++++++++++++++ arch/powerpc/mm/mmu_decl.h | 1 + 2 files changed, 31 insertions(+) diff --git a/arch/powerpc/kernel/head_fsl_booke.S b/arch/powerpc/kernel/head_fsl_booke.S index adf0505dbe02..a57d44638031 100644 --- a/arch/powerpc/kernel/head_fsl_booke.S +++ b/arch/powerpc/kernel/head_fsl_booke.S @@ -1114,6 +1114,36 @@ __secondary_hold_acknowledge: .long -1 #endif +/* + * Create a 64M tlb by address and entry + * r3/r4 - physical address + * r5 - virtual address + * r6 - entry + */ +_GLOBAL(create_tlb_entry) + lis r7,0x1000 /* Set MAS0(TLBSEL) = 1 */ + rlwimi r7,r6,16,4,15 /* Setup MAS0 = TLBSEL | ESEL(r6) */ + mtspr SPRN_MAS0,r7 /* Write MAS0 */ + + lis r6,(MAS1_VALID|MAS1_IPROT)@h + ori r6,r6,(MAS1_TSIZE(BOOK3E_PAGESZ_64M))@l + mtspr SPRN_MAS1,r6 /* Write MAS1 */ + + lis r6,MAS2_EPN_MASK(BOOK3E_PAGESZ_64M)@h + ori r6,r6,MAS2_EPN_MASK(BOOK3E_PAGESZ_64M)@l + and r6,r6,r5 + ori r6,r6,MAS2_M@l + mtspr SPRN_MAS2,r6 /* Write MAS2(EPN) */ + + mr r8,r4 + ori r8,r8,(MAS3_SW|MAS3_SR|MAS3_SX) + mtspr SPRN_MAS3,r8 /* Write MAS3(RPN) */ + + tlbwe /* Write TLB */ + isync + sync + blr + /* * Create a tlb entry with the same effective and physical address as * the tlb entry used by the current running code. But set the TS to 1. diff --git a/arch/powerpc/mm/mmu_decl.h b/arch/powerpc/mm/mmu_decl.h index 32c1a191c28a..d7737cf97cee 100644 --- a/arch/powerpc/mm/mmu_decl.h +++ b/arch/powerpc/mm/mmu_decl.h @@ -142,6 +142,7 @@ extern unsigned long calc_cam_sz(unsigned long ram, unsigned long virt, extern void adjust_total_lowmem(void); extern int switch_to_as1(void); extern void restore_to_as0(int esel, int offset, void *dt_ptr, int bootcpu); +extern void create_tlb_entry(phys_addr_t phys, unsigned long virt, int entry); #endif extern void loadcam_entry(unsigned int index); extern void loadcam_multi(int first_idx, int num, int tmp_idx); -- 2.17.2
next prev parent reply other threads:[~2019-07-17 7:50 UTC|newest] Thread overview: 77+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-07-17 8:06 [RFC PATCH 00/10] implement KASLR for powerpc/fsl_booke/32 Jason Yan 2019-07-17 8:06 ` Jason Yan 2019-07-17 8:06 ` [RFC PATCH 01/10] powerpc: unify definition of M_IF_NEEDED Jason Yan 2019-07-17 8:06 ` Jason Yan 2019-07-29 10:59 ` Christophe Leroy 2019-07-29 10:59 ` Christophe Leroy 2019-07-17 8:06 ` [RFC PATCH 02/10] powerpc: move memstart_addr and kernstart_addr to init-common.c Jason Yan 2019-07-17 8:06 ` Jason Yan 2019-07-29 11:00 ` Christophe Leroy 2019-07-29 11:00 ` Christophe Leroy 2019-07-29 14:31 ` Christoph Hellwig 2019-07-29 14:31 ` Christoph Hellwig 2019-07-30 0:47 ` Jason Yan 2019-07-30 0:47 ` Jason Yan 2019-07-17 8:06 ` [RFC PATCH 03/10] powerpc: introduce kimage_vaddr to store the kernel base Jason Yan 2019-07-17 8:06 ` Jason Yan 2019-07-29 11:00 ` Christophe Leroy 2019-07-29 11:00 ` Christophe Leroy 2019-07-29 14:32 ` Christoph Hellwig 2019-07-29 14:32 ` Christoph Hellwig 2019-07-17 8:06 ` Jason Yan [this message] 2019-07-17 8:06 ` [RFC PATCH 04/10] powerpc/fsl_booke/32: introduce create_tlb_entry() helper Jason Yan 2019-07-29 11:05 ` Christophe Leroy 2019-07-29 11:05 ` Christophe Leroy 2019-07-29 13:26 ` Jason Yan 2019-07-29 13:26 ` Jason Yan 2019-07-17 8:06 ` [RFC PATCH 05/10] powerpc/fsl_booke/32: introduce reloc_kernel_entry() helper Jason Yan 2019-07-17 8:06 ` Jason Yan 2019-07-29 11:08 ` Christophe Leroy 2019-07-29 11:08 ` Christophe Leroy 2019-07-29 13:35 ` Jason Yan 2019-07-29 13:35 ` Jason Yan 2019-07-17 8:06 ` [RFC PATCH 06/10] powerpc/fsl_booke/32: implement KASLR infrastructure Jason Yan 2019-07-17 8:06 ` Jason Yan 2019-07-29 11:16 ` Christophe Leroy 2019-07-29 11:16 ` Christophe Leroy 2019-07-17 8:06 ` [RFC PATCH 07/10] powerpc/fsl_booke/32: randomize the kernel image offset Jason Yan 2019-07-17 8:06 ` Jason Yan 2019-07-29 11:33 ` Christophe Leroy 2019-07-29 11:33 ` Christophe Leroy 2019-07-29 13:53 ` Jason Yan 2019-07-29 13:53 ` Jason Yan 2019-07-17 8:06 ` [RFC PATCH 08/10] powerpc/fsl_booke/kaslr: clear the original kernel if randomized Jason Yan 2019-07-17 8:06 ` Jason Yan 2019-07-29 11:19 ` Christophe Leroy 2019-07-29 11:19 ` Christophe Leroy 2019-07-29 13:43 ` Jason Yan 2019-07-29 13:43 ` Jason Yan 2019-07-17 8:06 ` [RFC PATCH 09/10] powerpc/fsl_booke/kaslr: support nokaslr cmdline parameter Jason Yan 2019-07-17 8:06 ` Jason Yan 2019-07-29 11:38 ` Christophe Leroy 2019-07-29 11:38 ` Christophe Leroy 2019-07-29 14:04 ` Jason Yan 2019-07-29 14:04 ` Jason Yan 2019-07-17 8:06 ` [RFC PATCH 10/10] powerpc/fsl_booke/kaslr: dump out kernel offset information on panic Jason Yan 2019-07-17 8:06 ` Jason Yan 2019-07-29 11:43 ` Christophe Leroy 2019-07-29 11:43 ` Christophe Leroy 2019-07-29 14:08 ` Jason Yan 2019-07-29 14:08 ` Jason Yan 2019-07-25 7:16 ` [RFC PATCH 00/10] implement KASLR for powerpc/fsl_booke/32 Jason Yan 2019-07-25 7:16 ` Jason Yan 2019-07-25 19:58 ` Kees Cook 2019-07-25 19:58 ` Kees Cook 2019-07-26 7:20 ` Jason Yan 2019-07-26 7:20 ` Jason Yan 2019-07-26 16:15 ` Kees Cook 2019-07-26 16:15 ` Kees Cook 2019-07-26 7:04 ` Diana Madalina Craciun 2019-07-26 7:04 ` Diana Madalina Craciun 2019-07-26 7:04 ` Diana Madalina Craciun 2019-07-26 7:26 ` Jason Yan 2019-07-26 7:26 ` Jason Yan 2019-07-26 7:26 ` Jason Yan 2019-07-29 14:30 ` Diana Madalina Craciun 2019-07-29 14:30 ` Diana Madalina Craciun 2019-07-29 14:30 ` Diana Madalina Craciun
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