linuxppc-dev.lists.ozlabs.org archive mirror
 help / color / mirror / Atom feed
From: "Christopher M. Riedl" <cmr@linux.ibm.com>
To: linuxppc-dev@lists.ozlabs.org
Cc: tglx@linutronix.de, x86@kernel.org,
	linux-hardening@vger.kernel.org, keescook@chromium.org
Subject: [RESEND PATCH v4 07/11] powerpc/64s: Make slb_allocate_user() non-static
Date: Wed,  5 May 2021 23:34:48 -0500	[thread overview]
Message-ID: <20210506043452.9674-8-cmr@linux.ibm.com> (raw)
In-Reply-To: <20210506043452.9674-1-cmr@linux.ibm.com>

With Book3s64 Hash translation, manually inserting a PTE requires
updating the Linux PTE, inserting a SLB entry, and inserting the hashed
page. The first is handled via the usual kernel abstractions, the second
requires slb_allocate_user() which is currently 'static', and the third
is available via hash_page_mm() already.

Make slb_allocate_user() non-static and add a prototype so the next
patch can use it during code-patching.

Signed-off-by: Christopher M. Riedl <cmr@linux.ibm.com>

---

v4:  * New to series.
---
 arch/powerpc/include/asm/book3s/64/mmu-hash.h | 1 +
 arch/powerpc/mm/book3s64/slb.c                | 4 +---
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/arch/powerpc/include/asm/book3s/64/mmu-hash.h b/arch/powerpc/include/asm/book3s/64/mmu-hash.h
index 3004f3323144d..189854eebba77 100644
--- a/arch/powerpc/include/asm/book3s/64/mmu-hash.h
+++ b/arch/powerpc/include/asm/book3s/64/mmu-hash.h
@@ -525,6 +525,7 @@ void slb_dump_contents(struct slb_entry *slb_ptr);
 extern void slb_vmalloc_update(void);
 extern void slb_set_size(u16 size);
 void preload_new_slb_context(unsigned long start, unsigned long sp);
+long slb_allocate_user(struct mm_struct *mm, unsigned long ea);
 #endif /* __ASSEMBLY__ */
 
 /*
diff --git a/arch/powerpc/mm/book3s64/slb.c b/arch/powerpc/mm/book3s64/slb.c
index da0836cb855af..532eb51bc5211 100644
--- a/arch/powerpc/mm/book3s64/slb.c
+++ b/arch/powerpc/mm/book3s64/slb.c
@@ -29,8 +29,6 @@
 #include "internal.h"
 
 
-static long slb_allocate_user(struct mm_struct *mm, unsigned long ea);
-
 bool stress_slb_enabled __initdata;
 
 static int __init parse_stress_slb(char *p)
@@ -791,7 +789,7 @@ static long slb_allocate_kernel(unsigned long ea, unsigned long id)
 	return slb_insert_entry(ea, context, flags, ssize, true);
 }
 
-static long slb_allocate_user(struct mm_struct *mm, unsigned long ea)
+long slb_allocate_user(struct mm_struct *mm, unsigned long ea)
 {
 	unsigned long context;
 	unsigned long flags;
-- 
2.26.1


  parent reply	other threads:[~2021-05-06  4:39 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-06  4:34 [RESEND PATCH v4 00/11] Use per-CPU temporary mappings for patching Christopher M. Riedl
2021-05-06  4:34 ` [RESEND PATCH v4 01/11] powerpc: Add LKDTM accessor for patching addr Christopher M. Riedl
2021-05-06  4:34 ` [RESEND PATCH v4 02/11] lkdtm/powerpc: Add test to hijack a patch mapping Christopher M. Riedl
2021-05-06  4:34 ` [RESEND PATCH v4 03/11] x86_64: Add LKDTM accessor for patching addr Christopher M. Riedl
2021-05-06  4:34 ` [RESEND PATCH v4 04/11] lkdtm/x86_64: Add test to hijack a patch mapping Christopher M. Riedl
2021-05-06  4:34 ` [RESEND PATCH v4 05/11] powerpc/64s: Add ability to skip SLB preload Christopher M. Riedl
2021-06-21  3:13   ` Daniel Axtens
2021-07-01  3:48     ` Christopher M. Riedl
2021-07-01  4:15       ` Nicholas Piggin
2021-07-01  5:28         ` Christopher M. Riedl
2021-07-01  6:04           ` Nicholas Piggin
2021-07-01  6:53             ` Christopher M. Riedl
2021-07-01  7:37               ` Nicholas Piggin
2021-07-01 11:30                 ` Nicholas Piggin
2021-07-09  4:55                 ` Christopher M. Riedl
2021-05-06  4:34 ` [RESEND PATCH v4 06/11] powerpc: Introduce temporary mm Christopher M. Riedl
2021-05-06  4:34 ` Christopher M. Riedl [this message]
2021-05-06  4:34 ` [RESEND PATCH v4 08/11] powerpc: Initialize and use a temporary mm for patching Christopher M. Riedl
2021-06-21  3:19   ` Daniel Axtens
2021-07-01  5:11     ` Christopher M. Riedl
2021-07-01  6:12   ` Nicholas Piggin
2021-07-01  7:02     ` Christopher M. Riedl
2021-07-01  7:51       ` Nicholas Piggin
2021-07-09  5:03         ` Christopher M. Riedl
2021-05-06  4:34 ` [RESEND PATCH v4 09/11] lkdtm/powerpc: Fix code patching hijack test Christopher M. Riedl
2021-05-06  4:34 ` [RESEND PATCH v4 10/11] powerpc: Protect patching_mm with a lock Christopher M. Riedl
2021-05-06 10:51   ` Peter Zijlstra
2021-05-07 20:03     ` Christopher M. Riedl
2021-05-07 22:26       ` Peter Zijlstra
2021-05-06  4:34 ` [RESEND PATCH v4 11/11] powerpc: Use patch_instruction_unlocked() in loops Christopher M. Riedl

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=20210506043452.9674-8-cmr@linux.ibm.com \
    --to=cmr@linux.ibm.com \
    --cc=keescook@chromium.org \
    --cc=linux-hardening@vger.kernel.org \
    --cc=linuxppc-dev@lists.ozlabs.org \
    --cc=tglx@linutronix.de \
    --cc=x86@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).