From ff00552578ba30e2e1625fb559b43f8d082b6522 Mon Sep 17 00:00:00 2001 From: Christophe Leroy Date: Tue, 9 Oct 2018 13:52:18 +0000 Subject: [PATCH] powerpc/8xx: change name of a few page flags to avoid confusion _PAGE_PRIVILEGED corresponds to the SH bit which doesn't protect against user access but only disables ASID verification on kernel accesses. User access is controlled with _PMD_USER flag. Name it _PAGE_SH instead of _PAGE_PRIVILEGED _PAGE_HUGE corresponds to the SPS bit which doesn't really tells that's it is a huge page but only that it is not a 4k page. Name it _PAGE_SPS instead of _PAGE_HUGE Reviewed-by: Aneesh Kumar K.V Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman --- arch/powerpc/include/asm/nohash/32/pte-8xx.h | 28 ++++++++++---------- arch/powerpc/kernel/head_8xx.S | 6 ++--- arch/powerpc/mm/8xx_mmu.c | 2 +- arch/powerpc/mm/dump_linuxpagetables-8xx.c | 2 +- 4 files changed, 19 insertions(+), 19 deletions(-) diff --git a/arch/powerpc/include/asm/nohash/32/pte-8xx.h b/arch/powerpc/include/asm/nohash/32/pte-8xx.h index 2b4669b3badb..1c57efac089d 100644 --- a/arch/powerpc/include/asm/nohash/32/pte-8xx.h +++ b/arch/powerpc/include/asm/nohash/32/pte-8xx.h @@ -29,10 +29,10 @@ */ /* Definitions for 8xx embedded chips. */ -#define _PAGE_PRESENT 0x0001 /* Page is valid */ -#define _PAGE_NO_CACHE 0x0002 /* I: cache inhibit */ -#define _PAGE_PRIVILEGED 0x0004 /* No ASID (context) compare */ -#define _PAGE_HUGE 0x0008 /* SPS: Small Page Size (1 if 16k, 512k or 8M)*/ +#define _PAGE_PRESENT 0x0001 /* V: Page is valid */ +#define _PAGE_NO_CACHE 0x0002 /* CI: cache inhibit */ +#define _PAGE_SH 0x0004 /* SH: No ASID (context) compare */ +#define _PAGE_SPS 0x0008 /* SPS: Small Page Size (1 if 16k, 512k or 8M)*/ #define _PAGE_DIRTY 0x0100 /* C: page changed */ /* These 4 software bits must be masked out when the L2 entry is loaded @@ -50,15 +50,15 @@ #define _PAGE_COHERENT 0 #define _PAGE_WRITETHRU 0 -#define _PAGE_KERNEL_RO (_PAGE_PRIVILEGED | _PAGE_RO) -#define _PAGE_KERNEL_ROX (_PAGE_PRIVILEGED | _PAGE_RO | _PAGE_EXEC) -#define _PAGE_KERNEL_RW (_PAGE_PRIVILEGED | _PAGE_DIRTY) -#define _PAGE_KERNEL_RWX (_PAGE_PRIVILEGED | _PAGE_DIRTY | _PAGE_EXEC) +#define _PAGE_KERNEL_RO (_PAGE_SH | _PAGE_RO) +#define _PAGE_KERNEL_ROX (_PAGE_SH | _PAGE_RO | _PAGE_EXEC) +#define _PAGE_KERNEL_RW (_PAGE_SH | _PAGE_DIRTY) +#define _PAGE_KERNEL_RWX (_PAGE_SH | _PAGE_DIRTY | _PAGE_EXEC) /* Mask of bits returned by pte_pgprot() */ #define PAGE_PROT_BITS (_PAGE_GUARDED | _PAGE_NO_CACHE | \ _PAGE_ACCESSED | _PAGE_RO | _PAGE_NA | \ - _PAGE_PRIVILEGED | _PAGE_DIRTY | _PAGE_EXEC) + _PAGE_SH | _PAGE_DIRTY | _PAGE_EXEC) #define _PMD_PRESENT 0x0001 #define _PMD_PRESENT_MASK _PMD_PRESENT @@ -74,7 +74,7 @@ #define PTE_ATOMIC_UPDATES 1 #ifdef CONFIG_PPC_16K_PAGES -#define _PAGE_PSIZE _PAGE_HUGE +#define _PAGE_PSIZE _PAGE_SPS #else #define _PAGE_PSIZE 0 #endif @@ -115,28 +115,28 @@ static inline pte_t pte_mkwrite(pte_t pte) static inline bool pte_user(pte_t pte) { - return !(pte_val(pte) & _PAGE_PRIVILEGED); + return !(pte_val(pte) & _PAGE_SH); } #define pte_user pte_user static inline pte_t pte_mkprivileged(pte_t pte) { - return __pte(pte_val(pte) | _PAGE_PRIVILEGED); + return __pte(pte_val(pte) | _PAGE_SH); } #define pte_mkprivileged pte_mkprivileged static inline pte_t pte_mkuser(pte_t pte) { - return __pte(pte_val(pte) & ~_PAGE_PRIVILEGED); + return __pte(pte_val(pte) & ~_PAGE_SH); } #define pte_mkuser pte_mkuser static inline pte_t pte_mkhuge(pte_t pte) { - return __pte(pte_val(pte) | _PAGE_HUGE); + return __pte(pte_val(pte) | _PAGE_SPS); } #define pte_mkhuge pte_mkhuge diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S index 6582f824d620..134a573a9f2d 100644 --- a/arch/powerpc/kernel/head_8xx.S +++ b/arch/powerpc/kernel/head_8xx.S @@ -642,7 +642,7 @@ DTLBMissIMMR: mtspr SPRN_MD_TWC, r10 mfspr r10, SPRN_IMMR /* Get current IMMR */ rlwinm r10, r10, 0, 0xfff80000 /* Get 512 kbytes boundary */ - ori r10, r10, 0xf0 | MD_SPS16K | _PAGE_PRIVILEGED | _PAGE_DIRTY | \ + ori r10, r10, 0xf0 | MD_SPS16K | _PAGE_SH | _PAGE_DIRTY | \ _PAGE_PRESENT | _PAGE_NO_CACHE mtspr SPRN_MD_RPN, r10 /* Update TLB entry */ @@ -660,7 +660,7 @@ DTLBMissLinear: li r11, MD_PS8MEG | MD_SVALID | M_APG2 mtspr SPRN_MD_TWC, r11 rlwinm r10, r10, 0, 0x0f800000 /* 8xx supports max 256Mb RAM */ - ori r10, r10, 0xf0 | MD_SPS16K | _PAGE_PRIVILEGED | _PAGE_DIRTY | \ + ori r10, r10, 0xf0 | MD_SPS16K | _PAGE_SH | _PAGE_DIRTY | \ _PAGE_PRESENT mtspr SPRN_MD_RPN, r10 /* Update TLB entry */ @@ -679,7 +679,7 @@ ITLBMissLinear: li r11, MI_PS8MEG | MI_SVALID | M_APG2 mtspr SPRN_MI_TWC, r11 rlwinm r10, r10, 0, 0x0f800000 /* 8xx supports max 256Mb RAM */ - ori r10, r10, 0xf0 | MI_SPS16K | _PAGE_PRIVILEGED | _PAGE_DIRTY | \ + ori r10, r10, 0xf0 | MI_SPS16K | _PAGE_SH | _PAGE_DIRTY | \ _PAGE_PRESENT mtspr SPRN_MI_RPN, r10 /* Update TLB entry */ diff --git a/arch/powerpc/mm/8xx_mmu.c b/arch/powerpc/mm/8xx_mmu.c index 9137361d687d..36484a2ef915 100644 --- a/arch/powerpc/mm/8xx_mmu.c +++ b/arch/powerpc/mm/8xx_mmu.c @@ -67,7 +67,7 @@ void __init MMU_init_hw(void) /* PIN up to the 3 first 8Mb after IMMR in DTLB table */ #ifdef CONFIG_PIN_TLB_DATA unsigned long ctr = mfspr(SPRN_MD_CTR) & 0xfe000000; - unsigned long flags = 0xf0 | MD_SPS16K | _PAGE_PRIVILEGED | _PAGE_DIRTY; + unsigned long flags = 0xf0 | MD_SPS16K | _PAGE_SH | _PAGE_DIRTY; #ifdef CONFIG_PIN_TLB_IMMR int i = 29; #else diff --git a/arch/powerpc/mm/dump_linuxpagetables-8xx.c b/arch/powerpc/mm/dump_linuxpagetables-8xx.c index 33f52a97975b..ab9e3f24db2f 100644 --- a/arch/powerpc/mm/dump_linuxpagetables-8xx.c +++ b/arch/powerpc/mm/dump_linuxpagetables-8xx.c @@ -11,7 +11,7 @@ static const struct flag_info flag_array[] = { { - .mask = _PAGE_PRIVILEGED, + .mask = _PAGE_SH, .val = 0, .set = "user", .clear = " ", -- 2.30.2