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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH 1/3] xen: arm: clarify naming of the Xen TLB flushing functions
All of the flush_xen_*_tlb functions operate on the local processor only. Add
_local to the name and update the comments to clarify.
Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
---
v3: flush_xen_data_tlb_local_range_va => flush_xen_data_tlb_range_va_local
fixed missing subst in setup_pagetables
---
xen/arch/arm/mm.c | 24 ++++++++++++------------
xen/include/asm-arm/arm32/page.h | 21 +++++++++++++--------
xen/include/asm-arm/arm64/page.h | 20 ++++++++++++--------
3 files changed, 37 insertions(+), 28 deletions(-)
diff --git a/xen/arch/arm/mm.c b/xen/arch/arm/mm.c
index 3161d79..d523f77 100644
--- a/xen/arch/arm/mm.c
+++ b/xen/arch/arm/mm.c
@@ -215,7 +215,7 @@ void set_fixmap(unsigned map, unsigned long mfn, unsigned
attributes)
pte.pt.table = 1; /* 4k mappings always have this bit set */
pte.pt.xn = 1;
write_pte(xen_fixmap + third_table_offset(FIXMAP_ADDR(map)), pte);
- flush_xen_data_tlb_range_va(FIXMAP_ADDR(map), PAGE_SIZE);
+ flush_xen_data_tlb_range_va_local(FIXMAP_ADDR(map), PAGE_SIZE);
}
/* Remove a mapping from a fixmap entry */
@@ -223,7 +223,7 @@ void clear_fixmap(unsigned map)
{
lpae_t pte = {0};
write_pte(xen_fixmap + third_table_offset(FIXMAP_ADDR(map)), pte);
- flush_xen_data_tlb_range_va(FIXMAP_ADDR(map), PAGE_SIZE);
+ flush_xen_data_tlb_range_va_local(FIXMAP_ADDR(map), PAGE_SIZE);
}
#ifdef CONFIG_DOMAIN_PAGE
@@ -301,7 +301,7 @@ void *map_domain_page(unsigned long mfn)
* We may not have flushed this specific subpage at map time,
* since we only flush the 4k page not the superpage
*/
- flush_xen_data_tlb_range_va(va, PAGE_SIZE);
+ flush_xen_data_tlb_range_va_local(va, PAGE_SIZE);
return (void *)va;
}
@@ -403,7 +403,7 @@ void __init remove_early_mappings(void)
{
lpae_t pte = {0};
write_pte(xen_second + second_table_offset(BOOT_FDT_VIRT_START), pte);
- flush_xen_data_tlb_range_va(BOOT_FDT_VIRT_START, SECOND_SIZE);
+ flush_xen_data_tlb_range_va_local(BOOT_FDT_VIRT_START, SECOND_SIZE);
}
extern void relocate_xen(uint64_t ttbr, void *src, void *dst, size_t len);
@@ -421,7 +421,7 @@ void __init setup_pagetables(unsigned long
boot_phys_offset, paddr_t xen_paddr)
dest_va = BOOT_RELOC_VIRT_START;
pte = mfn_to_xen_entry(xen_paddr >> PAGE_SHIFT, WRITEALLOC);
write_pte(xen_second + second_table_offset(dest_va), pte);
- flush_xen_data_tlb_range_va(dest_va, SECOND_SIZE);
+ flush_xen_data_tlb_range_va_local(dest_va, SECOND_SIZE);
/* Calculate virt-to-phys offset for the new location */
phys_offset = xen_paddr - (unsigned long) _start;
@@ -473,7 +473,7 @@ void __init setup_pagetables(unsigned long
boot_phys_offset, paddr_t xen_paddr)
dest_va = BOOT_RELOC_VIRT_START;
pte = mfn_to_xen_entry(xen_paddr >> PAGE_SHIFT, WRITEALLOC);
write_pte(boot_second + second_table_offset(dest_va), pte);
- flush_xen_data_tlb_range_va(dest_va, SECOND_SIZE);
+ flush_xen_data_tlb_range_va_local(dest_va, SECOND_SIZE);
#ifdef CONFIG_ARM_64
ttbr = (uintptr_t) xen_pgtable + phys_offset;
#else
@@ -521,7 +521,7 @@ void __init setup_pagetables(unsigned long
boot_phys_offset, paddr_t xen_paddr)
/* From now on, no mapping may be both writable and executable. */
WRITE_SYSREG32(READ_SYSREG32(SCTLR_EL2) | SCTLR_WXN, SCTLR_EL2);
/* Flush everything after setting WXN bit. */
- flush_xen_text_tlb();
+ flush_xen_text_tlb_local();
#ifdef CONFIG_ARM_32
per_cpu(xen_pgtable, 0) = cpu0_pgtable;
@@ -594,7 +594,7 @@ void __cpuinit mmu_init_secondary_cpu(void)
{
/* From now on, no mapping may be both writable and executable. */
WRITE_SYSREG32(READ_SYSREG32(SCTLR_EL2) | SCTLR_WXN, SCTLR_EL2);
- flush_xen_text_tlb();
+ flush_xen_text_tlb_local();
}
/* Create Xen's mappings of memory.
@@ -622,7 +622,7 @@ static void __init create_32mb_mappings(lpae_t *second,
write_pte(p + i, pte);
pte.pt.base += 1 << LPAE_SHIFT;
}
- flush_xen_data_tlb();
+ flush_xen_data_tlb_local();
}
#ifdef CONFIG_ARM_32
@@ -701,7 +701,7 @@ void __init setup_xenheap_mappings(unsigned long base_mfn,
vaddr += FIRST_SIZE;
}
- flush_xen_data_tlb();
+ flush_xen_data_tlb_local();
}
#endif
@@ -845,7 +845,7 @@ static int create_xen_entries(enum xenmap_operation op,
BUG();
}
}
- flush_xen_data_tlb_range_va(virt, PAGE_SIZE * nr_mfns);
+ flush_xen_data_tlb_range_va_local(virt, PAGE_SIZE * nr_mfns);
rc = 0;
@@ -908,7 +908,7 @@ static void set_pte_flags_on_range(const char *p, unsigned
long l, enum mg mg)
}
write_pte(xen_xenmap + i, pte);
}
- flush_xen_text_tlb();
+ flush_xen_text_tlb_local();
}
/* Release all __init and __initdata ranges to be reused */
diff --git a/xen/include/asm-arm/arm32/page.h b/xen/include/asm-arm/arm32/page.h
index 191a108..b0a2025 100644
--- a/xen/include/asm-arm/arm32/page.h
+++ b/xen/include/asm-arm/arm32/page.h
@@ -27,13 +27,15 @@ static inline void write_pte(lpae_t *p, lpae_t pte)
#define __clean_and_invalidate_xen_dcache_one(R) STORE_CP32(R, DCCIMVAC)
/*
- * Flush all hypervisor mappings from the TLB and branch predictor.
+ * Flush all hypervisor mappings from the TLB and branch predictor of
+ * the local processor.
+ *
* This is needed after changing Xen code mappings.
*
* The caller needs to issue the necessary DSB and D-cache flushes
* before calling flush_xen_text_tlb.
*/
-static inline void flush_xen_text_tlb(void)
+static inline void flush_xen_text_tlb_local(void)
{
register unsigned long r0 asm ("r0");
asm volatile (
@@ -47,10 +49,11 @@ static inline void flush_xen_text_tlb(void)
}
/*
- * Flush all hypervisor mappings from the data TLB. This is not
- * sufficient when changing code mappings or for self modifying code.
+ * Flush all hypervisor mappings from the data TLB of the local
+ * processor. This is not sufficient when changing code mappings or
+ * for self modifying code.
*/
-static inline void flush_xen_data_tlb(void)
+static inline void flush_xen_data_tlb_local(void)
{
register unsigned long r0 asm ("r0");
asm volatile("dsb;" /* Ensure preceding are visible */
@@ -61,10 +64,12 @@ static inline void flush_xen_data_tlb(void)
}
/*
- * Flush a range of VA's hypervisor mappings from the data TLB. This is not
- * sufficient when changing code mappings or for self modifying code.
+ * Flush a range of VA's hypervisor mappings from the data TLB of the
+ * local processor. This is not sufficient when changing code mappings
+ * or for self modifying code.
*/
-static inline void flush_xen_data_tlb_range_va(unsigned long va, unsigned long
size)
+static inline void flush_xen_data_tlb_range_va_local(unsigned long va,
+ unsigned long size)
{
unsigned long end = va + size;
dsb(sy); /* Ensure preceding are visible */
diff --git a/xen/include/asm-arm/arm64/page.h b/xen/include/asm-arm/arm64/page.h
index 20b4c5a..65332a3 100644
--- a/xen/include/asm-arm/arm64/page.h
+++ b/xen/include/asm-arm/arm64/page.h
@@ -22,13 +22,14 @@ static inline void write_pte(lpae_t *p, lpae_t pte)
#define __clean_and_invalidate_xen_dcache_one(R) "dc civac, %" #R ";"
/*
- * Flush all hypervisor mappings from the TLB
+ * Flush all hypervisor mappings from the TLB of the local processor.
+ *
* This is needed after changing Xen code mappings.
*
* The caller needs to issue the necessary DSB and D-cache flushes
* before calling flush_xen_text_tlb.
*/
-static inline void flush_xen_text_tlb(void)
+static inline void flush_xen_text_tlb_local(void)
{
asm volatile (
"isb;" /* Ensure synchronization with previous changes to text */
@@ -40,10 +41,11 @@ static inline void flush_xen_text_tlb(void)
}
/*
- * Flush all hypervisor mappings from the data TLB. This is not
- * sufficient when changing code mappings or for self modifying code.
+ * Flush all hypervisor mappings from the data TLB of the local
+ * processor. This is not sufficient when changing code mappings or
+ * for self modifying code.
*/
-static inline void flush_xen_data_tlb(void)
+static inline void flush_xen_data_tlb_local(void)
{
asm volatile (
"dsb sy;" /* Ensure visibility of PTE writes */
@@ -54,10 +56,12 @@ static inline void flush_xen_data_tlb(void)
}
/*
- * Flush a range of VA's hypervisor mappings from the data TLB. This is not
- * sufficient when changing code mappings or for self modifying code.
+ * Flush a range of VA's hypervisor mappings from the data TLB of the
+ * local processor. This is not sufficient when changing code mappings
+ * or for self modifying code.
*/
-static inline void flush_xen_data_tlb_range_va(unsigned long va, unsigned long
size)
+static inline void flush_xen_data_tlb_range_va_local(unsigned long va,
+ unsigned long size)
{
unsigned long end = va + size;
dsb(sy); /* Ensure preceding are visible */
--
1.7.10.4
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