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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [IA64] cache flush
# HG changeset patch
# User awilliam@xxxxxxxxxxx
# Node ID 3b3a5588baca92e5518a5c890156fae7fba7b0b6
# Parent ddc279c915023e2ec9489dd7014ba88062db904b
[IA64] cache flush
domain_cache_flush added.
SAL_CACHE_FLUSH implemented.
Signed-off-by: Tristan Gingold <tristan.gingold@xxxxxxxx>
diff -r ddc279c91502 -r 3b3a5588baca xen/arch/ia64/linux-xen/setup.c
--- a/xen/arch/ia64/linux-xen/setup.c Fri Mar 31 14:04:16 2006 -0700
+++ b/xen/arch/ia64/linux-xen/setup.c Mon Apr 03 08:33:35 2006 -0600
@@ -104,6 +104,11 @@ extern void early_cmdline_parse(char **)
*/
#define I_CACHE_STRIDE_SHIFT 5 /* Safest way to go: 32 bytes
by 32 bytes */
unsigned long ia64_i_cache_stride_shift = ~0;
+
+#ifdef XEN
+#define D_CACHE_STRIDE_SHIFT 5 /* Safest. */
+unsigned long ia64_d_cache_stride_shift = ~0;
+#endif
/*
* The merge_mask variable needs to be set to (max(iommu_page_size(iommu)) -
1). This
@@ -718,6 +723,9 @@ get_max_cacheline_size (void)
max = SMP_CACHE_BYTES;
/* Safest setup for "flush_icache_range()" */
ia64_i_cache_stride_shift = I_CACHE_STRIDE_SHIFT;
+#ifdef XEN
+ ia64_d_cache_stride_shift = D_CACHE_STRIDE_SHIFT;
+#endif
goto out;
}
@@ -733,6 +741,10 @@ get_max_cacheline_size (void)
cci.pcci_stride = I_CACHE_STRIDE_SHIFT;
cci.pcci_unified = 1;
}
+#ifdef XEN
+ if (cci.pcci_stride < ia64_d_cache_stride_shift)
+ ia64_d_cache_stride_shift = cci.pcci_stride;
+#endif
line_size = 1 << cci.pcci_line_size;
if (line_size > max)
max = line_size;
@@ -754,6 +766,11 @@ get_max_cacheline_size (void)
out:
if (max > ia64_max_cacheline_size)
ia64_max_cacheline_size = max;
+#ifdef XEN
+ if (ia64_d_cache_stride_shift > ia64_i_cache_stride_shift)
+ ia64_d_cache_stride_shift = ia64_i_cache_stride_shift;
+#endif
+
}
/*
diff -r ddc279c91502 -r 3b3a5588baca xen/arch/ia64/xen/Makefile
--- a/xen/arch/ia64/xen/Makefile Fri Mar 31 14:04:16 2006 -0700
+++ b/xen/arch/ia64/xen/Makefile Mon Apr 03 08:33:35 2006 -0600
@@ -24,6 +24,7 @@ obj-y += xenmisc.o
obj-y += xenmisc.o
obj-y += xensetup.o
obj-y += xentime.o
+obj-y += flushd.o
obj-$(crash_debug) += gdbstub.o
diff -r ddc279c91502 -r 3b3a5588baca xen/arch/ia64/xen/dom_fw.c
--- a/xen/arch/ia64/xen/dom_fw.c Fri Mar 31 14:04:16 2006 -0700
+++ b/xen/arch/ia64/xen/dom_fw.c Mon Apr 03 08:33:35 2006 -0600
@@ -176,7 +176,9 @@ sal_emulator (long index, unsigned long
printf("*** CALLED SAL_MC_SET_PARAMS. IGNORED...\n");
break;
case SAL_CACHE_FLUSH:
- printf("*** CALLED SAL_CACHE_FLUSH. IGNORED...\n");
+ /* The best we can do is to flush with fc all the domain. */
+ domain_cache_flush (current->domain, in1 == 4 ? 1 : 0);
+ status = 0;
break;
case SAL_CACHE_INIT:
printf("*** CALLED SAL_CACHE_INIT. IGNORED...\n");
diff -r ddc279c91502 -r 3b3a5588baca xen/arch/ia64/xen/domain.c
--- a/xen/arch/ia64/xen/domain.c Fri Mar 31 14:04:16 2006 -0700
+++ b/xen/arch/ia64/xen/domain.c Mon Apr 03 08:33:35 2006 -0600
@@ -674,6 +674,61 @@ tryagain:
return 0;
}
+/* Flush cache of domain d. */
+void domain_cache_flush (struct domain *d, int sync_only)
+{
+ struct mm_struct *mm = d->arch.mm;
+ pgd_t *pgd = mm->pgd;
+ unsigned long maddr;
+ int i,j,k, l;
+ int nbr_page = 0;
+ void (*flush_func)(unsigned long start, unsigned long end);
+ extern void flush_dcache_range (unsigned long, unsigned long);
+
+ if (sync_only)
+ flush_func = &flush_icache_range;
+ else
+ flush_func = &flush_dcache_range;
+
+#ifdef CONFIG_DOMAIN0_CONTIGUOUS
+ if (d == dom0) {
+ /* This is not fully correct (because of hole), but it should
+ be enough for now. */
+ (*flush_func)(__va_ul (dom0_start),
+ __va_ul (dom0_start + dom0_size));
+ return;
+ }
+#endif
+ for (i = 0; i < PTRS_PER_PGD; pgd++, i++) {
+ pud_t *pud;
+ if (!pgd_present(*pgd))
+ continue;
+ pud = pud_offset(pgd, 0);
+ for (j = 0; j < PTRS_PER_PUD; pud++, j++) {
+ pmd_t *pmd;
+ if (!pud_present(*pud))
+ continue;
+ pmd = pmd_offset(pud, 0);
+ for (k = 0; k < PTRS_PER_PMD; pmd++, k++) {
+ pte_t *pte;
+ if (!pmd_present(*pmd))
+ continue;
+ pte = pte_offset_map(pmd, 0);
+ for (l = 0; l < PTRS_PER_PTE; pte++, l++) {
+ if (!pte_present(*pte))
+ continue;
+ /* Convert PTE to maddr. */
+ maddr = __va_ul (pte_val(*pte)
+ & _PAGE_PPN_MASK);
+ (*flush_func)(maddr, maddr+ PAGE_SIZE);
+ nbr_page++;
+ }
+ }
+ }
+ }
+ //printf ("domain_cache_flush: %d %d pages\n", d->domain_id, nbr_page);
+}
+
// FIXME: ONLY USE FOR DOMAIN PAGE_SIZE == PAGE_SIZE
#if 1
unsigned long domain_mpa_to_imva(struct domain *d, unsigned long mpaddr)
diff -r ddc279c91502 -r 3b3a5588baca xen/include/asm-ia64/domain.h
--- a/xen/include/asm-ia64/domain.h Fri Mar 31 14:04:16 2006 -0700
+++ b/xen/include/asm-ia64/domain.h Mon Apr 03 08:33:35 2006 -0600
@@ -12,6 +12,11 @@
#include <xen/cpumask.h>
extern void domain_relinquish_resources(struct domain *);
+
+/* Flush cache of domain d.
+ If sync_only is true, only synchronize I&D caches,
+ if false, flush and invalidate caches. */
+extern void domain_cache_flush (struct domain *d, int sync_only);
struct arch_domain {
struct mm_struct *mm;
diff -r ddc279c91502 -r 3b3a5588baca xen/include/asm-ia64/vhpt.h
--- a/xen/include/asm-ia64/vhpt.h Fri Mar 31 14:04:16 2006 -0700
+++ b/xen/include/asm-ia64/vhpt.h Mon Apr 03 08:33:35 2006 -0600
@@ -127,6 +127,7 @@ extern void vhpt_insert (unsigned long v
extern void vhpt_insert (unsigned long vadr, unsigned long ptr,
unsigned logps);
extern void vhpt_flush(void);
+extern void smp_vhpt_flush_all(void);
/* Currently the VHPT is allocated per CPU. */
DECLARE_PER_CPU (unsigned long, vhpt_paddr);
diff -r ddc279c91502 -r 3b3a5588baca xen/include/asm-ia64/xenpage.h
--- a/xen/include/asm-ia64/xenpage.h Fri Mar 31 14:04:16 2006 -0700
+++ b/xen/include/asm-ia64/xenpage.h Mon Apr 03 08:33:35 2006 -0600
@@ -55,6 +55,9 @@ static inline int get_order_from_pages(u
#define __pa(x) ({xen_va _v; _v.l = (long) (x); _v.f.reg = 0;
_v.l;})
#define __va(x) ({xen_va _v; _v.l = (long) (x); _v.f.reg = -1;
_v.p;})
+/* It is sometimes very useful to have unsigned long as result. */
+#define __va_ul(x) ({xen_va _v; _v.l = (long) (x); _v.f.reg = -1; _v.l;})
+
#undef PAGE_OFFSET
#define PAGE_OFFSET __IA64_UL_CONST(0xf000000000000000)
diff -r ddc279c91502 -r 3b3a5588baca xen/arch/ia64/xen/flushd.S
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/xen/arch/ia64/xen/flushd.S Mon Apr 03 08:33:35 2006 -0600
@@ -0,0 +1,62 @@
+/*
+ * Cache flushing routines.
+ *
+ * Copyright (C) 1999-2001, 2005 Hewlett-Packard Co
+ * David Mosberger-Tang <davidm@xxxxxxxxxx>
+ *
+ * 05/28/05 Zoltan Menyhart Dynamic stride size
+ * 03/31/06 Tristan Gingold copied and modified for dcache.
+ */
+
+#include <asm/asmmacro.h>
+
+
+ /*
+ * flush_dcache_range(start,end)
+ *
+ * Flush cache.
+ *
+ * Must deal with range from start to end-1 but nothing else (need
to
+ * be careful not to touch addresses that may be unmapped).
+ *
+ * Note: "in0" and "in1" are preserved for debugging purposes.
+ */
+GLOBAL_ENTRY(flush_dcache_range)
+
+ .prologue
+ alloc r2=ar.pfs,2,0,0,0
+ movl r3=ia64_d_cache_stride_shift
+ mov r21=1
+ ;;
+ ld8 r20=[r3] // r20: stride shift
+ sub r22=in1,r0,1 // last byte address
+ ;;
+ shr.u r23=in0,r20 // start / (stride size)
+ shr.u r22=r22,r20 // (last byte address) / (stride size)
+ shl r21=r21,r20 // r21: stride size of the i-cache(s)
+ ;;
+ sub r8=r22,r23 // number of strides - 1
+ shl r24=r23,r20 // r24: addresses for "fc" =
+ // "start" rounded down to stride
boundary
+ .save ar.lc,r3
+ mov r3=ar.lc // save ar.lc
+ ;;
+
+ .body
+ mov ar.lc=r8
+ ;;
+ /*
+ * 32 byte aligned loop, even number of (actually 2) bundles
+ */
+.Loop: fc r24 // issuable on M0 only
+ add r24=r21,r24 // we flush "stride size" bytes per
iteration
+ nop.i 0
+ br.cloop.sptk.few .Loop
+ ;;
+ sync.i
+ ;;
+ srlz.i
+ ;;
+ mov ar.lc=r3 // restore ar.lc
+ br.ret.sptk.many rp
+END(flush_dcache_range)
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