Mailing List Archive

More specifically:
1. replaces xenctl_cpumap with xenctl_bitmap
2. provides bitmap_to_xenctl_bitmap and the reverse;
3. re-implement cpumask_to_xenctl_bitmap with
bitmap_to_xenctl_bitmap and the reverse;

Other than #3, no functional changes. Interface only slightly
afected.

This is in preparation of introducing NUMA node-affinity maps.

Signed-off-by: Dario Faggioli <dario.faggioli@citrix.com>
Acked-by: George Dunlap <george.dunlap@eu.citrix.com>
Acked-by: Juergen Gross <juergen.gross@ts.fujitsu.com>

diff --git a/tools/libxc/xc_cpupool.c b/tools/libxc/xc_cpupool.c
--- a/tools/libxc/xc_cpupool.c
+++ b/tools/libxc/xc_cpupool.c
@@ -90,7 +90,7 @@ xc_cpupoolinfo_t *xc_cpupool_getinfo(xc_
sysctl.u.cpupool_op.op = XEN_SYSCTL_CPUPOOL_OP_INFO;
sysctl.u.cpupool_op.cpupool_id = poolid;
set_xen_guest_handle(sysctl.u.cpupool_op.cpumap.bitmap, local);
- sysctl.u.cpupool_op.cpumap.nr_cpus = local_size * 8;
+ sysctl.u.cpupool_op.cpumap.nr_elems = local_size * 8;

err = do_sysctl_save(xch, &sysctl);

@@ -184,7 +184,7 @@ xc_cpumap_t xc_cpupool_freeinfo(xc_inter
sysctl.cmd = XEN_SYSCTL_cpupool_op;
sysctl.u.cpupool_op.op = XEN_SYSCTL_CPUPOOL_OP_FREEINFO;
set_xen_guest_handle(sysctl.u.cpupool_op.cpumap.bitmap, local);
- sysctl.u.cpupool_op.cpumap.nr_cpus = mapsize * 8;
+ sysctl.u.cpupool_op.cpumap.nr_elems = mapsize * 8;

err = do_sysctl_save(xch, &sysctl);

diff --git a/tools/libxc/xc_domain.c b/tools/libxc/xc_domain.c
--- a/tools/libxc/xc_domain.c
+++ b/tools/libxc/xc_domain.c
@@ -142,7 +142,7 @@ int xc_vcpu_setaffinity(xc_interface *xc

set_xen_guest_handle(domctl.u.vcpuaffinity.cpumap.bitmap, local);

- domctl.u.vcpuaffinity.cpumap.nr_cpus = cpusize * 8;
+ domctl.u.vcpuaffinity.cpumap.nr_elems = cpusize * 8;

ret = do_domctl(xch, &domctl);

@@ -182,7 +182,7 @@ int xc_vcpu_getaffinity(xc_interface *xc
domctl.u.vcpuaffinity.vcpu = vcpu;

set_xen_guest_handle(domctl.u.vcpuaffinity.cpumap.bitmap, local);
- domctl.u.vcpuaffinity.cpumap.nr_cpus = cpusize * 8;
+ domctl.u.vcpuaffinity.cpumap.nr_elems = cpusize * 8;

ret = do_domctl(xch, &domctl);

diff --git a/tools/libxc/xc_tbuf.c b/tools/libxc/xc_tbuf.c
--- a/tools/libxc/xc_tbuf.c
+++ b/tools/libxc/xc_tbuf.c
@@ -134,7 +134,7 @@ int xc_tbuf_set_cpu_mask(xc_interface *x
bitmap_64_to_byte(bytemap, &mask64, sizeof (mask64) * 8);

set_xen_guest_handle(sysctl.u.tbuf_op.cpu_mask.bitmap, bytemap);
- sysctl.u.tbuf_op.cpu_mask.nr_cpus = sizeof(bytemap) * 8;
+ sysctl.u.tbuf_op.cpu_mask.nr_elems = sizeof(bytemap) * 8;

ret = do_sysctl(xch, &sysctl);

diff --git a/xen/arch/x86/cpu/mcheck/mce.c b/xen/arch/x86/cpu/mcheck/mce.c
--- a/xen/arch/x86/cpu/mcheck/mce.c
+++ b/xen/arch/x86/cpu/mcheck/mce.c
@@ -1457,8 +1457,7 @@ long do_mca(XEN_GUEST_HANDLE_PARAM(xen_m
cpumap = &cpu_online_map;
else
{
- ret = xenctl_cpumap_to_cpumask(&cmv,
- &op->u.mc_inject_v2.cpumap);
+ ret = xenctl_bitmap_to_cpumask(&cmv, &op->u.mc_inject_v2.cpumap);
if ( ret )
break;
cpumap = cmv;
diff --git a/xen/arch/x86/platform_hypercall.c b/xen/arch/x86/platform_hypercall.c
--- a/xen/arch/x86/platform_hypercall.c
+++ b/xen/arch/x86/platform_hypercall.c
@@ -375,7 +375,7 @@ ret_t do_platform_op(XEN_GUEST_HANDLE_PA
{
uint32_t cpu;
uint64_t idletime, now = NOW();
- struct xenctl_cpumap ctlmap;
+ struct xenctl_bitmap ctlmap;
cpumask_var_t cpumap;
XEN_GUEST_HANDLE(uint8) cpumap_bitmap;
XEN_GUEST_HANDLE(uint64) idletimes;
@@ -388,11 +388,11 @@ ret_t do_platform_op(XEN_GUEST_HANDLE_PA
if ( cpufreq_controller != FREQCTL_dom0_kernel )
break;

- ctlmap.nr_cpus = op->u.getidletime.cpumap_nr_cpus;
+ ctlmap.nr_elems = op->u.getidletime.cpumap_nr_cpus;
guest_from_compat_handle(cpumap_bitmap,
op->u.getidletime.cpumap_bitmap);
ctlmap.bitmap.p = cpumap_bitmap.p; /* handle -> handle_64 conversion */
- if ( (ret = xenctl_cpumap_to_cpumask(&cpumap, &ctlmap)) != 0 )
+ if ( (ret = xenctl_bitmap_to_cpumask(&cpumap, &ctlmap)) != 0 )
goto out;
guest_from_compat_handle(idletimes, op->u.getidletime.idletime);

@@ -411,7 +411,7 @@ ret_t do_platform_op(XEN_GUEST_HANDLE_PA

op->u.getidletime.now = now;
if ( ret == 0 )
- ret = cpumask_to_xenctl_cpumap(&ctlmap, cpumap);
+ ret = cpumask_to_xenctl_bitmap(&ctlmap, cpumap);
free_cpumask_var(cpumap);

if ( ret == 0 && __copy_field_to_guest(u_xenpf_op, op, u.getidletime) )
diff --git a/xen/common/cpupool.c b/xen/common/cpupool.c
--- a/xen/common/cpupool.c
+++ b/xen/common/cpupool.c
@@ -493,7 +493,7 @@ int cpupool_do_sysctl(struct xen_sysctl_
op->cpupool_id = c->cpupool_id;
op->sched_id = c->sched->sched_id;
op->n_dom = c->n_dom;
- ret = cpumask_to_xenctl_cpumap(&op->cpumap, c->cpu_valid);
+ ret = cpumask_to_xenctl_bitmap(&op->cpumap, c->cpu_valid);
cpupool_put(c);
}
break;
@@ -588,7 +588,7 @@ int cpupool_do_sysctl(struct xen_sysctl_

case XEN_SYSCTL_CPUPOOL_OP_FREEINFO:
{
- ret = cpumask_to_xenctl_cpumap(
+ ret = cpumask_to_xenctl_bitmap(
&op->cpumap, &cpupool_free_cpus);
}
break;
diff --git a/xen/common/domctl.c b/xen/common/domctl.c
--- a/xen/common/domctl.c
+++ b/xen/common/domctl.c
@@ -32,28 +32,29 @@
static DEFINE_SPINLOCK(domctl_lock);
DEFINE_SPINLOCK(vcpu_alloc_lock);

-int cpumask_to_xenctl_cpumap(
- struct xenctl_cpumap *xenctl_cpumap, const cpumask_t *cpumask)
+int bitmap_to_xenctl_bitmap(struct xenctl_bitmap *xenctl_bitmap,
+ const unsigned long *bitmap,
+ unsigned int nbits)
{
unsigned int guest_bytes, copy_bytes, i;
uint8_t zero = 0;
int err = 0;
- uint8_t *bytemap = xmalloc_array(uint8_t, (nr_cpu_ids + 7) / 8);
+ uint8_t *bytemap = xmalloc_array(uint8_t, (nbits + 7) / 8);

if ( !bytemap )
return -ENOMEM;

- guest_bytes = (xenctl_cpumap->nr_cpus + 7) / 8;
- copy_bytes = min_t(unsigned int, guest_bytes, (nr_cpu_ids + 7) / 8);
+ guest_bytes = (xenctl_bitmap->nr_elems + 7) / 8;
+ copy_bytes = min_t(unsigned int, guest_bytes, (nbits + 7) / 8);

- bitmap_long_to_byte(bytemap, cpumask_bits(cpumask), nr_cpu_ids);
+ bitmap_long_to_byte(bytemap, bitmap, nbits);

if ( copy_bytes != 0 )
- if ( copy_to_guest(xenctl_cpumap->bitmap, bytemap, copy_bytes) )
+ if ( copy_to_guest(xenctl_bitmap->bitmap, bytemap, copy_bytes) )
err = -EFAULT;

for ( i = copy_bytes; !err && i < guest_bytes; i++ )
- if ( copy_to_guest_offset(xenctl_cpumap->bitmap, i, &zero, 1) )
+ if ( copy_to_guest_offset(xenctl_bitmap->bitmap, i, &zero, 1) )
err = -EFAULT;

xfree(bytemap);
@@ -61,36 +62,58 @@ int cpumask_to_xenctl_cpumap(
return err;
}

-int xenctl_cpumap_to_cpumask(
- cpumask_var_t *cpumask, const struct xenctl_cpumap *xenctl_cpumap)
+int xenctl_bitmap_to_bitmap(unsigned long *bitmap,
+ const struct xenctl_bitmap *xenctl_bitmap,
+ unsigned int nbits)
{
unsigned int guest_bytes, copy_bytes;
int err = 0;
- uint8_t *bytemap = xzalloc_array(uint8_t, (nr_cpu_ids + 7) / 8);
+ uint8_t *bytemap = xzalloc_array(uint8_t, (nbits + 7) / 8);

if ( !bytemap )
return -ENOMEM;

- guest_bytes = (xenctl_cpumap->nr_cpus + 7) / 8;
- copy_bytes = min_t(unsigned int, guest_bytes, (nr_cpu_ids + 7) / 8);
+ guest_bytes = (xenctl_bitmap->nr_elems + 7) / 8;
+ copy_bytes = min_t(unsigned int, guest_bytes, (nbits + 7) / 8);

if ( copy_bytes != 0 )
{
- if ( copy_from_guest(bytemap, xenctl_cpumap->bitmap, copy_bytes) )
+ if ( copy_from_guest(bytemap, xenctl_bitmap->bitmap, copy_bytes) )
err = -EFAULT;
- if ( (xenctl_cpumap->nr_cpus & 7) && (guest_bytes == copy_bytes) )
- bytemap[guest_bytes-1] &= ~(0xff << (xenctl_cpumap->nr_cpus & 7));
+ if ( (xenctl_bitmap->nr_elems & 7) && (guest_bytes == copy_bytes) )
+ bytemap[guest_bytes-1] &= ~(0xff << (xenctl_bitmap->nr_elems & 7));
}

- if ( err )
- /* nothing */;
- else if ( alloc_cpumask_var(cpumask) )
- bitmap_byte_to_long(cpumask_bits(*cpumask), bytemap, nr_cpu_ids);
+ if ( !err )
+ bitmap_byte_to_long(bitmap, bytemap, nbits);
+
+ xfree(bytemap);
+
+ return err;
+}
+
+int cpumask_to_xenctl_bitmap(struct xenctl_bitmap *xenctl_cpumap,
+ const cpumask_t *cpumask)
+{
+ return bitmap_to_xenctl_bitmap(xenctl_cpumap, cpumask_bits(cpumask),
+ nr_cpu_ids);
+}
+
+int xenctl_bitmap_to_cpumask(cpumask_var_t *cpumask,
+ const struct xenctl_bitmap *xenctl_cpumap)
+{
+ int err = 0;
+
+ if ( alloc_cpumask_var(cpumask) ) {
+ err = xenctl_bitmap_to_bitmap(cpumask_bits(*cpumask), xenctl_cpumap,
+ nr_cpu_ids);
+ /* In case of error, cleanup is up to us, as the caller won't care! */
+ if ( err )
+ free_cpumask_var(*cpumask);
+ }
else
err = -ENOMEM;

- xfree(bytemap);
-
return err;
}

@@ -583,7 +606,7 @@ long do_domctl(XEN_GUEST_HANDLE_PARAM(xe
{
cpumask_var_t new_affinity;

- ret = xenctl_cpumap_to_cpumask(
+ ret = xenctl_bitmap_to_cpumask(
&new_affinity, &op->u.vcpuaffinity.cpumap);
if ( !ret )
{
@@ -593,7 +616,7 @@ long do_domctl(XEN_GUEST_HANDLE_PARAM(xe
}
else
{
- ret = cpumask_to_xenctl_cpumap(
+ ret = cpumask_to_xenctl_bitmap(
&op->u.vcpuaffinity.cpumap, v->cpu_affinity);
}
}
diff --git a/xen/common/trace.c b/xen/common/trace.c
--- a/xen/common/trace.c
+++ b/xen/common/trace.c
@@ -384,7 +384,7 @@ int tb_control(xen_sysctl_tbuf_op_t *tbc
{
cpumask_var_t mask;

- rc = xenctl_cpumap_to_cpumask(&mask, &tbc->cpu_mask);
+ rc = xenctl_bitmap_to_cpumask(&mask, &tbc->cpu_mask);
if ( !rc )
{
cpumask_copy(&tb_cpu_mask, mask);
diff --git a/xen/include/public/arch-x86/xen-mca.h b/xen/include/public/arch-x86/xen-mca.h
--- a/xen/include/public/arch-x86/xen-mca.h
+++ b/xen/include/public/arch-x86/xen-mca.h
@@ -414,7 +414,7 @@ struct xen_mc_mceinject {

struct xen_mc_inject_v2 {
uint32_t flags;
- struct xenctl_cpumap cpumap;
+ struct xenctl_bitmap cpumap;
};
#endif

diff --git a/xen/include/public/domctl.h b/xen/include/public/domctl.h
--- a/xen/include/public/domctl.h
+++ b/xen/include/public/domctl.h
@@ -284,7 +284,7 @@ DEFINE_XEN_GUEST_HANDLE(xen_domctl_getvc
/* XEN_DOMCTL_getvcpuaffinity */
struct xen_domctl_vcpuaffinity {
uint32_t vcpu; /* IN */
- struct xenctl_cpumap cpumap; /* IN/OUT */
+ struct xenctl_bitmap cpumap; /* IN/OUT */
};
typedef struct xen_domctl_vcpuaffinity xen_domctl_vcpuaffinity_t;
DEFINE_XEN_GUEST_HANDLE(xen_domctl_vcpuaffinity_t);
diff --git a/xen/include/public/sysctl.h b/xen/include/public/sysctl.h
--- a/xen/include/public/sysctl.h
+++ b/xen/include/public/sysctl.h
@@ -71,7 +71,7 @@ struct xen_sysctl_tbuf_op {
#define XEN_SYSCTL_TBUFOP_disable 5
uint32_t cmd;
/* IN/OUT variables */
- struct xenctl_cpumap cpu_mask;
+ struct xenctl_bitmap cpu_mask;
uint32_t evt_mask;
/* OUT variables */
uint64_aligned_t buffer_mfn;
@@ -532,7 +532,7 @@ struct xen_sysctl_cpupool_op {
uint32_t domid; /* IN: M */
uint32_t cpu; /* IN: AR */
uint32_t n_dom; /* OUT: I */
- struct xenctl_cpumap cpumap; /* OUT: IF */
+ struct xenctl_bitmap cpumap; /* OUT: IF */
};
typedef struct xen_sysctl_cpupool_op xen_sysctl_cpupool_op_t;
DEFINE_XEN_GUEST_HANDLE(xen_sysctl_cpupool_op_t);
diff --git a/xen/include/public/xen.h b/xen/include/public/xen.h
--- a/xen/include/public/xen.h
+++ b/xen/include/public/xen.h
@@ -851,9 +851,9 @@ typedef uint8_t xen_domain_handle_t[16];
#endif

#ifndef __ASSEMBLY__
-struct xenctl_cpumap {
+struct xenctl_bitmap {
XEN_GUEST_HANDLE_64(uint8) bitmap;
- uint32_t nr_cpus;
+ uint32_t nr_elems;
};
#endif

diff --git a/xen/include/xen/cpumask.h b/xen/include/xen/cpumask.h
--- a/xen/include/xen/cpumask.h
+++ b/xen/include/xen/cpumask.h
@@ -424,8 +424,8 @@ extern cpumask_t cpu_present_map;
#define for_each_present_cpu(cpu) for_each_cpu(cpu, &cpu_present_map)

/* Copy to/from cpumap provided by control tools. */
-struct xenctl_cpumap;
-int cpumask_to_xenctl_cpumap(struct xenctl_cpumap *, const cpumask_t *);
-int xenctl_cpumap_to_cpumask(cpumask_var_t *, const struct xenctl_cpumap *);
+struct xenctl_bitmap;
+int cpumask_to_xenctl_bitmap(struct xenctl_bitmap *, const cpumask_t *);
+int xenctl_bitmap_to_cpumask(cpumask_var_t *, const struct xenctl_bitmap *);

#endif /* __XEN_CPUMASK_H */
diff --git a/xen/include/xlat.lst b/xen/include/xlat.lst
--- a/xen/include/xlat.lst
+++ b/xen/include/xlat.lst
@@ -2,7 +2,7 @@
# ! - needs translation
# ? - needs checking
? dom0_vga_console_info xen.h
-? xenctl_cpumap xen.h
+? xenctl_bitmap xen.h
? mmu_update xen.h
! mmuext_op xen.h
! start_info xen.h

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