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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [PATCH v2 4/4] x86: adjustments to guest handle treatment
First of all avoid excessive conversions. copy_{from,to}_guest(), for
example, work fine with all of XEN_GUEST_HANDLE{,_64,_PARAM}().
Further
- do_physdev_op_compat() didn't use the param form for its parameter,
- {hap,shadow}_track_dirty_vram() wrongly used the param form,
- compat processor Px logic failed to check compatibility of native and
compat structures not further converted.
As this eliminates all users of guest_handle_from_param() and as there's
no real need to allow for conversions in both directions, drop the
macros as well.
Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
---
v2: New.
--- a/xen/arch/x86/compat.c
+++ b/xen/arch/x86/compat.c
@@ -15,7 +15,7 @@ typedef long ret_t;
#endif
/* Legacy hypercall (as of 0x00030202). */
-ret_t do_physdev_op_compat(XEN_GUEST_HANDLE(physdev_op_t) uop)
+ret_t do_physdev_op_compat(XEN_GUEST_HANDLE_PARAM(physdev_op_t) uop)
{
typeof(do_physdev_op) *fn =
(void *)pv_hypercall_table[__HYPERVISOR_physdev_op].native;
--- a/xen/arch/x86/cpu/microcode/core.c
+++ b/xen/arch/x86/cpu/microcode/core.c
@@ -678,7 +678,7 @@ static long microcode_update_helper(void
return ret;
}
-int microcode_update(XEN_GUEST_HANDLE_PARAM(const_void) buf, unsigned long len)
+int microcode_update(XEN_GUEST_HANDLE(const_void) buf, unsigned long len)
{
int ret;
struct ucode_buf *buffer;
--- a/xen/arch/x86/mm.c
+++ b/xen/arch/x86/mm.c
@@ -4441,20 +4441,16 @@ static int _handle_iomem_range(unsigned
{
if ( s > ctxt->s && !(s >> (paddr_bits - PAGE_SHIFT)) )
{
- e820entry_t ent;
- XEN_GUEST_HANDLE_PARAM(e820entry_t) buffer_param;
- XEN_GUEST_HANDLE(e820entry_t) buffer;
-
if ( !guest_handle_is_null(ctxt->map.buffer) )
{
+ e820entry_t ent;
+
if ( ctxt->n + 1 >= ctxt->map.nr_entries )
return -EINVAL;
ent.addr = (uint64_t)ctxt->s << PAGE_SHIFT;
ent.size = (uint64_t)(s - ctxt->s) << PAGE_SHIFT;
ent.type = E820_RESERVED;
- buffer_param = guest_handle_cast(ctxt->map.buffer, e820entry_t);
- buffer = guest_handle_from_param(buffer_param, e820entry_t);
- if ( __copy_to_guest_offset(buffer, ctxt->n, &ent, 1) )
+ if ( __copy_to_guest_offset(ctxt->map.buffer, ctxt->n, &ent, 1) )
return -EFAULT;
}
ctxt->n++;
@@ -4715,8 +4711,7 @@ long arch_memory_op(unsigned long cmd, X
case XENMEM_machine_memory_map:
{
struct memory_map_context ctxt;
- XEN_GUEST_HANDLE(e820entry_t) buffer;
- XEN_GUEST_HANDLE_PARAM(e820entry_t) buffer_param;
+ XEN_GUEST_HANDLE_PARAM(e820entry_t) buffer;
unsigned int i;
bool store;
@@ -4732,8 +4727,7 @@ long arch_memory_op(unsigned long cmd, X
if ( store && ctxt.map.nr_entries < e820.nr_map + 1 )
return -EINVAL;
- buffer_param = guest_handle_cast(ctxt.map.buffer, e820entry_t);
- buffer = guest_handle_from_param(buffer_param, e820entry_t);
+ buffer = guest_handle_cast(ctxt.map.buffer, e820entry_t);
if ( store && !guest_handle_okay(buffer, ctxt.map.nr_entries) )
return -EFAULT;
--- a/xen/arch/x86/mm/hap/hap.c
+++ b/xen/arch/x86/mm/hap/hap.c
@@ -59,7 +59,7 @@
int hap_track_dirty_vram(struct domain *d,
unsigned long begin_pfn,
unsigned long nr,
- XEN_GUEST_HANDLE_PARAM(void) guest_dirty_bitmap)
+ XEN_GUEST_HANDLE(void) guest_dirty_bitmap)
{
long rc = 0;
struct sh_dirty_vram *dirty_vram;
--- a/xen/arch/x86/mm/shadow/common.c
+++ b/xen/arch/x86/mm/shadow/common.c
@@ -3171,7 +3171,7 @@ static void sh_clean_dirty_bitmap(struct
int shadow_track_dirty_vram(struct domain *d,
unsigned long begin_pfn,
unsigned long nr,
- XEN_GUEST_HANDLE_PARAM(void) guest_dirty_bitmap)
+ XEN_GUEST_HANDLE(void) guest_dirty_bitmap)
{
int rc = 0;
unsigned long end_pfn = begin_pfn + nr;
--- a/xen/arch/x86/oprofile/backtrace.c
+++ b/xen/arch/x86/oprofile/backtrace.c
@@ -74,11 +74,8 @@ dump_guest_backtrace(struct vcpu *vcpu,
}
else
{
- XEN_GUEST_HANDLE(const_frame_head_t) guest_head;
- XEN_GUEST_HANDLE_PARAM(const_frame_head_t) guest_head_param =
+ XEN_GUEST_HANDLE_PARAM(const_frame_head_t) guest_head =
const_guest_handle_from_ptr(head, frame_head_t);
- guest_head = guest_handle_from_param(guest_head_param,
- const_frame_head_t);
/* Also check accessibility of one struct frame_head beyond */
if (!guest_handle_okay(guest_head, 2))
--- a/xen/arch/x86/platform_hypercall.c
+++ b/xen/arch/x86/platform_hypercall.c
@@ -285,9 +285,7 @@ ret_t do_platform_op(XEN_GUEST_HANDLE_PA
guest_from_compat_handle(data, op->u.microcode.data);
- ret = microcode_update(
- guest_handle_to_param(data, const_void),
- op->u.microcode.length);
+ ret = microcode_update(data, op->u.microcode.length);
}
break;
@@ -531,9 +529,7 @@ ret_t do_platform_op(XEN_GUEST_HANDLE_PA
XEN_GUEST_HANDLE(uint32) pdc;
guest_from_compat_handle(pdc, op->u.set_pminfo.u.pdc);
- ret = acpi_set_pdc_bits(
- op->u.set_pminfo.id,
- guest_handle_to_param(pdc, uint32));
+ ret = acpi_set_pdc_bits(op->u.set_pminfo.id, pdc);
}
break;
--- a/xen/arch/x86/x86_64/compat.c
+++ b/xen/arch/x86/x86_64/compat.c
@@ -15,6 +15,7 @@ EMIT_FILE;
#define COMPAT
#define _XEN_GUEST_HANDLE(t) XEN_GUEST_HANDLE(t)
+#define _XEN_GUEST_HANDLE_PARAM(t) XEN_GUEST_HANDLE_PARAM(t)
typedef int ret_t;
#include "../compat.c"
--- a/xen/arch/x86/x86_64/cpu_idle.c
+++ b/xen/arch/x86/x86_64/cpu_idle.c
@@ -52,13 +52,9 @@ static int copy_from_compat_state(xen_pr
compat_processor_cx_t *state)
{
#define XLAT_processor_cx_HNDL_dp(_d_, _s_) do { \
- XEN_GUEST_HANDLE(compat_processor_csd_t) dps; \
- XEN_GUEST_HANDLE_PARAM(xen_processor_csd_t) dps_param; \
if ( unlikely(!compat_handle_okay((_s_)->dp, (_s_)->dpcnt)) ) \
- return -EFAULT; \
- guest_from_compat_handle(dps, (_s_)->dp); \
- dps_param = guest_handle_cast(dps, xen_processor_csd_t); \
- (_d_)->dp = guest_handle_from_param(dps_param, xen_processor_csd_t); \
+ return -EFAULT; \
+ guest_from_compat_handle((_d_)->dp, (_s_)->dp); \
} while (0)
XLAT_processor_cx(xen_state, state);
#undef XLAT_processor_cx_HNDL_dp
--- a/xen/arch/x86/x86_64/cpufreq.c
+++ b/xen/arch/x86/x86_64/cpufreq.c
@@ -26,6 +26,8 @@
#include <xen/pmstat.h>
#include <compat/platform.h>
+CHECK_processor_px;
+
DEFINE_XEN_GUEST_HANDLE(compat_processor_px_t);
int
@@ -42,13 +44,9 @@ compat_set_px_pminfo(uint32_t cpu, struc
return -EFAULT;
#define XLAT_processor_performance_HNDL_states(_d_, _s_) do { \
- XEN_GUEST_HANDLE(compat_processor_px_t) states; \
- XEN_GUEST_HANDLE_PARAM(xen_processor_px_t) states_t; \
if ( unlikely(!compat_handle_okay((_s_)->states, (_s_)->state_count)) ) \
return -EFAULT; \
- guest_from_compat_handle(states, (_s_)->states); \
- states_t = guest_handle_cast(states, xen_processor_px_t); \
- (_d_)->states = guest_handle_from_param(states_t, xen_processor_px_t); \
+ guest_from_compat_handle((_d_)->states, (_s_)->states); \
} while (0)
XLAT_processor_performance(xen_perf, perf);
--- a/xen/drivers/acpi/pmstat.c
+++ b/xen/drivers/acpi/pmstat.c
@@ -492,7 +492,7 @@ int do_pm_op(struct xen_sysctl_pm_op *op
return ret;
}
-int acpi_set_pdc_bits(u32 acpi_id, XEN_GUEST_HANDLE_PARAM(uint32) pdc)
+int acpi_set_pdc_bits(u32 acpi_id, XEN_GUEST_HANDLE(uint32) pdc)
{
u32 bits[3];
int ret;
--- a/xen/include/asm-arm/guest_access.h
+++ b/xen/include/asm-arm/guest_access.h
@@ -40,7 +40,7 @@ int access_guest_memory_by_ipa(struct do
(XEN_GUEST_HANDLE_PARAM(type)) { _x }; \
})
-/* Cast a XEN_GUEST_HANDLE to XEN_GUEST_HANDLE_PARAM */
+/* Convert a XEN_GUEST_HANDLE to XEN_GUEST_HANDLE_PARAM */
#define guest_handle_to_param(hnd, type) ({ \
typeof((hnd).p) _x = (hnd).p; \
XEN_GUEST_HANDLE_PARAM(type) _y = { _x }; \
@@ -51,18 +51,6 @@ int access_guest_memory_by_ipa(struct do
_y; \
})
-
-/* Cast a XEN_GUEST_HANDLE_PARAM to XEN_GUEST_HANDLE */
-#define guest_handle_from_param(hnd, type) ({ \
- typeof((hnd).p) _x = (hnd).p; \
- XEN_GUEST_HANDLE(type) _y = { _x }; \
- /* type checking: make sure that the pointers inside \
- * XEN_GUEST_HANDLE and XEN_GUEST_HANDLE_PARAM are of \
- * the same type, then return hnd */ \
- (void)(&_x == &_y.p); \
- _y; \
-})
-
#define guest_handle_for_field(hnd, type, fld) \
((XEN_GUEST_HANDLE(type)) { &(hnd).p->fld })
--- a/xen/include/asm-x86/guest_access.h
+++ b/xen/include/asm-x86/guest_access.h
@@ -52,21 +52,11 @@
(XEN_GUEST_HANDLE_PARAM(type)) { _x }; \
})
-/* Cast a XEN_GUEST_HANDLE to XEN_GUEST_HANDLE_PARAM */
+/* Convert a XEN_GUEST_HANDLE to XEN_GUEST_HANDLE_PARAM */
#define guest_handle_to_param(hnd, type) ({ \
/* type checking: make sure that the pointers inside \
* XEN_GUEST_HANDLE and XEN_GUEST_HANDLE_PARAM are of \
* the same type, then return hnd */ \
- (void)((typeof(&(hnd).p)) 0 == \
- (typeof(&((XEN_GUEST_HANDLE_PARAM(type)) {}).p)) 0); \
- (hnd); \
-})
-
-/* Cast a XEN_GUEST_HANDLE_PARAM to XEN_GUEST_HANDLE */
-#define guest_handle_from_param(hnd, type) ({ \
- /* type checking: make sure that the pointers inside \
- * XEN_GUEST_HANDLE and XEN_GUEST_HANDLE_PARAM are of \
- * the same type, then return hnd */ \
(void)((typeof(&(hnd).p)) 0 == \
(typeof(&((XEN_GUEST_HANDLE_PARAM(type)) {}).p)) 0); \
(hnd); \
--- a/xen/include/asm-x86/hap.h
+++ b/xen/include/asm-x86/hap.h
@@ -41,7 +41,7 @@ void hap_vcpu_init(struct vcpu *v);
int hap_track_dirty_vram(struct domain *d,
unsigned long begin_pfn,
unsigned long nr,
- XEN_GUEST_HANDLE_PARAM(void) dirty_bitmap);
+ XEN_GUEST_HANDLE(void) dirty_bitmap);
extern const struct paging_mode *hap_paging_get_mode(struct vcpu *);
int hap_set_allocation(struct domain *d, unsigned int pages, bool *preempted);
--- a/xen/include/asm-x86/microcode.h
+++ b/xen/include/asm-x86/microcode.h
@@ -20,7 +20,7 @@ struct cpu_signature {
DECLARE_PER_CPU(struct cpu_signature, cpu_sig);
void microcode_set_module(unsigned int idx);
-int microcode_update(XEN_GUEST_HANDLE_PARAM(const_void), unsigned long len);
+int microcode_update(XEN_GUEST_HANDLE(const_void), unsigned long len);
int early_microcode_init(void);
int microcode_update_one(bool start_update);
--- a/xen/include/asm-x86/shadow.h
+++ b/xen/include/asm-x86/shadow.h
@@ -64,7 +64,7 @@ int shadow_enable(struct domain *d, u32
int shadow_track_dirty_vram(struct domain *d,
unsigned long first_pfn,
unsigned long nr,
- XEN_GUEST_HANDLE_PARAM(void) dirty_bitmap);
+ XEN_GUEST_HANDLE(void) dirty_bitmap);
/* Handler for shadow control ops: operations from user-space to enable
* and disable ephemeral shadow modes (test mode and log-dirty mode) and
--- a/xen/include/xen/acpi.h
+++ b/xen/include/xen/acpi.h
@@ -184,8 +184,8 @@ static inline unsigned int acpi_get_csub
static inline void acpi_set_csubstate_limit(unsigned int new_limit) { return; }
#endif
-#ifdef XEN_GUEST_HANDLE_PARAM
-int acpi_set_pdc_bits(u32 acpi_id, XEN_GUEST_HANDLE_PARAM(uint32));
+#ifdef XEN_GUEST_HANDLE
+int acpi_set_pdc_bits(u32 acpi_id, XEN_GUEST_HANDLE(uint32));
#endif
int arch_acpi_set_pdc_bits(u32 acpi_id, u32 *, u32 mask);
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