* [PATCH Altp2m cleanup v6] altp2m cleanup work.
2016-09-26 17:52 [PATCH Altp2m cleanup v6] Cleaning up altp2m code Paul Lai
@ 2016-09-26 17:52 ` Paul Lai
2016-09-28 14:45 ` Jan Beulich
0 siblings, 1 reply; 3+ messages in thread
From: Paul Lai @ 2016-09-26 17:52 UTC (permalink / raw)
To: xen-devel; +Cc: ravi.sahita, george.dunlap, jbeulich
Indent goto labels by one space.
Inline (header) altp2m functions.
In do_altp2m_op(), during the sanity check of the passed command,
return -ENONSYS if not a valid command.
In do_altp2m_op(), when evaluating a command, ASSERT_UNREACHABLE()
if the command is not recognizable. The sanity check above should
have triggered the return of -ENOSYS.
Changes since last version:
Fixing fall through in switch statement above ASSERT_UNREACHABLE() (in
do_altp2m_op()).
Make hvm_funcs.altp2m_supported "bool" instead of "bool_t".
Make hvm_altp2m_supported() and altp2m_vcpu_emulate_ve() return
bool (rather than return void()).
Signed-off-by: Paul Lai <paul.c.lai@intel.com>
---
xen/arch/x86/hvm/hvm.c | 47 ++++++++++++++++++++-----------------------
xen/include/asm-x86/hvm/hvm.h | 26 +++++++++++++++++++-----
2 files changed, 43 insertions(+), 30 deletions(-)
diff --git a/xen/arch/x86/hvm/hvm.c b/xen/arch/x86/hvm/hvm.c
index 7bad845..3a4ea56 100644
--- a/xen/arch/x86/hvm/hvm.c
+++ b/xen/arch/x86/hvm/hvm.c
@@ -1959,11 +1959,11 @@ int hvm_hap_nested_page_fault(paddr_t gpa, unsigned long gla,
* Otherwise, this is an error condition. */
rc = fall_through;
-out_put_gfn:
+ out_put_gfn:
__put_gfn(p2m, gfn);
if ( ap2m_active )
__put_gfn(hostp2m, gfn);
-out:
+ out:
/* All of these are delayed until we exit, since we might
* sleep on event ring wait queues, and we must not hold
* locks in such circumstance */
@@ -5308,12 +5308,25 @@ static int do_altp2m_op(
return -EFAULT;
if ( a.pad1 || a.pad2 ||
- (a.version != HVMOP_ALTP2M_INTERFACE_VERSION) ||
- (a.cmd < HVMOP_altp2m_get_domain_state) ||
- (a.cmd > HVMOP_altp2m_change_gfn) )
+ (a.version != HVMOP_ALTP2M_INTERFACE_VERSION) )
return -EINVAL;
- d = (a.cmd != HVMOP_altp2m_vcpu_enable_notify) ?
+ switch ( a.cmd )
+ {
+ case HVMOP_altp2m_get_domain_state:
+ case HVMOP_altp2m_set_domain_state:
+ case HVMOP_altp2m_vcpu_enable_notify:
+ case HVMOP_altp2m_create_p2m:
+ case HVMOP_altp2m_destroy_p2m:
+ case HVMOP_altp2m_switch_p2m:
+ case HVMOP_altp2m_set_mem_access:
+ case HVMOP_altp2m_change_gfn:
+ break;
+ default:
+ return -ENOSYS;
+ }
+
+ d = ( a.cmd != HVMOP_altp2m_vcpu_enable_notify ) ?
rcu_lock_domain_by_any_id(a.domain) : rcu_lock_current_domain();
if ( d == NULL )
@@ -5430,6 +5443,9 @@ static int do_altp2m_op(
rc = p2m_change_altp2m_gfn(d, a.u.change_gfn.view,
_gfn(a.u.change_gfn.old_gfn),
_gfn(a.u.change_gfn.new_gfn));
+ break;
+ default:
+ ASSERT_UNREACHABLE();
}
out:
@@ -5954,25 +5970,6 @@ void hvm_toggle_singlestep(struct vcpu *v)
v->arch.hvm_vcpu.single_step = !v->arch.hvm_vcpu.single_step;
}
-void altp2m_vcpu_update_p2m(struct vcpu *v)
-{
- if ( hvm_funcs.altp2m_vcpu_update_p2m )
- hvm_funcs.altp2m_vcpu_update_p2m(v);
-}
-
-void altp2m_vcpu_update_vmfunc_ve(struct vcpu *v)
-{
- if ( hvm_funcs.altp2m_vcpu_update_vmfunc_ve )
- hvm_funcs.altp2m_vcpu_update_vmfunc_ve(v);
-}
-
-bool_t altp2m_vcpu_emulate_ve(struct vcpu *v)
-{
- if ( hvm_funcs.altp2m_vcpu_emulate_ve )
- return hvm_funcs.altp2m_vcpu_emulate_ve(v);
- return 0;
-}
-
int hvm_set_mode(struct vcpu *v, int mode)
{
diff --git a/xen/include/asm-x86/hvm/hvm.h b/xen/include/asm-x86/hvm/hvm.h
index 81b60d5..b1be6bd 100644
--- a/xen/include/asm-x86/hvm/hvm.h
+++ b/xen/include/asm-x86/hvm/hvm.h
@@ -100,7 +100,7 @@ struct hvm_function_table {
bool_t pvh_supported;
/* Necessary hardware support for alternate p2m's? */
- bool_t altp2m_supported;
+ bool altp2m_supported;
/* Indicate HAP capabilities. */
unsigned int hap_capabilities;
@@ -593,19 +593,35 @@ static inline bool_t hvm_is_singlestep_supported(void)
}
/* returns true if hardware supports alternate p2m's */
-static inline bool_t hvm_altp2m_supported(void)
+static inline bool hvm_altp2m_supported(void)
{
return hvm_funcs.altp2m_supported;
}
/* updates the current hardware p2m */
-void altp2m_vcpu_update_p2m(struct vcpu *v);
+static inline void altp2m_vcpu_update_p2m(struct vcpu *v)
+{
+ if ( hvm_funcs.altp2m_vcpu_update_p2m )
+ hvm_funcs.altp2m_vcpu_update_p2m(v);
+}
/* updates VMCS fields related to VMFUNC and #VE */
-void altp2m_vcpu_update_vmfunc_ve(struct vcpu *v);
+static inline void altp2m_vcpu_update_vmfunc_ve(struct vcpu *v)
+{
+ if ( hvm_funcs.altp2m_vcpu_update_vmfunc_ve )
+ hvm_funcs.altp2m_vcpu_update_vmfunc_ve(v);
+}
/* emulates #VE */
-bool_t altp2m_vcpu_emulate_ve(struct vcpu *v);
+static inline bool altp2m_vcpu_emulate_ve(struct vcpu *v)
+{
+ if ( hvm_funcs.altp2m_vcpu_emulate_ve )
+ {
+ hvm_funcs.altp2m_vcpu_emulate_ve(v);
+ return true;
+ }
+ return false;
+}
/* Check CR4/EFER values */
const char *hvm_efer_valid(const struct vcpu *v, uint64_t value,
--
2.7.4
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