summaryrefslogtreecommitdiffstats
path: root/include
diff options
context:
space:
mode:
authorGlauber de Oliveira Costa <gcosta@redhat.com>2008-01-30 13:32:05 +0100
committerIngo Molnar <mingo@elte.hu>2008-01-30 13:32:05 +0100
commite5aaac443635c7c6f842f0bf8169f71f3236d574 (patch)
tree6be4f1a7cd3e0b1614ea2bbeefcea42d9b1fffc9 /include
parentf72a9ef979c5a828c64deb88ebba743f7d899907 (diff)
downloadop-kernel-dev-e5aaac443635c7c6f842f0bf8169f71f3236d574.zip
op-kernel-dev-e5aaac443635c7c6f842f0bf8169f71f3236d574.tar.gz
x86: provide paravirtualized hook for rdtscp
This patch adds a field in pv_cpu_ops for a paravirtualized hook for rdtscp, needed for x86_64. Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include')
-rw-r--r--include/asm-x86/paravirt.h22
1 files changed, 22 insertions, 0 deletions
diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h
index 66290f5..8f79843 100644
--- a/include/asm-x86/paravirt.h
+++ b/include/asm-x86/paravirt.h
@@ -120,6 +120,7 @@ struct pv_cpu_ops {
u64 (*read_tsc)(void);
u64 (*read_pmc)(int counter);
+ unsigned long long (*read_tscp)(unsigned int *aux);
/* These two are jmp to, not actually called. */
void (*irq_enable_syscall_ret)(void);
@@ -668,6 +669,27 @@ static inline unsigned long long paravirt_read_pmc(int counter)
high = _l >> 32; \
} while(0)
+static inline unsigned long long paravirt_rdtscp(unsigned int *aux)
+{
+ return PVOP_CALL1(u64, pv_cpu_ops.read_tscp, aux);
+}
+
+#define rdtscp(low, high, aux) \
+do { \
+ int __aux; \
+ unsigned long __val = paravirt_rdtscp(&__aux); \
+ (low) = (u32)__val; \
+ (high) = (u32)(__val >> 32); \
+ (aux) = __aux; \
+} while (0)
+
+#define rdtscpll(val, aux) \
+do { \
+ unsigned long __aux; \
+ val = paravirt_rdtscp(&__aux); \
+ (aux) = __aux; \
+} while (0)
+
static inline void load_TR_desc(void)
{
PVOP_VCALL0(pv_cpu_ops.load_tr_desc);
OpenPOWER on IntegriCloud