Hi, Isaku >Signed-off-by: Isaku Yamahata <yamahata@xxxxxxxxxxxxx> >--- > arch/ia64/xen/xenminstate.h | 148 ++++++++++++++++++++++++++++++++++++++++ >+++ > 1 files changed, 148 insertions(+), 0 deletions(-) > create mode 100644 arch/ia64/xen/xenminstate.h > >diff --git a/arch/ia64/xen/xenminstate.h b/arch/ia64/xen/xenminstate.h >new file mode 100644 >index 0000000..cdaf910 >--- /dev/null >+++ b/arch/ia64/xen/xenminstate.h >@@ -0,0 +1,148 @@ >+#include <asm/cache.h> >+ >+#ifdef CONFIG_XEN >+#include "../kernel/entry.h" >+#else >+#include "entry.h" >+#endif >+ >+#ifdef __IA64_ASM_PARAVIRTUALIZED_XEN >+/* >+ * DO_SAVE_MIN switches to the kernel stacks (if necessary) and saves >+ * the minimum state necessary that allows us to turn psr.ic back >+ * on. >+ * >+ * Assumed state upon entry: >+ * psr.ic: off >+ * r31: contains saved predicates (pr) >+ * >+ * Upon exit, the state is as follows: >+ * psr.ic: off >+ * r2 = points to &pt_regs.r16 >+ * r8 = contents of ar.ccv >+ * r9 = contents of ar.csd >+ * r10 = contents of ar.ssd >+ * r11 = FPSR_DEFAULT >+ * r12 = kernel sp (kernel virtual address) >+ * r13 = points to current task_struct (kernel virtual address) >+ * p15 = TRUE if psr.i is set in cr.ipsr >+ * predicate registers (other than p2, p3, and p15), b6, r3, r14, r15: >+ * preserved >+ * CONFIG_XEN note: p6/p7 are not preserved >+ * >+ * Note that psr.ic is NOT turned on by this macro. This is so that >+ * we can pass interruption state as arguments to a handler. >+ */ >+#define DO_SAVE_MIN(COVER,SAVE_IFS,EXTRA) \ >+ mov r16=IA64_KR(CURRENT); /* M */ \ >+ mov r27=ar.rsc; /* M */ \ >+ mov r20=r1; /* A */ \ >+ mov r25=ar.unat; /* M */ \ >+ /* mov r29=cr.ipsr; /* M */ \ >+ movl r29=XSI_IPSR;; \ >+ ld8 r29=[r29];; \ >+ mov r26=ar.pfs; /* I */ \ >+ /* mov r28=cr.iip; /* M */ \ >+ movl r28=XSI_IIP;; \ >+ ld8 r28=[r28];; \ >+ mov r21=ar.fpsr; /* M */ \ >+ COVER; /* B;; (or nothing) */ \ We may mis-read the above COVER as COVER in arch/ia64/xen/inst_xen.h. Why don't chage the name? Best Regards, Akio Takebe _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/virtualization
