Re: [11/17][PATCH] kvm/ia64: add processor virtulization support.

[Akio Takebe <takebe_akio@xxxxxxxxxxxxxx>]

Hi, Xiantao and Anthony

>+void getfpreg(unsigned long regnum, struct ia64_fpreg *fpval,
>+				struct kvm_pt_regs *regs)
>+{
>+	/* Take floating register rotation into consideration*/
>+	if (regnum >= IA64_FIRST_ROTATING_FR)
>+		regnum = IA64_FIRST_ROTATING_FR + fph_index(regs,
>regnum);
>+#define CASE_FIXED_FP(reg)			\
>+	case  (reg) :				\
>+		ia64_stf_spill(fpval, reg);	\
>+	break
>+
>+	switch (regnum) {
>+		CASE_FIXED_FP(0);
>+		CASE_FIXED_FP(1);
>+		CASE_FIXED_FP(2);
>+		CASE_FIXED_FP(3);
>+		CASE_FIXED_FP(4);
>+		CASE_FIXED_FP(5);
>+
>+		CASE_FIXED_FP(6);
>+		CASE_FIXED_FP(7);
>+		CASE_FIXED_FP(8);
>+		CASE_FIXED_FP(9);
>+		CASE_FIXED_FP(10);
>+		CASE_FIXED_FP(11);
>+
Is this correct ? Though I don't know why xen do so.
In the case of Xen, the above parts are;

#define CASE_SAVED_FP(reg)                                      \
        case reg:                                               \
                fpval->u.bits[0] = regs->f##reg.u.bits[0];      \
                fpval->u.bits[1] = regs->f##reg.u.bits[1];      \
                break

                CASE_SAVED_FP(6);
                CASE_SAVED_FP(7);
                CASE_SAVED_FP(8);
                CASE_SAVED_FP(9);
                CASE_SAVED_FP(10);
                CASE_SAVED_FP(11);


>+void setfpreg(unsigned long regnum, struct ia64_fpreg *fpval,
>+					struct kvm_pt_regs *regs)
>+{
>+	/* Take floating register rotation into consideration*/
>+	if (regnum >= IA64_FIRST_ROTATING_FR)
>+		regnum = IA64_FIRST_ROTATING_FR + fph_index(regs,
>regnum);
>+
>+#define CASE_FIXED_FP(reg)			\
>+	case (reg) :				\
>+		ia64_ldf_fill(reg, fpval);	\
>+	break
>+
>+	switch (regnum) {
>+		CASE_FIXED_FP(2);
>+		CASE_FIXED_FP(3);
>+		CASE_FIXED_FP(4);
>+		CASE_FIXED_FP(5);
>+
>+		CASE_FIXED_FP(6);
>+		CASE_FIXED_FP(7);
>+		CASE_FIXED_FP(8);
>+		CASE_FIXED_FP(9);
>+		CASE_FIXED_FP(10);
>+		CASE_FIXED_FP(11);
>+
ditto.

#define CASE_RESTORED_FP(reg)                                   \
        case reg:                                               \
                regs->f##reg.u.bits[0] = fpval->u.bits[0];      \
                regs->f##reg.u.bits[1] = fpval->u.bits[1] ;     \
                break

                CASE_RESTORED_FP(6);
                CASE_RESTORED_FP(7);
                CASE_RESTORED_FP(8);
                CASE_RESTORED_FP(9);
                CASE_RESTORED_FP(10);
                CASE_RESTORED_FP(11);


Best Regards,

Akio Takebe

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