add boot partition size

hc

2023-12-11 d2ccde1c8e90d38cee87a1b0309ad2827f3fd30d

 kernel/arch/s390/include/asm/vdso.h
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@@ -2,6 +2,8 @@
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 #ifndef __S390_VDSO_H__
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 #define __S390_VDSO_H__
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+#include <vdso/datapage.h>
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+
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 /* Default link addresses for the vDSOs */
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 #define VDSO32_LBASE	0
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 #define VDSO64_LBASE	0
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@@ -18,38 +20,22 @@
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  * itself and may change without notice.
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  */
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-struct vdso_data {
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-	__u64 tb_update_count;		/* Timebase atomicity ctr	0x00 */
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-	__u64 xtime_tod_stamp;		/* TOD clock for xtime		0x08 */
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-	__u64 xtime_clock_sec;		/* Kernel time			0x10 */
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-	__u64 xtime_clock_nsec;		/*				0x18 */
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-	__u64 xtime_coarse_sec;		/* Coarse kernel time		0x20 */
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-	__u64 xtime_coarse_nsec;	/*				0x28 */
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-	__u64 wtom_clock_sec;		/* Wall to monotonic clock	0x30 */
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-	__u64 wtom_clock_nsec;		/*				0x38 */
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-	__u64 wtom_coarse_sec;		/* Coarse wall to monotonic	0x40 */
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-	__u64 wtom_coarse_nsec;		/*				0x48 */
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-	__u32 tz_minuteswest;		/* Minutes west of Greenwich	0x50 */
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-	__u32 tz_dsttime;		/* Type of dst correction	0x54 */
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-	__u32 ectg_available;		/* ECTG instruction present	0x58 */
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-	__u32 tk_mult;			/* Mult. used for xtime_nsec	0x5c */
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-	__u32 tk_shift;			/* Shift used for xtime_nsec	0x60 */
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-	__u32 ts_dir;			/* TOD steering direction	0x64 */
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-	__u64 ts_end;			/* TOD steering end		0x68 */
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-	__u32 hrtimer_res;		/* hrtimer resolution		0x70 */
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-};
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-
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 struct vdso_per_cpu_data {
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-	__u64 ectg_timer_base;
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-	__u64 ectg_user_time;
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-	__u32 cpu_nr;
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-	__u32 node_id;
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+	/*
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+	 * Note: node_id and cpu_nr must be at adjacent memory locations.
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+	 * VDSO userspace must read both values with a single instruction.
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+	 */
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+	union {
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+		__u64 getcpu_val;
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+		struct {
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+			__u32 node_id;
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+			__u32 cpu_nr;
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+		};
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+	};
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 };
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 extern struct vdso_data *vdso_data;
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-extern struct vdso_data boot_vdso_data;
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-void vdso_alloc_boot_cpu(struct lowcore *lowcore);
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 int vdso_alloc_per_cpu(struct lowcore *lowcore);
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 void vdso_free_per_cpu(struct lowcore *lowcore);
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