KVM: Don't pre-reserve xarray entries when storing empty/NULL attributesgrafted

Skip the xarray reservation loop when clearing all memory attributes, as
storing NULL only erases the entry and never needs to allocate, so no
reservation (and no cleanup of a failed one) is required in that case.

Suggested-by: Sean Christopherson <seanjc@google.com>
Cc: David Ballesteros <davimaba.v@proton.me>
Signed-off-by: Zeng Chi <zengchi@kylinos.cn>
Link: https://patch.msgid.link/20260921102442.1232375-1-zeng_chi911@163.com
[sean: split to separate patch]
Signed-off-by: Sean Christopherson <seanjc@google.com>

1 files changed, 99 insertions, 0 deletions

diff --git a/drivers/mfd/mt6370.h b/drivers/mfd/mt6370.h
new file mode 100644
index 000000000..dd9ccc0a5
--- /dev/null
+++ b/drivers/mfd/mt6370.h
@@ -0,0 +1,99 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2022 Richtek Technology Corp.
+ *
+ * Author: ChiYuan Huang <cy_huang@richtek.com>
+ */
+
+#ifndef __MFD_MT6370_H__
+#define __MFD_MT6370_H__
+
+/* IRQ definitions */
+#define MT6370_IRQ_DIRCHGON		0
+#define MT6370_IRQ_CHG_TREG		4
+#define MT6370_IRQ_CHG_AICR		5
+#define MT6370_IRQ_CHG_MIVR		6
+#define MT6370_IRQ_PWR_RDY		7
+#define MT6370_IRQ_FL_CHG_VINOVP	11
+#define MT6370_IRQ_CHG_VSYSUV		12
+#define MT6370_IRQ_CHG_VSYSOV		13
+#define MT6370_IRQ_CHG_VBATOV		14
+#define MT6370_IRQ_CHG_VINOVPCHG	15
+#define MT6370_IRQ_TS_BAT_COLD		20
+#define MT6370_IRQ_TS_BAT_COOL		21
+#define MT6370_IRQ_TS_BAT_WARM		22
+#define MT6370_IRQ_TS_BAT_HOT		23
+#define MT6370_IRQ_TS_STATC		24
+#define MT6370_IRQ_CHG_FAULT		25
+#define MT6370_IRQ_CHG_STATC		26
+#define MT6370_IRQ_CHG_TMR		27
+#define MT6370_IRQ_CHG_BATABS		28
+#define MT6370_IRQ_CHG_ADPBAD		29
+#define MT6370_IRQ_CHG_RVP		30
+#define MT6370_IRQ_TSHUTDOWN		31
+#define MT6370_IRQ_CHG_IINMEAS		32
+#define MT6370_IRQ_CHG_ICCMEAS		33
+#define MT6370_IRQ_CHGDET_DONE		34
+#define MT6370_IRQ_WDTMR		35
+#define MT6370_IRQ_SSFINISH		36
+#define MT6370_IRQ_CHG_RECHG		37
+#define MT6370_IRQ_CHG_TERM		38
+#define MT6370_IRQ_CHG_IEOC		39
+#define MT6370_IRQ_ADC_DONE		40
+#define MT6370_IRQ_PUMPX_DONE		41
+#define MT6370_IRQ_BST_BATUV		45
+#define MT6370_IRQ_BST_MIDOV		46
+#define MT6370_IRQ_BST_OLP		47
+#define MT6370_IRQ_ATTACH		48
+#define MT6370_IRQ_DETACH		49
+#define MT6370_IRQ_HVDCP_STPDONE	51
+#define MT6370_IRQ_HVDCP_VBUSDET_DONE	52
+#define MT6370_IRQ_HVDCP_DET		53
+#define MT6370_IRQ_CHGDET		54
+#define MT6370_IRQ_DCDT			55
+#define MT6370_IRQ_DIRCHG_VGOK		59
+#define MT6370_IRQ_DIRCHG_WDTMR		60
+#define MT6370_IRQ_DIRCHG_UC		61
+#define MT6370_IRQ_DIRCHG_OC		62
+#define MT6370_IRQ_DIRCHG_OV		63
+#define MT6370_IRQ_OVPCTRL_SWON		67
+#define MT6370_IRQ_OVPCTRL_UVP_D	68
+#define MT6370_IRQ_OVPCTRL_UVP		69
+#define MT6370_IRQ_OVPCTRL_OVP_D	70
+#define MT6370_IRQ_OVPCTRL_OVP		71
+#define MT6370_IRQ_FLED_STRBPIN		72
+#define MT6370_IRQ_FLED_TORPIN		73
+#define MT6370_IRQ_FLED_TX		74
+#define MT6370_IRQ_FLED_LVF		75
+#define MT6370_IRQ_FLED2_SHORT		78
+#define MT6370_IRQ_FLED1_SHORT		79
+#define MT6370_IRQ_FLED2_STRB		80
+#define MT6370_IRQ_FLED1_STRB		81
+#define MT6370_IRQ_FLED2_STRB_TO	82
+#define MT6370_IRQ_FLED1_STRB_TO	83
+#define MT6370_IRQ_FLED2_TOR		84
+#define MT6370_IRQ_FLED1_TOR		85
+#define MT6370_IRQ_OTP			93
+#define MT6370_IRQ_VDDA_OVP		94
+#define MT6370_IRQ_VDDA_UV		95
+#define MT6370_IRQ_LDO_OC		103
+#define MT6370_IRQ_BLED_OCP		118
+#define MT6370_IRQ_BLED_OVP		119
+#define MT6370_IRQ_DSV_VNEG_OCP		123
+#define MT6370_IRQ_DSV_VPOS_OCP		124
+#define MT6370_IRQ_DSV_BST_OCP		125
+#define MT6370_IRQ_DSV_VNEG_SCP		126
+#define MT6370_IRQ_DSV_VPOS_SCP		127
+
+enum {
+	MT6370_USBC_I2C = 0,
+	MT6370_PMU_I2C,
+	MT6370_MAX_I2C
+};
+
+struct mt6370_info {
+	struct i2c_client *i2c[MT6370_MAX_I2C];
+	struct regmap_irq_chip_data *irq_data;
+};
+
+#endif /* __MFD_MT6375_H__ */