From 93de2a6a4b91b72607136dd656edf03fb399d27f Mon Sep 17 00:00:00 2001 From: Sean Christopherson Date: Wed, 23 Sep 2026 09:37:21 -0700 Subject: KVM: SEV: Do cache maintenance on the source VM during intra-host migration Manually perform cache maintenance on the source VM during intra-host migration to ensure no stale data is left in CPU caches after the VM is destroyed. Because the source VM is "converted" to a non-SEV VM, KVM's memory reclaim flows won't trigger cache maintenance, e.g. when all guest memory is reclaimed in response to detaching from the mmu_notifier. Note, relying on the destination VM to do cache maintenance isn't an option as KVM doesn't require identical guest memory configurations, i.e. the source VM may have access to memory that the destination VM does not. Enforcing equivalent memory configurations is infeasible, as it would require a *deep* comparison of memslots, e.g. to verify that not only are the memslot identical, but what the memslots point at is also identical. Fixes: b56639318bb2 ("KVM: SEV: Add support for SEV intra host migration") Cc: stable@vger.kernel.org Reported-by: Stefan Teodorescu Signed-off-by: Sean Christopherson Message-ID: <20260923163721.1584779-3-seanjc@google.com> Signed-off-by: Paolo Bonzini --- drivers/clk/qcom/common.h | 92 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 92 insertions(+) create mode 100644 drivers/clk/qcom/common.h (limited to 'drivers/clk/qcom/common.h') diff --git a/drivers/clk/qcom/common.h b/drivers/clk/qcom/common.h new file mode 100644 index 000000000..6f2406f88 --- /dev/null +++ b/drivers/clk/qcom/common.h @@ -0,0 +1,92 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (c) 2014, The Linux Foundation. All rights reserved. */ + +#ifndef __QCOM_CLK_COMMON_H__ +#define __QCOM_CLK_COMMON_H__ + +struct platform_device; +struct regmap_config; +struct clk_regmap; +struct qcom_reset_map; +struct regmap; +struct freq_tbl; +struct clk_hw; + +#define PLL_LOCK_COUNT_SHIFT 8 +#define PLL_LOCK_COUNT_MASK 0x3f +#define PLL_BIAS_COUNT_SHIFT 14 +#define PLL_BIAS_COUNT_MASK 0x3f +#define PLL_VOTE_FSM_ENA BIT(20) +#define PLL_VOTE_FSM_RESET BIT(21) + +struct qcom_icc_hws_data { + int master_id; + int slave_id; + int clk_id; +}; + +struct qcom_cc_driver_data { + struct clk_alpha_pll **alpha_plls; + size_t num_alpha_plls; + const u32 *clk_cbcrs; + size_t num_clk_cbcrs; + const struct clk_rcg_dfs_data *dfs_rcgs; + size_t num_dfs_rcgs; + void (*clk_regs_configure)(struct device *dev, struct regmap *regmap); +}; + +struct qcom_cc_desc { + const struct regmap_config *config; + struct clk_regmap **clks; + size_t num_clks; + const struct qcom_reset_map *resets; + size_t num_resets; + struct gdsc **gdscs; + size_t num_gdscs; + struct clk_hw **clk_hws; + size_t num_clk_hws; + const struct qcom_icc_hws_data *icc_hws; + size_t num_icc_hws; + unsigned int icc_first_node_id; + bool use_rpm; + const struct qcom_cc_driver_data *driver_data; +}; + +/** + * struct parent_map - map table for source select configuration values + * @src: source + * @cfg: configuration value + */ +struct parent_map { + u8 src; + u8 cfg; +}; + +extern const struct freq_tbl *qcom_find_freq(const struct freq_tbl *f, + unsigned long rate); +extern const struct freq_tbl *qcom_find_freq_floor(const struct freq_tbl *f, + unsigned long rate); +extern const struct freq_multi_tbl *qcom_find_freq_multi(const struct freq_multi_tbl *f, + unsigned long rate); +extern void +qcom_pll_set_fsm_mode(struct regmap *m, u32 reg, u8 bias_count, u8 lock_count); +extern int qcom_find_src_index(struct clk_hw *hw, const struct parent_map *map, + u8 src); +extern int qcom_find_cfg_index(struct clk_hw *hw, const struct parent_map *map, + u8 cfg); + +extern int qcom_cc_register_board_clk(struct device *dev, const char *path, + const char *name, unsigned long rate); +extern int qcom_cc_register_sleep_clk(struct device *dev); + +extern struct regmap *qcom_cc_map(struct platform_device *pdev, + const struct qcom_cc_desc *desc); +extern int qcom_cc_really_probe(struct device *dev, + const struct qcom_cc_desc *desc, + struct regmap *regmap); +extern int qcom_cc_probe(struct platform_device *pdev, + const struct qcom_cc_desc *desc); +extern int qcom_cc_probe_by_index(struct platform_device *pdev, int index, + const struct qcom_cc_desc *desc); + +#endif -- cgit v1.3.1