Merge tag 'edac_updates_for_v6.16' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras

Pull EDAC updates from Borislav Petkov:

- ie31200: Add support for Raptor Lake-S and Alder Lake-S compute dies

- Rework how RRL registers per channel tracking is done in order to
support newer hardware with different RRL configurations and refactor
that code. Add support for Granite Rapids server

- i10nm: explicitly set RRL modes to fix any wrong BIOS programming

- Properly save and restore Retry Read error Log channel configuration
info on Intel drivers

- igen6: Handle correctly the case of fused off memory controllers on
Arizona Beach and Amston Lake SoCs before adding support for them

- the usual set of fixes and cleanups

* tag 'edac_updates_for_v6.16' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras:
EDAC/bluefield: Don't use bluefield_edac_readl() result on error
EDAC/i10nm: Fix the bitwise operation between variables of different sizes
EDAC/ie31200: Add two Intel SoCs for EDAC support
EDAC/{skx_common,i10nm}: Add RRL support for Intel Granite Rapids server
EDAC/{skx_common,i10nm}: Refactor show_retry_rd_err_log()
EDAC/{skx_common,i10nm}: Refactor enable_retry_rd_err_log()
EDAC/{skx_common,i10nm}: Structure the per-channel RRL registers
EDAC/i10nm: Explicitly set the modes of the RRL register sets
EDAC/{skx_common,i10nm}: Fix the loss of saved RRL for HBM pseudo channel 0
EDAC/skx_common: Fix general protection fault
EDAC/igen6: Add Intel Amston Lake SoCs support
EDAC/igen6: Add Intel Arizona Beach SoCs support
EDAC/igen6: Skip absent memory controllers

drivers/edac/bluefield_edac.c

···
 	 * error without the detailed information.
 	 */
 	err = bluefield_edac_readl(priv, MLXBF_SYNDROM, &dram_syndrom);
-	if (err)
+	if (err) {
 		dev_err(priv->dev, "DRAM syndrom read failed.\n");
+		return;
+	}
 
 	serr = FIELD_GET(MLXBF_SYNDROM__SERR, dram_syndrom);
 	derr = FIELD_GET(MLXBF_SYNDROM__DERR, dram_syndrom);
···
 	}
 
 	err = bluefield_edac_readl(priv, MLXBF_ADD_INFO, &dram_additional_info);
-	if (err)
+	if (err) {
 		dev_err(priv->dev, "DRAM additional info read failed.\n");
+		return;
+	}
 
 	err_prank = FIELD_GET(MLXBF_ADD_INFO__ERR_PRANK, dram_additional_info);
 
 	ecc_dimm = (err_prank >= 2 && priv->dimm_ranks[0] <= 2) ? 1 : 0;
 
 	err = bluefield_edac_readl(priv, MLXBF_ERR_ADDR_0, &edea0);
-	if (err)
+	if (err) {
 		dev_err(priv->dev, "Error addr 0 read failed.\n");
+		return;
+	}
 
 	err = bluefield_edac_readl(priv, MLXBF_ERR_ADDR_1, &edea1);
-	if (err)
+	if (err) {
 		dev_err(priv->dev, "Error addr 1 read failed.\n");
+		return;
+	}
 
 	ecc_dimm_addr = ((u64)edea1 << 32) | edea0;
 
···
 		return;
 
 	err = bluefield_edac_readl(priv, MLXBF_ECC_CNT, &ecc_count);
-	if (err)
+	if (err) {
 		dev_err(priv->dev, "ECC count read failed.\n");
+		return;
+	}
 
 	single_error_count = FIELD_GET(MLXBF_ECC_CNT__SERR_CNT, ecc_count);
 	double_error_count = FIELD_GET(MLXBF_ECC_CNT__DERR_CNT, ecc_count);

drivers/edac/i10nm_base.c

···
 #define I10NM_SAD_ENABLE(reg)		GET_BITFIELD(reg, 0, 0)
 #define I10NM_SAD_NM_CACHEABLE(reg)	GET_BITFIELD(reg, 5, 5)
 
-#define RETRY_RD_ERR_LOG_UC		BIT(1)
-#define RETRY_RD_ERR_LOG_NOOVER		BIT(14)
-#define RETRY_RD_ERR_LOG_EN		BIT(15)
-#define RETRY_RD_ERR_LOG_NOOVER_UC	(BIT(14) | BIT(1))
-#define RETRY_RD_ERR_LOG_OVER_UC_V	(BIT(2) | BIT(1) | BIT(0))
-
 static struct list_head *i10nm_edac_list;
 
 static struct res_config *res_cfg;
···
 static int decoding_via_mca;
 static bool mem_cfg_2lm;
 
-static u32 offsets_scrub_icx[]  = {0x22c60, 0x22c54, 0x22c5c, 0x22c58, 0x22c28, 0x20ed8};
-static u32 offsets_scrub_spr[]  = {0x22c60, 0x22c54, 0x22f08, 0x22c58, 0x22c28, 0x20ed8};
-static u32 offsets_scrub_spr_hbm0[]  = {0x2860, 0x2854, 0x2b08, 0x2858, 0x2828, 0x0ed8};
-static u32 offsets_scrub_spr_hbm1[]  = {0x2c60, 0x2c54, 0x2f08, 0x2c58, 0x2c28, 0x0fa8};
-static u32 offsets_demand_icx[] = {0x22e54, 0x22e60, 0x22e64, 0x22e58, 0x22e5c, 0x20ee0};
-static u32 offsets_demand_spr[] = {0x22e54, 0x22e60, 0x22f10, 0x22e58, 0x22e5c, 0x20ee0};
-static u32 offsets_demand2_spr[] = {0x22c70, 0x22d80, 0x22f18, 0x22d58, 0x22c64, 0x20f10};
-static u32 offsets_demand_spr_hbm0[] = {0x2a54, 0x2a60, 0x2b10, 0x2a58, 0x2a5c, 0x0ee0};
-static u32 offsets_demand_spr_hbm1[] = {0x2e54, 0x2e60, 0x2f10, 0x2e58, 0x2e5c, 0x0fb0};
+static struct reg_rrl icx_reg_rrl_ddr = {
+	.set_num = 2,
+	.reg_num = 6,
+	.modes = {LRE_SCRUB, LRE_DEMAND},
+	.offsets = {
+		{0x22c60, 0x22c54, 0x22c5c, 0x22c58, 0x22c28, 0x20ed8},
+		{0x22e54, 0x22e60, 0x22e64, 0x22e58, 0x22e5c, 0x20ee0},
+	},
+	.widths		= {4, 4, 4, 4, 4, 8},
+	.v_mask		= BIT(0),
+	.uc_mask	= BIT(1),
+	.over_mask	= BIT(2),
+	.en_patspr_mask	= BIT(13),
+	.noover_mask	= BIT(14),
+	.en_mask	= BIT(15),
 
-static void __enable_retry_rd_err_log(struct skx_imc *imc, int chan, bool enable,
-				      u32 *offsets_scrub, u32 *offsets_demand,
-				      u32 *offsets_demand2)
+	.cecnt_num	= 4,
+	.cecnt_offsets	= {0x22c18, 0x22c1c, 0x22c20, 0x22c24},
+	.cecnt_widths	= {4, 4, 4, 4},
+};
+
+static struct reg_rrl spr_reg_rrl_ddr = {
+	.set_num = 3,
+	.reg_num = 6,
+	.modes = {LRE_SCRUB, LRE_DEMAND, FRE_DEMAND},
+	.offsets = {
+		{0x22c60, 0x22c54, 0x22f08, 0x22c58, 0x22c28, 0x20ed8},
+		{0x22e54, 0x22e60, 0x22f10, 0x22e58, 0x22e5c, 0x20ee0},
+		{0x22c70, 0x22d80, 0x22f18, 0x22d58, 0x22c64, 0x20f10},
+	},
+	.widths		= {4, 4, 8, 4, 4, 8},
+	.v_mask		= BIT(0),
+	.uc_mask	= BIT(1),
+	.over_mask	= BIT(2),
+	.en_patspr_mask	= BIT(13),
+	.noover_mask	= BIT(14),
+	.en_mask	= BIT(15),
+
+	.cecnt_num	= 4,
+	.cecnt_offsets	= {0x22c18, 0x22c1c, 0x22c20, 0x22c24},
+	.cecnt_widths	= {4, 4, 4, 4},
+};
+
+static struct reg_rrl spr_reg_rrl_hbm_pch0 = {
+	.set_num = 2,
+	.reg_num = 6,
+	.modes = {LRE_SCRUB, LRE_DEMAND},
+	.offsets = {
+		{0x2860, 0x2854, 0x2b08, 0x2858, 0x2828, 0x0ed8},
+		{0x2a54, 0x2a60, 0x2b10, 0x2a58, 0x2a5c, 0x0ee0},
+	},
+	.widths		= {4, 4, 8, 4, 4, 8},
+	.v_mask		= BIT(0),
+	.uc_mask	= BIT(1),
+	.over_mask	= BIT(2),
+	.en_patspr_mask	= BIT(13),
+	.noover_mask	= BIT(14),
+	.en_mask	= BIT(15),
+
+	.cecnt_num	= 4,
+	.cecnt_offsets	= {0x2818, 0x281c, 0x2820, 0x2824},
+	.cecnt_widths	= {4, 4, 4, 4},
+};
+
+static struct reg_rrl spr_reg_rrl_hbm_pch1 = {
+	.set_num = 2,
+	.reg_num = 6,
+	.modes = {LRE_SCRUB, LRE_DEMAND},
+	.offsets = {
+		{0x2c60, 0x2c54, 0x2f08, 0x2c58, 0x2c28, 0x0fa8},
+		{0x2e54, 0x2e60, 0x2f10, 0x2e58, 0x2e5c, 0x0fb0},
+	},
+	.widths		= {4, 4, 8, 4, 4, 8},
+	.v_mask		= BIT(0),
+	.uc_mask	= BIT(1),
+	.over_mask	= BIT(2),
+	.en_patspr_mask	= BIT(13),
+	.noover_mask	= BIT(14),
+	.en_mask	= BIT(15),
+
+	.cecnt_num	= 4,
+	.cecnt_offsets	= {0x2c18, 0x2c1c, 0x2c20, 0x2c24},
+	.cecnt_widths	= {4, 4, 4, 4},
+};
+
+static struct reg_rrl gnr_reg_rrl_ddr = {
+	.set_num = 4,
+	.reg_num = 6,
+	.modes = {FRE_SCRUB, FRE_DEMAND, LRE_SCRUB, LRE_DEMAND},
+	.offsets = {
+		{0x2f10, 0x2f20, 0x2f30, 0x2f50, 0x2f60, 0xba0},
+		{0x2f14, 0x2f24, 0x2f38, 0x2f54, 0x2f64, 0xba8},
+		{0x2f18, 0x2f28, 0x2f40, 0x2f58, 0x2f68, 0xbb0},
+		{0x2f1c, 0x2f2c, 0x2f48, 0x2f5c, 0x2f6c, 0xbb8},
+	},
+	.widths		= {4, 4, 8, 4, 4, 8},
+	.v_mask		= BIT(0),
+	.uc_mask	= BIT(1),
+	.over_mask	= BIT(2),
+	.en_patspr_mask	= BIT(14),
+	.noover_mask	= BIT(15),
+	.en_mask	= BIT(12),
+
+	.cecnt_num	= 8,
+	.cecnt_offsets	= {0x2c10, 0x2c14, 0x2c18, 0x2c1c, 0x2c20, 0x2c24, 0x2c28, 0x2c2c},
+	.cecnt_widths	= {4, 4, 4, 4, 4, 4, 4, 4},
+};
+
+static u64 read_imc_reg(struct skx_imc *imc, int chan, u32 offset, u8 width)
 {
-	u32 s, d, d2;
+	switch (width) {
+	case 4:
+		return I10NM_GET_REG32(imc, chan, offset);
+	case 8:
+		return I10NM_GET_REG64(imc, chan, offset);
+	default:
+		i10nm_printk(KERN_ERR, "Invalid readd RRL 0x%x width %d\n", offset, width);
+		return 0;
+	}
+}
 
-	s = I10NM_GET_REG32(imc, chan, offsets_scrub[0]);
-	d = I10NM_GET_REG32(imc, chan, offsets_demand[0]);
-	if (offsets_demand2)
-		d2 = I10NM_GET_REG32(imc, chan, offsets_demand2[0]);
+static void write_imc_reg(struct skx_imc *imc, int chan, u32 offset, u8 width, u64 val)
+{
+	switch (width) {
+	case 4:
+		return I10NM_SET_REG32(imc, chan, offset, (u32)val);
+	default:
+		i10nm_printk(KERN_ERR, "Invalid write RRL 0x%x width %d\n", offset, width);
+	}
+}
+
+static void enable_rrl(struct skx_imc *imc, int chan, struct reg_rrl *rrl,
+		       int rrl_set, bool enable, u32 *rrl_ctl)
+{
+	enum rrl_mode mode = rrl->modes[rrl_set];
+	u32 offset = rrl->offsets[rrl_set][0], v;
+	u8 width = rrl->widths[0];
+	bool first, scrub;
+
+	/* First or last read error. */
+	first = (mode == FRE_SCRUB || mode == FRE_DEMAND);
+	/* Patrol scrub or on-demand read error. */
+	scrub = (mode == FRE_SCRUB || mode == LRE_SCRUB);
+
+	v = read_imc_reg(imc, chan, offset, width);
 
 	if (enable) {
-		/* Save default configurations */
-		imc->chan[chan].retry_rd_err_log_s = s;
-		imc->chan[chan].retry_rd_err_log_d = d;
-		if (offsets_demand2)
-			imc->chan[chan].retry_rd_err_log_d2 = d2;
+		/* Save default configurations. */
+		*rrl_ctl = v;
+		v &= ~rrl->uc_mask;
 
-		s &= ~RETRY_RD_ERR_LOG_NOOVER_UC;
-		s |=  RETRY_RD_ERR_LOG_EN;
-		d &= ~RETRY_RD_ERR_LOG_NOOVER_UC;
-		d |=  RETRY_RD_ERR_LOG_EN;
+		if (first)
+			v |= rrl->noover_mask;
+		else
+			v &= ~rrl->noover_mask;
 
-		if (offsets_demand2) {
-			d2 &= ~RETRY_RD_ERR_LOG_UC;
-			d2 |=  RETRY_RD_ERR_LOG_NOOVER;
-			d2 |=  RETRY_RD_ERR_LOG_EN;
-		}
+		if (scrub)
+			v |= rrl->en_patspr_mask;
+		else
+			v &= ~rrl->en_patspr_mask;
+
+		v |= rrl->en_mask;
 	} else {
-		/* Restore default configurations */
-		if (imc->chan[chan].retry_rd_err_log_s & RETRY_RD_ERR_LOG_UC)
-			s |=  RETRY_RD_ERR_LOG_UC;
-		if (imc->chan[chan].retry_rd_err_log_s & RETRY_RD_ERR_LOG_NOOVER)
-			s |=  RETRY_RD_ERR_LOG_NOOVER;
-		if (!(imc->chan[chan].retry_rd_err_log_s & RETRY_RD_ERR_LOG_EN))
-			s &= ~RETRY_RD_ERR_LOG_EN;
-		if (imc->chan[chan].retry_rd_err_log_d & RETRY_RD_ERR_LOG_UC)
-			d |=  RETRY_RD_ERR_LOG_UC;
-		if (imc->chan[chan].retry_rd_err_log_d & RETRY_RD_ERR_LOG_NOOVER)
-			d |=  RETRY_RD_ERR_LOG_NOOVER;
-		if (!(imc->chan[chan].retry_rd_err_log_d & RETRY_RD_ERR_LOG_EN))
-			d &= ~RETRY_RD_ERR_LOG_EN;
+		/* Restore default configurations. */
+		if (*rrl_ctl & rrl->uc_mask)
+			v |= rrl->uc_mask;
 
-		if (offsets_demand2) {
-			if (imc->chan[chan].retry_rd_err_log_d2 & RETRY_RD_ERR_LOG_UC)
-				d2 |=  RETRY_RD_ERR_LOG_UC;
-			if (!(imc->chan[chan].retry_rd_err_log_d2 & RETRY_RD_ERR_LOG_NOOVER))
-				d2 &=  ~RETRY_RD_ERR_LOG_NOOVER;
-			if (!(imc->chan[chan].retry_rd_err_log_d2 & RETRY_RD_ERR_LOG_EN))
-				d2 &= ~RETRY_RD_ERR_LOG_EN;
+		if (first) {
+			if (!(*rrl_ctl & rrl->noover_mask))
+				v &= ~rrl->noover_mask;
+		} else {
+			if (*rrl_ctl & rrl->noover_mask)
+				v |= rrl->noover_mask;
 		}
+
+		if (scrub) {
+			if (!(*rrl_ctl & rrl->en_patspr_mask))
+				v &= ~rrl->en_patspr_mask;
+		} else {
+			if (*rrl_ctl & rrl->en_patspr_mask)
+				v |= rrl->en_patspr_mask;
+		}
+
+		if (!(*rrl_ctl & rrl->en_mask))
+			v &= ~rrl->en_mask;
 	}
 
-	I10NM_SET_REG32(imc, chan, offsets_scrub[0], s);
-	I10NM_SET_REG32(imc, chan, offsets_demand[0], d);
-	if (offsets_demand2)
-		I10NM_SET_REG32(imc, chan, offsets_demand2[0], d2);
+	write_imc_reg(imc, chan, offset, width, v);
+}
+
+static void enable_rrls(struct skx_imc *imc, int chan, struct reg_rrl *rrl,
+			bool enable, u32 *rrl_ctl)
+{
+	for (int i = 0; i < rrl->set_num; i++)
+		enable_rrl(imc, chan, rrl, i, enable, rrl_ctl + i);
+}
+
+static void enable_rrls_ddr(struct skx_imc *imc, bool enable)
+{
+	struct reg_rrl *rrl_ddr = res_cfg->reg_rrl_ddr;
+	int i, chan_num = res_cfg->ddr_chan_num;
+	struct skx_channel *chan = imc->chan;
+
+	if (!imc->mbase)
+		return;
+
+	for (i = 0; i < chan_num; i++)
+		enable_rrls(imc, i, rrl_ddr, enable, chan[i].rrl_ctl[0]);
+}
+
+static void enable_rrls_hbm(struct skx_imc *imc, bool enable)
+{
+	struct reg_rrl **rrl_hbm = res_cfg->reg_rrl_hbm;
+	int i, chan_num = res_cfg->hbm_chan_num;
+	struct skx_channel *chan = imc->chan;
+
+	if (!imc->mbase || !imc->hbm_mc || !rrl_hbm[0] || !rrl_hbm[1])
+		return;
+
+	for (i = 0; i < chan_num; i++) {
+		enable_rrls(imc, i, rrl_hbm[0], enable, chan[i].rrl_ctl[0]);
+		enable_rrls(imc, i, rrl_hbm[1], enable, chan[i].rrl_ctl[1]);
+	}
 }
 
 static void enable_retry_rd_err_log(bool enable)
 {
-	int i, j, imc_num, chan_num;
-	struct skx_imc *imc;
 	struct skx_dev *d;
+	int i, imc_num;
 
 	edac_dbg(2, "\n");
 
 	list_for_each_entry(d, i10nm_edac_list, list) {
 		imc_num  = res_cfg->ddr_imc_num;
-		chan_num = res_cfg->ddr_chan_num;
-
-		for (i = 0; i < imc_num; i++) {
-			imc = &d->imc[i];
-			if (!imc->mbase)
-				continue;
-
-			for (j = 0; j < chan_num; j++)
-				__enable_retry_rd_err_log(imc, j, enable,
-							  res_cfg->offsets_scrub,
-							  res_cfg->offsets_demand,
-							  res_cfg->offsets_demand2);
-		}
+		for (i = 0; i < imc_num; i++)
+			enable_rrls_ddr(&d->imc[i], enable);
 
 		imc_num += res_cfg->hbm_imc_num;
-		chan_num = res_cfg->hbm_chan_num;
-
-		for (; i < imc_num; i++) {
-			imc = &d->imc[i];
-			if (!imc->mbase || !imc->hbm_mc)
-				continue;
-
-			for (j = 0; j < chan_num; j++) {
-				__enable_retry_rd_err_log(imc, j, enable,
-							  res_cfg->offsets_scrub_hbm0,
-							  res_cfg->offsets_demand_hbm0,
-							  NULL);
-				__enable_retry_rd_err_log(imc, j, enable,
-							  res_cfg->offsets_scrub_hbm1,
-							  res_cfg->offsets_demand_hbm1,
-							  NULL);
-			}
-		}
+		for (; i < imc_num; i++)
+			enable_rrls_hbm(&d->imc[i], enable);
 	}
 }
 
 static void show_retry_rd_err_log(struct decoded_addr *res, char *msg,
 				  int len, bool scrub_err)
 {
+	int i, j, n, ch = res->channel, pch = res->cs & 1;
 	struct skx_imc *imc = &res->dev->imc[res->imc];
-	u32 log0, log1, log2, log3, log4;
-	u32 corr0, corr1, corr2, corr3;
-	u32 lxg0, lxg1, lxg3, lxg4;
-	u32 *xffsets = NULL;
-	u64 log2a, log5;
-	u64 lxg2a, lxg5;
-	u32 *offsets;
-	int n, pch;
+	u64 log, corr, status_mask;
+	struct reg_rrl *rrl;
+	bool scrub;
+	u32 offset;
+	u8 width;
 
 	if (!imc->mbase)
 		return;
 
-	if (imc->hbm_mc) {
-		pch = res->cs & 1;
+	rrl = imc->hbm_mc ? res_cfg->reg_rrl_hbm[pch] : res_cfg->reg_rrl_ddr;
 
-		if (pch)
-			offsets = scrub_err ? res_cfg->offsets_scrub_hbm1 :
-					      res_cfg->offsets_demand_hbm1;
-		else
-			offsets = scrub_err ? res_cfg->offsets_scrub_hbm0 :
-					      res_cfg->offsets_demand_hbm0;
-	} else {
-		if (scrub_err) {
-			offsets = res_cfg->offsets_scrub;
-		} else {
-			offsets = res_cfg->offsets_demand;
-			xffsets = res_cfg->offsets_demand2;
+	if (!rrl)
+		return;
+
+	status_mask = rrl->over_mask | rrl->uc_mask | rrl->v_mask;
+
+	n = snprintf(msg, len, " retry_rd_err_log[");
+	for (i = 0; i < rrl->set_num; i++) {
+		scrub = (rrl->modes[i] == FRE_SCRUB || rrl->modes[i] == LRE_SCRUB);
+		if (scrub_err != scrub)
+			continue;
+
+		for (j = 0; j < rrl->reg_num && len - n > 0; j++) {
+			offset = rrl->offsets[i][j];
+			width = rrl->widths[j];
+			log = read_imc_reg(imc, ch, offset, width);
+
+			if (width == 4)
+				n += snprintf(msg + n, len - n, "%.8llx ", log);
+			else
+				n += snprintf(msg + n, len - n, "%.16llx ", log);
+
+			/* Clear RRL status if RRL in Linux control mode. */
+			if (retry_rd_err_log == 2 && !j && (log & status_mask))
+				write_imc_reg(imc, ch, offset, width, log & ~status_mask);
 		}
 	}
 
-	log0 = I10NM_GET_REG32(imc, res->channel, offsets[0]);
-	log1 = I10NM_GET_REG32(imc, res->channel, offsets[1]);
-	log3 = I10NM_GET_REG32(imc, res->channel, offsets[3]);
-	log4 = I10NM_GET_REG32(imc, res->channel, offsets[4]);
-	log5 = I10NM_GET_REG64(imc, res->channel, offsets[5]);
+	/* Move back one space. */
+	n--;
+	n += snprintf(msg + n, len - n, "]");
 
-	if (xffsets) {
-		lxg0 = I10NM_GET_REG32(imc, res->channel, xffsets[0]);
-		lxg1 = I10NM_GET_REG32(imc, res->channel, xffsets[1]);
-		lxg3 = I10NM_GET_REG32(imc, res->channel, xffsets[3]);
-		lxg4 = I10NM_GET_REG32(imc, res->channel, xffsets[4]);
-		lxg5 = I10NM_GET_REG64(imc, res->channel, xffsets[5]);
-	}
+	if (len - n > 0) {
+		n += snprintf(msg + n, len - n, " correrrcnt[");
+		for (i = 0; i < rrl->cecnt_num && len - n > 0; i++) {
+			offset = rrl->cecnt_offsets[i];
+			width = rrl->cecnt_widths[i];
+			corr = read_imc_reg(imc, ch, offset, width);
 
-	if (res_cfg->type == SPR) {
-		log2a = I10NM_GET_REG64(imc, res->channel, offsets[2]);
-		n = snprintf(msg, len, " retry_rd_err_log[%.8x %.8x %.16llx %.8x %.8x %.16llx",
-			     log0, log1, log2a, log3, log4, log5);
-
-		if (len - n > 0) {
-			if (xffsets) {
-				lxg2a = I10NM_GET_REG64(imc, res->channel, xffsets[2]);
-				n += snprintf(msg + n, len - n, " %.8x %.8x %.16llx %.8x %.8x %.16llx]",
-					     lxg0, lxg1, lxg2a, lxg3, lxg4, lxg5);
+			/* CPUs {ICX,SPR} encode two counters per 4-byte CORRERRCNT register. */
+			if (res_cfg->type <= SPR) {
+				n += snprintf(msg + n, len - n, "%.4llx %.4llx ",
+					      corr & 0xffff, corr >> 16);
 			} else {
-				n += snprintf(msg + n, len - n, "]");
+			/* CPUs {GNR} encode one counter per CORRERRCNT register. */
+				if (width == 4)
+					n += snprintf(msg + n, len - n, "%.8llx ", corr);
+				else
+					n += snprintf(msg + n, len - n, "%.16llx ", corr);
 			}
 		}
-	} else {
-		log2 = I10NM_GET_REG32(imc, res->channel, offsets[2]);
-		n = snprintf(msg, len, " retry_rd_err_log[%.8x %.8x %.8x %.8x %.8x %.16llx]",
-			     log0, log1, log2, log3, log4, log5);
-	}
 
-	if (imc->hbm_mc) {
-		if (pch) {
-			corr0 = I10NM_GET_REG32(imc, res->channel, 0x2c18);
-			corr1 = I10NM_GET_REG32(imc, res->channel, 0x2c1c);
-			corr2 = I10NM_GET_REG32(imc, res->channel, 0x2c20);
-			corr3 = I10NM_GET_REG32(imc, res->channel, 0x2c24);
-		} else {
-			corr0 = I10NM_GET_REG32(imc, res->channel, 0x2818);
-			corr1 = I10NM_GET_REG32(imc, res->channel, 0x281c);
-			corr2 = I10NM_GET_REG32(imc, res->channel, 0x2820);
-			corr3 = I10NM_GET_REG32(imc, res->channel, 0x2824);
-		}
-	} else {
-		corr0 = I10NM_GET_REG32(imc, res->channel, 0x22c18);
-		corr1 = I10NM_GET_REG32(imc, res->channel, 0x22c1c);
-		corr2 = I10NM_GET_REG32(imc, res->channel, 0x22c20);
-		corr3 = I10NM_GET_REG32(imc, res->channel, 0x22c24);
-	}
-
-	if (len - n > 0)
-		snprintf(msg + n, len - n,
-			 " correrrcnt[%.4x %.4x %.4x %.4x %.4x %.4x %.4x %.4x]",
-			 corr0 & 0xffff, corr0 >> 16,
-			 corr1 & 0xffff, corr1 >> 16,
-			 corr2 & 0xffff, corr2 >> 16,
-			 corr3 & 0xffff, corr3 >> 16);
-
-	/* Clear status bits */
-	if (retry_rd_err_log == 2) {
-		if (log0 & RETRY_RD_ERR_LOG_OVER_UC_V) {
-			log0 &= ~RETRY_RD_ERR_LOG_OVER_UC_V;
-			I10NM_SET_REG32(imc, res->channel, offsets[0], log0);
-		}
-
-		if (xffsets && (lxg0 & RETRY_RD_ERR_LOG_OVER_UC_V)) {
-			lxg0 &= ~RETRY_RD_ERR_LOG_OVER_UC_V;
-			I10NM_SET_REG32(imc, res->channel, xffsets[0], lxg0);
-		}
+		/* Move back one space. */
+		n--;
+		n += snprintf(msg + n, len - n, "]");
 	}
 }
 
···
 	.ddr_mdev_bdf		= {0, 12, 0},
 	.hbm_mdev_bdf		= {0, 12, 1},
 	.sad_all_offset		= 0x108,
-	.offsets_scrub		= offsets_scrub_icx,
-	.offsets_demand		= offsets_demand_icx,
+	.reg_rrl_ddr		= &icx_reg_rrl_ddr,
 };
 
 static struct res_config i10nm_cfg1 = {
···
 	.ddr_mdev_bdf		= {0, 12, 0},
 	.hbm_mdev_bdf		= {0, 12, 1},
 	.sad_all_offset		= 0x108,
-	.offsets_scrub		= offsets_scrub_icx,
-	.offsets_demand		= offsets_demand_icx,
+	.reg_rrl_ddr		= &icx_reg_rrl_ddr,
 };
 
 static struct res_config spr_cfg = {
···
 	.ddr_mdev_bdf		= {0, 12, 0},
 	.hbm_mdev_bdf		= {0, 12, 1},
 	.sad_all_offset		= 0x300,
-	.offsets_scrub		= offsets_scrub_spr,
-	.offsets_scrub_hbm0	= offsets_scrub_spr_hbm0,
-	.offsets_scrub_hbm1	= offsets_scrub_spr_hbm1,
-	.offsets_demand		= offsets_demand_spr,
-	.offsets_demand2	= offsets_demand2_spr,
-	.offsets_demand_hbm0	= offsets_demand_spr_hbm0,
-	.offsets_demand_hbm1	= offsets_demand_spr_hbm1,
+	.reg_rrl_ddr		= &spr_reg_rrl_ddr,
+	.reg_rrl_hbm[0]		= &spr_reg_rrl_hbm_pch0,
+	.reg_rrl_hbm[1]		= &spr_reg_rrl_hbm_pch1,
 };
 
 static struct res_config gnr_cfg = {
···
 	.uracu_bdf		= {0, 0, 1},
 	.ddr_mdev_bdf		= {0, 5, 1},
 	.sad_all_offset		= 0x300,
+	.reg_rrl_ddr		= &gnr_reg_rrl_ddr,
 };
 
 static const struct x86_cpu_id i10nm_cpuids[] = {
···
 	mce_register_decode_chain(&i10nm_mce_dec);
 	skx_setup_debug("i10nm_test");
 
-	if (retry_rd_err_log && res_cfg->offsets_scrub && res_cfg->offsets_demand) {
+	if (retry_rd_err_log && res_cfg->reg_rrl_ddr) {
 		skx_set_decode(i10nm_mc_decode, show_retry_rd_err_log);
 		if (retry_rd_err_log == 2)
 			enable_retry_rd_err_log(true);
···
 {
 	edac_dbg(2, "\n");
 
-	if (retry_rd_err_log && res_cfg->offsets_scrub && res_cfg->offsets_demand) {
+	if (retry_rd_err_log && res_cfg->reg_rrl_ddr) {
 		skx_set_decode(NULL, NULL);
 		if (retry_rd_err_log == 2)
 			enable_retry_rd_err_log(false);

drivers/edac/ie31200_edac.c

···
 #define PCI_DEVICE_ID_INTEL_IE31200_RPL_S_1	0xa703
 #define PCI_DEVICE_ID_INTEL_IE31200_RPL_S_2	0x4640
 #define PCI_DEVICE_ID_INTEL_IE31200_RPL_S_3	0x4630
+#define PCI_DEVICE_ID_INTEL_IE31200_RPL_S_4	0xa700
+
+/* Alder Lake-S */
+#define PCI_DEVICE_ID_INTEL_IE31200_ADL_S_1	0x4660
 
 #define IE31200_RANKS_PER_CHANNEL	8
 #define IE31200_DIMMS_PER_CHANNEL	2
···
 	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IE31200_RPL_S_1), (kernel_ulong_t)&rpl_s_cfg},
 	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IE31200_RPL_S_2), (kernel_ulong_t)&rpl_s_cfg},
 	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IE31200_RPL_S_3), (kernel_ulong_t)&rpl_s_cfg},
+	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IE31200_RPL_S_4), (kernel_ulong_t)&rpl_s_cfg},
+	{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IE31200_ADL_S_1), (kernel_ulong_t)&rpl_s_cfg},
 	{ 0, } /* 0 terminated list. */
 };
 MODULE_DEVICE_TABLE(pci, ie31200_pci_tbl);

drivers/edac/igen6_edac.c

···
 
 static const struct res_config {
 	bool machine_check;
+	/* The number of present memory controllers. */
 	int num_imc;
 	u32 imc_base;
 	u32 cmf_base;
···
 #define DID_ADL_N_SKU10	0x4679
 #define DID_ADL_N_SKU11	0x467c
 #define DID_ADL_N_SKU12	0x4632
+
+/* Compute die IDs for Arizona Beach with IBECC */
+#define DID_AZB_SKU1	0x4676
+
+/* Compute did IDs for Amston Lake with IBECC */
+#define DID_ASL_SKU1	0x464a
 
 /* Compute die IDs for Raptor Lake-P with IBECC */
 #define DID_RPL_P_SKU1	0xa706
···
 	{ PCI_VDEVICE(INTEL, DID_ADL_N_SKU10), (kernel_ulong_t)&adl_n_cfg },
 	{ PCI_VDEVICE(INTEL, DID_ADL_N_SKU11), (kernel_ulong_t)&adl_n_cfg },
 	{ PCI_VDEVICE(INTEL, DID_ADL_N_SKU12), (kernel_ulong_t)&adl_n_cfg },
+	{ PCI_VDEVICE(INTEL, DID_AZB_SKU1), (kernel_ulong_t)&adl_n_cfg },
+	{ PCI_VDEVICE(INTEL, DID_ASL_SKU1), (kernel_ulong_t)&adl_n_cfg },
 	{ PCI_VDEVICE(INTEL, DID_RPL_P_SKU1), (kernel_ulong_t)&rpl_p_cfg },
 	{ PCI_VDEVICE(INTEL, DID_RPL_P_SKU2), (kernel_ulong_t)&rpl_p_cfg },
 	{ PCI_VDEVICE(INTEL, DID_RPL_P_SKU3), (kernel_ulong_t)&rpl_p_cfg },
···
 		irq_work_queue(&ecclog_irq_work);
 }
 
-static int igen6_register_mci(int mc, u64 mchbar, struct pci_dev *pdev)
+/* Check whether the memory controller is absent. */
+static bool igen6_imc_absent(void __iomem *window)
+{
+	return readl(window + MAD_INTER_CHANNEL_OFFSET) == ~0;
+}
+
+static int igen6_register_mci(int mc, void __iomem *window, struct pci_dev *pdev)
 {
 	struct edac_mc_layer layers[2];
 	struct mem_ctl_info *mci;
 	struct igen6_imc *imc;
-	void __iomem *window;
 	int rc;
 
 	edac_dbg(2, "\n");
-
-	mchbar += mc * MCHBAR_SIZE;
-	window = ioremap(mchbar, MCHBAR_SIZE);
-	if (!window) {
-		igen6_printk(KERN_ERR, "Failed to ioremap 0x%llx\n", mchbar);
-		return -ENODEV;
-	}
 
 	layers[0].type = EDAC_MC_LAYER_CHANNEL;
 	layers[0].size = NUM_CHANNELS;
···
 fail2:
 	edac_mc_free(mci);
 fail:
-	iounmap(window);
 	return rc;
 }
 
···
 		edac_mc_free(mci);
 		iounmap(imc->window);
 	}
+}
+
+static int igen6_register_mcis(struct pci_dev *pdev, u64 mchbar)
+{
+	void __iomem *window;
+	int lmc, pmc, rc;
+	u64 base;
+
+	for (lmc = 0, pmc = 0; pmc < NUM_IMC; pmc++) {
+		base   = mchbar + pmc * MCHBAR_SIZE;
+		window = ioremap(base, MCHBAR_SIZE);
+		if (!window) {
+			igen6_printk(KERN_ERR, "Failed to ioremap 0x%llx for mc%d\n", base, pmc);
+			rc = -ENOMEM;
+			goto out_unregister_mcis;
+		}
+
+		if (igen6_imc_absent(window)) {
+			iounmap(window);
+			edac_dbg(2, "Skip absent mc%d\n", pmc);
+			continue;
+		}
+
+		rc = igen6_register_mci(lmc, window, pdev);
+		if (rc)
+			goto out_iounmap;
+
+		/* Done, if all present MCs are detected and registered. */
+		if (++lmc >= res_cfg->num_imc)
+			break;
+	}
+
+	if (!lmc) {
+		igen6_printk(KERN_ERR, "No mc found.\n");
+		return -ENODEV;
+	}
+
+	if (lmc < res_cfg->num_imc)
+		igen6_printk(KERN_WARNING, "Expected %d mcs, but only %d detected.",
+			     res_cfg->num_imc, lmc);
+
+	return 0;
+
+out_iounmap:
+	iounmap(window);
+
+out_unregister_mcis:
+	igen6_unregister_mcis();
+
+	return rc;
 }
 
 static int igen6_mem_slice_setup(u64 mchbar)
···
 static int igen6_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 {
 	u64 mchbar;
-	int i, rc;
+	int rc;
 
 	edac_dbg(2, "\n");
 
···
 
 	opstate_set(res_cfg, ent);
 
-	for (i = 0; i < res_cfg->num_imc; i++) {
-		rc = igen6_register_mci(i, mchbar, pdev);
-		if (rc)
-			goto fail2;
-	}
+	rc = igen6_register_mcis(pdev, mchbar);
+	if (rc)
+		goto fail;
 
 	if (res_cfg->num_imc > 1) {
 		rc = igen6_mem_slice_setup(mchbar);

drivers/edac/skx_common.c

···
 
 void skx_adxl_put(void)
 {
+	adxl_component_count = 0;
 	kfree(adxl_values);
 	kfree(adxl_msg);
 }

drivers/edac/skx_common.h

···
  */
 #define MCACOD_EXT_MEM_ERR	0x280
 
+/* Max RRL register sets per {,sub-,pseudo-}channel. */
+#define NUM_RRL_SET		4
+/* Max RRL registers per set. */
+#define NUM_RRL_REG		6
+/* Max correctable error count registers. */
+#define NUM_CECNT_REG		8
+
+/* Modes of RRL register set. */
+enum rrl_mode {
+	/* Last read error from patrol scrub. */
+	LRE_SCRUB,
+	/* Last read error from demand. */
+	LRE_DEMAND,
+	/* First read error from patrol scrub. */
+	FRE_SCRUB,
+	/* First read error from demand. */
+	FRE_DEMAND,
+};
+
+/* RRL registers per {,sub-,pseudo-}channel. */
+struct reg_rrl {
+	/* RRL register parts. */
+	int set_num, reg_num;
+	enum rrl_mode modes[NUM_RRL_SET];
+	u32 offsets[NUM_RRL_SET][NUM_RRL_REG];
+	/* RRL register widths in byte per set. */
+	u8 widths[NUM_RRL_REG];
+	/* RRL control bits of the first register per set. */
+	u32 v_mask;
+	u32 uc_mask;
+	u32 over_mask;
+	u32 en_patspr_mask;
+	u32 noover_mask;
+	u32 en_mask;
+
+	/* CORRERRCNT register parts. */
+	int cecnt_num;
+	u32 cecnt_offsets[NUM_CECNT_REG];
+	u8 cecnt_widths[NUM_CECNT_REG];
+};
+
 /*
  * Each cpu socket contains some pci devices that provide global
  * information, and also some that are local to each of the two
···
 		struct skx_channel {
 			struct pci_dev	*cdev;
 			struct pci_dev	*edev;
-			u32 retry_rd_err_log_s;
-			u32 retry_rd_err_log_d;
-			u32 retry_rd_err_log_d2;
+			/*
+			 * Two groups of RRL control registers per channel to save default RRL
+			 * settings of two {sub-,pseudo-}channels in Linux RRL control mode.
+			 */
+			u32 rrl_ctl[2][NUM_RRL_SET];
 			struct skx_dimm {
 				u8 close_pg;
 				u8 bank_xor_enable;
···
 	/* HBM mdev device BDF */
 	struct pci_bdf hbm_mdev_bdf;
 	int sad_all_offset;
-	/* Offsets of retry_rd_err_log registers */
-	u32 *offsets_scrub;
-	u32 *offsets_scrub_hbm0;
-	u32 *offsets_scrub_hbm1;
-	u32 *offsets_demand;
-	u32 *offsets_demand2;
-	u32 *offsets_demand_hbm0;
-	u32 *offsets_demand_hbm1;
+	/* RRL register sets per DDR channel */
+	struct reg_rrl *reg_rrl_ddr;
+	/* RRL register sets per HBM channel */
+	struct reg_rrl *reg_rrl_hbm[2];
 };
 
 typedef int (*get_dimm_config_f)(struct mem_ctl_info *mci,