HV: load cpu px data in boot

The patch takes Intel ATOM A3960 as example that hard code all Px info
which is needed for Px control into Acrn HV and load it in boot process.

Signed-off-by: Victor Sun <victor.sun@intel.com>
Acked-by: Kevin Tian <kevin.tian@intel.com>

Makefile

@@ -104,6 +104,7 @@ C_SRCS += arch/x86/vmexit.c
 C_SRCS += arch/x86/vmx.c
 C_SRCS += arch/x86/assign.c
 C_SRCS += arch/x86/trusty.c
+C_SRCS += arch/x86/cpu_state_tbl.c
 C_SRCS += arch/x86/guest/vcpu.c
 C_SRCS += arch/x86/guest/vm.c
 C_SRCS += arch/x86/guest/instr_emul_wrapper.c

arch/x86/cpu.c

@@ -36,6 +36,7 @@
 #include <schedule.h>
 #include <version.h>
 #include <hv_debug.h>
+#include <cpu_state_tbl.h>
 
 #ifdef CONFIG_EFI_STUB
 extern uint32_t efi_physical_available_ap_bitmap;
@@ -398,6 +399,8 @@ void bsp_boot_init(void)
 
 	get_cpu_name();
 
+	load_cpu_state_data();
+
 	/* Initialize the hypervisor paging */
 	init_paging();
 

arch/x86/cpu_state_tbl.c

@@ -0,0 +1,107 @@
+/*
+ * Copyright (C) 2018 Intel Corporation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *   * Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *   * Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in
+ *     the documentation and/or other materials provided with the
+ *     distribution.
+ *   * Neither the name of Intel Corporation nor the names of its
+ *     contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <hv_lib.h>
+#include <cpu.h>
+#include <acrn_common.h>
+#include <cpu_state_tbl.h>
+
+/* The table includes cpu px info of Intel A3960 SoC */
+struct cpu_px_data px_a3960[] = {
+	{0x960, 0, 0xA, 0xA, 0x1800, 0x1800}, /* P0 */
+	{0x8FC, 0, 0xA, 0xA, 0x1700, 0x1700}, /* P1 */
+	{0x898, 0, 0xA, 0xA, 0x1600, 0x1600}, /* P2 */
+	{0x834, 0, 0xA, 0xA, 0x1500, 0x1500}, /* P3 */
+	{0x7D0, 0, 0xA, 0xA, 0x1400, 0x1400}, /* P4 */
+	{0x76C, 0, 0xA, 0xA, 0x1300, 0x1300}, /* P5 */
+	{0x708, 0, 0xA, 0xA, 0x1200, 0x1200}, /* P6 */
+	{0x6A4, 0, 0xA, 0xA, 0x1100, 0x1100}, /* P7 */
+	{0x640, 0, 0xA, 0xA, 0x1000, 0x1000}, /* P8 */
+	{0x5DC, 0, 0xA, 0xA, 0x0F00, 0x0F00}, /* P9 */
+	{0x578, 0, 0xA, 0xA, 0x0E00, 0x0E00}, /* P10 */
+	{0x514, 0, 0xA, 0xA, 0x0D00, 0x0D00}, /* P11 */
+	{0x4B0, 0, 0xA, 0xA, 0x0C00, 0x0C00}, /* P12 */
+	{0x44C, 0, 0xA, 0xA, 0x0B00, 0x0B00}, /* P13 */
+	{0x3E8, 0, 0xA, 0xA, 0x0A00, 0x0A00}, /* P14 */
+	{0x384, 0, 0xA, 0xA, 0x0900, 0x0900}, /* P15 */
+	{0x320, 0, 0xA, 0xA, 0x0800, 0x0800}  /* P16 */
+};
+
+struct cpu_state_table cpu_state_tbl[] = {
+	{"Intel(R) Atom(TM) Processor A3960 @ 1.90GHz", 17, px_a3960}
+};
+
+static int get_state_tbl_idx(char *cpuname)
+{
+	int i;
+	int count = ARRAY_SIZE(cpu_state_tbl);
+
+	if (!cpuname) {
+		return -1;
+	}
+
+	for (i = 0; i < count; i++) {
+		if (!strcmp((cpu_state_tbl[i].model_name),
+				cpuname)) {
+			return i;
+		}
+	}
+
+	return -1;
+}
+
+void load_cpu_state_data(void)
+{
+	int tbl_idx;
+
+	boot_cpu_data.px_cnt = 0;
+	boot_cpu_data.px_data = NULL;
+
+	tbl_idx = get_state_tbl_idx(boot_cpu_data.model_name);
+	if (tbl_idx < 0) {
+		/* The state table is not found. */
+		return;
+	}
+
+	if (!((cpu_state_tbl + tbl_idx)->px_cnt)
+		|| !((cpu_state_tbl + tbl_idx)->px_data)) {
+		/* The state table must be wrong. */
+		return;
+	}
+
+	if ((cpu_state_tbl + tbl_idx)->px_cnt > MAX_PSTATE) {
+		boot_cpu_data.px_cnt = MAX_PSTATE;
+	} else {
+		boot_cpu_data.px_cnt = (cpu_state_tbl + tbl_idx)->px_cnt;
+	}
+
+	boot_cpu_data.px_data = (cpu_state_tbl + tbl_idx)->px_data;
+
+}

include/arch/x86/cpu.h

@@ -237,10 +237,14 @@ struct cpuinfo_x86 {
 	uint64_t physical_address_mask;
 	uint32_t cpuid_leaves[FEATURE_WORDS];
 	char model_name[64];
+	uint8_t			px_cnt;
+	struct cpu_px_data	*px_data;
 };
 
 extern struct cpuinfo_x86 boot_cpu_data;
 
+#define MAX_PSTATE	20
+
 /* Function prototypes */
 void cpu_halt(uint32_t logical_id);
 uint64_t cpu_cycles_per_second(void);

include/arch/x86/cpu_state_tbl.h

@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2018 Intel Corporation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *   * Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *   * Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in
+ *     the documentation and/or other materials provided with the
+ *     distribution.
+ *   * Neither the name of Intel Corporation nor the names of its
+ *     contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef CPU_STATE_TBL_H
+#define CPU_STATE_TBL_H
+
+struct cpu_state_table {
+	char			model_name[64];
+	uint8_t			px_cnt;
+	struct cpu_px_data	*px_data;
+};
+
+void load_cpu_state_data(void);
+
+#endif /* CPU_STATE_TBL_H */

include/public/acrn_common.h

@@ -288,6 +288,19 @@ struct acrn_vm_pci_msix_remap {
  */
 #define GUEST_CFG_OFFSET	0xd0000
 
+/**
+ * @brief Info The power state data of a VCPU.
+ *
+ */
+struct cpu_px_data {
+	uint64_t core_frequency;	/* megahertz */
+	uint64_t power;			/* milliWatts */
+	uint64_t transition_latency;	/* microseconds */
+	uint64_t bus_master_latency;	/* microseconds */
+	uint64_t control;		/* control value */
+	uint64_t status;		/* success indicator */
+} __attribute__((aligned(8)));
+
 /**
  * @}
  */