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-rw-r--r--arch/x86/Kbuild3
-rw-r--r--arch/x86/Kconfig7
-rw-r--r--arch/x86/Kconfig.debug11
-rw-r--r--arch/x86/hyperv/Makefile1
-rw-r--r--arch/x86/hyperv/hv_init.c277
-rw-r--r--arch/x86/include/asm/mshyperv.h151
-rw-r--r--arch/x86/include/asm/xen/hypercall.h7
-rw-r--r--arch/x86/include/uapi/asm/hyperv.h8
-rw-r--r--arch/x86/kernel/acpi/boot.c5
-rw-r--r--arch/x86/kernel/acpi/cstate.c9
-rw-r--r--arch/x86/kernel/cpu/mshyperv.c50
-rw-r--r--arch/x86/net/bpf_jit_comp.c25
-rw-r--r--arch/x86/platform/goldfish/goldfish.c14
-rw-r--r--arch/x86/xen/Kconfig2
-rw-r--r--arch/x86/xen/Makefile1
-rw-r--r--arch/x86/xen/apic.c2
-rw-r--r--arch/x86/xen/enlighten.c279
-rw-r--r--arch/x86/xen/mmu.c21
-rw-r--r--arch/x86/xen/platform-pci-unplug.c4
-rw-r--r--arch/x86/xen/setup.c37
-rw-r--r--arch/x86/xen/smp.c78
-rw-r--r--arch/x86/xen/smp.h8
-rw-r--r--arch/x86/xen/xen-head.S62
-rw-r--r--arch/x86/xen/xen-ops.h1
-rw-r--r--arch/x86/xen/xen-pvh.S161
25 files changed, 850 insertions, 374 deletions
diff --git a/arch/x86/Kbuild b/arch/x86/Kbuild
index eb3abf8ac44e..586b786b3edf 100644
--- a/arch/x86/Kbuild
+++ b/arch/x86/Kbuild
@@ -7,6 +7,9 @@ obj-$(CONFIG_KVM) += kvm/
# Xen paravirtualization support
obj-$(CONFIG_XEN) += xen/
+# Hyper-V paravirtualization support
+obj-$(CONFIG_HYPERVISOR_GUEST) += hyperv/
+
# lguest paravirtualization support
obj-$(CONFIG_LGUEST_GUEST) += lguest/
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index f8fbfc5a98ba..874c1238dffd 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -46,6 +46,7 @@ config X86
select ARCH_CLOCKSOURCE_DATA
select ARCH_DISCARD_MEMBLOCK
select ARCH_HAS_ACPI_TABLE_UPGRADE if ACPI
+ select ARCH_HAS_DEBUG_VIRTUAL
select ARCH_HAS_DEVMEM_IS_ALLOWED
select ARCH_HAS_ELF_RANDOMIZE
select ARCH_HAS_FAST_MULTIPLIER
@@ -53,7 +54,10 @@ config X86
select ARCH_HAS_KCOV if X86_64
select ARCH_HAS_MMIO_FLUSH
select ARCH_HAS_PMEM_API if X86_64
+ select ARCH_HAS_SET_MEMORY
select ARCH_HAS_SG_CHAIN
+ select ARCH_HAS_STRICT_KERNEL_RWX
+ select ARCH_HAS_STRICT_MODULE_RWX
select ARCH_HAS_UBSAN_SANITIZE_ALL
select ARCH_HAVE_NMI_SAFE_CMPXCHG
select ARCH_MIGHT_HAVE_ACPI_PDC if ACPI
@@ -309,9 +313,6 @@ config ARCH_SUPPORTS_UPROBES
config FIX_EARLYCON_MEM
def_bool y
-config DEBUG_RODATA
- def_bool y
-
config PGTABLE_LEVELS
int
default 4 if X86_64
diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug
index 783099f2ac72..c4cba00dbdee 100644
--- a/arch/x86/Kconfig.debug
+++ b/arch/x86/Kconfig.debug
@@ -109,17 +109,6 @@ config DEBUG_WX
If in doubt, say "Y".
-config DEBUG_SET_MODULE_RONX
- bool "Set loadable kernel module data as NX and text as RO"
- depends on MODULES
- ---help---
- This option helps catch unintended modifications to loadable
- kernel module's text and read-only data. It also prevents execution
- of module data. Such protection may interfere with run-time code
- patching and dynamic kernel tracing - and they might also protect
- against certain classes of kernel exploits.
- If in doubt, say "N".
-
config DOUBLEFAULT
default y
bool "Enable doublefault exception handler" if EXPERT
diff --git a/arch/x86/hyperv/Makefile b/arch/x86/hyperv/Makefile
new file mode 100644
index 000000000000..171ae09864d7
--- /dev/null
+++ b/arch/x86/hyperv/Makefile
@@ -0,0 +1 @@
+obj-y := hv_init.o
diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c
new file mode 100644
index 000000000000..db64baf0e500
--- /dev/null
+++ b/arch/x86/hyperv/hv_init.c
@@ -0,0 +1,277 @@
+/*
+ * X86 specific Hyper-V initialization code.
+ *
+ * Copyright (C) 2016, Microsoft, Inc.
+ *
+ * Author : K. Y. Srinivasan <kys@microsoft.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ * NON INFRINGEMENT. See the GNU General Public License for more
+ * details.
+ *
+ */
+
+#include <linux/types.h>
+#include <asm/hypervisor.h>
+#include <asm/hyperv.h>
+#include <asm/mshyperv.h>
+#include <linux/version.h>
+#include <linux/vmalloc.h>
+#include <linux/mm.h>
+#include <linux/clockchips.h>
+
+
+#ifdef CONFIG_X86_64
+
+static struct ms_hyperv_tsc_page *tsc_pg;
+
+static u64 read_hv_clock_tsc(struct clocksource *arg)
+{
+ u64 current_tick;
+
+ if (tsc_pg->tsc_sequence != 0) {
+ /*
+ * Use the tsc page to compute the value.
+ */
+
+ while (1) {
+ u64 tmp;
+ u32 sequence = tsc_pg->tsc_sequence;
+ u64 cur_tsc;
+ u64 scale = tsc_pg->tsc_scale;
+ s64 offset = tsc_pg->tsc_offset;
+
+ rdtscll(cur_tsc);
+ /* current_tick = ((cur_tsc *scale) >> 64) + offset */
+ asm("mulq %3"
+ : "=d" (current_tick), "=a" (tmp)
+ : "a" (cur_tsc), "r" (scale));
+
+ current_tick += offset;
+ if (tsc_pg->tsc_sequence == sequence)
+ return current_tick;
+
+ if (tsc_pg->tsc_sequence != 0)
+ continue;
+ /*
+ * Fallback using MSR method.
+ */
+ break;
+ }
+ }
+ rdmsrl(HV_X64_MSR_TIME_REF_COUNT, current_tick);
+ return current_tick;
+}
+
+static struct clocksource hyperv_cs_tsc = {
+ .name = "hyperv_clocksource_tsc_page",
+ .rating = 400,
+ .read = read_hv_clock_tsc,
+ .mask = CLOCKSOURCE_MASK(64),
+ .flags = CLOCK_SOURCE_IS_CONTINUOUS,
+};
+#endif
+
+static u64 read_hv_clock_msr(struct clocksource *arg)
+{
+ u64 current_tick;
+ /*
+ * Read the partition counter to get the current tick count. This count
+ * is set to 0 when the partition is created and is incremented in
+ * 100 nanosecond units.
+ */
+ rdmsrl(HV_X64_MSR_TIME_REF_COUNT, current_tick);
+ return current_tick;
+}
+
+static struct clocksource hyperv_cs_msr = {
+ .name = "hyperv_clocksource_msr",
+ .rating = 400,
+ .read = read_hv_clock_msr,
+ .mask = CLOCKSOURCE_MASK(64),
+ .flags = CLOCK_SOURCE_IS_CONTINUOUS,
+};
+
+static void *hypercall_pg;
+struct clocksource *hyperv_cs;
+EXPORT_SYMBOL_GPL(hyperv_cs);
+
+/*
+ * This function is to be invoked early in the boot sequence after the
+ * hypervisor has been detected.
+ *
+ * 1. Setup the hypercall page.
+ * 2. Register Hyper-V specific clocksource.
+ */
+void hyperv_init(void)
+{
+ u64 guest_id;
+ union hv_x64_msr_hypercall_contents hypercall_msr;
+
+ if (x86_hyper != &x86_hyper_ms_hyperv)
+ return;
+
+ /*
+ * Setup the hypercall page and enable hypercalls.
+ * 1. Register the guest ID
+ * 2. Enable the hypercall and register the hypercall page
+ */
+ guest_id = generate_guest_id(0, LINUX_VERSION_CODE, 0);
+ wrmsrl(HV_X64_MSR_GUEST_OS_ID, guest_id);
+
+ hypercall_pg = __vmalloc(PAGE_SIZE, GFP_KERNEL, PAGE_KERNEL_RX);
+ if (hypercall_pg == NULL) {
+ wrmsrl(HV_X64_MSR_GUEST_OS_ID, 0);
+ return;
+ }
+
+ rdmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64);
+ hypercall_msr.enable = 1;
+ hypercall_msr.guest_physical_address = vmalloc_to_pfn(hypercall_pg);
+ wrmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64);
+
+ /*
+ * Register Hyper-V specific clocksource.
+ */
+#ifdef CONFIG_X86_64
+ if (ms_hyperv.features & HV_X64_MSR_REFERENCE_TSC_AVAILABLE) {
+ union hv_x64_msr_hypercall_contents tsc_msr;
+
+ tsc_pg = __vmalloc(PAGE_SIZE, GFP_KERNEL, PAGE_KERNEL);
+ if (!tsc_pg)
+ goto register_msr_cs;
+
+ hyperv_cs = &hyperv_cs_tsc;
+
+ rdmsrl(HV_X64_MSR_REFERENCE_TSC, tsc_msr.as_uint64);
+
+ tsc_msr.enable = 1;
+ tsc_msr.guest_physical_address = vmalloc_to_pfn(tsc_pg);
+
+ wrmsrl(HV_X64_MSR_REFERENCE_TSC, tsc_msr.as_uint64);
+ clocksource_register_hz(&hyperv_cs_tsc, NSEC_PER_SEC/100);
+ return;
+ }
+#endif
+ /*
+ * For 32 bit guests just use the MSR based mechanism for reading
+ * the partition counter.
+ */
+
+register_msr_cs:
+ hyperv_cs = &hyperv_cs_msr;
+ if (ms_hyperv.features & HV_X64_MSR_TIME_REF_COUNT_AVAILABLE)
+ clocksource_register_hz(&hyperv_cs_msr, NSEC_PER_SEC/100);
+}
+
+/*
+ * This routine is called before kexec/kdump, it does the required cleanup.
+ */
+void hyperv_cleanup(void)
+{
+ union hv_x64_msr_hypercall_contents hypercall_msr;
+
+ /* Reset our OS id */
+ wrmsrl(HV_X64_MSR_GUEST_OS_ID, 0);
+
+ /* Reset the hypercall page */
+ hypercall_msr.as_uint64 = 0;
+ wrmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64);
+
+ /* Reset the TSC page */
+ hypercall_msr.as_uint64 = 0;
+ wrmsrl(HV_X64_MSR_REFERENCE_TSC, hypercall_msr.as_uint64);
+}
+EXPORT_SYMBOL_GPL(hyperv_cleanup);
+
+/*
+ * hv_do_hypercall- Invoke the specified hypercall
+ */
+u64 hv_do_hypercall(u64 control, void *input, void *output)
+{
+ u64 input_address = (input) ? virt_to_phys(input) : 0;
+ u64 output_address = (output) ? virt_to_phys(output) : 0;
+#ifdef CONFIG_X86_64
+ u64 hv_status = 0;
+
+ if (!hypercall_pg)
+ return (u64)ULLONG_MAX;
+
+ __asm__ __volatile__("mov %0, %%r8" : : "r" (output_address) : "r8");
+ __asm__ __volatile__("call *%3" : "=a" (hv_status) :
+ "c" (control), "d" (input_address),
+ "m" (hypercall_pg));
+
+ return hv_status;
+
+#else
+
+ u32 control_hi = control >> 32;
+ u32 control_lo = control & 0xFFFFFFFF;
+ u32 hv_status_hi = 1;
+ u32 hv_status_lo = 1;
+ u32 input_address_hi = input_address >> 32;
+ u32 input_address_lo = input_address & 0xFFFFFFFF;
+ u32 output_address_hi = output_address >> 32;
+ u32 output_address_lo = output_address & 0xFFFFFFFF;
+
+ if (!hypercall_pg)
+ return (u64)ULLONG_MAX;
+
+ __asm__ __volatile__ ("call *%8" : "=d"(hv_status_hi),
+ "=a"(hv_status_lo) : "d" (control_hi),
+ "a" (control_lo), "b" (input_address_hi),
+ "c" (input_address_lo), "D"(output_address_hi),
+ "S"(output_address_lo), "m" (hypercall_pg));
+
+ return hv_status_lo | ((u64)hv_status_hi << 32);
+#endif /* !x86_64 */
+}
+EXPORT_SYMBOL_GPL(hv_do_hypercall);
+
+void hyperv_report_panic(struct pt_regs *regs)
+{
+ static bool panic_reported;
+
+ /*
+ * We prefer to report panic on 'die' chain as we have proper
+ * registers to report, but if we miss it (e.g. on BUG()) we need
+ * to report it on 'panic'.
+ */
+ if (panic_reported)
+ return;
+ panic_reported = true;
+
+ wrmsrl(HV_X64_MSR_CRASH_P0, regs->ip);
+ wrmsrl(HV_X64_MSR_CRASH_P1, regs->ax);
+ wrmsrl(HV_X64_MSR_CRASH_P2, regs->bx);
+ wrmsrl(HV_X64_MSR_CRASH_P3, regs->cx);
+ wrmsrl(HV_X64_MSR_CRASH_P4, regs->dx);
+
+ /*
+ * Let Hyper-V know there is crash data available
+ */
+ wrmsrl(HV_X64_MSR_CRASH_CTL, HV_CRASH_CTL_CRASH_NOTIFY);
+}
+EXPORT_SYMBOL_GPL(hyperv_report_panic);
+
+bool hv_is_hypercall_page_setup(void)
+{
+ union hv_x64_msr_hypercall_contents hypercall_msr;
+
+ /* Check if the hypercall page is setup */
+ hypercall_msr.as_uint64 = 0;
+ rdmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64);
+
+ if (!hypercall_msr.enable)
+ return false;
+
+ return true;
+}
+EXPORT_SYMBOL_GPL(hv_is_hypercall_page_setup);
diff --git a/arch/x86/include/asm/mshyperv.h b/arch/x86/include/asm/mshyperv.h
index aaf59b7da98a..7c9c895432a9 100644
--- a/arch/x86/include/asm/mshyperv.h
+++ b/arch/x86/include/asm/mshyperv.h
@@ -3,8 +3,28 @@
#include <linux/types.h>
#include <linux/interrupt.h>
+#include <linux/clocksource.h>
#include <asm/hyperv.h>
+/*
+ * The below CPUID leaves are present if VersionAndFeatures.HypervisorPresent
+ * is set by CPUID(HVCPUID_VERSION_FEATURES).
+ */
+enum hv_cpuid_function {
+ HVCPUID_VERSION_FEATURES = 0x00000001,
+ HVCPUID_VENDOR_MAXFUNCTION = 0x40000000,
+ HVCPUID_INTERFACE = 0x40000001,
+
+ /*
+ * The remaining functions depend on the value of
+ * HVCPUID_INTERFACE
+ */
+ HVCPUID_VERSION = 0x40000002,
+ HVCPUID_FEATURES = 0x40000003,
+ HVCPUID_ENLIGHTENMENT_INFO = 0x40000004,
+ HVCPUID_IMPLEMENTATION_LIMITS = 0x40000005,
+};
+
struct ms_hyperv_info {
u32 features;
u32 misc_features;
@@ -13,6 +33,128 @@ struct ms_hyperv_info {
extern struct ms_hyperv_info ms_hyperv;
+/*
+ * Declare the MSR used to setup pages used to communicate with the hypervisor.
+ */
+union hv_x64_msr_hypercall_contents {
+ u64 as_uint64;
+ struct {
+ u64 enable:1;
+ u64 reserved:11;
+ u64 guest_physical_address:52;
+ };
+};
+
+/*
+ * TSC page layout.
+ */
+
+struct ms_hyperv_tsc_page {
+ volatile u32 tsc_sequence;
+ u32 reserved1;
+ volatile u64 tsc_scale;
+ volatile s64 tsc_offset;
+ u64 reserved2[509];
+};
+
+/*
+ * The guest OS needs to register the guest ID with the hypervisor.
+ * The guest ID is a 64 bit entity and the structure of this ID is
+ * specified in the Hyper-V specification:
+ *
+ * msdn.microsoft.com/en-us/library/windows/hardware/ff542653%28v=vs.85%29.aspx
+ *
+ * While the current guideline does not specify how Linux guest ID(s)
+ * need to be generated, our plan is to publish the guidelines for
+ * Linux and other guest operating systems that currently are hosted
+ * on Hyper-V. The implementation here conforms to this yet
+ * unpublished guidelines.
+ *
+ *
+ * Bit(s)
+ * 63 - Indicates if the OS is Open Source or not; 1 is Open Source
+ * 62:56 - Os Type; Linux is 0x100
+ * 55:48 - Distro specific identification
+ * 47:16 - Linux kernel version number
+ * 15:0 - Distro specific identification
+ *
+ *
+ */
+
+#define HV_LINUX_VENDOR_ID 0x8100
+
+/*
+ * Generate the guest ID based on the guideline described above.
+ */
+
+static inline __u64 generate_guest_id(__u64 d_info1, __u64 kernel_version,
+ __u64 d_info2)
+{
+ __u64 guest_id = 0;
+
+ guest_id = (((__u64)HV_LINUX_VENDOR_ID) << 48);
+ guest_id |= (d_info1 << 48);
+ guest_id |= (kernel_version << 16);
+ guest_id |= d_info2;
+
+ return guest_id;
+}
+
+
+/* Free the message slot and signal end-of-message if required */
+static inline void vmbus_signal_eom(struct hv_message *msg, u32 old_msg_type)
+{
+ /*
+ * On crash we're reading some other CPU's message page and we need
+ * to be careful: this other CPU may already had cleared the header
+ * and the host may already had delivered some other message there.
+ * In case we blindly write msg->header.message_type we're going
+ * to lose it. We can still lose a message of the same type but
+ * we count on the fact that there can only be one
+ * CHANNELMSG_UNLOAD_RESPONSE and we don't care about other messages
+ * on crash.
+ */
+ if (cmpxchg(&msg->header.message_type, old_msg_type,
+ HVMSG_NONE) != old_msg_type)
+ return;
+
+ /*
+ * Make sure the write to MessageType (ie set to
+ * HVMSG_NONE) happens before we read the
+ * MessagePending and EOMing. Otherwise, the EOMing
+ * will not deliver any more messages since there is
+ * no empty slot
+ */
+ mb();
+
+ if (msg->header.message_flags.msg_pending) {
+ /*
+ * This will cause message queue rescan to
+ * possibly deliver another msg from the
+ * hypervisor
+ */
+ wrmsrl(HV_X64_MSR_EOM, 0);
+ }
+}
+
+#define hv_get_current_tick(tick) rdmsrl(HV_X64_MSR_TIME_REF_COUNT, tick)
+#define hv_init_timer(timer, tick) wrmsrl(timer, tick)
+#define hv_init_timer_config(config, val) wrmsrl(config, val)
+
+#define hv_get_simp(val) rdmsrl(HV_X64_MSR_SIMP, val)
+#define hv_set_simp(val) wrmsrl(HV_X64_MSR_SIMP, val)
+
+#define hv_get_siefp(val) rdmsrl(HV_X64_MSR_SIEFP, val)
+#define hv_set_siefp(val) wrmsrl(HV_X64_MSR_SIEFP, val)
+
+#define hv_get_synic_state(val) rdmsrl(HV_X64_MSR_SCONTROL, val)
+#define hv_set_synic_state(val) wrmsrl(HV_X64_MSR_SCONTROL, val)
+
+#define hv_get_vp_index(index) rdmsrl(HV_X64_MSR_VP_INDEX, index)
+
+#define hv_get_synint_state(int_num, val) rdmsrl(int_num, val)
+#define hv_set_synint_state(int_num, val) wrmsrl(int_num, val)
+
void hyperv_callback_vector(void);
#ifdef CONFIG_TRACING
#define trace_hyperv_callback_vector hyperv_callback_vector
@@ -25,4 +167,13 @@ void hv_setup_kexec_handler(void (*handler)(void));
void hv_remove_kexec_handler(void);
void hv_setup_crash_handler(void (*handler)(struct pt_regs *regs));
void hv_remove_crash_handler(void);
+
+#if IS_ENABLED(CONFIG_HYPERV)
+extern struct clocksource *hyperv_cs;
+
+void hyperv_init(void);
+void hyperv_report_panic(struct pt_regs *regs);
+bool hv_is_hypercall_page_setup(void);
+void hyperv_cleanup(void);
+#endif
#endif
diff --git a/arch/x86/include/asm/xen/hypercall.h b/arch/x86/include/asm/xen/hypercall.h
index a12a047184ee..f6d20f6cca12 100644
--- a/arch/x86/include/asm/xen/hypercall.h
+++ b/arch/x86/include/asm/xen/hypercall.h
@@ -472,6 +472,13 @@ HYPERVISOR_xenpmu_op(unsigned int op, void *arg)
return _hypercall2(int, xenpmu_op, op, arg);
}
+static inline int
+HYPERVISOR_dm_op(
+ domid_t dom, unsigned int nr_bufs, void *bufs)
+{
+ return _hypercall3(int, dm_op, dom, nr_bufs, bufs);
+}
+
static inline void
MULTI_fpu_taskswitch(struct multicall_entry *mcl, int set)
{
diff --git a/arch/x86/include/uapi/asm/hyperv.h b/arch/x86/include/uapi/asm/hyperv.h
index 9b1a91834ac8..3a20ccf787b8 100644
--- a/arch/x86/include/uapi/asm/hyperv.h
+++ b/arch/x86/include/uapi/asm/hyperv.h
@@ -73,6 +73,9 @@
*/
#define HV_X64_MSR_STAT_PAGES_AVAILABLE (1 << 8)
+/* Crash MSR available */
+#define HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE (1 << 10)
+
/*
* Feature identification: EBX indicates which flags were specified at
* partition creation. The format is the same as the partition creation
@@ -144,6 +147,11 @@
*/
#define HV_X64_RELAXED_TIMING_RECOMMENDED (1 << 5)
+/*
+ * Crash notification flag.
+ */
+#define HV_CRASH_CTL_CRASH_NOTIFY (1ULL << 63)
+
/* MSR used to identify the guest OS. */
#define HV_X64_MSR_GUEST_OS_ID 0x40000000
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index 7ff007ed899d..ae32838cac5f 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -724,11 +724,12 @@ int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
return 0;
}
-int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, int *pcpu)
+int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id,
+ int *pcpu)
{
int cpu;
- cpu = acpi_register_lapic(physid, U32_MAX, ACPI_MADT_ENABLED);
+ cpu = acpi_register_lapic(physid, acpi_id, ACPI_MADT_ENABLED);
if (cpu < 0) {
pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
return cpu;
diff --git a/arch/x86/kernel/acpi/cstate.c b/arch/x86/kernel/acpi/cstate.c
index af15f4444330..8233a630280f 100644
--- a/arch/x86/kernel/acpi/cstate.c
+++ b/arch/x86/kernel/acpi/cstate.c
@@ -12,7 +12,6 @@
#include <linux/sched.h>
#include <acpi/processor.h>
-#include <asm/acpi.h>
#include <asm/mwait.h>
#include <asm/special_insns.h>
@@ -89,7 +88,8 @@ static long acpi_processor_ffh_cstate_probe_cpu(void *_cx)
retval = 0;
/* If the HW does not support any sub-states in this C-state */
if (num_cstate_subtype == 0) {
- pr_warn(FW_BUG "ACPI MWAIT C-state 0x%x not supported by HW (0x%x)\n", cx->address, edx_part);
+ pr_warn(FW_BUG "ACPI MWAIT C-state 0x%x not supported by HW (0x%x)\n",
+ cx->address, edx_part);
retval = -1;
goto out;
}
@@ -104,8 +104,8 @@ static long acpi_processor_ffh_cstate_probe_cpu(void *_cx)
if (!mwait_supported[cstate_type]) {
mwait_supported[cstate_type] = 1;
printk(KERN_DEBUG
- "Monitor-Mwait will be used to enter C-%d "
- "state\n", cx->type);
+ "Monitor-Mwait will be used to enter C-%d state\n",
+ cx->type);
}
snprintf(cx->desc,
ACPI_CX_DESC_LEN, "ACPI FFH INTEL MWAIT 0x%x",
@@ -166,6 +166,7 @@ EXPORT_SYMBOL_GPL(acpi_processor_ffh_cstate_enter);
static int __init ffh_cstate_init(void)
{
struct cpuinfo_x86 *c = &boot_cpu_data;
+
if (c->x86_vendor != X86_VENDOR_INTEL)
return -1;
diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c
index 65e20c97e04b..b5375b9497b3 100644
--- a/arch/x86/kernel/cpu/mshyperv.c
+++ b/arch/x86/kernel/cpu/mshyperv.c
@@ -133,26 +133,6 @@ static uint32_t __init ms_hyperv_platform(void)
return 0;
}
-static u64 read_hv_clock(struct clocksource *arg)
-{
- u64 current_tick;
- /*
- * Read the partition counter to get the current tick count. This count
- * is set to 0 when the partition is created and is incremented in
- * 100 nanosecond units.
- */
- rdmsrl(HV_X64_MSR_TIME_REF_COUNT, current_tick);
- return current_tick;
-}
-
-static struct clocksource hyperv_cs = {
- .name = "hyperv_clocksource",
- .rating = 400, /* use this when running on Hyperv*/
- .read = read_hv_clock,
- .mask = CLOCKSOURCE_MASK(64),
- .flags = CLOCK_SOURCE_IS_CONTINUOUS,
-};
-
static unsigned char hv_get_nmi_reason(void)
{
return 0;
@@ -180,6 +160,11 @@ static int hv_nmi_unknown(unsigned int val, struct pt_regs *regs)
static void __init ms_hyperv_init_platform(void)
{
+ int hv_host_info_eax;
+ int hv_host_info_ebx;
+ int hv_host_info_ecx;
+ int hv_host_info_edx;
+
/*
* Extract the features and hints
*/
@@ -190,6 +175,21 @@ static void __init ms_hyperv_init_platform(void)
pr_info("HyperV: features 0x%x, hints 0x%x\n",
ms_hyperv.features, ms_hyperv.hints);
+ /*
+ * Extract host information.
+ */
+ if (cpuid_eax(HVCPUID_VENDOR_MAXFUNCTION) >= HVCPUID_VERSION) {
+ hv_host_info_eax = cpuid_eax(HVCPUID_VERSION);
+ hv_host_info_ebx = cpuid_ebx(HVCPUID_VERSION);
+ hv_host_info_ecx = cpuid_ecx(HVCPUID_VERSION);
+ hv_host_info_edx = cpuid_edx(HVCPUID_VERSION);
+
+ pr_info("Hyper-V Host Build:%d-%d.%d-%d-%d.%d\n",
+ hv_host_info_eax, hv_host_info_ebx >> 16,
+ hv_host_info_ebx & 0xFFFF, hv_host_info_ecx,
+ hv_host_info_edx >> 24, hv_host_info_edx & 0xFFFFFF);
+ }
+
#ifdef CONFIG_X86_LOCAL_APIC
if (ms_hyperv.features & HV_X64_MSR_APIC_FREQUENCY_AVAILABLE) {
/*
@@ -208,9 +208,6 @@ static void __init ms_hyperv_init_platform(void)
"hv_nmi_unknown");
#endif
- if (ms_hyperv.features & HV_X64_MSR_TIME_REF_COUNT_AVAILABLE)
- clocksource_register_hz(&hyperv_cs, NSEC_PER_SEC/100);
-
#ifdef CONFIG_X86_IO_APIC
no_timer_check = 1;
#endif
@@ -227,6 +224,13 @@ static void __init ms_hyperv_init_platform(void)
*/
if (efi_enabled(EFI_BOOT))
x86_platform.get_nmi_reason = hv_get_nmi_reason;
+
+#if IS_ENABLED(CONFIG_HYPERV)
+ /*
+ * Setup the hook to get control post apic initialization.
+ */
+ x86_platform.apic_post_init = hyperv_init;
+#endif
}
const __refconst struct hypervisor_x86 x86_hyper_ms_hyperv = {
diff --git a/arch/x86/net/bpf_jit_comp.c b/arch/x86/net/bpf_jit_comp.c
index bb660e53cbd6..32322ce9b405 100644
--- a/arch/x86/net/bpf_jit_comp.c
+++ b/arch/x86/net/bpf_jit_comp.c
@@ -1067,13 +1067,13 @@ common_load:
ilen = prog - temp;
if (ilen > BPF_MAX_INSN_SIZE) {
- pr_err("bpf_jit_compile fatal insn size error\n");
+ pr_err("bpf_jit: fatal insn size error\n");
return -EFAULT;
}
if (image) {
if (unlikely(proglen + ilen > oldproglen)) {
- pr_err("bpf_jit_compile fatal error\n");
+ pr_err("bpf_jit: fatal error\n");
return -EFAULT;
}
memcpy(image + proglen, temp, ilen);
@@ -1085,10 +1085,6 @@ common_load:
return proglen;
}
-void bpf_jit_compile(struct bpf_prog *prog)
-{
-}
-
struct bpf_prog *bpf_int_jit_compile(struct bpf_prog *prog)
{
struct bpf_binary_header *header = NULL;
@@ -1169,7 +1165,7 @@ struct bpf_prog *bpf_int_jit_compile(struct bpf_prog *prog)
if (image) {
bpf_flush_icache(header, image + proglen);
- set_memory_ro((unsigned long)header, header->pages);
+ bpf_jit_binary_lock_ro(header);
prog->bpf_func = (void *)image;
prog->jited = 1;
} else {
@@ -1184,18 +1180,3 @@ out:
tmp : orig_prog);
return prog;
}
-
-void bpf_jit_free(struct bpf_prog *fp)
-{
- unsigned long addr = (unsigned long)fp->bpf_func & PAGE_MASK;
- struct bpf_binary_header *header = (void *)addr;
-
- if (!fp->jited)
- goto free_filter;
-
- set_memory_rw(addr, header->pages);
- bpf_jit_binary_free(header);
-
-free_filter:
- bpf_prog_unlock_free(fp);
-}
diff --git a/arch/x86/platform/goldfish/goldfish.c b/arch/x86/platform/goldfish/goldfish.c
index 1693107a518e..0d17c0aafeb1 100644
--- a/arch/x86/platform/goldfish/goldfish.c
+++ b/arch/x86/platform/goldfish/goldfish.c
@@ -42,10 +42,22 @@ static struct resource goldfish_pdev_bus_resources[] = {
}
};
+static bool goldfish_enable __initdata;
+
+static int __init goldfish_setup(char *str)
+{
+ goldfish_enable = true;
+ return 0;
+}
+__setup("goldfish", goldfish_setup);
+
static int __init goldfish_init(void)
{
+ if (!goldfish_enable)
+ return -ENODEV;
+
platform_device_register_simple("goldfish_pdev_bus", -1,
- goldfish_pdev_bus_resources, 2);
+ goldfish_pdev_bus_resources, 2);
return 0;
}
device_initcall(goldfish_init);
diff --git a/arch/x86/xen/Kconfig b/arch/x86/xen/Kconfig
index c7b15f3e2cf3..76b6dbd627df 100644
--- a/arch/x86/xen/Kconfig
+++ b/arch/x86/xen/Kconfig
@@ -53,5 +53,5 @@ config XEN_DEBUG_FS
config XEN_PVH
bool "Support for running as a PVH guest"
- depends on X86_64 && XEN && XEN_PVHVM
+ depends on XEN && XEN_PVHVM && ACPI
def_bool n
diff --git a/arch/x86/xen/Makefile b/arch/x86/xen/Makefile
index e47e52787d32..cb0164aee156 100644
--- a/arch/x86/xen/Makefile
+++ b/arch/x86/xen/Makefile
@@ -23,3 +23,4 @@ obj-$(CONFIG_XEN_DEBUG_FS) += debugfs.o
obj-$(CONFIG_XEN_DOM0) += vga.o
obj-$(CONFIG_SWIOTLB_XEN) += pci-swiotlb-xen.o
obj-$(CONFIG_XEN_EFI) += efi.o
+obj-$(CONFIG_XEN_PVH) += xen-pvh.o
diff --git a/arch/x86/xen/apic.c b/arch/x86/xen/apic.c
index 44c88ad1841a..bcea81f36fc5 100644
--- a/arch/x86/xen/apic.c
+++ b/arch/x86/xen/apic.c
@@ -145,7 +145,7 @@ static void xen_silent_inquire(int apicid)
static int xen_cpu_present_to_apicid(int cpu)
{
if (cpu_present(cpu))
- return xen_get_apic_id(xen_apic_read(APIC_ID));
+ return cpu_data(cpu).apicid;
else
return BAD_APICID;
}
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 51ef95232725..ec1d5c46e58f 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -45,6 +45,7 @@
#include <xen/interface/memory.h>
#include <xen/interface/nmi.h>
#include <xen/interface/xen-mca.h>
+#include <xen/interface/hvm/start_info.h>
#include <xen/features.h>
#include <xen/page.h>
#include <xen/hvm.h>
@@ -176,6 +177,20 @@ struct tls_descs {
*/
static DEFINE_PER_CPU(struct tls_descs, shadow_tls_desc);
+#ifdef CONFIG_XEN_PVH
+/*
+ * PVH variables.
+ *
+ * xen_pvh and pvh_bootparams need to live in data segment since they
+ * are used after startup_{32|64}, which clear .bss, are invoked.
+ */
+bool xen_pvh __attribute__((section(".data"))) = 0;
+struct boot_params pvh_bootparams __attribute__((section(".data")));
+
+struct hvm_start_info pvh_start_info;
+unsigned int pvh_start_info_sz = sizeof(pvh_start_info);
+#endif
+
static void clamp_max_cpus(void)
{
#ifdef CONFIG_SMP
@@ -1138,10 +1153,11 @@ void xen_setup_vcpu_info_placement(void)
xen_vcpu_setup(cpu);
}
- /* xen_vcpu_setup managed to place the vcpu_info within the
- * percpu area for all cpus, so make use of it. Note that for
- * PVH we want to use native IRQ mechanism. */
- if (have_vcpu_info_placement && !xen_pvh_domain()) {
+ /*
+ * xen_vcpu_setup managed to place the vcpu_info within the
+ * percpu area for all cpus, so make use of it.
+ */
+ if (have_vcpu_info_placement) {
pv_irq_ops.save_fl = __PV_IS_CALLEE_SAVE(xen_save_fl_direct);
pv_irq_ops.restore_fl = __PV_IS_CALLEE_SAVE(xen_restore_fl_direct);
pv_irq_ops.irq_disable = __PV_IS_CALLEE_SAVE(xen_irq_disable_direct);
@@ -1413,49 +1429,9 @@ static void __init xen_boot_params_init_edd(void)
* Set up the GDT and segment registers for -fstack-protector. Until
* we do this, we have to be careful not to call any stack-protected
* function, which is most of the kernel.
- *
- * Note, that it is __ref because the only caller of this after init
- * is PVH which is not going to use xen_load_gdt_boot or other
- * __init functions.
*/
-static void __ref xen_setup_gdt(int cpu)
+static void xen_setup_gdt(int cpu)
{
- if (xen_feature(XENFEAT_auto_translated_physmap)) {
-#ifdef CONFIG_X86_64
- unsigned long dummy;
-
- load_percpu_segment(cpu); /* We need to access per-cpu area */
- switch_to_new_gdt(cpu); /* GDT and GS set */
-
- /* We are switching of the Xen provided GDT to our HVM mode
- * GDT. The new GDT has __KERNEL_CS with CS.L = 1
- * and we are jumping to reload it.
- */
- asm volatile ("pushq %0\n"
- "leaq 1f(%%rip),%0\n"
- "pushq %0\n"
- "lretq\n"
- "1:\n"
- : "=&r" (dummy) : "0" (__KERNEL_CS));
-
- /*
- * While not needed, we also set the %es, %ds, and %fs
- * to zero. We don't care about %ss as it is NULL.
- * Strictly speaking this is not needed as Xen zeros those
- * out (and also MSR_FS_BASE, MSR_GS_BASE, MSR_KERNEL_GS_BASE)
- *
- * Linux zeros them in cpu_init() and in secondary_startup_64
- * (for BSP).
- */
- loadsegment(es, 0);
- loadsegment(ds, 0);
- loadsegment(fs, 0);
-#else
- /* PVH: TODO Implement. */
- BUG();
-#endif
- return; /* PVH does not need any PV GDT ops. */
- }
pv_cpu_ops.write_gdt_entry = xen_write_gdt_entry_boot;
pv_cpu_ops.load_gdt = xen_load_gdt_boot;
@@ -1466,59 +1442,6 @@ static void __ref xen_setup_gdt(int cpu)
pv_cpu_ops.load_gdt = xen_load_gdt;
}
-#ifdef CONFIG_XEN_PVH
-/*
- * A PV guest starts with default flags that are not set for PVH, set them
- * here asap.
- */
-static void xen_pvh_set_cr_flags(int cpu)
-{
-
- /* Some of these are setup in 'secondary_startup_64'. The others:
- * X86_CR0_TS, X86_CR0_PE, X86_CR0_ET are set by Xen for HVM guests
- * (which PVH shared codepaths), while X86_CR0_PG is for PVH. */
- write_cr0(read_cr0() | X86_CR0_MP | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM);
-
- if (!cpu)
- return;
- /*
- * For BSP, PSE PGE are set in probe_page_size_mask(), for APs
- * set them here. For all, OSFXSR OSXMMEXCPT are set in fpu__init_cpu().
- */
- if (boot_cpu_has(X86_FEATURE_PSE))
- cr4_set_bits_and_update_boot(X86_CR4_PSE);
-
- if (boot_cpu_has(X86_FEATURE_PGE))
- cr4_set_bits_and_update_boot(X86_CR4_PGE);
-}
-
-/*
- * Note, that it is ref - because the only caller of this after init
- * is PVH which is not going to use xen_load_gdt_boot or other
- * __init functions.
- */
-void __ref xen_pvh_secondary_vcpu_init(int cpu)
-{
- xen_setup_gdt(cpu);
- xen_pvh_set_cr_flags(cpu);
-}
-
-static void __init xen_pvh_early_guest_init(void)
-{
- if (!xen_feature(XENFEAT_auto_translated_physmap))
- return;
-
- BUG_ON(!xen_feature(XENFEAT_hvm_callback_vector));
-
- xen_pvh_early_cpu_init(0, false);
- xen_pvh_set_cr_flags(0);
-
-#ifdef CONFIG_X86_32
- BUG(); /* PVH: Implement proper support. */
-#endif
-}
-#endif /* CONFIG_XEN_PVH */
-
static void __init xen_dom0_set_legacy_features(void)
{
x86_platform.legacy.rtc = 1;
@@ -1555,24 +1478,17 @@ asmlinkage __visible void __init xen_start_kernel(void)
xen_domain_type = XEN_PV_DOMAIN;
xen_setup_features();
-#ifdef CONFIG_XEN_PVH
- xen_pvh_early_guest_init();
-#endif
+
xen_setup_machphys_mapping();
/* Install Xen paravirt ops */
pv_info = xen_info;
pv_init_ops = xen_init_ops;
- if (!xen_pvh_domain()) {
- pv_cpu_ops = xen_cpu_ops;
+ pv_cpu_ops = xen_cpu_ops;
- x86_platform.get_nmi_reason = xen_get_nmi_reason;
- }
+ x86_platform.get_nmi_reason = xen_get_nmi_reason;
- if (xen_feature(XENFEAT_auto_translated_physmap))
- x86_init.resources.memory_setup = xen_auto_xlated_memory_setup;
- else
- x86_init.resources.memory_setup = xen_memory_setup;
+ x86_init.resources.memory_setup = xen_memory_setup;
x86_init.oem.arch_setup = xen_arch_setup;
x86_init.oem.banner = xen_banner;
@@ -1665,18 +1581,15 @@ asmlinkage __visible void __init xen_start_kernel(void)
/* set the limit of our address space */
xen_reserve_top();
- /* PVH: runs at default kernel iopl of 0 */
- if (!xen_pvh_domain()) {
- /*
- * We used to do this in xen_arch_setup, but that is too late
- * on AMD were early_cpu_init (run before ->arch_setup()) calls
- * early_amd_init which pokes 0xcf8 port.
- */
- set_iopl.iopl = 1;
- rc = HYPERVISOR_physdev_op(PHYSDEVOP_set_iopl, &set_iopl);
- if (rc != 0)
- xen_raw_printk("physdev_op failed %d\n", rc);
- }
+ /*
+ * We used to do this in xen_arch_setup, but that is too late
+ * on AMD were early_cpu_init (run before ->arch_setup()) calls
+ * early_amd_init which pokes 0xcf8 port.
+ */
+ set_iopl.iopl = 1;
+ rc = HYPERVISOR_physdev_op(PHYSDEVOP_set_iopl, &set_iopl);
+ if (rc != 0)
+ xen_raw_printk("physdev_op failed %d\n", rc);
#ifdef CONFIG_X86_32
/* set up basic CPUID stuff */
@@ -1758,6 +1671,102 @@ asmlinkage __visible void __init xen_start_kernel(void)
#endif
}
+#ifdef CONFIG_XEN_PVH
+
+static void xen_pvh_arch_setup(void)
+{
+#ifdef CONFIG_ACPI
+ /* Make sure we don't fall back to (default) ACPI_IRQ_MODEL_PIC. */
+ if (nr_ioapics == 0)
+ acpi_irq_model = ACPI_IRQ_MODEL_PLATFORM;
+#endif
+}
+
+static void __init init_pvh_bootparams(void)
+{
+ struct xen_memory_map memmap;
+ unsigned int i;
+ int rc;
+
+ memset(&pvh_bootparams, 0, sizeof(pvh_bootparams));
+
+ memmap.nr_entries = ARRAY_SIZE(pvh_bootparams.e820_map);
+ set_xen_guest_handle(memmap.buffer, pvh_bootparams.e820_map);
+ rc = HYPERVISOR_memory_op(XENMEM_memory_map, &memmap);
+ if (rc) {
+ xen_raw_printk("XENMEM_memory_map failed (%d)\n", rc);
+ BUG();
+ }
+
+ if (memmap.nr_entries < E820MAX - 1) {
+ pvh_bootparams.e820_map[memmap.nr_entries].addr =
+ ISA_START_ADDRESS;
+ pvh_bootparams.e820_map[memmap.nr_entries].size =
+ ISA_END_ADDRESS - ISA_START_ADDRESS;
+ pvh_bootparams.e820_map[memmap.nr_entries].type =
+ E820_RESERVED;
+ memmap.nr_entries++;
+ } else
+ xen_raw_printk("Warning: Can fit ISA range into e820\n");
+
+ sanitize_e820_map(pvh_bootparams.e820_map,
+ ARRAY_SIZE(pvh_bootparams.e820_map),
+ &memmap.nr_entries);
+
+ pvh_bootparams.e820_entries = memmap.nr_entries;
+ for (i = 0; i < pvh_bootparams.e820_entries; i++)
+ e820_add_region(pvh_bootparams.e820_map[i].addr,
+ pvh_bootparams.e820_map[i].size,
+ pvh_bootparams.e820_map[i].type);
+
+ pvh_bootparams.hdr.cmd_line_ptr =
+ pvh_start_info.cmdline_paddr;
+
+ /* The first module is always ramdisk. */
+ if (pvh_start_info.nr_modules) {
+ struct hvm_modlist_entry *modaddr =
+ __va(pvh_start_info.modlist_paddr);
+ pvh_bootparams.hdr.ramdisk_image = modaddr->paddr;
+ pvh_bootparams.hdr.ramdisk_size = modaddr->size;
+ }
+
+ /*
+ * See Documentation/x86/boot.txt.
+ *
+ * Version 2.12 supports Xen entry point but we will use default x86/PC
+ * environment (i.e. hardware_subarch 0).
+ */
+ pvh_bootparams.hdr.version = 0x212;
+ pvh_bootparams.hdr.type_of_loader = (9 << 4) | 0; /* Xen loader */
+}
+
+/*
+ * This routine (and those that it might call) should not use
+ * anything that lives in .bss since that segment will be cleared later.
+ */
+void __init xen_prepare_pvh(void)
+{
+ u32 msr;
+ u64 pfn;
+
+ if (pvh_start_info.magic != XEN_HVM_START_MAGIC_VALUE) {
+ xen_raw_printk("Error: Unexpected magic value (0x%08x)\n",
+ pvh_start_info.magic);
+ BUG();
+ }
+
+ xen_pvh = 1;
+
+ msr = cpuid_ebx(xen_cpuid_base() + 2);
+ pfn = __pa(hypercall_page);
+ wrmsr_safe(msr, (u32)pfn, (u32)(pfn >> 32));
+
+ init_pvh_bootparams();
+
+ x86_init.oem.arch_setup = xen_pvh_arch_setup;
+}
+#endif
+
void __ref xen_hvm_init_shared_info(void)
{
int cpu;
@@ -1797,20 +1806,29 @@ void __ref xen_hvm_init_shared_info(void)
static void __init init_hvm_pv_info(void)
{
int major, minor;
- uint32_t eax, ebx, ecx, edx, pages, msr, base;
- u64 pfn;
+ uint32_t eax, ebx, ecx, edx, base;
base = xen_cpuid_base();
- cpuid(base + 1, &eax, &ebx, &ecx, &edx);
+ eax = cpuid_eax(base + 1);
major = eax >> 16;
minor = eax & 0xffff;
printk(KERN_INFO "Xen version %d.%d.\n", major, minor);
- cpuid(base + 2, &pages, &msr, &ecx, &edx);
+ xen_domain_type = XEN_HVM_DOMAIN;
- pfn = __pa(hypercall_page);
- wrmsr_safe(msr, (u32)pfn, (u32)(pfn >> 32));
+ /* PVH set up hypercall page in xen_prepare_pvh(). */
+ if (xen_pvh_domain())
+ pv_info.name = "Xen PVH";
+ else {
+ u64 pfn;
+ uint32_t msr;
+
+ pv_info.name = "Xen HVM";
+ msr = cpuid_ebx(base + 2);
+ pfn = __pa(hypercall_page);
+ wrmsr_safe(msr, (u32)pfn, (u32)(pfn >> 32));
+ }
xen_setup_features();
@@ -1819,10 +1837,6 @@ static void __init init_hvm_pv_info(void)
this_cpu_write(xen_vcpu_id, ebx);
else
this_cpu_write(xen_vcpu_id, smp_processor_id());
-
- pv_info.name = "Xen HVM";
-
- xen_domain_type = XEN_HVM_DOMAIN;
}
#endif
@@ -1910,6 +1924,9 @@ static void __init xen_hvm_guest_init(void)
x86_init.irqs.intr_init = xen_init_IRQ;
xen_hvm_init_time_ops();
xen_hvm_init_mmu_ops();
+
+ if (xen_pvh_domain())
+ machine_ops.emergency_restart = xen_emergency_restart;
#ifdef CONFIG_KEXEC_CORE
machine_ops.shutdown = xen_hvm_shutdown;
machine_ops.crash_shutdown = xen_hvm_crash_shutdown;
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index 7d5afdb417cc..f6740b5b1738 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -1792,10 +1792,6 @@ static void __init set_page_prot_flags(void *addr, pgprot_t prot,
unsigned long pfn = __pa(addr) >> PAGE_SHIFT;
pte_t pte = pfn_pte(pfn, prot);
- /* For PVH no need to set R/O or R/W to pin them or unpin them. */
- if (xen_feature(XENFEAT_auto_translated_physmap))
- return;
-
if (HYPERVISOR_update_va_mapping((unsigned long)addr, pte, flags))
BUG();
}
@@ -1902,8 +1898,7 @@ static void __init check_pt_base(unsigned long *pt_base, unsigned long *pt_end,
* level2_ident_pgt, and level2_kernel_pgt. This means that only the
* kernel has a physical mapping to start with - but that's enough to
* get __va working. We need to fill in the rest of the physical
- * mapping once some sort of allocator has been set up. NOTE: for
- * PVH, the page tables are native.
+ * mapping once some sort of allocator has been set up.
*/
void __init xen_setup_kernel_pagetable(pgd_t *pgd, unsigned long max_pfn)
{
@@ -2812,16 +2807,6 @@ static int do_remap_gfn(struct vm_area_struct *vma,
BUG_ON(!((vma->vm_flags & (VM_PFNMAP | VM_IO)) == (VM_PFNMAP | VM_IO)));
- if (xen_feature(XENFEAT_auto_translated_physmap)) {
-#ifdef CONFIG_XEN_PVH
- /* We need to update the local page tables and the xen HAP */
- return xen_xlate_remap_gfn_array(vma, addr, gfn, nr, err_ptr,
- prot, domid, pages);
-#else
- return -EINVAL;
-#endif
- }
-
rmd.mfn = gfn;
rmd.prot = prot;
/* We use the err_ptr to indicate if there we are doing a contiguous
@@ -2915,10 +2900,6 @@ int xen_unmap_domain_gfn_range(struct vm_area_struct *vma,
if (!pages || !xen_feature(XENFEAT_auto_translated_physmap))
return 0;
-#ifdef CONFIG_XEN_PVH
- return xen_xlate_unmap_gfn_range(vma, numpgs, pages);
-#else
return -EINVAL;
-#endif
}
EXPORT_SYMBOL_GPL(xen_unmap_domain_gfn_range);
diff --git a/arch/x86/xen/platform-pci-unplug.c b/arch/x86/xen/platform-pci-unplug.c
index 90d1b83cf35f..33a783c77d96 100644
--- a/arch/x86/xen/platform-pci-unplug.c
+++ b/arch/x86/xen/platform-pci-unplug.c
@@ -73,8 +73,8 @@ bool xen_has_pv_devices(void)
if (!xen_domain())
return false;
- /* PV domains always have them. */
- if (xen_pv_domain())
+ /* PV and PVH domains always have them. */
+ if (xen_pv_domain() || xen_pvh_domain())
return true;
/* And user has xen_platform_pci=0 set in guest config as
diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
index f3f7b41116f7..a8c306cf8868 100644
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -915,39 +915,6 @@ char * __init xen_memory_setup(void)
}
/*
- * Machine specific memory setup for auto-translated guests.
- */
-char * __init xen_auto_xlated_memory_setup(void)
-{
- struct xen_memory_map memmap;
- int i;
- int rc;
-
- memmap.nr_entries = ARRAY_SIZE(xen_e820_map);
- set_xen_guest_handle(memmap.buffer, xen_e820_map);
-
- rc = HYPERVISOR_memory_op(XENMEM_memory_map, &memmap);
- if (rc < 0)
- panic("No memory map (%d)\n", rc);
-
- xen_e820_map_entries = memmap.nr_entries;
-
- sanitize_e820_map(xen_e820_map, ARRAY_SIZE(xen_e820_map),
- &xen_e820_map_entries);
-
- for (i = 0; i < xen_e820_map_entries; i++)
- e820_add_region(xen_e820_map[i].addr, xen_e820_map[i].size,
- xen_e820_map[i].type);
-
- /* Remove p2m info, it is not needed. */
- xen_start_info->mfn_list = 0;
- xen_start_info->first_p2m_pfn = 0;
- xen_start_info->nr_p2m_frames = 0;
-
- return "Xen";
-}
-
-/*
* Set the bit indicating "nosegneg" library variants should be used.
* We only need to bother in pure 32-bit mode; compat 32-bit processes
* can have un-truncated segments, so wrapping around is allowed.
@@ -1032,8 +999,8 @@ void __init xen_pvmmu_arch_setup(void)
void __init xen_arch_setup(void)
{
xen_panic_handler_init();
- if (!xen_feature(XENFEAT_auto_translated_physmap))
- xen_pvmmu_arch_setup();
+
+ xen_pvmmu_arch_setup();
#ifdef CONFIG_ACPI
if (!(xen_start_info->flags & SIF_INITDOMAIN)) {
diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c
index 311acad7dad2..0dee6f59ea82 100644
--- a/arch/x86/xen/smp.c
+++ b/arch/x86/xen/smp.c
@@ -99,18 +99,8 @@ static void cpu_bringup(void)
local_irq_enable();
}
-/*
- * Note: cpu parameter is only relevant for PVH. The reason for passing it
- * is we can't do smp_processor_id until the percpu segments are loaded, for
- * which we need the cpu number! So we pass it in rdi as first parameter.
- */
-asmlinkage __visible void cpu_bringup_and_idle(int cpu)
+asmlinkage __visible void cpu_bringup_and_idle(void)
{
-#ifdef CONFIG_XEN_PVH
- if (xen_feature(XENFEAT_auto_translated_physmap) &&
- xen_feature(XENFEAT_supervisor_mode_kernel))
- xen_pvh_secondary_vcpu_init(cpu);
-#endif
cpu_bringup();
cpu_startup_entry(CPUHP_AP_ONLINE_IDLE);
}
@@ -404,61 +394,47 @@ cpu_initialize_context(unsigned int cpu, struct task_struct *idle)
gdt = get_cpu_gdt_table(cpu);
#ifdef CONFIG_X86_32
- /* Note: PVH is not yet supported on x86_32. */
ctxt->user_regs.fs = __KERNEL_PERCPU;
ctxt->user_regs.gs = __KERNEL_STACK_CANARY;
#endif
memset(&ctxt->fpu_ctxt, 0, sizeof(ctxt->fpu_ctxt));
- if (!xen_feature(XENFEAT_auto_translated_physmap)) {
- ctxt->user_regs.eip = (unsigned long)cpu_bringup_and_idle;
- ctxt->flags = VGCF_IN_KERNEL;
- ctxt->user_regs.eflags = 0x1000; /* IOPL_RING1 */
- ctxt->user_regs.ds = __USER_DS;
- ctxt->user_regs.es = __USER_DS;
- ctxt->user_regs.ss = __KERNEL_DS;
+ ctxt->user_regs.eip = (unsigned long)cpu_bringup_and_idle;
+ ctxt->flags = VGCF_IN_KERNEL;
+ ctxt->user_regs.eflags = 0x1000; /* IOPL_RING1 */
+ ctxt->user_regs.ds = __USER_DS;
+ ctxt->user_regs.es = __USER_DS;
+ ctxt->user_regs.ss = __KERNEL_DS;
- xen_copy_trap_info(ctxt->trap_ctxt);
+ xen_copy_trap_info(ctxt->trap_ctxt);
- ctxt->ldt_ents = 0;
+ ctxt->ldt_ents = 0;
- BUG_ON((unsigned long)gdt & ~PAGE_MASK);
+ BUG_ON((unsigned long)gdt & ~PAGE_MASK);
- gdt_mfn = arbitrary_virt_to_mfn(gdt);
- make_lowmem_page_readonly(gdt);
- make_lowmem_page_readonly(mfn_to_virt(gdt_mfn));
+ gdt_mfn = arbitrary_virt_to_mfn(gdt);
+ make_lowmem_page_readonly(gdt);
+ make_lowmem_page_readonly(mfn_to_virt(gdt_mfn));
- ctxt->gdt_frames[0] = gdt_mfn;
- ctxt->gdt_ents = GDT_ENTRIES;
+ ctxt->gdt_frames[0] = gdt_mfn;
+ ctxt->gdt_ents = GDT_ENTRIES;
- ctxt->kernel_ss = __KERNEL_DS;
- ctxt->kernel_sp = idle->thread.sp0;
+ ctxt->kernel_ss = __KERNEL_DS;
+ ctxt->kernel_sp = idle->thread.sp0;
#ifdef CONFIG_X86_32
- ctxt->event_callback_cs = __KERNEL_CS;
- ctxt->failsafe_callback_cs = __KERNEL_CS;
+ ctxt->event_callback_cs = __KERNEL_CS;
+ ctxt->failsafe_callback_cs = __KERNEL_CS;
#else
- ctxt->gs_base_kernel = per_cpu_offset(cpu);
-#endif
- ctxt->event_callback_eip =
- (unsigned long)xen_hypervisor_callback;
- ctxt->failsafe_callback_eip =
- (unsigned long)xen_failsafe_callback;
- ctxt->user_regs.cs = __KERNEL_CS;
- per_cpu(xen_cr3, cpu) = __pa(swapper_pg_dir);
- }
-#ifdef CONFIG_XEN_PVH
- else {
- /*
- * The vcpu comes on kernel page tables which have the NX pte
- * bit set. This means before DS/SS is touched, NX in
- * EFER must be set. Hence the following assembly glue code.
- */
- ctxt->user_regs.eip = (unsigned long)xen_pvh_early_cpu_init;
- ctxt->user_regs.rdi = cpu;
- ctxt->user_regs.rsi = true; /* entry == true */
- }
+ ctxt->gs_base_kernel = per_cpu_offset(cpu);
#endif
+ ctxt->event_callback_eip =
+ (unsigned long)xen_hypervisor_callback;
+ ctxt->failsafe_callback_eip =
+ (unsigned long)xen_failsafe_callback;
+ ctxt->user_regs.cs = __KERNEL_CS;
+ per_cpu(xen_cr3, cpu) = __pa(swapper_pg_dir);
+
ctxt->user_regs.esp = idle->thread.sp0 - sizeof(struct pt_regs);
ctxt->ctrlreg[3] = xen_pfn_to_cr3(virt_to_gfn(swapper_pg_dir));
if (HYPERVISOR_vcpu_op(VCPUOP_initialise, xen_vcpu_nr(cpu), ctxt))
diff --git a/arch/x86/xen/smp.h b/arch/x86/xen/smp.h
index c5c16dc4f694..9beef333584a 100644
--- a/arch/x86/xen/smp.h
+++ b/arch/x86/xen/smp.h
@@ -21,12 +21,4 @@ static inline int xen_smp_intr_init(unsigned int cpu)
static inline void xen_smp_intr_free(unsigned int cpu) {}
#endif /* CONFIG_SMP */
-#ifdef CONFIG_XEN_PVH
-extern void xen_pvh_early_cpu_init(int cpu, bool entry);
-#else
-static inline void xen_pvh_early_cpu_init(int cpu, bool entry)
-{
-}
-#endif
-
#endif
diff --git a/arch/x86/xen/xen-head.S b/arch/x86/xen/xen-head.S
index 7f8d8abf4c1a..37794e42b67d 100644
--- a/arch/x86/xen/xen-head.S
+++ b/arch/x86/xen/xen-head.S
@@ -16,25 +16,6 @@
#include <xen/interface/xen-mca.h>
#include <asm/xen/interface.h>
-#ifdef CONFIG_XEN_PVH
-#define PVH_FEATURES_STR "|writable_descriptor_tables|auto_translated_physmap|supervisor_mode_kernel"
-/* Note the lack of 'hvm_callback_vector'. Older hypervisor will
- * balk at this being part of XEN_ELFNOTE_FEATURES, so we put it in
- * XEN_ELFNOTE_SUPPORTED_FEATURES which older hypervisors will ignore.
- */
-#define PVH_FEATURES ((1 << XENFEAT_writable_page_tables) | \
- (1 << XENFEAT_auto_translated_physmap) | \
- (1 << XENFEAT_supervisor_mode_kernel) | \
- (1 << XENFEAT_hvm_callback_vector))
-/* The XENFEAT_writable_page_tables is not stricly necessary as we set that
- * up regardless whether this CONFIG option is enabled or not, but it
- * clarifies what the right flags need to be.
- */
-#else
-#define PVH_FEATURES_STR ""
-#define PVH_FEATURES (0)
-#endif
-
__INIT
ENTRY(startup_xen)
cld
@@ -54,41 +35,6 @@ ENTRY(startup_xen)
__FINIT
-#ifdef CONFIG_XEN_PVH
-/*
- * xen_pvh_early_cpu_init() - early PVH VCPU initialization
- * @cpu: this cpu number (%rdi)
- * @entry: true if this is a secondary vcpu coming up on this entry
- * point, false if this is the boot CPU being initialized for
- * the first time (%rsi)
- *
- * Note: This is called as a function on the boot CPU, and is the entry point
- * on the secondary CPU.
- */
-ENTRY(xen_pvh_early_cpu_init)
- mov %rsi, %r11
-
- /* Gather features to see if NX implemented. */
- mov $0x80000001, %eax
- cpuid
- mov %edx, %esi
-
- mov $MSR_EFER, %ecx
- rdmsr
- bts $_EFER_SCE, %eax
-
- bt $20, %esi
- jnc 1f /* No NX, skip setting it */
- bts $_EFER_NX, %eax
-1: wrmsr
-#ifdef CONFIG_SMP
- cmp $0, %r11b
- jne cpu_bringup_and_idle
-#endif
- ret
-
-#endif /* CONFIG_XEN_PVH */
-
.pushsection .text
.balign PAGE_SIZE
ENTRY(hypercall_page)
@@ -114,10 +60,10 @@ ENTRY(hypercall_page)
#endif
ELFNOTE(Xen, XEN_ELFNOTE_ENTRY, _ASM_PTR startup_xen)
ELFNOTE(Xen, XEN_ELFNOTE_HYPERCALL_PAGE, _ASM_PTR hypercall_page)
- ELFNOTE(Xen, XEN_ELFNOTE_FEATURES, .ascii "!writable_page_tables|pae_pgdir_above_4gb"; .asciz PVH_FEATURES_STR)
- ELFNOTE(Xen, XEN_ELFNOTE_SUPPORTED_FEATURES, .long (PVH_FEATURES) |
- (1 << XENFEAT_writable_page_tables) |
- (1 << XENFEAT_dom0))
+ ELFNOTE(Xen, XEN_ELFNOTE_FEATURES,
+ .ascii "!writable_page_tables|pae_pgdir_above_4gb")
+ ELFNOTE(Xen, XEN_ELFNOTE_SUPPORTED_FEATURES,
+ .long (1 << XENFEAT_writable_page_tables) | (1 << XENFEAT_dom0))
ELFNOTE(Xen, XEN_ELFNOTE_PAE_MODE, .asciz "yes")
ELFNOTE(Xen, XEN_ELFNOTE_LOADER, .asciz "generic")
ELFNOTE(Xen, XEN_ELFNOTE_L1_MFN_VALID,
diff --git a/arch/x86/xen/xen-ops.h b/arch/x86/xen/xen-ops.h
index ac0a2b0f9e62..f6a41c41ebc7 100644
--- a/arch/x86/xen/xen-ops.h
+++ b/arch/x86/xen/xen-ops.h
@@ -146,5 +146,4 @@ __visible void xen_adjust_exception_frame(void);
extern int xen_panic_handler_init(void);
-void xen_pvh_secondary_vcpu_init(int cpu);
#endif /* XEN_OPS_H */
diff --git a/arch/x86/xen/xen-pvh.S b/arch/x86/xen/xen-pvh.S
new file mode 100644
index 000000000000..5e246716d58f
--- /dev/null
+++ b/arch/x86/xen/xen-pvh.S
@@ -0,0 +1,161 @@
+/*
+ * Copyright C 2016, Oracle and/or its affiliates. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+ .code32
+ .text
+#define _pa(x) ((x) - __START_KERNEL_map)
+
+#include <linux/elfnote.h>
+#include <linux/init.h>
+#include <linux/linkage.h>
+#include <asm/segment.h>
+#include <asm/asm.h>
+#include <asm/boot.h>
+#include <asm/processor-flags.h>
+#include <asm/msr.h>
+#include <xen/interface/elfnote.h>
+
+ __HEAD
+
+/*
+ * Entry point for PVH guests.
+ *
+ * Xen ABI specifies the following register state when we come here:
+ *
+ * - `ebx`: contains the physical memory address where the loader has placed
+ * the boot start info structure.
+ * - `cr0`: bit 0 (PE) must be set. All the other writeable bits are cleared.
+ * - `cr4`: all bits are cleared.
+ * - `cs `: must be a 32-bit read/execute code segment with a base of ‘0’
+ * and a limit of ‘0xFFFFFFFF’. The selector value is unspecified.
+ * - `ds`, `es`: must be a 32-bit read/write data segment with a base of
+ * ‘0’ and a limit of ‘0xFFFFFFFF’. The selector values are all
+ * unspecified.
+ * - `tr`: must be a 32-bit TSS (active) with a base of '0' and a limit
+ * of '0x67'.
+ * - `eflags`: bit 17 (VM) must be cleared. Bit 9 (IF) must be cleared.
+ * Bit 8 (TF) must be cleared. Other bits are all unspecified.
+ *
+ * All other processor registers and flag bits are unspecified. The OS is in
+ * charge of setting up it's own stack, GDT and IDT.
+ */
+
+ENTRY(pvh_start_xen)
+ cld
+
+ lgdt (_pa(gdt))
+
+ mov $(__BOOT_DS),%eax
+ mov %eax,%ds
+ mov %eax,%es
+ mov %eax,%ss
+
+ /* Stash hvm_start_info. */
+ mov $_pa(pvh_start_info), %edi
+ mov %ebx, %esi
+ mov _pa(pvh_start_info_sz), %ecx
+ shr $2,%ecx
+ rep
+ movsl
+
+ mov $_pa(early_stack_end), %esp
+
+ /* Enable PAE mode. */
+ mov %cr4, %eax
+ orl $X86_CR4_PAE, %eax
+ mov %eax, %cr4
+
+#ifdef CONFIG_X86_64
+ /* Enable Long mode. */
+ mov $MSR_EFER, %ecx
+ rdmsr
+ btsl $_EFER_LME, %eax
+ wrmsr
+
+ /* Enable pre-constructed page tables. */
+ mov $_pa(init_level4_pgt), %eax
+ mov %eax, %cr3
+ mov $(X86_CR0_PG | X86_CR0_PE), %eax
+ mov %eax, %cr0
+
+ /* Jump to 64-bit mode. */
+ ljmp $__KERNEL_CS, $_pa(1f)
+
+ /* 64-bit entry point. */
+ .code64
+1:
+ call xen_prepare_pvh
+
+ /* startup_64 expects boot_params in %rsi. */
+ mov $_pa(pvh_bootparams), %rsi
+ mov $_pa(startup_64), %rax
+ jmp *%rax
+
+#else /* CONFIG_X86_64 */
+
+ call mk_early_pgtbl_32
+
+ mov $_pa(initial_page_table), %eax
+ mov %eax, %cr3
+
+ mov %cr0, %eax
+ or $(X86_CR0_PG | X86_CR0_PE), %eax
+ mov %eax, %cr0
+
+ ljmp $__BOOT_CS, $1f
+1:
+ call xen_prepare_pvh
+ mov $_pa(pvh_bootparams), %esi
+
+ /* startup_32 doesn't expect paging and PAE to be on. */
+ ljmp $__BOOT_CS, $_pa(2f)
+2:
+ mov %cr0, %eax
+ and $~X86_CR0_PG, %eax
+ mov %eax, %cr0
+ mov %cr4, %eax
+ and $~X86_CR4_PAE, %eax
+ mov %eax, %cr4
+
+ ljmp $__BOOT_CS, $_pa(startup_32)
+#endif
+END(pvh_start_xen)
+
+ .section ".init.data","aw"
+ .balign 8
+gdt:
+ .word gdt_end - gdt_start
+ .long _pa(gdt_start)
+ .word 0
+gdt_start:
+ .quad 0x0000000000000000 /* NULL descriptor */
+ .quad 0x0000000000000000 /* reserved */
+#ifdef CONFIG_X86_64
+ .quad GDT_ENTRY(0xa09a, 0, 0xfffff) /* __KERNEL_CS */
+#else
+ .quad GDT_ENTRY(0xc09a, 0, 0xfffff) /* __KERNEL_CS */
+#endif
+ .quad GDT_ENTRY(0xc092, 0, 0xfffff) /* __KERNEL_DS */
+gdt_end:
+
+ .balign 4
+early_stack:
+ .fill 256, 1, 0
+early_stack_end:
+
+ ELFNOTE(Xen, XEN_ELFNOTE_PHYS32_ENTRY,
+ _ASM_PTR (pvh_start_xen - __START_KERNEL_map))
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