From: Dongjiu Geng <gengdongjiu@xxxxxxxxxx>
Add a SIGBUS signal handler. In this handler, it checks the SIGBUS type,
translates the host VA delivered by host to guest PA, then fills this PA
to guest APEI GHES memory, then notifies guest according to the SIGBUS
type.
When guest accesses the poisoned memory, it will generate a Synchronous
External Abort(SEA). Then host kernel gets an APEI notification and calls
memory_failure() to unmapped the affected page in stage 2, finally
returns to guest.
Guest continues to access the PG_hwpoison page, it will trap to KVM as
stage2 fault, then a SIGBUS_MCEERR_AR synchronous signal is delivered to
Qemu, Qemu records this error address into guest APEI GHES memory and
notifes guest using Synchronous-External-Abort(SEA).
In order to inject a vSEA, we introduce the kvm_inject_arm_sea() function
in which we can setup the type of exception and the syndrome information.
When switching to guest, the target vcpu will jump to the synchronous
external abort vector table entry.
The ESR_ELx.DFSC is set to synchronous external abort(0x10), and the
ESR_ELx.FnV is set to not valid(0x1), which will tell guest that FAR is
not valid and hold an UNKNOWN value. These values will be set to KVM
register structures through KVM_SET_ONE_REG IOCTL.
Signed-off-by: Dongjiu Geng <gengdongjiu@xxxxxxxxxx>
Signed-off-by: Xiang Zheng <zhengxiang9@xxxxxxxxxx>
Reviewed-by: Michael S. Tsirkin <mst@xxxxxxxxxx>
---
hw/acpi/acpi_ghes.c | 297 ++++++++++++++++++++++++++++++++++++
include/hw/acpi/acpi_ghes.h | 4 +
include/sysemu/kvm.h | 3 +-
target/arm/cpu.h | 4 +
target/arm/helper.c | 2 +-
target/arm/internals.h | 5 +-
target/arm/kvm64.c | 64 ++++++++
target/arm/tlb_helper.c | 2 +-
target/i386/cpu.h | 2 +
9 files changed, 377 insertions(+), 6 deletions(-)
diff --git a/hw/acpi/acpi_ghes.c b/hw/acpi/acpi_ghes.c
index 42c00ff3d3..f5b54990c0 100644
--- a/hw/acpi/acpi_ghes.c
+++ b/hw/acpi/acpi_ghes.c
@@ -39,6 +39,34 @@
/* The max size in bytes for one error block */
#define ACPI_GHES_MAX_RAW_DATA_LENGTH 0x1000
+/*
+ * The total size of Generic Error Data Entry
+ * ACPI 6.1/6.2: 18.3.2.7.1 Generic Error Data,
+ * Table 18-343 Generic Error Data Entry
+ */
+#define ACPI_GHES_DATA_LENGTH 72
+
+/*
+ * The memory section CPER size,
+ * UEFI 2.6: N.2.5 Memory Error Section
+ */
+#define ACPI_GHES_MEM_CPER_LENGTH 80
+
+/*
+ * Masks for block_status flags
+ */
+#define ACPI_GEBS_UNCORRECTABLE 1
+
+/*
+ * Values for error_severity field
+ */
+enum AcpiGenericErrorSeverity {
+ ACPI_CPER_SEV_RECOVERABLE,
+ ACPI_CPER_SEV_FATAL,
+ ACPI_CPER_SEV_CORRECTED,
+ ACPI_CPER_SEV_NONE,
+};
+
/*
* Now only support ARMv8 SEA notification type error source
*/
@@ -49,6 +77,16 @@
*/
#define ACPI_GHES_SOURCE_GENERIC_ERROR_V2 10
+#define UUID_BE(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7) \
+ {{{ ((a) >> 24) & 0xff, ((a) >> 16) & 0xff, ((a) >> 8) & 0xff, (a) & 0xff, \
+ ((b) >> 8) & 0xff, (b) & 0xff, \
+ ((c) >> 8) & 0xff, (c) & 0xff, \
+ (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) } } }
+
+#define UEFI_CPER_SEC_PLATFORM_MEM \
+ UUID_BE(0xA5BC1114, 0x6F64, 0x4EDE, 0xB8, 0x63, 0x3E, 0x83, \
+ 0xED, 0x7C, 0x83, 0xB1)
+
/*
* | +--------------------------+ 0
* | | Header |
@@ -77,6 +115,174 @@ typedef struct AcpiGhesState {
uint64_t ghes_addr_le;
} AcpiGhesState;
+/*
+ * Total size for Generic Error Status Block
+ * ACPI 6.2: 18.3.2.7.1 Generic Error Data,
+ * Table 18-380 Generic Error Status Block
+ */
+#define ACPI_GHES_GESB_SIZE 20
+/* The offset of Data Length in Generic Error Status Block */
+#define ACPI_GHES_GESB_DATA_LENGTH_OFFSET 12
+
+/*
+ * Record the value of data length for each error status block to avoid getting
+ * this value from guest.
+ */
+static uint32_t acpi_ghes_data_length[ACPI_GHES_ERROR_SOURCE_COUNT];
+
+/*
+ * Generic Error Data Entry
+ * ACPI 6.1: 18.3.2.7.1 Generic Error Data
+ */
+static void acpi_ghes_generic_error_data(GArray *table, QemuUUID section_type,
+ uint32_t error_severity, uint16_t revision,
+ uint8_t validation_bits, uint8_t flags,
+ uint32_t error_data_length, QemuUUID fru_id,
+ uint8_t *fru_text, uint64_t time_stamp)
+{
+ QemuUUID uuid_le;
+
+ /* Section Type */
+ uuid_le = qemu_uuid_bswap(section_type);
+ g_array_append_vals(table, uuid_le.data, ARRAY_SIZE(uuid_le.data));
+
+ /* Error Severity */
+ build_append_int_noprefix(table, error_severity, 4);
+ /* Revision */
+ build_append_int_noprefix(table, revision, 2);
+ /* Validation Bits */
+ build_append_int_noprefix(table, validation_bits, 1);
+ /* Flags */
+ build_append_int_noprefix(table, flags, 1);
+ /* Error Data Length */
+ build_append_int_noprefix(table, error_data_length, 4);
+
+ /* FRU Id */
+ uuid_le = qemu_uuid_bswap(fru_id);
+ g_array_append_vals(table, uuid_le.data, ARRAY_SIZE(uuid_le.data));
+
+ /* FRU Text */
+ g_array_append_vals(table, fru_text, 20);
+ /* Timestamp */
+ build_append_int_noprefix(table, time_stamp, 8);
+}
+
+/*
+ * Generic Error Status Block
+ * ACPI 6.1: 18.3.2.7.1 Generic Error Data
+ */
+static void acpi_ghes_generic_error_status(GArray *table, uint32_t block_status,
+ uint32_t raw_data_offset, uint32_t raw_data_length,
+ uint32_t data_length, uint32_t error_severity)
+{
+ /* Block Status */
+ build_append_int_noprefix(table, block_status, 4);
+ /* Raw Data Offset */
+ build_append_int_noprefix(table, raw_data_offset, 4);
+ /* Raw Data Length */
+ build_append_int_noprefix(table, raw_data_length, 4);
+ /* Data Length */
+ build_append_int_noprefix(table, data_length, 4);
+ /* Error Severity */
+ build_append_int_noprefix(table, error_severity, 4);
+}
+
+/* UEFI 2.6: N.2.5 Memory Error Section */
+static void acpi_ghes_build_append_mem_cper(GArray *table,
+ uint64_t error_physical_addr)
+{
+ /*
+ * Memory Error Record
+ */
+
+ /* Validation Bits */
+ build_append_int_noprefix(table,
+ (1UL << 14) | /* Type Valid */
+ (1UL << 1) /* Physical Address Valid */,
+ 8);
+ /* Error Status */
+ build_append_int_noprefix(table, 0, 8);
+ /* Physical Address */
+ build_append_int_noprefix(table, error_physical_addr, 8);
+ /* Skip all the detailed information normally found in such a record */
+ build_append_int_noprefix(table, 0, 48);
+ /* Memory Error Type */
+ build_append_int_noprefix(table, 0 /* Unknown error */, 1);
+ /* Skip all the detailed information normally found in such a record */
+ build_append_int_noprefix(table, 0, 7);
+}
+
+static int acpi_ghes_record_mem_error(uint64_t error_block_address,
+ uint64_t error_physical_addr,
+ uint32_t data_length)
+{
+ GArray *block;
+ uint64_t current_block_length;
+ /* Memory Error Section Type */
+ QemuUUID mem_section_id_le = UEFI_CPER_SEC_PLATFORM_MEM;
+ QemuUUID fru_id = {};
+ uint8_t fru_text[20] = {};
+
+ /*
+ * Generic Error Status Block
+ * | +---------------------+
+ * | | block_status |
+ * | +---------------------+
+ * | | raw_data_offset |
+ * | +---------------------+
+ * | | raw_data_length |
+ * | +---------------------+
+ * | | data_length |
+ * | +---------------------+
+ * | | error_severity |
+ * | +---------------------+
+ */
+ block = g_array_new(false, true /* clear */, 1);
+
+ /* The current whole length of the generic error status block */
+ current_block_length = ACPI_GHES_GESB_SIZE + data_length;
+
+ /* This is the length if adding a new generic error data entry*/
+ data_length += ACPI_GHES_DATA_LENGTH;
+ data_length += ACPI_GHES_MEM_CPER_LENGTH;
+
+ /*
+ * Check whether it will run out of the preallocated memory if adding a new
+ * generic error data entry
+ */
+ if ((data_length + ACPI_GHES_GESB_SIZE) > ACPI_GHES_MAX_RAW_DATA_LENGTH) {
+ error_report("Record CPER out of boundary!!!");
+ return ACPI_GHES_CPER_FAIL;
+ }
+
+ /* Build the new generic error status block header */
+ acpi_ghes_generic_error_status(block, cpu_to_le32(ACPI_GEBS_UNCORRECTABLE),
+ 0, 0, cpu_to_le32(data_length), cpu_to_le32(ACPI_CPER_SEV_RECOVERABLE));
+
+ /* Write back above generic error status block header to guest memory */
+ cpu_physical_memory_write(error_block_address, block->data,
+ block->len);
+
+ /* Add a new generic error data entry */
+
+ data_length = block->len;
+ /* Build this new generic error data entry header */
+ acpi_ghes_generic_error_data(block, mem_section_id_le,
+ cpu_to_le32(ACPI_CPER_SEV_RECOVERABLE), cpu_to_le32(0x300), 0, 0,
+ cpu_to_le32(ACPI_GHES_MEM_CPER_LENGTH), fru_id, fru_text, 0);
+
+ /* Build the memory section CPER for above new generic error data entry */
+ acpi_ghes_build_append_mem_cper(block, error_physical_addr);
+
+ /* Write back above this new generic error data entry to guest memory */
+ cpu_physical_memory_write(error_block_address + current_block_length,
+ block->data + data_length, block->len - data_length);
+
+ g_array_free(block, true);
+
+ return ACPI_GHES_CPER_OK;
+}
+
/*
* Hardware Error Notification
* ACPI 4.0: 17.3.2.7 Hardware Error Notification
@@ -265,3 +471,94 @@ void acpi_ghes_add_fw_cfg(FWCfgState *s, GArray *hardware_error)
fw_cfg_add_file_callback(s, ACPI_GHES_DATA_ADDR_FW_CFG_FILE, NULL, NULL,
NULL, &ges.ghes_addr_le, sizeof(ges.ghes_addr_le), false);
}
+
+bool acpi_ghes_record_errors(uint32_t notify, uint64_t physical_address)
+{
+ uint64_t error_block_addr, read_ack_register_addr, read_ack_register = 0;
+ int loop = 0;
+ uint64_t start_addr = le64_to_cpu(ges.ghes_addr_le);
+ bool ret = ACPI_GHES_CPER_FAIL;
+ uint8_t source_id;
+ const uint8_t error_source_id[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0xff, 0, 0xff, 0xff, 0xff};
+
+ /*
+ * | +---------------------+ ges.ghes_addr_le
+ * | |error_block_address0 |
+ * | +---------------------+ --+--
+ * | | ............. | ACPI_GHES_ADDRESS_SIZE
+ * | +---------------------+ --+--
+ * | |error_block_addressN |
+ * | +---------------------+
+ * | | read_ack_register0 |
+ * | +---------------------+ --+--
+ * | | ............. | ACPI_GHES_ADDRESS_SIZE
+ * | +---------------------+ --+--
+ * | | read_ack_registerN |
+ * | +---------------------+ --+--
+ * | | CPER | |
+ * | | .... | ACPI_GHES_MAX_RAW_DATA_LENGT
+ * | | CPER | |
+ * | +---------------------+ --+--
+ * | | .......... |
+ * | +---------------------+
+ * | | CPER |
+ * | | .... |
+ * | | CPER |
+ * | +---------------------+
+ */
+ if (physical_address && notify < ACPI_GHES_NOTIFY_RESERVED) {
+ /* Find and check the source id for this new CPER */
+ source_id = error_source_id[notify];
+ if (source_id != 0xff) {
+ start_addr += source_id * ACPI_GHES_ADDRESS_SIZE;
+ } else {
+ goto out;
+ }
+
+ cpu_physical_memory_read(start_addr, &error_block_addr,
+ ACPI_GHES_ADDRESS_SIZE);
+
+ read_ack_register_addr = start_addr +
+ ACPI_GHES_ERROR_SOURCE_COUNT * ACPI_GHES_ADDRESS_SIZE;
+retry:
+ cpu_physical_memory_read(read_ack_register_addr,
+ &read_ack_register, ACPI_GHES_ADDRESS_SIZE);
+
+ /* zero means OSPM does not acknowledge the error */
+ if (!read_ack_register) {
+ if (loop < 3) {
+ usleep(100 * 1000);
+ loop++;
+ goto retry;
+ } else {
+ error_report("OSPM does not acknowledge previous error,"
+ " so can not record CPER for current error, forcibly"
+ " acknowledge previous error to avoid blocking next time"
+ " CPER record! Exit");
+ read_ack_register = 1;
+ cpu_physical_memory_write(read_ack_register_addr,
+ &read_ack_register, ACPI_GHES_ADDRESS_SIZE);
+ }
+ } else {
+ if (error_block_addr) {
+ read_ack_register = 0;
+ /*
+ * Clear the Read Ack Register, OSPM will write it to 1 when
+ * acknowledge this error.
+ */
+ cpu_physical_memory_write(read_ack_register_addr,
+ &read_ack_register, ACPI_GHES_ADDRESS_SIZE);
+ ret = acpi_ghes_record_mem_error(error_block_addr,
+ physical_address, acpi_ghes_data_length[source_id]);
+ if (ret == ACPI_GHES_CPER_OK) {
+ acpi_ghes_data_length[source_id] +=
+ (ACPI_GHES_DATA_LENGTH + ACPI_GHES_MEM_CPER_LENGTH);
+ }
+ }
+ }
+ }
+
+out:
+ return ret;
+}
diff --git a/include/hw/acpi/acpi_ghes.h b/include/hw/acpi/acpi_ghes.h
index cb62ec9c7b..8e3c5b879e 100644
--- a/include/hw/acpi/acpi_ghes.h
+++ b/include/hw/acpi/acpi_ghes.h
@@ -24,6 +24,9 @@
#include "hw/acpi/bios-linker-loader.h"
+#define ACPI_GHES_CPER_OK 1
+#define ACPI_GHES_CPER_FAIL 0
+
/*
* Values for Hardware Error Notification Type field
*/
@@ -53,4 +56,5 @@ void acpi_ghes_build_hest(GArray *table_data, GArray *hardware_error,
void acpi_ghes_build_error_table(GArray *hardware_errors, BIOSLinker *linker);
void acpi_ghes_add_fw_cfg(FWCfgState *s, GArray *hardware_errors);
+bool acpi_ghes_record_errors(uint32_t notify, uint64_t error_physical_addr);
#endif
diff --git a/include/sysemu/kvm.h b/include/sysemu/kvm.h
index 9d143282bc..321ead8115 100644
--- a/include/sysemu/kvm.h
+++ b/include/sysemu/kvm.h
@@ -378,8 +378,7 @@ bool kvm_vcpu_id_is_valid(int vcpu_id);
/* Returns VCPU ID to be used on KVM_CREATE_VCPU ioctl() */
unsigned long kvm_arch_vcpu_id(CPUState *cpu);
-#ifdef TARGET_I386
-#define KVM_HAVE_MCE_INJECTION 1
+#ifdef KVM_HAVE_MCE_INJECTION
void kvm_arch_on_sigbus_vcpu(CPUState *cpu, int code, void *addr);
#endif
diff --git a/target/arm/cpu.h b/target/arm/cpu.h
index d844ea21d8..c4fe6ccc63 100644
--- a/target/arm/cpu.h
+++ b/target/arm/cpu.h
@@ -28,6 +28,10 @@
/* ARM processors have a weak memory model */
#define TCG_GUEST_DEFAULT_MO (0)
+#ifdef TARGET_AARCH64
+#define KVM_HAVE_MCE_INJECTION 1
+#endif
+
#define EXCP_UDEF 1 /* undefined instruction */
#define EXCP_SWI 2 /* software interrupt */
#define EXCP_PREFETCH_ABORT 3
diff --git a/target/arm/helper.c b/target/arm/helper.c
index 63815fc4cf..a9ce97efb1 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -3005,7 +3005,7 @@ static uint64_t do_ats_write(CPUARMState *env, uint64_t value,
* Report exception with ESR indicating a fault due to a
* translation table walk for a cache maintenance instruction.
*/
- syn = syn_data_abort_no_iss(current_el == target_el,
+ syn = syn_data_abort_no_iss(current_el == target_el, 0,
fi.ea, 1, fi.s1ptw, 1, fsc);
env->exception.vaddress = value;
env->exception.fsr = fsr;
diff --git a/target/arm/internals.h b/target/arm/internals.h
index f5313dd3d4..28b8451d6d 100644
--- a/target/arm/internals.h
+++ b/target/arm/internals.h
@@ -451,13 +451,14 @@ static inline uint32_t syn_insn_abort(int same_el, int ea, int s1ptw, int fsc)
| ARM_EL_IL | (ea << 9) | (s1ptw << 7) | fsc;
}
-static inline uint32_t syn_data_abort_no_iss(int same_el,
+static inline uint32_t syn_data_abort_no_iss(int same_el, int fnv,
int ea, int cm, int s1ptw,
int wnr, int fsc)
{
return (EC_DATAABORT << ARM_EL_EC_SHIFT) | (same_el << ARM_EL_EC_SHIFT)
| ARM_EL_IL
- | (ea << 9) | (cm << 8) | (s1ptw << 7) | (wnr << 6) | fsc;
+ | (fnv << 10) | (ea << 9) | (cm << 8) | (s1ptw << 7)
+ | (wnr << 6) | fsc;
}
static inline uint32_t syn_data_abort_with_iss(int same_el,
diff --git a/target/arm/kvm64.c b/target/arm/kvm64.c
index 28f6db57d5..c7b7653d3f 100644
--- a/target/arm/kvm64.c
+++ b/target/arm/kvm64.c
@@ -28,6 +28,8 @@
#include "kvm_arm.h"
#include "hw/boards.h"
#include "internals.h"
+#include "hw/acpi/acpi.h"
+#include "hw/acpi/acpi_ghes.h"
static bool have_guest_debug;
@@ -710,6 +712,30 @@ int kvm_arm_cpreg_level(uint64_t regidx)
return KVM_PUT_RUNTIME_STATE;
}
+/* Callers must hold the iothread mutex lock */
+static void kvm_inject_arm_sea(CPUState *c)
+{
+ ARMCPU *cpu = ARM_CPU(c);
+ CPUARMState *env = &cpu->env;
+ CPUClass *cc = CPU_GET_CLASS(c);
+ uint32_t esr;
+ bool same_el;
+
+ c->exception_index = EXCP_DATA_ABORT;
+ env->exception.target_el = 1;
+
+ /*
+ * Set the DFSC to synchronous external abort and set FnV to not valid,
+ * this will tell guest the FAR_ELx is UNKNOWN for this abort.
+ */
+ same_el = arm_current_el(env) == env->exception.target_el;
+ esr = syn_data_abort_no_iss(same_el, 1, 0, 0, 0, 0, 0x10);
+
+ env->exception.syndrome = esr;
+
+ cc->do_interrupt(c);
+}
+
#define AARCH64_CORE_REG(x) (KVM_REG_ARM64 | KVM_REG_SIZE_U64 | \
KVM_REG_ARM_CORE | KVM_REG_ARM_CORE_REG(x))
@@ -1036,6 +1062,44 @@ int kvm_arch_get_registers(CPUState *cs)
return ret;
}
+void kvm_arch_on_sigbus_vcpu(CPUState *c, int code, void *addr)
+{
+ ram_addr_t ram_addr;
+ hwaddr paddr;
+
+ assert(code == BUS_MCEERR_AR || code == BUS_MCEERR_AO);
+
+ if (acpi_enabled && addr &&
+ object_property_get_bool(qdev_get_machine(), "ras", NULL)) {
+ ram_addr = qemu_ram_addr_from_host(addr);
+ if (ram_addr != RAM_ADDR_INVALID &&
+ kvm_physical_memory_addr_from_host(c->kvm_state, addr, &paddr)) {
+ kvm_hwpoison_page_add(ram_addr);
+ /*
+ * Asynchronous signal will be masked by main thread, so
+ * only handle synchronous signal.
+ */
+ if (code == BUS_MCEERR_AR) {
+ kvm_cpu_synchronize_state(c);
+ if (ACPI_GHES_CPER_FAIL !=
+ acpi_ghes_record_errors(ACPI_GHES_NOTIFY_SEA, paddr)) {
+ kvm_inject_arm_sea(c);
+ } else {
+ fprintf(stderr, "failed to record the error\n");
+ }
+ }
+ return;
+ }
+ fprintf(stderr, "Hardware memory error for memory used by "
+ "QEMU itself instead of guest system!\n");
+ }
+
+ if (code == BUS_MCEERR_AR) {
+ fprintf(stderr, "Hardware memory error!\n");
+ exit(1);
+ }
+}
+
/* C6.6.29 BRK instruction */
static const uint32_t brk_insn = 0xd4200000;
diff --git a/target/arm/tlb_helper.c b/target/arm/tlb_helper.c
index 5feb312941..499672ebbc 100644
--- a/target/arm/tlb_helper.c
+++ b/target/arm/tlb_helper.c
@@ -33,7 +33,7 @@ static inline uint32_t merge_syn_data_abort(uint32_t template_syn,
* ISV field.
*/
if (!(template_syn & ARM_EL_ISV) || target_el != 2 || s1ptw) {
- syn = syn_data_abort_no_iss(same_el,
+ syn = syn_data_abort_no_iss(same_el, 0,
ea, 0, s1ptw, is_write, fsc);
} else {
/*
diff --git a/target/i386/cpu.h b/target/i386/cpu.h
index 5352c9ff55..f75a210f96 100644
--- a/target/i386/cpu.h
+++ b/target/i386/cpu.h
@@ -29,6 +29,8 @@
/* The x86 has a strong memory model with some store-after-load re-ordering */
#define TCG_GUEST_DEFAULT_MO (TCG_MO_ALL & ~TCG_MO_ST_LD)
+#define KVM_HAVE_MCE_INJECTION 1
+
/* Maximum instruction code size */
#define TARGET_MAX_INSN_SIZE 16
--
2.19.1
