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-rw-r--r--arch/x86/kernel/cpu/amd.c44
-rw-r--r--arch/x86/kernel/cpu/bugs.c136
-rw-r--r--arch/x86/kernel/cpu/common.c14
-rw-r--r--arch/x86/kernel/cpu/microcode/amd_shas.c112
-rw-r--r--arch/x86/kernel/cpu/scattered.c2
-rw-r--r--arch/x86/kernel/process.c16
6 files changed, 313 insertions, 11 deletions
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index 655f44f89ded..b750ac008b78 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -377,6 +377,47 @@ static void bsp_determine_snp(struct cpuinfo_x86 *c)
#endif
}
+#define ZEN_MODEL_STEP_UCODE(fam, model, step, ucode) \
+ X86_MATCH_VFM_STEPS(VFM_MAKE(X86_VENDOR_AMD, fam, model), \
+ step, step, ucode)
+
+static const struct x86_cpu_id amd_tsa_microcode[] = {
+ ZEN_MODEL_STEP_UCODE(0x19, 0x01, 0x1, 0x0a0011d7),
+ ZEN_MODEL_STEP_UCODE(0x19, 0x01, 0x2, 0x0a00123b),
+ ZEN_MODEL_STEP_UCODE(0x19, 0x08, 0x2, 0x0a00820d),
+ ZEN_MODEL_STEP_UCODE(0x19, 0x11, 0x1, 0x0a10114c),
+ ZEN_MODEL_STEP_UCODE(0x19, 0x11, 0x2, 0x0a10124c),
+ ZEN_MODEL_STEP_UCODE(0x19, 0x18, 0x1, 0x0a108109),
+ ZEN_MODEL_STEP_UCODE(0x19, 0x21, 0x0, 0x0a20102e),
+ ZEN_MODEL_STEP_UCODE(0x19, 0x21, 0x2, 0x0a201211),
+ ZEN_MODEL_STEP_UCODE(0x19, 0x44, 0x1, 0x0a404108),
+ ZEN_MODEL_STEP_UCODE(0x19, 0x50, 0x0, 0x0a500012),
+ ZEN_MODEL_STEP_UCODE(0x19, 0x61, 0x2, 0x0a60120a),
+ ZEN_MODEL_STEP_UCODE(0x19, 0x74, 0x1, 0x0a704108),
+ ZEN_MODEL_STEP_UCODE(0x19, 0x75, 0x2, 0x0a705208),
+ ZEN_MODEL_STEP_UCODE(0x19, 0x78, 0x0, 0x0a708008),
+ ZEN_MODEL_STEP_UCODE(0x19, 0x7c, 0x0, 0x0a70c008),
+ ZEN_MODEL_STEP_UCODE(0x19, 0xa0, 0x2, 0x0aa00216),
+ {},
+};
+
+static void tsa_init(struct cpuinfo_x86 *c)
+{
+ if (cpu_has(c, X86_FEATURE_HYPERVISOR))
+ return;
+
+ if (cpu_has(c, X86_FEATURE_ZEN3) ||
+ cpu_has(c, X86_FEATURE_ZEN4)) {
+ if (x86_match_min_microcode_rev(amd_tsa_microcode))
+ setup_force_cpu_cap(X86_FEATURE_VERW_CLEAR);
+ else
+ pr_debug("%s: current revision: 0x%x\n", __func__, c->microcode);
+ } else {
+ setup_force_cpu_cap(X86_FEATURE_TSA_SQ_NO);
+ setup_force_cpu_cap(X86_FEATURE_TSA_L1_NO);
+ }
+}
+
static void bsp_init_amd(struct cpuinfo_x86 *c)
{
if (cpu_has(c, X86_FEATURE_CONSTANT_TSC)) {
@@ -489,6 +530,9 @@ static void bsp_init_amd(struct cpuinfo_x86 *c)
}
bsp_determine_snp(c);
+
+ tsa_init(c);
+
return;
warn:
diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c
index 7f94e6a5497d..f4d3abb12317 100644
--- a/arch/x86/kernel/cpu/bugs.c
+++ b/arch/x86/kernel/cpu/bugs.c
@@ -94,6 +94,8 @@ static void __init bhi_apply_mitigation(void);
static void __init its_select_mitigation(void);
static void __init its_update_mitigation(void);
static void __init its_apply_mitigation(void);
+static void __init tsa_select_mitigation(void);
+static void __init tsa_apply_mitigation(void);
/* The base value of the SPEC_CTRL MSR without task-specific bits set */
u64 x86_spec_ctrl_base;
@@ -169,9 +171,9 @@ DEFINE_STATIC_KEY_FALSE(switch_mm_always_ibpb);
DEFINE_STATIC_KEY_FALSE(switch_vcpu_ibpb);
EXPORT_SYMBOL_GPL(switch_vcpu_ibpb);
-/* Control MDS CPU buffer clear before idling (halt, mwait) */
-DEFINE_STATIC_KEY_FALSE(mds_idle_clear);
-EXPORT_SYMBOL_GPL(mds_idle_clear);
+/* Control CPU buffer clear before idling (halt, mwait) */
+DEFINE_STATIC_KEY_FALSE(cpu_buf_idle_clear);
+EXPORT_SYMBOL_GPL(cpu_buf_idle_clear);
/*
* Controls whether l1d flush based mitigations are enabled,
@@ -225,6 +227,7 @@ void __init cpu_select_mitigations(void)
gds_select_mitigation();
its_select_mitigation();
bhi_select_mitigation();
+ tsa_select_mitigation();
/*
* After mitigations are selected, some may need to update their
@@ -272,6 +275,7 @@ void __init cpu_select_mitigations(void)
gds_apply_mitigation();
its_apply_mitigation();
bhi_apply_mitigation();
+ tsa_apply_mitigation();
}
/*
@@ -637,7 +641,7 @@ static void __init mmio_apply_mitigation(void)
* is required irrespective of SMT state.
*/
if (!(x86_arch_cap_msr & ARCH_CAP_FBSDP_NO))
- static_branch_enable(&mds_idle_clear);
+ static_branch_enable(&cpu_buf_idle_clear);
if (mmio_nosmt || cpu_mitigations_auto_nosmt())
cpu_smt_disable(false);
@@ -1488,6 +1492,94 @@ static void __init its_apply_mitigation(void)
}
#undef pr_fmt
+#define pr_fmt(fmt) "Transient Scheduler Attacks: " fmt
+
+enum tsa_mitigations {
+ TSA_MITIGATION_NONE,
+ TSA_MITIGATION_AUTO,
+ TSA_MITIGATION_UCODE_NEEDED,
+ TSA_MITIGATION_USER_KERNEL,
+ TSA_MITIGATION_VM,
+ TSA_MITIGATION_FULL,
+};
+
+static const char * const tsa_strings[] = {
+ [TSA_MITIGATION_NONE] = "Vulnerable",
+ [TSA_MITIGATION_UCODE_NEEDED] = "Vulnerable: No microcode",
+ [TSA_MITIGATION_USER_KERNEL] = "Mitigation: Clear CPU buffers: user/kernel boundary",
+ [TSA_MITIGATION_VM] = "Mitigation: Clear CPU buffers: VM",
+ [TSA_MITIGATION_FULL] = "Mitigation: Clear CPU buffers",
+};
+
+static enum tsa_mitigations tsa_mitigation __ro_after_init =
+ IS_ENABLED(CONFIG_MITIGATION_TSA) ? TSA_MITIGATION_AUTO : TSA_MITIGATION_NONE;
+
+static int __init tsa_parse_cmdline(char *str)
+{
+ if (!str)
+ return -EINVAL;
+
+ if (!strcmp(str, "off"))
+ tsa_mitigation = TSA_MITIGATION_NONE;
+ else if (!strcmp(str, "on"))
+ tsa_mitigation = TSA_MITIGATION_FULL;
+ else if (!strcmp(str, "user"))
+ tsa_mitigation = TSA_MITIGATION_USER_KERNEL;
+ else if (!strcmp(str, "vm"))
+ tsa_mitigation = TSA_MITIGATION_VM;
+ else
+ pr_err("Ignoring unknown tsa=%s option.\n", str);
+
+ return 0;
+}
+early_param("tsa", tsa_parse_cmdline);
+
+static void __init tsa_select_mitigation(void)
+{
+ if (cpu_mitigations_off() || !boot_cpu_has_bug(X86_BUG_TSA)) {
+ tsa_mitigation = TSA_MITIGATION_NONE;
+ return;
+ }
+
+ if (tsa_mitigation == TSA_MITIGATION_NONE)
+ return;
+
+ if (!boot_cpu_has(X86_FEATURE_VERW_CLEAR)) {
+ tsa_mitigation = TSA_MITIGATION_UCODE_NEEDED;
+ goto out;
+ }
+
+ if (tsa_mitigation == TSA_MITIGATION_AUTO)
+ tsa_mitigation = TSA_MITIGATION_FULL;
+
+ /*
+ * No need to set verw_clear_cpu_buf_mitigation_selected - it
+ * doesn't fit all cases here and it is not needed because this
+ * is the only VERW-based mitigation on AMD.
+ */
+out:
+ pr_info("%s\n", tsa_strings[tsa_mitigation]);
+}
+
+static void __init tsa_apply_mitigation(void)
+{
+ switch (tsa_mitigation) {
+ case TSA_MITIGATION_USER_KERNEL:
+ setup_force_cpu_cap(X86_FEATURE_CLEAR_CPU_BUF);
+ break;
+ case TSA_MITIGATION_VM:
+ setup_force_cpu_cap(X86_FEATURE_CLEAR_CPU_BUF_VM);
+ break;
+ case TSA_MITIGATION_FULL:
+ setup_force_cpu_cap(X86_FEATURE_CLEAR_CPU_BUF);
+ setup_force_cpu_cap(X86_FEATURE_CLEAR_CPU_BUF_VM);
+ break;
+ default:
+ break;
+ }
+}
+
+#undef pr_fmt
#define pr_fmt(fmt) "Spectre V2 : " fmt
static enum spectre_v2_user_mitigation spectre_v2_user_stibp __ro_after_init =
@@ -2249,10 +2341,10 @@ static void update_mds_branch_idle(void)
return;
if (sched_smt_active()) {
- static_branch_enable(&mds_idle_clear);
+ static_branch_enable(&cpu_buf_idle_clear);
} else if (mmio_mitigation == MMIO_MITIGATION_OFF ||
(x86_arch_cap_msr & ARCH_CAP_FBSDP_NO)) {
- static_branch_disable(&mds_idle_clear);
+ static_branch_disable(&cpu_buf_idle_clear);
}
}
@@ -2316,6 +2408,25 @@ void cpu_bugs_smt_update(void)
break;
}
+ switch (tsa_mitigation) {
+ case TSA_MITIGATION_USER_KERNEL:
+ case TSA_MITIGATION_VM:
+ case TSA_MITIGATION_AUTO:
+ case TSA_MITIGATION_FULL:
+ /*
+ * TSA-SQ can potentially lead to info leakage between
+ * SMT threads.
+ */
+ if (sched_smt_active())
+ static_branch_enable(&cpu_buf_idle_clear);
+ else
+ static_branch_disable(&cpu_buf_idle_clear);
+ break;
+ case TSA_MITIGATION_NONE:
+ case TSA_MITIGATION_UCODE_NEEDED:
+ break;
+ }
+
mutex_unlock(&spec_ctrl_mutex);
}
@@ -3265,6 +3376,11 @@ static ssize_t gds_show_state(char *buf)
return sysfs_emit(buf, "%s\n", gds_strings[gds_mitigation]);
}
+static ssize_t tsa_show_state(char *buf)
+{
+ return sysfs_emit(buf, "%s\n", tsa_strings[tsa_mitigation]);
+}
+
static ssize_t cpu_show_common(struct device *dev, struct device_attribute *attr,
char *buf, unsigned int bug)
{
@@ -3328,6 +3444,9 @@ static ssize_t cpu_show_common(struct device *dev, struct device_attribute *attr
case X86_BUG_ITS:
return its_show_state(buf);
+ case X86_BUG_TSA:
+ return tsa_show_state(buf);
+
default:
break;
}
@@ -3414,6 +3533,11 @@ ssize_t cpu_show_indirect_target_selection(struct device *dev, struct device_att
{
return cpu_show_common(dev, attr, buf, X86_BUG_ITS);
}
+
+ssize_t cpu_show_tsa(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ return cpu_show_common(dev, attr, buf, X86_BUG_TSA);
+}
#endif
void __warn_thunk(void)
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index 27125e009847..fb50c1dd53ef 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -1233,6 +1233,8 @@ static const __initconst struct x86_cpu_id cpu_vuln_whitelist[] = {
#define ITS BIT(8)
/* CPU is affected by Indirect Target Selection, but guest-host isolation is not affected */
#define ITS_NATIVE_ONLY BIT(9)
+/* CPU is affected by Transient Scheduler Attacks */
+#define TSA BIT(10)
static const struct x86_cpu_id cpu_vuln_blacklist[] __initconst = {
VULNBL_INTEL_STEPS(INTEL_IVYBRIDGE, X86_STEP_MAX, SRBDS),
@@ -1280,7 +1282,7 @@ static const struct x86_cpu_id cpu_vuln_blacklist[] __initconst = {
VULNBL_AMD(0x16, RETBLEED),
VULNBL_AMD(0x17, RETBLEED | SMT_RSB | SRSO),
VULNBL_HYGON(0x18, RETBLEED | SMT_RSB | SRSO),
- VULNBL_AMD(0x19, SRSO),
+ VULNBL_AMD(0x19, SRSO | TSA),
VULNBL_AMD(0x1a, SRSO),
{}
};
@@ -1530,6 +1532,16 @@ static void __init cpu_set_bug_bits(struct cpuinfo_x86 *c)
setup_force_cpu_bug(X86_BUG_ITS_NATIVE_ONLY);
}
+ if (c->x86_vendor == X86_VENDOR_AMD) {
+ if (!cpu_has(c, X86_FEATURE_TSA_SQ_NO) ||
+ !cpu_has(c, X86_FEATURE_TSA_L1_NO)) {
+ if (cpu_matches(cpu_vuln_blacklist, TSA) ||
+ /* Enable bug on Zen guests to allow for live migration. */
+ (cpu_has(c, X86_FEATURE_HYPERVISOR) && cpu_has(c, X86_FEATURE_ZEN)))
+ setup_force_cpu_bug(X86_BUG_TSA);
+ }
+ }
+
if (cpu_matches(cpu_vuln_whitelist, NO_MELTDOWN))
return;
diff --git a/arch/x86/kernel/cpu/microcode/amd_shas.c b/arch/x86/kernel/cpu/microcode/amd_shas.c
index 2a1655b1fdd8..1fd349cfc802 100644
--- a/arch/x86/kernel/cpu/microcode/amd_shas.c
+++ b/arch/x86/kernel/cpu/microcode/amd_shas.c
@@ -231,6 +231,13 @@ static const struct patch_digest phashes[] = {
0x0d,0x5b,0x65,0x34,0x69,0xb2,0x62,0x21,
}
},
+ { 0xa0011d7, {
+ 0x35,0x07,0xcd,0x40,0x94,0xbc,0x81,0x6b,
+ 0xfc,0x61,0x56,0x1a,0xe2,0xdb,0x96,0x12,
+ 0x1c,0x1c,0x31,0xb1,0x02,0x6f,0xe5,0xd2,
+ 0xfe,0x1b,0x04,0x03,0x2c,0x8f,0x4c,0x36,
+ }
+ },
{ 0xa001223, {
0xfb,0x32,0x5f,0xc6,0x83,0x4f,0x8c,0xb8,
0xa4,0x05,0xf9,0x71,0x53,0x01,0x16,0xc4,
@@ -294,6 +301,13 @@ static const struct patch_digest phashes[] = {
0xc0,0xcd,0x33,0xf2,0x8d,0xf9,0xef,0x59,
}
},
+ { 0xa00123b, {
+ 0xef,0xa1,0x1e,0x71,0xf1,0xc3,0x2c,0xe2,
+ 0xc3,0xef,0x69,0x41,0x7a,0x54,0xca,0xc3,
+ 0x8f,0x62,0x84,0xee,0xc2,0x39,0xd9,0x28,
+ 0x95,0xa7,0x12,0x49,0x1e,0x30,0x71,0x72,
+ }
+ },
{ 0xa00820c, {
0xa8,0x0c,0x81,0xc0,0xa6,0x00,0xe7,0xf3,
0x5f,0x65,0xd3,0xb9,0x6f,0xea,0x93,0x63,
@@ -301,6 +315,13 @@ static const struct patch_digest phashes[] = {
0xe1,0x3b,0x8d,0xb2,0xf8,0x22,0x03,0xe2,
}
},
+ { 0xa00820d, {
+ 0xf9,0x2a,0xc0,0xf4,0x9e,0xa4,0x87,0xa4,
+ 0x7d,0x87,0x00,0xfd,0xab,0xda,0x19,0xca,
+ 0x26,0x51,0x32,0xc1,0x57,0x91,0xdf,0xc1,
+ 0x05,0xeb,0x01,0x7c,0x5a,0x95,0x21,0xb7,
+ }
+ },
{ 0xa10113e, {
0x05,0x3c,0x66,0xd7,0xa9,0x5a,0x33,0x10,
0x1b,0xf8,0x9c,0x8f,0xed,0xfc,0xa7,0xa0,
@@ -322,6 +343,13 @@ static const struct patch_digest phashes[] = {
0xf1,0x5e,0xb0,0xde,0xb4,0x98,0xae,0xc4,
}
},
+ { 0xa10114c, {
+ 0x9e,0xb6,0xa2,0xd9,0x87,0x38,0xc5,0x64,
+ 0xd8,0x88,0xfa,0x78,0x98,0xf9,0x6f,0x74,
+ 0x39,0x90,0x1b,0xa5,0xcf,0x5e,0xb4,0x2a,
+ 0x02,0xff,0xd4,0x8c,0x71,0x8b,0xe2,0xc0,
+ }
+ },
{ 0xa10123e, {
0x03,0xb9,0x2c,0x76,0x48,0x93,0xc9,0x18,
0xfb,0x56,0xfd,0xf7,0xe2,0x1d,0xca,0x4d,
@@ -343,6 +371,13 @@ static const struct patch_digest phashes[] = {
0x1b,0x7d,0x64,0x9d,0x4b,0x53,0x13,0x75,
}
},
+ { 0xa10124c, {
+ 0x29,0xea,0xf1,0x2c,0xb2,0xe4,0xef,0x90,
+ 0xa4,0xcd,0x1d,0x86,0x97,0x17,0x61,0x46,
+ 0xfc,0x22,0xcb,0x57,0x75,0x19,0xc8,0xcc,
+ 0x0c,0xf5,0xbc,0xac,0x81,0x9d,0x9a,0xd2,
+ }
+ },
{ 0xa108108, {
0xed,0xc2,0xec,0xa1,0x15,0xc6,0x65,0xe9,
0xd0,0xef,0x39,0xaa,0x7f,0x55,0x06,0xc6,
@@ -350,6 +385,13 @@ static const struct patch_digest phashes[] = {
0x28,0x1e,0x9c,0x59,0x69,0x99,0x4d,0x16,
}
},
+ { 0xa108109, {
+ 0x85,0xb4,0xbd,0x7c,0x49,0xa7,0xbd,0xfa,
+ 0x49,0x36,0x80,0x81,0xc5,0xb7,0x39,0x1b,
+ 0x9a,0xaa,0x50,0xde,0x9b,0xe9,0x32,0x35,
+ 0x42,0x7e,0x51,0x4f,0x52,0x2c,0x28,0x59,
+ }
+ },
{ 0xa20102d, {
0xf9,0x6e,0xf2,0x32,0xd3,0x0f,0x5f,0x11,
0x59,0xa1,0xfe,0xcc,0xcd,0x9b,0x42,0x89,
@@ -357,6 +399,13 @@ static const struct patch_digest phashes[] = {
0x8c,0xe9,0x19,0x3e,0xcc,0x3f,0x7b,0xb4,
}
},
+ { 0xa20102e, {
+ 0xbe,0x1f,0x32,0x04,0x0d,0x3c,0x9c,0xdd,
+ 0xe1,0xa4,0xbf,0x76,0x3a,0xec,0xc2,0xf6,
+ 0x11,0x00,0xa7,0xaf,0x0f,0xe5,0x02,0xc5,
+ 0x54,0x3a,0x1f,0x8c,0x16,0xb5,0xff,0xbe,
+ }
+ },
{ 0xa201210, {
0xe8,0x6d,0x51,0x6a,0x8e,0x72,0xf3,0xfe,
0x6e,0x16,0xbc,0x62,0x59,0x40,0x17,0xe9,
@@ -364,6 +413,13 @@ static const struct patch_digest phashes[] = {
0xf7,0x55,0xf0,0x13,0xbb,0x22,0xf6,0x41,
}
},
+ { 0xa201211, {
+ 0x69,0xa1,0x17,0xec,0xd0,0xf6,0x6c,0x95,
+ 0xe2,0x1e,0xc5,0x59,0x1a,0x52,0x0a,0x27,
+ 0xc4,0xed,0xd5,0x59,0x1f,0xbf,0x00,0xff,
+ 0x08,0x88,0xb5,0xe1,0x12,0xb6,0xcc,0x27,
+ }
+ },
{ 0xa404107, {
0xbb,0x04,0x4e,0x47,0xdd,0x5e,0x26,0x45,
0x1a,0xc9,0x56,0x24,0xa4,0x4c,0x82,0xb0,
@@ -371,6 +427,13 @@ static const struct patch_digest phashes[] = {
0x13,0xbc,0xc5,0x25,0xe4,0xc5,0xc3,0x99,
}
},
+ { 0xa404108, {
+ 0x69,0x67,0x43,0x06,0xf8,0x0c,0x62,0xdc,
+ 0xa4,0x21,0x30,0x4f,0x0f,0x21,0x2c,0xcb,
+ 0xcc,0x37,0xf1,0x1c,0xc3,0xf8,0x2f,0x19,
+ 0xdf,0x53,0x53,0x46,0xb1,0x15,0xea,0x00,
+ }
+ },
{ 0xa500011, {
0x23,0x3d,0x70,0x7d,0x03,0xc3,0xc4,0xf4,
0x2b,0x82,0xc6,0x05,0xda,0x80,0x0a,0xf1,
@@ -378,6 +441,13 @@ static const struct patch_digest phashes[] = {
0x11,0x5e,0x96,0x7e,0x71,0xe9,0xfc,0x74,
}
},
+ { 0xa500012, {
+ 0xeb,0x74,0x0d,0x47,0xa1,0x8e,0x09,0xe4,
+ 0x93,0x4c,0xad,0x03,0x32,0x4c,0x38,0x16,
+ 0x10,0x39,0xdd,0x06,0xaa,0xce,0xd6,0x0f,
+ 0x62,0x83,0x9d,0x8e,0x64,0x55,0xbe,0x63,
+ }
+ },
{ 0xa601209, {
0x66,0x48,0xd4,0x09,0x05,0xcb,0x29,0x32,
0x66,0xb7,0x9a,0x76,0xcd,0x11,0xf3,0x30,
@@ -385,6 +455,13 @@ static const struct patch_digest phashes[] = {
0xe8,0x73,0xe2,0xd6,0xdb,0xd2,0x77,0x1d,
}
},
+ { 0xa60120a, {
+ 0x0c,0x8b,0x3d,0xfd,0x52,0x52,0x85,0x7d,
+ 0x20,0x3a,0xe1,0x7e,0xa4,0x21,0x3b,0x7b,
+ 0x17,0x86,0xae,0xac,0x13,0xb8,0x63,0x9d,
+ 0x06,0x01,0xd0,0xa0,0x51,0x9a,0x91,0x2c,
+ }
+ },
{ 0xa704107, {
0xf3,0xc6,0x58,0x26,0xee,0xac,0x3f,0xd6,
0xce,0xa1,0x72,0x47,0x3b,0xba,0x2b,0x93,
@@ -392,6 +469,13 @@ static const struct patch_digest phashes[] = {
0x64,0x39,0x71,0x8c,0xce,0xe7,0x41,0x39,
}
},
+ { 0xa704108, {
+ 0xd7,0x55,0x15,0x2b,0xfe,0xc4,0xbc,0x93,
+ 0xec,0x91,0xa0,0xae,0x45,0xb7,0xc3,0x98,
+ 0x4e,0xff,0x61,0x77,0x88,0xc2,0x70,0x49,
+ 0xe0,0x3a,0x1d,0x84,0x38,0x52,0xbf,0x5a,
+ }
+ },
{ 0xa705206, {
0x8d,0xc0,0x76,0xbd,0x58,0x9f,0x8f,0xa4,
0x12,0x9d,0x21,0xfb,0x48,0x21,0xbc,0xe7,
@@ -399,6 +483,13 @@ static const struct patch_digest phashes[] = {
0x03,0x35,0xe9,0xbe,0xfb,0x06,0xdf,0xfc,
}
},
+ { 0xa705208, {
+ 0x30,0x1d,0x55,0x24,0xbc,0x6b,0x5a,0x19,
+ 0x0c,0x7d,0x1d,0x74,0xaa,0xd1,0xeb,0xd2,
+ 0x16,0x62,0xf7,0x5b,0xe1,0x1f,0x18,0x11,
+ 0x5c,0xf0,0x94,0x90,0x26,0xec,0x69,0xff,
+ }
+ },
{ 0xa708007, {
0x6b,0x76,0xcc,0x78,0xc5,0x8a,0xa3,0xe3,
0x32,0x2d,0x79,0xe4,0xc3,0x80,0xdb,0xb2,
@@ -406,6 +497,13 @@ static const struct patch_digest phashes[] = {
0xdf,0x92,0x73,0x84,0x87,0x3c,0x73,0x93,
}
},
+ { 0xa708008, {
+ 0x08,0x6e,0xf0,0x22,0x4b,0x8e,0xc4,0x46,
+ 0x58,0x34,0xe6,0x47,0xa2,0x28,0xfd,0xab,
+ 0x22,0x3d,0xdd,0xd8,0x52,0x9e,0x1d,0x16,
+ 0xfa,0x01,0x68,0x14,0x79,0x3e,0xe8,0x6b,
+ }
+ },
{ 0xa70c005, {
0x88,0x5d,0xfb,0x79,0x64,0xd8,0x46,0x3b,
0x4a,0x83,0x8e,0x77,0x7e,0xcf,0xb3,0x0f,
@@ -413,6 +511,13 @@ static const struct patch_digest phashes[] = {
0xee,0x49,0xac,0xe1,0x8b,0x13,0xc5,0x13,
}
},
+ { 0xa70c008, {
+ 0x0f,0xdb,0x37,0xa1,0x10,0xaf,0xd4,0x21,
+ 0x94,0x0d,0xa4,0xa2,0xe9,0x86,0x6c,0x0e,
+ 0x85,0x7c,0x36,0x30,0xa3,0x3a,0x78,0x66,
+ 0x18,0x10,0x60,0x0d,0x78,0x3d,0x44,0xd0,
+ }
+ },
{ 0xaa00116, {
0xe8,0x4c,0x2c,0x88,0xa1,0xac,0x24,0x63,
0x65,0xe5,0xaa,0x2d,0x16,0xa9,0xc3,0xf5,
@@ -441,4 +546,11 @@ static const struct patch_digest phashes[] = {
0x68,0x2f,0x46,0xee,0xfe,0xc6,0x6d,0xef,
}
},
+ { 0xaa00216, {
+ 0x79,0xfb,0x5b,0x9f,0xb6,0xe6,0xa8,0xf5,
+ 0x4e,0x7c,0x4f,0x8e,0x1d,0xad,0xd0,0x08,
+ 0xc2,0x43,0x7c,0x8b,0xe6,0xdb,0xd0,0xd2,
+ 0xe8,0x39,0x26,0xc1,0xe5,0x5a,0x48,0xf1,
+ }
+ },
};
diff --git a/arch/x86/kernel/cpu/scattered.c b/arch/x86/kernel/cpu/scattered.c
index dbf6d71bdf18..b4a1f6732a3a 100644
--- a/arch/x86/kernel/cpu/scattered.c
+++ b/arch/x86/kernel/cpu/scattered.c
@@ -50,6 +50,8 @@ static const struct cpuid_bit cpuid_bits[] = {
{ X86_FEATURE_MBA, CPUID_EBX, 6, 0x80000008, 0 },
{ X86_FEATURE_SMBA, CPUID_EBX, 2, 0x80000020, 0 },
{ X86_FEATURE_BMEC, CPUID_EBX, 3, 0x80000020, 0 },
+ { X86_FEATURE_TSA_SQ_NO, CPUID_ECX, 1, 0x80000021, 0 },
+ { X86_FEATURE_TSA_L1_NO, CPUID_ECX, 2, 0x80000021, 0 },
{ X86_FEATURE_AMD_WORKLOAD_CLASS, CPUID_EAX, 22, 0x80000021, 0 },
{ X86_FEATURE_PERFMON_V2, CPUID_EAX, 0, 0x80000022, 0 },
{ X86_FEATURE_AMD_LBR_V2, CPUID_EAX, 1, 0x80000022, 0 },
diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index 704883c21f3a..a838be04f874 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -907,16 +907,24 @@ static __init bool prefer_mwait_c1_over_halt(void)
*/
static __cpuidle void mwait_idle(void)
{
+ if (need_resched())
+ return;
+
+ x86_idle_clear_cpu_buffers();
+
if (!current_set_polling_and_test()) {
const void *addr = &current_thread_info()->flags;
alternative_input("", "clflush (%[addr])", X86_BUG_CLFLUSH_MONITOR, [addr] "a" (addr));
__monitor(addr, 0, 0);
- if (!need_resched()) {
- __sti_mwait(0, 0);
- raw_local_irq_disable();
- }
+ if (need_resched())
+ goto out;
+
+ __sti_mwait(0, 0);
+ raw_local_irq_disable();
}
+
+out:
__current_clr_polling();
}
generated by cgit (git 2.34.1) at 2025-07-13 21:19:41 +0000