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Subject[PATCH 09/12] EDAC, MCE: Overhaul error fields extraction macros
Date
From: Borislav Petkov <borislav.petkov@amd.com>

Make macro names shorter thus making code shorter and more clear.

Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
---
drivers/edac/amd64_edac.c | 4 +-
drivers/edac/mce_amd.c | 83 +++++++++++++++++++-------------------------
drivers/edac/mce_amd.h | 10 +++---
3 files changed, 43 insertions(+), 54 deletions(-)
diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c
index 8521401..dfbaa97 100644
--- a/drivers/edac/amd64_edac.c
+++ b/drivers/edac/amd64_edac.c
@@ -2055,8 +2055,8 @@ static void amd64_handle_ue(struct mem_ctl_info *mci,
static inline void __amd64_decode_bus_error(struct mem_ctl_info *mci,
struct err_regs *info)
{
- u32 ec = ERROR_CODE(info->nbsl);
- u32 xec = EXT_ERROR_CODE(info->nbsl);
+ u16 ec = EC(info->nbsl);
+ u8 xec = XEC(info->nbsl, 0x1f);
int ecc_type = (info->nbsh >> 13) & 0x3;

/* Bail early out if this was an 'observed' error */
diff --git a/drivers/edac/mce_amd.c b/drivers/edac/mce_amd.c
index c14abe3..53d4dc0 100644
--- a/drivers/edac/mce_amd.c
+++ b/drivers/edac/mce_amd.c
@@ -133,13 +133,13 @@ static bool f12h_dc_mce(u16 ec, u8 xec)
bool ret = false;

if (MEM_ERROR(ec)) {
- u8 ll = ec & 0x3;
+ u8 ll = LL(ec);
ret = true;

if (ll == LL_L2)
pr_cont("during L1 linefill from L2.\n");
else if (ll == LL_L1)
- pr_cont("Data/Tag %s error.\n", RRRR_MSG(ec));
+ pr_cont("Data/Tag %s error.\n", R4_MSG(ec));
else
ret = false;
}
@@ -148,10 +148,7 @@ static bool f12h_dc_mce(u16 ec, u8 xec)

static bool f10h_dc_mce(u16 ec, u8 xec)
{
- u8 r4 = (ec >> 4) & 0xf;
- u8 ll = ec & 0x3;
-
- if (r4 == R4_GEN && ll == LL_L1) {
+ if (R4(ec) == R4_GEN && LL(ec) == LL_L1) {
pr_cont("during data scrub.\n");
return true;
}
@@ -170,15 +167,12 @@ static bool k8_dc_mce(u16 ec, u8 xec)

static bool f14h_dc_mce(u16 ec, u8 xec)
{
- u8 r4 = (ec >> 4) & 0xf;
- u8 ll = ec & 0x3;
- u8 tt = (ec >> 2) & 0x3;
- u8 ii = tt;
+ u8 r4 = R4(ec);
bool ret = true;

if (MEM_ERROR(ec)) {

- if (tt != TT_DATA || ll != LL_L1)
+ if (TT(ec) != TT_DATA || LL(ec) != LL_L1)
return false;

switch (r4) {
@@ -198,7 +192,7 @@ static bool f14h_dc_mce(u16 ec, u8 xec)
}
} else if (BUS_ERROR(ec)) {

- if ((ii != II_MEM && ii != II_IO) || ll != LL_LG)
+ if ((II(ec) != II_MEM && II(ec) != II_IO) || LL(ec) != LL_LG)
return false;

pr_cont("System read data error on a ");
@@ -273,16 +267,14 @@ static bool f15h_dc_mce(u16 ec, u8 xec)

static void amd_decode_dc_mce(struct mce *m)
{
- u16 ec = m->status & 0xffff;
- u8 xec = (m->status >> 16) & xec_mask;
+ u16 ec = EC(m->status);
+ u8 xec = XEC(m->status, xec_mask);

pr_emerg(HW_ERR "Data Cache Error: ");

/* TLB error signatures are the same across families */
if (TLB_ERROR(ec)) {
- u8 tt = (ec >> 2) & 0x3;
-
- if (tt == TT_DATA) {
+ if (TT(ec) == TT_DATA) {
pr_cont("%s TLB %s.\n", LL_MSG(ec),
((xec == 2) ? "locked miss"
: (xec ? "multimatch" : "parity")));
@@ -296,8 +288,7 @@ static void amd_decode_dc_mce(struct mce *m)

static bool k8_ic_mce(u16 ec, u8 xec)
{
- u8 ll = ec & 0x3;
- u8 r4 = (ec >> 4) & 0xf;
+ u8 ll = LL(ec);
bool ret = true;

if (!MEM_ERROR(ec))
@@ -306,7 +297,7 @@ static bool k8_ic_mce(u16 ec, u8 xec)
if (ll == 0x2)
pr_cont("during a linefill from L2.\n");
else if (ll == 0x1) {
- switch (r4) {
+ switch (R4(ec)) {
case R4_IRD:
pr_cont("Parity error during data load.\n");
break;
@@ -331,13 +322,11 @@ static bool k8_ic_mce(u16 ec, u8 xec)

static bool f14h_ic_mce(u16 ec, u8 xec)
{
- u8 ll = ec & 0x3;
- u8 tt = (ec >> 2) & 0x3;
- u8 r4 = (ec >> 4) & 0xf;
+ u8 r4 = R4(ec);
bool ret = true;

if (MEM_ERROR(ec)) {
- if (tt != 0 || ll != 1)
+ if (TT(ec) != 0 || LL(ec) != 1)
ret = false;

if (r4 == R4_IRD)
@@ -378,8 +367,8 @@ static bool f15h_ic_mce(u16 ec, u8 xec)

static void amd_decode_ic_mce(struct mce *m)
{
- u16 ec = m->status & 0xffff;
- u8 xec = (m->status >> 16) & xec_mask;
+ u16 ec = EC(m->status);
+ u8 xec = XEC(m->status, xec_mask);

pr_emerg(HW_ERR "Instruction Cache Error: ");

@@ -398,8 +387,8 @@ static void amd_decode_ic_mce(struct mce *m)

static void amd_decode_bu_mce(struct mce *m)
{
- u32 ec = m->status & 0xffff;
- u32 xec = (m->status >> 16) & xec_mask;
+ u16 ec = EC(m->status);
+ u8 xec = XEC(m->status, xec_mask);

pr_emerg(HW_ERR "Bus Unit Error");

@@ -408,23 +397,23 @@ static void amd_decode_bu_mce(struct mce *m)
else if (xec == 0x3)
pr_cont(" in the victim data buffers.\n");
else if (xec == 0x2 && MEM_ERROR(ec))
- pr_cont(": %s error in the L2 cache tags.\n", RRRR_MSG(ec));
+ pr_cont(": %s error in the L2 cache tags.\n", R4_MSG(ec));
else if (xec == 0x0) {
if (TLB_ERROR(ec))
pr_cont(": %s error in a Page Descriptor Cache or "
"Guest TLB.\n", TT_MSG(ec));
else if (BUS_ERROR(ec))
pr_cont(": %s/ECC error in data read from NB: %s.\n",
- RRRR_MSG(ec), PP_MSG(ec));
+ R4_MSG(ec), PP_MSG(ec));
else if (MEM_ERROR(ec)) {
- u8 rrrr = (ec >> 4) & 0xf;
+ u8 r4 = R4(ec);

- if (rrrr >= 0x7)
+ if (r4 >= 0x7)
pr_cont(": %s error during data copyback.\n",
- RRRR_MSG(ec));
- else if (rrrr <= 0x1)
+ R4_MSG(ec));
+ else if (r4 <= 0x1)
pr_cont(": %s parity/ECC error during data "
- "access from L2.\n", RRRR_MSG(ec));
+ "access from L2.\n", R4_MSG(ec));
else
goto wrong_bu_mce;
} else
@@ -440,8 +429,8 @@ wrong_bu_mce:

static void amd_decode_cu_mce(struct mce *m)
{
- u16 ec = m->status & 0xffff;
- u8 xec = (m->status >> 16) & xec_mask;
+ u16 ec = EC(m->status);
+ u8 xec = XEC(m->status, xec_mask);

pr_emerg(HW_ERR "Combined Unit Error: ");

@@ -480,8 +469,8 @@ wrong_cu_mce:

static void amd_decode_ls_mce(struct mce *m)
{
- u16 ec = m->status & 0xffff;
- u8 xec = (m->status >> 16) & xec_mask;
+ u16 ec = EC(m->status);
+ u8 xec = XEC(m->status, xec_mask);

if (boot_cpu_data.x86 >= 0x14) {
pr_emerg("You shouldn't be seeing an LS MCE on this cpu family,"
@@ -492,12 +481,12 @@ static void amd_decode_ls_mce(struct mce *m)
pr_emerg(HW_ERR "Load Store Error");

if (xec == 0x0) {
- u8 r4 = (ec >> 4) & 0xf;
+ u8 r4 = R4(ec);

if (!BUS_ERROR(ec) || (r4 != R4_DRD && r4 != R4_DWR))
goto wrong_ls_mce;

- pr_cont(" during %s.\n", RRRR_MSG(ec));
+ pr_cont(" during %s.\n", R4_MSG(ec));
} else
goto wrong_ls_mce;

@@ -605,8 +594,8 @@ static bool nb_noop_mce(u16 ec, u8 xec)

void amd_decode_nb_mce(int node_id, struct mce *m, u32 nbcfg)
{
- u8 xec = (m->status >> 16) & 0x1f;
- u16 ec = m->status & 0xffff;
+ u16 ec = EC(m->status);
+ u8 xec = XEC(m->status, 0x1f);
u32 nbsh = (u32)(m->status >> 32);

pr_emerg(HW_ERR "Northbridge Error, node %d: ", node_id);
@@ -668,7 +657,7 @@ EXPORT_SYMBOL_GPL(amd_decode_nb_mce);
static void amd_decode_fr_mce(struct mce *m)
{
struct cpuinfo_x86 *c = &boot_cpu_data;
- u8 xec = (m->status >> 16) & xec_mask;
+ u8 xec = XEC(m->status, xec_mask);

if (c->x86 == 0xf || c->x86 == 0x11)
goto wrong_fr_mce;
@@ -694,7 +683,7 @@ wrong_fr_mce:

static void amd_decode_fp_mce(struct mce *m)
{
- u8 xec = (m->status >> 16) & xec_mask;
+ u8 xec = XEC(m->status, xec_mask);

pr_emerg(HW_ERR "Floating Point Unit Error: ");

@@ -739,11 +728,11 @@ static inline void amd_decode_err_code(u16 ec)
TT_MSG(ec), LL_MSG(ec));
} else if (MEM_ERROR(ec)) {
pr_emerg(HW_ERR "Transaction: %s, Type: %s, Cache Level: %s\n",
- RRRR_MSG(ec), TT_MSG(ec), LL_MSG(ec));
+ R4_MSG(ec), TT_MSG(ec), LL_MSG(ec));
} else if (BUS_ERROR(ec)) {
pr_emerg(HW_ERR "Transaction: %s (%s), %s, Cache Level: %s, "
"Participating Processor: %s\n",
- RRRR_MSG(ec), II_MSG(ec), TO_MSG(ec), LL_MSG(ec),
+ R4_MSG(ec), II_MSG(ec), TO_MSG(ec), LL_MSG(ec),
PP_MSG(ec));
} else
pr_emerg(HW_ERR "Huh? Unknown MCE error 0x%x\n", ec);
diff --git a/drivers/edac/mce_amd.h b/drivers/edac/mce_amd.h
index 8398847..45dda47 100644
--- a/drivers/edac/mce_amd.h
+++ b/drivers/edac/mce_amd.h
@@ -7,8 +7,8 @@

#define BIT_64(n) (U64_C(1) << (n))

-#define ERROR_CODE(x) ((x) & 0xffff)
-#define EXT_ERROR_CODE(x) (((x) >> 16) & 0x1f)
+#define EC(x) ((x) & 0xffff)
+#define XEC(x, mask) (((x) >> 16) & mask)

#define LOW_SYNDROME(x) (((x) >> 15) & 0xff)
#define HIGH_SYNDROME(x) (((x) >> 24) & 0xff)
@@ -21,15 +21,15 @@
#define TT_MSG(x) tt_msgs[TT(x)]
#define II(x) (((x) >> 2) & 0x3)
#define II_MSG(x) ii_msgs[II(x)]
-#define LL(x) (((x) >> 0) & 0x3)
+#define LL(x) ((x) & 0x3)
#define LL_MSG(x) ll_msgs[LL(x)]
#define TO(x) (((x) >> 8) & 0x1)
#define TO_MSG(x) to_msgs[TO(x)]
#define PP(x) (((x) >> 9) & 0x3)
#define PP_MSG(x) pp_msgs[PP(x)]

-#define RRRR(x) (((x) >> 4) & 0xf)
-#define RRRR_MSG(x) ((RRRR(x) < 9) ? rrrr_msgs[RRRR(x)] : "Wrong R4!")
+#define R4(x) (((x) >> 4) & 0xf)
+#define R4_MSG(x) ((R4(x) < 9) ? rrrr_msgs[R4(x)] : "Wrong R4!")

#define K8_NBSH 0x4C

--
1.7.3.1.50.g1e633


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