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authorArnd Bergmann <arnd@arndb.de>2015-06-01 16:09:35 -0600
committerBorislav Petkov <bp@suse.de>2015-06-02 19:07:50 +0200
commit451bb7fbccdc0f5d942227913afa5dea3afd12f7 (patch)
tree0e47457317b2c99328f1eb94c2f1b87c4c9fbadd /drivers/edac/xgene_edac.c
parent2ce39109a5062b06df440fbf2993ce9ab3bf6e08 (diff)
downloadlinux-451bb7fbccdc0f5d942227913afa5dea3afd12f7.tar.bz2
EDAC, xgene: Fix cpuid abuse
The new x-gene EDAC driver incorrectly tried to figure out the version of one of its IP blocks by looking at the version of the CPU core, which is only vagely related. This removes the incorrect code and instead uses the version of the IP block in the compatible string where it belongs. Found using build testing on x86, which does not provide the arm64 cpuid interface. Signed-off-by: Arnd Bergmann <arnd@arndb.de> [ Changed subnode to "apm,xgene-edac-pmd-v2", adjusted check. ] Signed-off-by: Loc Ho <lho@apm.com> Cc: devicetree@vger.kernel.org Cc: dougthompson@xmission.com Cc: ijc+devicetree@hellion.org.uk Cc: jcm@redhat.com Cc: linux-arm-kernel@lists.infradead.org Cc: linux-edac <linux-edac@vger.kernel.org> Cc: mark.rutland@arm.com Cc: mchehab@osg.samsung.com Cc: patches@apm.com Cc: robh+dt@kernel.org Link: http://lkml.kernel.org/r/3195065.IK73o60xya@wuerfel Signed-off-by: Borislav Petkov <bp@suse.de>
Diffstat (limited to 'drivers/edac/xgene_edac.c')
-rw-r--r--drivers/edac/xgene_edac.c55
1 files changed, 8 insertions, 47 deletions
diff --git a/drivers/edac/xgene_edac.c b/drivers/edac/xgene_edac.c
index b5158572f6ab..14636e4b6a08 100644
--- a/drivers/edac/xgene_edac.c
+++ b/drivers/edac/xgene_edac.c
@@ -523,6 +523,7 @@ struct xgene_edac_pmd_ctx {
struct edac_device_ctl_info *edac_dev;
void __iomem *pmd_csr;
u32 pmd;
+ int version;
};
static void xgene_edac_pmd_l1_check(struct edac_device_ctl_info *edac_dev,
@@ -784,50 +785,6 @@ static void xgene_edac_pmd_cpu_hw_cfg(struct edac_device_ctl_info *edac_dev,
writel(0x00000101, pg_f + MEMERR_CPU_MMUECR_PAGE_OFFSET);
}
-static bool xgene_edac_pmd_l2c_version1(void)
-{
- /* Check all chips with PMD L2C version 1 HW */
- #define REVIDR_MINOR_REV(revidr) ((revidr) & 0x00000007)
-
- switch (MIDR_VARIANT(read_cpuid_id())) {
- case 0:
- switch (MIDR_REVISION(read_cpuid_id())) {
- case 0:
-
- switch (REVIDR_MINOR_REV(read_cpuid(REVIDR_EL1))) {
- case 1:
- case 2:
- return true;
- };
- break;
- case 1:
- if (REVIDR_MINOR_REV(read_cpuid(REVIDR_EL1)) == 1)
- return true;
- break;
- }
- break;
- case 1:
- switch (MIDR_REVISION(read_cpuid_id())) {
- case 0:
- switch (REVIDR_MINOR_REV(read_cpuid(REVIDR_EL1))) {
- case 1:
- return true;
- };
- break;
- case 1:
- switch (REVIDR_MINOR_REV(read_cpuid(REVIDR_EL1))) {
- case 1:
- case 0:
- return true;
- };
- break;
- }
- break;
- }
-
- return false;
-}
-
static void xgene_edac_pmd_hw_cfg(struct edac_device_ctl_info *edac_dev)
{
struct xgene_edac_pmd_ctx *ctx = edac_dev->pvt_info;
@@ -837,7 +794,7 @@ static void xgene_edac_pmd_hw_cfg(struct edac_device_ctl_info *edac_dev)
/* Enable PMD memory error - MEMERR_L2C_L2ECR and L2C_L2RTOCR */
writel(0x00000703, pg_e + MEMERR_L2C_L2ECR_PAGE_OFFSET);
/* Configure L2C HW request time out feature if supported */
- if (!xgene_edac_pmd_l2c_version1())
+ if (ctx->version > 1)
writel(0x00000119, pg_d + CPUX_L2C_L2RTOCR_PAGE_OFFSET);
}
@@ -956,7 +913,8 @@ static int xgene_edac_pmd_available(u32 efuse, int pmd)
return (efuse & (1 << pmd)) ? 0 : 1;
}
-static int xgene_edac_pmd_add(struct xgene_edac *edac, struct device_node *np)
+static int xgene_edac_pmd_add(struct xgene_edac *edac, struct device_node *np,
+ int version)
{
struct edac_device_ctl_info *edac_dev;
struct xgene_edac_pmd_ctx *ctx;
@@ -998,6 +956,7 @@ static int xgene_edac_pmd_add(struct xgene_edac *edac, struct device_node *np)
ctx->edac = edac;
ctx->edac_dev = edac_dev;
ctx->ddev = *edac->dev;
+ ctx->version = version;
edac_dev->dev = &ctx->ddev;
edac_dev->ctl_name = ctx->name;
edac_dev->dev_name = ctx->name;
@@ -1169,7 +1128,9 @@ static int xgene_edac_probe(struct platform_device *pdev)
if (of_device_is_compatible(child, "apm,xgene-edac-mc"))
xgene_edac_mc_add(edac, child);
if (of_device_is_compatible(child, "apm,xgene-edac-pmd"))
- xgene_edac_pmd_add(edac, child);
+ xgene_edac_pmd_add(edac, child, 1);
+ if (of_device_is_compatible(child, "apm,xgene-edac-pmd-v2"))
+ xgene_edac_pmd_add(edac, child, 2);
}
return 0;