linux-kernel - [PATCH 14/21] amd64_edac: add msr accessors operating on all cpus

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Date:	Tue, 28 Apr 2009 17:06:06 +0200
From:	Borislav Petkov <borislav.petkov@....com>
To:	akpm@...ux-foundation.org, greg@...ah.com
CC:	<linux-kernel@...r.kernel.org>,
	Doug Thompson <dougthompson@...ssion.com>,
	Borislav Petkov <borislav.petkov@....com>
Subject: [PATCH 14/21] amd64_edac: add msr accessors operating on all cpus

From: Doug Thompson <dougthompson@...ssion.com>

Signed-off-by: Doug Thompson <dougthompson@...ssion.com>
Signed-off-by: Borislav Petkov <borislav.petkov@....com>
---
 drivers/edac/amd64_edac.c |   42 ++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 42 insertions(+), 0 deletions(-)

diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c
index ac4e265..49c0ce0 100644
--- a/drivers/edac/amd64_edac.c
+++ b/drivers/edac/amd64_edac.c
@@ -3121,4 +3121,46 @@ static struct pci_dev *pci_get_related_function(unsigned int vendor,
 	return dev;
 }
 
+/* stolen from msr.c - the calls in msr.c could be exported */
+struct msr_command {
+	int cpu;
+	int err;
+	u32 reg;
+	u32 data[2];
+};
+
+static void smp_wrmsr(void *cmd_block)
+{
+	struct msr_command *cmd = cmd_block;
+	wrmsr(cmd->reg, cmd->data[0], cmd->data[1]);
+}
+
+static void smp_rdmsr(void *cmd_block)
+{
+	struct msr_command *cmd = cmd_block;
+	rdmsr(cmd->reg, cmd->data[0], cmd->data[1]);
+}
+
+static void do_wrmsr(int cpu, u32 reg, u32 eax, u32 edx)
+{
+	struct msr_command cmd;
+
+	cmd.cpu = raw_smp_processor_id();
+	cmd.reg = reg;
+	cmd.data[0] = eax;
+	cmd.data[1] = edx;
+	on_each_cpu(smp_wrmsr, &cmd, 1);
+}
+
+static void do_rdmsr(int cpu, u32 reg, u32 *eax, u32 *edx)
+{
+	struct msr_command cmd;
+
+	cmd.cpu = raw_smp_processor_id();
+	cmd.reg = reg;
+	on_each_cpu(smp_rdmsr, &cmd, 1);
+	*eax = cmd.data[0];
+	*edx = cmd.data[1];
+}
+
 
-- 
1.6.2.4


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