From: Oliver O'Halloran <oohall@gmail.com>
To: linuxppc-dev@lists.ozlabs.org
Cc: Oliver O'Halloran <oohall@gmail.com>
Subject: [PATCH 2/2] powerpc/powernv: Add explicit fast-reboot support
Date: Mon, 17 Feb 2020 13:48:33 +1100 [thread overview]
Message-ID: <20200217024833.30580-2-oohall@gmail.com> (raw)
In-Reply-To: <20200217024833.30580-1-oohall@gmail.com>
Add a way to manually invoke a fast-reboot rather than setting the NVRAM
flag. The idea is to allow userspace to invoke a fast-reboot using the
optional string argument to the reboot() system call, or using the xmon
zr command so we don't need to leave around a persistent changes on
a system to use the feature.
Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
---
Companion skiboot patch:
http://lists.ozlabs.org/pipermail/skiboot/2020-February/016420.html
---
arch/powerpc/include/asm/opal-api.h | 1 +
arch/powerpc/platforms/powernv/setup.c | 2 ++
2 files changed, 3 insertions(+)
diff --git a/arch/powerpc/include/asm/opal-api.h b/arch/powerpc/include/asm/opal-api.h
index c1f25a7..1dffa3c 100644
--- a/arch/powerpc/include/asm/opal-api.h
+++ b/arch/powerpc/include/asm/opal-api.h
@@ -1067,6 +1067,7 @@ enum {
OPAL_REBOOT_PLATFORM_ERROR = 1,
OPAL_REBOOT_FULL_IPL = 2,
OPAL_REBOOT_MPIPL = 3,
+ OPAL_REBOOT_FAST = 4,
};
/* Argument to OPAL_PCI_TCE_KILL */
diff --git a/arch/powerpc/platforms/powernv/setup.c b/arch/powerpc/platforms/powernv/setup.c
index a8fe630..3bc188d 100644
--- a/arch/powerpc/platforms/powernv/setup.c
+++ b/arch/powerpc/platforms/powernv/setup.c
@@ -237,6 +237,8 @@ static void __noreturn pnv_restart(char *cmd)
rc = opal_cec_reboot2(OPAL_REBOOT_MPIPL, NULL);
else if (strcmp(cmd, "error") == 0)
rc = opal_cec_reboot2(OPAL_REBOOT_PLATFORM_ERROR, NULL);
+ else if (strcmp(cmd, "fast") == 0)
+ rc = opal_cec_reboot2(OPAL_REBOOT_FAST, NULL);
else
rc = OPAL_UNSUPPORTED;
--
2.9.5
next prev parent reply other threads:[~2020-02-17 2:52 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-17 2:48 [PATCH 1/2] powerpc/powernv: Treat an empty reboot string as default Oliver O'Halloran
2020-02-17 2:48 ` Oliver O'Halloran [this message]
2020-02-24 3:16 ` [PATCH 2/2] powerpc/powernv: Add explicit fast-reboot support Andrew Donnellan
2020-02-24 2:32 ` [PATCH 1/2] powerpc/powernv: Treat an empty reboot string as default Alexey Kardashevskiy
2020-02-24 10:04 ` Segher Boessenkool
2020-02-25 1:38 ` Alexey Kardashevskiy
2020-02-24 3:13 ` Andrew Donnellan
2020-03-06 0:27 ` Michael Ellerman
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