From: Michael Ellerman <mpe@ellerman.id.au>
To: linuxppc-dev@ozlabs.org
Cc: linux-kernel@vger.kernel.org, tglx@linutronix.de,
peterz@infradead.org, npiggin@gmail.com, anton@samba.org,
mikey@neuling.org, oohall@gmail.com, paulus@samba.org
Subject: [PATCH 10/11] powerpc/pseries: Query hypervisor for RFI flush settings
Date: Tue, 9 Jan 2018 03:54:52 +1100 [thread overview]
Message-ID: <20180108165453.26066-10-mpe@ellerman.id.au> (raw)
In-Reply-To: <20180108165453.26066-1-mpe@ellerman.id.au>
From: Michael Neuling <mikey@neuling.org>
A new hypervisor call is available which tells the guest settings
related to the RFI flush. Use it to query the appropriate flush
instruction(s), and whether the flush is required.
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
---
arch/powerpc/platforms/pseries/setup.c | 35 ++++++++++++++++++++++++++++++++++
1 file changed, 35 insertions(+)
diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c
index 28b286df0e91..db76963e693d 100644
--- a/arch/powerpc/platforms/pseries/setup.c
+++ b/arch/powerpc/platforms/pseries/setup.c
@@ -459,6 +459,39 @@ static void __init find_and_init_phbs(void)
of_pci_check_probe_only();
}
+static void pseries_setup_rfi_flush(void)
+{
+ struct h_cpu_char_result result;
+ enum l1d_flush_type types;
+ bool enable;
+ long rc;
+
+ /* Enable by default */
+ enable = true;
+
+ rc = plpar_get_cpu_characteristics(&result);
+ if (rc == H_SUCCESS) {
+ types = L1D_FLUSH_NONE;
+
+ if (result.character & H_CPU_CHAR_L1D_FLUSH_TRIG2)
+ types |= L1D_FLUSH_MTTRIG;
+ if (result.character & H_CPU_CHAR_L1D_FLUSH_ORI30)
+ types |= L1D_FLUSH_ORI;
+
+ /* Use fallback if nothing set in hcall */
+ if (types == L1D_FLUSH_NONE)
+ types = L1D_FLUSH_FALLBACK;
+
+ if (!(result.behaviour & H_CPU_BEHAV_L1D_FLUSH_PR))
+ enable = false;
+ } else {
+ /* Default to fallback if case hcall is not available */
+ types = L1D_FLUSH_FALLBACK;
+ }
+
+ setup_rfi_flush(types, enable);
+}
+
static void __init pSeries_setup_arch(void)
{
set_arch_panic_timeout(10, ARCH_PANIC_TIMEOUT);
@@ -476,6 +509,8 @@ static void __init pSeries_setup_arch(void)
fwnmi_init();
+ pseries_setup_rfi_flush();
+
/* By default, only probe PCI (can be overridden by rtas_pci) */
pci_add_flags(PCI_PROBE_ONLY);
--
2.14.3
next prev parent reply other threads:[~2018-01-08 16:56 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-08 16:54 [PATCH 01/11] powerpc/pseries: Add H_GET_CPU_CHARACTERISTICS flags & wrapper Michael Ellerman
2018-01-08 16:54 ` [PATCH 02/11] powerpc/64: Add macros for annotating the destination of rfid/hrfid Michael Ellerman
2018-01-08 16:54 ` [PATCH 03/11] powerpc/64s: Simple RFI macro conversions Michael Ellerman
2018-01-08 17:09 ` Peter Zijlstra
2018-01-08 21:01 ` Paul Mackerras
2018-01-08 22:04 ` Michael Ellerman
2018-01-08 16:54 ` [PATCH 04/11] powerpc/64: Convert the syscall exit path to use RFI_TO_USER/KERNEL Michael Ellerman
2018-01-08 16:54 ` [PATCH 05/11] powerpc/64: Convert fast_exception_return " Michael Ellerman
2018-01-08 16:54 ` [PATCH 06/11] powerpc/64s: Convert slb_miss_common " Michael Ellerman
2018-01-08 16:54 ` [PATCH 07/11] powerpc/64s: Add support for RFI flush of L1-D cache Michael Ellerman
2018-01-09 7:02 ` Joel Stanley
2018-01-09 16:05 ` Michael Ellerman
2018-01-25 9:10 ` Christian Zigotzky
2018-01-30 2:11 ` Michael Ellerman
2018-01-08 16:54 ` [PATCH 08/11] powerpc/64s: Support disabling RFI flush with no_rfi_flush and nopti Michael Ellerman
2018-01-08 16:54 ` [PATCH 09/11] powerpc/64s: Allow control of RFI flush via sysfs Michael Ellerman
2018-01-08 17:20 ` Thomas Gleixner
2018-01-08 22:09 ` Michael Ellerman
2018-01-09 6:06 ` Jon Masters
2018-01-09 8:05 ` Greg KH
2018-01-09 8:11 ` Jon Masters
2018-01-09 8:03 ` Greg KH
2018-01-08 16:54 ` Michael Ellerman [this message]
2018-01-08 16:54 ` [PATCH 11/11] powerpc/powernv: Check device-tree for RFI flush settings Michael Ellerman
2018-01-08 21:57 ` Tyrel Datwyler
2018-01-11 2:25 ` [01/11] powerpc/pseries: Add H_GET_CPU_CHARACTERISTICS flags & wrapper Michael Ellerman
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