linux-kernel - [PATCH v3 6/6] kvm: arm64: Add ACPI support for virt arch timer

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Date:	Tue,  2 Feb 2016 04:26:58 +0800
From:	fu.wei@...aro.org
To:	rjw@...ysocki.net, lenb@...nel.org, daniel.lezcano@...aro.org,
	tglx@...utronix.de, christoffer.dall@...aro.org,
	marc.zyngier@....com, gleb@...nel.org, pbonzini@...hat.com,
	hanjun.guo@...aro.org, wei@...hat.com,
	a.spyridakis@...tualopensystems.com
Cc:	linaro-acpi@...ts.linaro.org, linux-kernel@...r.kernel.org,
	linux-acpi@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	kvmarm@...ts.cs.columbia.edu, kvm@...r.kernel.org,
	al.stone@...aro.org, graeme.gregory@...aro.org,
	davem@...emloft.net, jeffrey.t.kirsher@...el.com,
	richardcochran@...il.com, arnd@...db.de, wim@...ana.be,
	jcm@...hat.com, leo.duran@....com, mark.rutland@....com,
	catalin.marinas@....com, will.deacon@....com,
	Suravee.Suthikulpanit@....com, robherring2@...il.com,
	Fu Wei <fu.wei@...aro.org>
Subject: [PATCH v3 6/6] kvm: arm64: Add ACPI support for virt arch timer

From: Fu Wei <fu.wei@...aro.org>

This patch adds ACPI/GTDT support for virt arch timer
using the API in GTDT driver.

Signed-off-by: Fu Wei <fu.wei@...aro.org>
---
 virt/kvm/arm/arch_timer.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/virt/kvm/arm/arch_timer.c b/virt/kvm/arm/arch_timer.c
index 0a279d3..4077347 100644
--- a/virt/kvm/arm/arch_timer.c
+++ b/virt/kvm/arm/arch_timer.c
@@ -385,6 +385,9 @@ static int kvm_timer_get_ppi(unsigned int *ppi)
 {
 	struct device_node *np;
 	int ret = -EINVAL;
+#ifdef CONFIG_ACPI_GTDT
+	struct arch_timer_data data;
+#endif
 
 	np = of_find_matching_node(NULL, arch_timer_of_match);
 	if (!np) {
@@ -397,6 +400,11 @@ static int kvm_timer_get_ppi(unsigned int *ppi)
 	of_node_put(np);
 
 skip_of:
+#ifdef CONFIG_ACPI_GTDT
+	if (!*ppi && !gtdt_arch_timer_data_init(NULL, &data))
+		*ppi = data.virt_ppi;
+#endif
+
 	if (*ppi)
 		return 0;
 
-- 
2.5.0